Xi'an YuanQi Elevatorparts Company: elevator inverter with motor no-load operation

Xi'an YuanQi Elevatorparts Company: elevator inverter with motor no-load operation: 1 inverter panel operation manual stop button to stop the process and observe the motor running Thyssen Elevator parts of the inverter disp...

elevator inverter with motor no-load operation

1 inverter panel operation manual stop button to stop the process and observe the motor running Thyssen Elevator parts of the inverter display window to see if there is abnormal phenomenon.

(2) If you start the process of stopping the motor P Thyssen Elevator accessories action inverter overcurrent occurs, P should be re-set acceleration and deceleration time. Motor acceleration or deceleration acceleration depends on the acceleration torque, while the Thyssen Elevator parts of the inverter at Kai, the frequency change during braking rate is set by the user. If the moment of inertia of the motor or the motor load changes, at a pre-set frequency rate of change up or Slow down when there may be insufficient acceleration torque, resulting in motor stall, ie the motor speed and the Thyssen Elevator parts of the inverter output frequency is not coordination, resulting in over-current or over-voltage. Therefore, according to the motor and load inertia set reasonable acceleration, deceleration time, so that Thyssen Elevator parts of the inverter frequency rate with the rate of change of motor speed to match. Check this setting reasonable approach is to initially experience the selected acceleration and deceleration time settings during startup if an overcurrent can be appropriate to extend the acceleration time; if overcurrent occurs during braking, then appropriate to extend the deceleration time. On the other hand, acceleration, deceleration time should not be set too long, too long will affect productivity, especially frequent start when braking.

3 If the Thyssen Elevator parts of the inverter for a limited period of time is still protected, you should change the boot P stopped running curve, from a straight line to the S-shaped, U-shaped cable or S-shaped, inverted U-shaped line. Motor load inertia is large, you should use a longer start and stop time, and set to run under its load characteristic curve type.

4 If Thyssen Elevator parts of the inverter operation fault persists, you should try to increase the maximum current protection value, but can not cancel the protection, should leave at least 10% to 20% protection margin.

5 If Thyssen Elevator parts of inverter operation failure happened, you should replace a larger power inverter

6 If Thyssen Elevator parts of the inverter drive motor during startup reach preset speed, there are two possible situations:

(1) Electrical system resonance occurs, the sound from the motor running for judge.

Set the value of using frequency hopping method, you can avoid the resonance point. General Thyssen Elevator parts of the inverter can be set three jumps. VPf controlled inverter-driven induction motor, in certain frequency bands, the motor current, speed may oscillate when the system can not run a serious, even during acceleration overcurrent protection does not start the motor, the motor is lightly loaded or a small moment of inertia is more serious. Common frequency converter are equipped with cross-jump function, users can oscillate according to the frequency of the system point on the curve in VPf set up cross-hop and multi-hop width. When the motor speed can be automatically skip these frequency bands, to ensure the system to normal operation.

(2) the motor torque output capability is not enough, different brands of inverter factory parameter settings are different, in the same conditions, with the capacity to different control methods may also be due to a different drive, causing the motor load different capacities; or output efficiency due to different systems, causing the load capacity will vary. In this case, the lift amount can be increased torque value. If you can not reach, use manual torque boost function, do not set too large, then the temperature rise of the motor will increase. If it still does not work, it should use the new control methods, such as Thyssen Elevator accessories inverter using VPf constant ratio method, start fail, they use non-velocity space vector control method, which has a greater transfer torque output capability. For fan and pump loads should be reduced down torque curve values.

Xi'an YuanQi Elevatorparts Company: Basic knowledge about the elevator inverter

Xi'an YuanQi Elevatorparts Company: Basic knowledge about the elevator inverter: 1, what is the frequency? The elevator inverter is the use of power semiconductor devices will be the role-off frequency to another frequen...

Basic knowledge about the elevator inverter

1, what is the frequency?

The elevator inverter is the use of power semiconductor devices will be the role-off frequency to another frequency power conversion power control devices.

2, PWM and PAM What is the difference?

PWM is the English Pulse Width Modulation (Pulse Width Modulation) acronym, according to certain rules to change the pulse width of the pulse train to adjust the output volume and a tone waveform by value. PAM is the English Pulse Amplitude Modulation (pulse amplitude modulation) acronym is changed according to certain rules pulse amplitude pulse train, to regulate the output value and a modulation waveform.

3, voltage-and current-What is the difference?

elevator inverter main circuit can be divided into two categories: voltage is converted to DC voltage source elevator inverter AC and DC circuit filter is a capacitive; Current DC current source is converted to AC elevator inverter, its stone DC circuit filter inductor.

4, why the elevator inverter voltage and current proportional to the change?

Induction motor magnetic flux and the torque of the motor and the rotor current flows resulting from the interaction between the rated frequency, if the voltage is fixed and only the lower frequency, then the magnetic flux will be too large, the magnetic circuit saturation, severe The burning motor. Therefore, the frequency and voltage proportional to a change, that is to change the frequency converter output voltage while controlling the motor to maintain a certain flux, to avoid weakening and magnetic saturation phenomenon. This control method is used for fan and pump energy-saving elevator inverter.

5, motor drive using frequency power supply, the voltage drop is current increases; For elevator inverter-driven, if the frequency drops voltage drop, then the current is increased?

Frequency down (low), if the same power output, the current increases, but under certain conditions, the torque current is almost constant.

6, using the elevator inverter operation, the motor starting current, starting torque what?

Using elevator inverter operation, with a corresponding increase in the acceleration of the motor frequency and voltage, the starting current is limited to 150% of rated current (according to different models, 125% to 200%). Labor-frequency power directly when starting current of 6 to 7 times, therefore, will have an impact on the mechanical and electrical. With elevator inverter drive can smoothly start (start time becomes longer). Starting current for the rated current of 1.2 to 1.5 times the starting torque of 70% to 120% of the rated torque; For enhanced functionality with automatic torque converter, the starting torque of 100% or more, you can start with a full load.

7, V / f mode What does it mean?

Frequency drops voltage V is also proportional to the decline, the question has been answered four instructions. The ratio between V and f are considered characteristic of the motor determined in advance, usually in the controller memory means (ROM) in that there are several features that can switch or the dial to select.

8 and proportionate change V and f, the motor torque to change?

Down completely when the frequency is reduced proportionally to the voltage, the impedance becomes smaller as the DC resistance constant, would result in a low torque is generated under a reduced tendency to. Therefore, given the low frequency V / f, the output voltage is increased to make some manner so as to obtain a starting torque, this compensation called enhanced start. Variety of methods can be used, a method of automatically select V / f pattern or adjusting potentiometer and other methods.

9, written in the manual speed range 60 ~ 6Hz, namely 10:1, then the following 6Hz no output power do?

In 6Hz still output power, but according to the temperature rise and motor starting torque of the size of the other conditions, the lowest frequency of use to take 6Hz, at which point the motor rated torque can be output without causing severe heat problems. Actual elevator inverter output frequency (starting frequency) based on models for the 0.5 ~ 3Hz.

10, for general motor combination is above 60Hz also requires a certain torque, can we?

Normally when not. Above 60Hz (50Hz or more modes also) voltage constant, a substantially constant power characteristics, require the same torque at high speed, we must pay attention to the choice of motor and elevator inverter capacity

11, the so-called open-loop What does it mean?

Motor means to be used for speed detection device (PG), the actual speed back to the control means controls, called "closed loop", without PG operation is called "open loop." Universal Converter, mostly open-loop mode, and some models can be use PG feedback option.

12, the actual speed deviation for a given speed on how to do?

Open loop, even if the output for a given frequency of the elevator inverter, the motor with the load operation, the motor speed at the rated slip of the range (1% to 5%) change. For applications requiring speed accuracy is relatively high, even if the load change also requires close to a given speed operation of the occasion, PG feedback function can be used with the drive (optional part).

13, if used with the PG motor feedback can improve speed accuracy after you?

With PG feedback function of the elevator inverter, the accuracy improves. But the speed depends on the accuracy of implant PG itself elevator inverter output frequency accuracy and resolution.

14, stall prevention function mean?

If the given acceleration time is too short, the elevator inverter output frequency changes much more than speed (electrical angular frequency) change, the drive will overcurrent flows due to trip, running stop, which is called stall. In order to prevent stalling of the motor continues to run, it is necessary for detection of the current size of the frequency control. When the acceleration current is too large appropriate to slow down the acceleration rate. Deceleration as well. Combine the two is the stall function.

15, there is acceleration time and deceleration time can be given, respectively, models, and ramp time together given the aircraft, what's the point?

Acceleration and deceleration can be respectively given model, for quick acceleration, slow deceleration occasions, or for a small machine requires strict tact time given occasion is appropriate, but for the fan drive and other occasions, acceleration and deceleration time longer acceleration time and deceleration time can be given together.

16, what is the regenerative braking?

If you lower the motor during operation command frequency, the motor becomes non-state synchronous generator running, while working as a stopper, which is called regenerative (electric) braking.

17, if a greater braking force can be obtained?

Regenerative energy from the motor out of the piling in the elevator inverter filter capacitor, the capacitance of the capacitor and the voltage relationship between the general frequency of the regenerative braking force of the rated torque of 10% to 20%. If using the optional parts brake unit, can reach 50% to 100%.

18, the torque boost problems

Automatic control system signal can be set freely by the elevator inverter flexible frequency change command and control process indicators, such as in the tobacco industry, sugar, spices process, known by the belt drive traffic signals to control the frequency of the rotational speed of the pump with the flow signal changes automatically adjust feeding amount evenly add flavor, sugar. Production line can also use start-stop signal through the positive and negative terminals of the elevator inverter control starting and stopping and positive, reverse and become a part of automatic assembly line. In addition, in the assembly line, the current device is faulty rear side equipment should be automatically shut down. elevator inverter emergency stop client can achieve this functionality. In SANKEN, MF, FUT and FVT series elevator inverter can be pre-set three or four or even up to seven frequencies, some devices can be set accordingly automated production processes. Set frequency and time, the drive motor can sequentially at different times with different speed operation, to form an automated production process.

19, the motor exceeds 60HZ should pay attention to what the problem is?

  1) of the machines and apparatus operating speed may be adequate (mechanical strength, noise, vibration, etc.)

  2) motor enters constant power output range, the output torque to be able to repair work (fans, pumps and other shaft output power is proportional to the cube of the speed increases, so speed is a little higher should also pay attention)

  3) produce bearing life issues, to be fully taken into account.

  4) For the above motor capacity especially 2-pole motor at 60HZ over operation of special attention.

20, in order to Plateau conveyor speed to 80HZ running, how to select the elevator inverter capacity?

  Let the reference speed is 50HZ, 50HZ above constant power output characteristics. Such as conveyor constant torque load growth, the capacity needs to be increased to 80/50 = 1.6 times. The same as the drive motor capacity also increases.

21, would like to make two 2. 2KW, 4-pole motor sequence starting with an elevator inverter drive capacity should I consider when?

    If two 2. 2KW motor simultaneously start and stop, set 2. 2KW rated current of 10A, 20A then twice the calculation 5. 5KW (Rated Current 24A) of the elevator inverter is sufficient. Starting sequence, the second motor starting current needed, the equivalent full pressure start to six times the rated, the need to be able to withstand the over-current is (10 +6 X10) A = 70A of the elevator inverter, that is, 15KW or more, so, with a converter sequentially starting price, size is no advantage to using two separate drive as well.

22, what is the frequency resolution? What is the significance?

    The digital controller of the elevator inverter, even if the frequency command to an analog signal, the output frequency is given a grade. The steps of the smallest unit called frequency resolution.

  Frequency resolution is usually a value of 0. 015 ~ 0. 5HZ. For example, a resolution of 0. 5HZ, then 23HZ variable frequency above 23. 5,24. 0HZ, so the motor is also a class action to follow. Such as the continuous take-up control for the purpose of causing a problem, in this case, if the resolution is 0. 015HZ so, for a 4-pole motor 1 is 1RPM the following steps can be sufficiently adapted. In addition, some models given resolution and output resolution is not the same.

24, do not use the soft starter, the motor directly into a fixed frequency elevator inverter can?

    At very low frequencies is possible, but if a given frequency high frequency power is directly start with the conditions are similar. Will flow through the large starting current (6 to 7 times the rated current), cut off the elevator inverter overcurrent, motor can not start.

Xi'an YuanQi Elevatorparts Company: Elevator Sales staff should have the ability of se...

Xi'an YuanQi Elevatorparts Company: Elevator Sales staff should have the ability of se...: （ 1 ） be able to read the Company's elevator standard layout. That are based layout to explain to customers the elevator shaft constru...

Elevator Sales staff should have the ability of several (1)

（1）be able to read the Company's elevator standard layout. That are based layout to explain to customers the elevator shaft construction technical problems, special problems can factory technical support personnel.

(2) be able to identify with elevator-related architectural drawings. Salesperson should be able to provide customers with the construction drawings found in the elevator hoistway related drawings and related parameters, including:

Elevator shaft profiles (including storey deep pit, room high Tingmen corbels and other data);

Elevator hoistway plan (including the hoistway flat net size, width and direction of the door, wall thickness, etc.);

Elevator machine room floor plan (including room flat dimensions, wells and the relative position of the engine room, the door position, etc.).

Also some construction drawings merge the contents of the above in a graph. Many construction drawings which brand is also marked by an elevator design, and construction of the elevator manufacturer's instructions and other matters.

For a large number of elevator project, to be able to detail the elevator hoistway total building floor plan with the positioning axis to determine the location and number of each elevator.

Sales staff should also have some commonly associated with the elevator hoistway construction terminology and relevant knowledge, which is conducive to lift sales staff and building design and construction personnel to communicate. For example: beams, columns, foundations, lintels, ring beams, corbels, reinforcement, stirrups, shear walls, concrete grade, etc. The meaning of these terms.

(3) on-site wells to measure and make a record.

Sales personnel should know what needs to sign the contract goods hoistway data and measurement methods, measurement results can also sketch the scene. Sketches requirements broadly in line with the proportion of the data labels is accurate, legible, the special structure to indicate, if necessary, should draw the detail view. Measurements accurate to the centimeter as long as you can.

(4) a general understanding of the elevator installation process.

Elevator installation basic steps: cleaning wells and see whether they have on-site installation conditions, provide temporary warehouse, unpacking inspection parts, scaffolding, production model, put the reference line, bracket mounting rails, mounting rails, mounting the engine room equipment, installation Tingmen device , mounted on heavy at the bottom, on the top floor loading the car, installing wells and mechanical equipment, hanging rope, installation of electrical devices are arranged hoistway cables and trailing cables, machine commissioning and acceptance.

Understanding these beneficial salesperson's understanding of the elevator construction, especially when the master batch shipments shipped order.

Xi'an YuanQi Elevatorparts Company: Classification of elevator motors

Xi'an YuanQi Elevatorparts Company: Classification of elevator motors: Elevator motors and industrial motors, as there are different categories, from different angles can be divided into multiple. On the type o...

Classification of elevator motors

Elevator motors and industrial motors, as there are different categories, from different angles can be divided into multiple. On the type of elevator motors, for example as follows:

A) Press the power points:

Elevator motor with AC and DC elevator motors two categories, as the drive load of the hoisting machine or the elevator drive motor, the motor type is, its power supply is also divided into AC and DC types.

AC elevator motors, essentially asynchronous (induction) motors, the rotor speed is also called the synchronous speed lower than the speed of rotating field in the stator.

AC lift motor stator is basically a three-phase power supply, but the voltage is divided into many; such as 220V, 380V, 420V, 440V, etc., most of 380V. AC power frequency is the frequency, but often 50Hz and 60Hz categories.

Two) divided by braking with brake and without brake categories.

AC motors are generally two types of elevator motors, motors without brake and often by a multi-pole windings to make the brake windings, while the DC lift motor braking is achieved by circuit control, AC lift motor with brake, brake Winding often supplied with direct current.

Three) divided by ventilation with fan and without fan categories.

Current common elevator motors, whether AC or DC's, basically with a dedicated fan, to achieve forced air, and heat-sensitive switch to control.

Old-fashioned elevator motors - generally without fans, and even that is an ordinary three-phase asynchronous electric four) by the structure have seat belt machine and without the base of the two categories: general DC lift motor with the base, and the base required magnetic properties, so the steel material, can be cast, you can also use welded steel plate bending, for AC lift motor, the imitation of America otis elevator motors, and imitation Mitsubishi elevator motors, the stator base circular structure is the use of the stator pieces, there are chassis (seat), fan cooled. Average volume than people, and imitation Swiss exchanges on Schindler Elevator motor utilizes a unique structure. Stator Stator using octagonal piece of AC lift motor rotor structure in accordance to points: cast aluminum structure and the structure of two copper bars. Shorted turn in the middle of another, especially in the ring and have asked two short rings.

After using the middle of the elevator motor short-circuit loop start running a brake three run some have achieved good performance. Intermediate traction motor short-circuit ring was originally a novel structure, which after the introduction of the elevator motor, and achieved satisfactory results.

Press the bearing structure points: Rolling bearing structures and types of sliding bearing type, generally DC elevator motors Bing rolling bearings. The AC motor with a sliding bearing elevator after the small bearing noise greatly thief, thereby reducing motor noise.

According to the structure of the motor windings; has a single winding, dual winding and multi-winding several categories.

Elevator operation is an advanced form of motor speed, in order to meet the performance requirements turtle ladder run. There is often dual, multi-winding structure, but from an efficiency perspective, there are also disadvantages. A single winding, the dipolar modulation scheme, the efficiency can be improved, energy-saving effect is better, but to pay attention to the sinusoidal magnetic field. Minimize harmonics.

Press versatility points: hunger and Y series induction motor is basically common structure of the elevator motor. And Y series induction motor and the basic structure of the elevator feet is not common motor types.

Inverter applications on the escalator

    Current conventional escalator is still no-load rated speed operation, high energy consumption, mechanical wear, long service life and low defects. For example, 16 Jilin Trade Mall escalators, each electric power escalators 8kW, power 70kWh per day about escalators, running 11 hours a day, and always constant speed operation, in most cases, run at higher escalator 2/3 of the rated capacity or less, no-load each time the cumulative daily escalators for about 5 hours. If the escalator in the absence of the no-load shutdown or put on hold, will greatly reduce electricity consumption. If the escalator from the daily continuous operation mode was changed to constant run properly when riding constant speed, no ladder slow moving or stopped, will be able to achieve the purpose of saving. Reference to the large amounts of data, I feel this way can achieve.

    After research trials in escalator installation of electrical control circuit inverter, can be realized by a simple transformation of this function. Frequency control mode control escalator run, so that the escalator with a smooth start, energy-saving operation. No ladder, the escalator from the rated speed into low-speed operation, which saves energy, but also reduces the mechanical wear. When a passenger approached, escalator starts running at normal speed; passengers left, escalators deceleration becomes slow running or stopped, waiting for the next one passenger. If passengers continuously, escalators will continuously run at normal speed, until the last one to leave the escalator passengers.

    Now most of the production is no escalator speed control function, and escalators are made by three-phase asynchronous motor driven mechanical parts gearbox operation. According to the motor theory, AC motor speed formula is:

n = 60 × f / p (1 - s)

Formula: f is the frequency of the stator power; p the number of pole pairs; n is speed; s the slip.

(A) change the motor pole pairs p can change the motor speed, which is used in AC double-speed motor speed control method.

(Two) by adjusting the size of the stator winding voltage to change the purpose of the slip s to achieve speed control, which is used in AC variable speed motor speed control method.

(Three) the power to change the stator frequency f can achieve speed control purposes, but f can not exceed the maximum rated motor frequency, elevator as a constant torque load, speed and time in order to maintain maximum torque constant, according to the torque equation:

M = CmφIcosφ

The formula: Cm for the motor constant; I is the rotor current; φ of the motor air gap flux; cosφ the rotor power factor, φ must be kept constant. Also according to the voltage equation:

U = 4.44fWkφ

Where: U is the stator voltage; f is the stator voltage frequency; W is the stator winding turns; k constant for the motor, must be maintained U / f is constant, and according to principles of motor drive, the speed ratio of the ratio equal to the frequency equal to voltage ratio,

Equal to the power ratio.

Namely N0 / N1 = f0 / f1 = U0 / U1 = P0 / P1

Ie, the inverter must both transformer, frequency two functions, which is the fundamental frequency elevator control principle.Third, the economic analysis Change the existing variable speed constant escalator escalator, taking into account the motor without change, the original of the motor, after verification, the most effective way to save energy is to install the drive. By changing the power frequency inverter to achieve the purpose of speed. For example:Escalator motor for the two pairs of pole single speed motors, according to the formula

n = 60 × f / p (1 - s)

When the slip little change, n is essentially proportional to f. Escalator constant speed f = 50Hz, motor speed:

n = 60 × 50/2 = 1500, i.e. 1500 rpm.

Escalator slow line f = 20Hz, motor speed:

n = 60 × 20/2 = 600, 600 revolutions per minute.

When the motor is rated at 380V, frequency is 50Hz, through the inverter to change the frequency, the frequency of the original frequency of 40%, ie 20Hz when sent to the motor voltage becomes:

U1 = (380V × 20Hz) / 50Hz = 152V

According to the formula U0 / U1 = P0/P1 drawn P1 = 0.4P0

Thus the electric power consumed by the motor is 40% of the original power.

Based on the above projections, a 8kW electric motor, running 11 hours a day, electricity is 1 yuan per kWh, then it is a day of electricity:

1 × 11 × 8 × 0.8 = 70.4 million.

After installing the drive, if the daily Slow Running time 50% of the day, then slow-consuming daily tariff is:

1 × 5.5 × 8 × 0.4 × 0.8 = 14.08 million.

After installing the drive as a daily consumption: 70.4 / 2 +14.08 = 49.28 yuan.

After installing the drive as a daily saving: 70.4-49.28 = 21.12 yuan.

By measuring the actual saving energy meter around 20kWh per day.

Xi'an YuanQi Elevatorparts Company: Use high-quality elevator parts, for everyone's sa...

Xi'an YuanQi Elevatorparts Company: Use high-quality elevator parts, for everyone's sa...: According to data released by AQSIQ, China's annual increase in the number of elevators 300,000 or more. In many security risks, the...

Use high-quality elevator parts, for everyone's safety!

According to data released by AQSIQ, China's annual increase in the number of elevators 300,000 or more.

In many security risks, the current security threats on the domestic elevator use the most prominent is the "aging" crisis. According to statistics, China's elevator ownership has more than 1.63 million units, of which a considerable part of the 1990s, installation of an elevator, use the time up to ten years, and even some elevators used for over 20 years. However, due to the current state does not provide for mandatory retirement age elevator, leading to a large number of old elevator still sick to run, increasing the incidence of elevator accident.

"At present, Shanghai more than 15 years old accounted for a rough estimate of the old elevator lift 15% of the total, including each zone subway escalators, elevators old district of Van, some large shopping malls and other public elevator, this figure annually are incremented. these "overage elevator", if maintenance work has not kept up, there may be some security risks.

Elevator accidents, 80% of accidents happened in the maintenance aspect, which is the follow-up repair and maintenance is not in place, which is of special equipment testing, maintenance, updates, and other related procedures are not standardized. Maintenance units in order to save costs, parts procurement in the elevator will greatly lower prices, which led to a lot of substandard elevator parts into the market. Brought to the elevator market risks!

Elevator Association Expert Committee official said that China Elevator Maintenance is mainly based on "Management and maintenance of elevator use rules" maintenance units in accordance with the contract, the company commissioned by the property for 15 days once the elevator maintenance. But most repair and maintenance units are small, weak, poor treatment, difficult to cultivate and retain high-level skilled workers. Combined with a lot of elevator owners to implement "Maintenance subcontracting" third party in order to save costs, maintenance is likely to result not in place, risk increased. With this stage to improve the quality of people's lives, the increasingly high demand for travel, the elevator has become an irreplaceable tool. If the elevator can not guarantee the safety of people's lives, then how should we do it? So called Maintenance units and an elevator manufacturers, elevator parts used to strengthen the control. Lifts can be used to ensure that each high-quality elevator parts!

Elevator "old age", plus maintenance negligence, so that every day dealing with the elevator user misgivings. Who lives in an old district of Pudong, Shanghai Hu Kai described to reporters that he built in the district where earlier time, a problem often encountered in the elevator situation. "Although the property and also reflect over, but the maintenance is after all a temporary solution, but it can often fail to pass the annual, I also find it strange."

Xi'an YuanQi Elevatorparts Company: How does elevator inverter work ?

Xi'an YuanQi Elevatorparts Company: How does elevator inverter work ?: Now lift  elevator inverter  principle are used to control the frequency converter, the fault when the inverter will cause inconvenience ...

How does elevator inverter work ?

Now lift elevator inverter principle are used to control the frequency converter, the fault when the inverter will cause inconvenience to many people, if maintenance personnel can correctly understand the principle of elevator drive, then you have easy maintenance. Here by us Hui Bo Times Technology Co., Ltd. was telling you about this knowledge. VVVF Variable Voltage and Variable Frequency is the acronym meaning changing the voltage and frequency of change, that is, they say, VVVF. CVCF is Constant Voltage and Constant Frequency acronym, meaning constant voltage, constant frequency, that is, they say, constant voltage constant frequency. We use the power into AC power and DC power, DC power supply generally mostly through the transformer from the AC power source transformer, rectifier obtained. AC power using the power of the people accounted for 95% of the power used. Whether for home or for factories, single-phase and three-phase AC power supply, the voltage and frequency according national regulations have certain criteria, such as mainland China provides direct user single-phase AC power is 220V, three-phase AC wire voltage 380V, frequency of 50Hz, other countries may be in supply voltage and frequency of the voltage and frequency are different, if single-phase 100V/60Hz, three phase 200V/60Hz, etc., the standard voltage and frequency of the AC power supply called frequency alternating current.

Typically, the voltage and frequency fixed frequency alternating current is converted to a variable frequency AC voltage or a device called a "drive." In order to generate a variable voltage and frequency, the device is first necessary to convert AC power to DC (DC), this process is called rectification. The direct current (DC) is converted into alternating current (AC) of the device, its scientific term for the "inverter" (inverter). General Inverter is the DC power inverter is a certain fixed frequency and constant voltage power inverter. For the adjustable frequency inverter, voltage adjustable frequency inverter we called. Inverter output waveform is an analog sine wave, is mainly used in three-phase induction motor drive with, also known as inverter. Mainly used in the instrumentation for the detection devices require a higher variable frequency wave inverter, to sort out the waveform, you can output standard sine wave, called the variable frequency power supply. Frequency power inverter prices are generally 15 - 20 times. Since the inverter device generates a voltage or frequency changes in the primary device called "inverter", so the product itself is named "inverter", namely: inverter. Inverter can also be used in home appliances products. Use the inverter home appliances products, not only motor (such as air conditioning, etc.), as well as fluorescent lamps and other products. Inverter for motor control, either change the voltage, but also can change the frequency. But are used primarily for regulating fluorescent lamp inverter power supply frequency. Used car battery (DC) to produce alternating current devices "inverter" name for sale. The working principle of the inverter has been widely used in various fields. Such as computer power supply, in the application, the drive for inhibiting reverse voltage, frequency fluctuations and power of instantaneous power.

We repair a lot of the elevator inverter schematic inverter for elevator and found a lot of trouble because of their work environment through high temperature components likely caused by aging, elevator inverter installed in the building's topmost control room, often in the summer by sun exposure, coupled with the drive itself and the braking resistor heating, the electrical room temperature is very high, the working environment temperature will shorten the life of electronic components! Drive more obvious in this regard, the elevator electrical room ventilation problems in the design in addition to also pay attention to insulation, such as walls with hollow bricks, chamber top multi-layer design, if accompanied by an air conditioner, the drive's lifespan considerably longer !

Xi'an YuanQi Elevatorparts Company: The use of elevator inverter

Xi'an YuanQi Elevatorparts Company: The use of elevator inverter:     VVVF elevator inverter lift electronic control system includes the main controller, inverter and other hosts. MicroMaster440 series inv...

The use of elevator inverter

    VVVF elevator inverter lift electronic control system includes the main controller, inverter and other hosts. MicroMaster440 series inverter is developed by Siemens Multifunctional inverter. It's rated power ranges from 0.12Kw to 75Kw (constant torque), using a modular design, compact structure, having a plurality of freely defined input and output points, to meet a variety of customer requirements. The inverters are microprocessor controlled and uses advanced technology with modern insulated gate bipolar transistor (IGBT) as the power output devices. Therefore, they have a high reliability and functional diversity. A pulse width modulation switching frequency is optional, which can reduce the operating noise of the motor. Full and complete protection for the inverter and the motor provides a good protection.

Control System Components

    Electric control system uses a table 15kw motor, an inverter 15kw MicroMaster440 units as the main driver. Inverter braking unit and braking resistor feedback when releasing the brake run mechanical energy. System is simple and reliable, more traditional control method saves installation space, and improve reliability. Smooth motor starting current impact is small. Mechanical shock is also greatly reduced, increased operating life. Inverter control via terminals through digital input terminals (DIN) ON/OFF1 command and given a fixed frequency reference. Through three relay output signals to the feedback current inverter operation status, received by the encoder template rotary encoder signals. Inverter using closed-loop vector control.

Operating principle and functions

    Elevator inverters are used in applications where higher-end transmission applications must use closed-loop vector control to achieve good control effect. Vector control is a theory first proposed by Siemens and the practical realization of the project first phase asynchronous motor control, has reached the level of DC motor control. It simulates the DC motor control torque of the motor current is divided into two directions, respectively, and the excitation control can be used for high-precision speed control, torque control. In order to avoid starting to slip, and to overcome the startup guide shoes and static friction between the rails is a good start to achieve comfort, you need to start the process, open the front brake that is applied to a very small additional speed setpoint to inverter, the brake open the motor is in apparent motion non-moving state to strictly follow the speed given curve, to ensure comfort.

Xi'an YuanQi Elevatorparts Company: elevator inverter commissioning

Xi'an YuanQi Elevatorparts Company: elevator inverter commissioning: elevator inverter commissioning 1 Set the motor power, very few, considering the elevator to the operating current of the inverter. (2) S...

elevator inverter commissioning

elevator inverter commissioning
1 Set the motor power, very few, considering the elevator to the operating current of the inverter.
(2) Set the maximum output frequency of the inverter elevator, baseband, set the torque characteristics. Universal elevator inverter are available in many VPf curve for users to choose, users should be used according to the nature of the load curve select the appropriate VPf. If the fan and pump load, the torque converter to the elevator run code set to become operational characteristics of torque and torque reduction. In order to improve low-speed elevator inverter startup performance, so that the motor output torque can meet the production requirements of the load starts, to adjust the starting torque. In Thyssen Elevator parts of induction motor speed control system, the torque control is more complex. In the low frequency range, since the resistance, the leakage resistance effect can not be ignored, if VPf remain constant, the flux will decrease, thereby reducing the output torque of the motor. Therefore, the voltage at low frequencies to be appropriately compensated for to improve torque. Lift the drive by the general user manual to set the compensation. 3 Set the elevator inverter comes with keyboard operation mode, press the Run button, stop button, observe whether the motor can normally start, stop.
4 familiar with the drive is running a protection code fails to observe the thermal protection relay factory value, observe overload protection settings can be modified if necessary. The use of personnel elevator inverter can drive to the operating instructions for the inverter to set the electronic thermal relay function. When the inverter output current exceeds its allowable current, the inverter overcurrent protection will shut off the inverter output. Therefore, the inverter electronic thermal relay does not exceed the maximum threshold for the maximum allowable output current of the inverter.

Xi'an YuanQi Elevatorparts Company: Maintenance and inspection of the elevator guide s...

Xi'an YuanQi Elevatorparts Company: Maintenance and inspection of the elevator guide s...: Maintenance and inspection of the elevator guide shoe 1) side of the boot liner of the car elevator guide shoe and the guide rail gap is ...

Maintenance and inspection of the elevator guide shoe

Maintenance and inspection of the elevator guide shoe
1) side of the boot liner of the car elevator guide shoe and the guide rail gap is 0.5 ~ 1mm. Elastic sliding elevator guide shoe boots lining the rail top surface without gaps, elevator guide shoes spring adjustment range does not exceed 5 mm. Fixed sliding elevator guide shoe boots lining the rail top surface gap of 1 to 2 mm. Redirection boots boots lining the rail top surface gap is not more than 2.5 mm. Rolling elevator guide shoes wheel and rail surface gap of 1 to 2 mm.
2) the car and the counterweight run at the same level, check the car and the upper counterweight elevator guide shoe. Back and forth to both sides of the car or counterweight framework, you can check the size of the backlash and wear boots lining, but also to check the hard and soft spring. If the headspace is too large, you can remove the boots lining in the top surface of the gasket adjustment. Backlash is too large, if it is embedded chip Shoe lining, can be screwed into the side of the shoe lining bolt adjustment backlash. Integral boots gasket on the back side of the boots lining lining can be adjusted so that the gap * side is slightly larger, but because of structural reasons, the effect is not as good as the embedded chip, so the best way is to be replaced with new boots lining.
Check the elevator guide shoes and the car frame, re-frame fastening, preferably with spring washers to prevent loosening of the nut.
3) Shoe lining badly worn, the gap is too large or install skew, cause the car with "chew Road" phenomenon. "Bite the Road" phenomenon following signs to determine: a narrow and bright side of the rail traces, traces on with serious glitches; boots lining the side speakers and glitches; car driving, especially at the start of peace layer deviate pendulum. "Bite the Road": rails twisted, crooked or loose; installation of the upper and lower elevator guide shoes is not, and is inconsistent with the guide clearance; deformation of the car frame or shoe seat loose bolts; Dimensions lined boots too small boots head shaking.
4) always pay attention to rail lubrication, timely removal of dirt inside the boots lining. Guide face of the sliding elevator guide shoes required cleaning, refueling once a week, and cleaned once a year. If automatic refueling device with HJ-40 lubricating oil, no automatic refueling device with calcium-based grease. Rolling elevator guide shoes the rail face without lubricants, but its face to be cleaned, the wheels in the operation should not be obvious slippage. Rolling elevator guide shoes bearing monthly Note calcium grease, cleaning once a half year.

Xi'an YuanQi Elevatorparts Company: elevator guide rail

Xi'an YuanQi Elevatorparts Company: elevator guide rail: The elevator guide rail is divided into three categories: solid rail, heavy hollow rail and escalator rails. The solid guide rail is a m...

elevator guide rail

　　　The elevator guide rail is divided into three categories: solid rail, heavy hollow rail and escalator rails.
The solid guide rail is a machined rail by the rail profiles made ​​by machining the guide surface and the connecting portion, and its purpose is to provide a guide for the operation of the car in the elevator operation, the small size of the solid guide rail for redirection. Many solid rail specifications, weight per meter can be divided into: 8K, and 13K, 18K, 24K, 30K, can be divided into the rail bed width of T50, T70, T75, T78, T82 is, T89, T90, T114, T127, T140 and so on.
With the improvement of people improved comfort requirements of elevator and elevator speed, high-precision guide rail production development direction to improve all aspects of accuracy, precision guide is based on common rail, such as the size of the guide surface tolerance, rail height the tolerances, tongue and groove symmetrical tolerance from 0.1mm into 0.05mm, and increase the number of end geometric tolerance requirements and improve rail straightness distorted requirement. The precision guide is to use a guide rail in a high-speed elevator, not only with higher accuracy than the common rail, and also processes eliminate rail potential bending and distortion factors adequate aging treatment, for example, before machining of the guide surface on the rail profiles, sufficiently aging treatment in order to reduce residual stress within the rail profiles, in the size of the processing end portion before and fine Siaocian again fully release the internal stress, in order to reduce the stress caused by the rail after installation rail curved.
Heavily hollow rail is cold-formed rolled rail, multi-channel pass mold cold-formed molding by volumes plate after, mainly used for the elevator is running for re-provide guidance. Hollow rail per meter Weight to divided into TK3, TK5, the rail end shape can be divided into straight edge and cuffs, of that TK5 and TK5A.
Escalator rail is cold-formed rolled rails, is mainly used for escalators and moving sidewalks rung support and guide. Each escalator companies need to use a variety of cross-sectional shape of the escalator rail according to their own design, that use own escalators rail standards.

Xi'an YuanQi Elevatorparts Company: schindler elevator parts

Xi'an YuanQi Elevatorparts Company: schindler elevator parts: Schindler Elevator Parts traction drive Schindler elevator parts traction wheel drive components. Schindler Elevator Parts rope suspension ...

schindler elevator parts

Schindler Elevator Parts traction drive Schindler elevator parts traction wheel drive components. Schindler Elevator Parts rope suspension sheave, one end of the suspension cab Schindler Elevator accessories, the other end of the suspension counterweight by Schindler Elevator accessories, wire rope and Schindler elevator parts traction wheel generated by the friction of the traction drive car of the Schindler Elevator accessories for running up and down.

Schindler Elevator Parts traction calculation

Schindler elevator parts traction sheave grooves can produce effective traction is the coefficient of friction between the rope and the sheave groove Schindler Elevator parts and Schindler Elevator accessories the wire rope bypassing Schindler elevator parts traction wheel package The function of the angle.

2. Measures to improve traction Schindler Elevator accessories

change the shape of the rope groove and rope groove material to increase the coefficient of friction.

b increasing the wrap angle

c. increase Schindler Elevator accessories car weight

3. Roping

Schindler elevator parts traction rope roping depends largely on the position of the traction unit, the car of the Schindler Elevator accessories rated load and rated speed conditions. Determine roping should be considered in the selection, has a higher transmission efficiency, reasonable energy consumption, and beneficial to extend the life of the rope Schindler accessories.

Schindler Elevator Parts traction sheave rope groove wear the reasons

Rope life factors affect Schindler Elevator accessories generally also affect the life of the Schindler elevator parts traction wheel, there follows several factors:

a Schindler Elevator Parts traction sheave

b. Schindler Elevator Parts rope structure, material, its physical properties

car running height of c. Schindler Elevator Parts

d. loads

e. Schindler Elevator traction machine accessories and other technical parameters of the components

f. environment and maintenance

Xi'an YuanQi Elevatorparts Company: SCHINDLER elevator brake W163

Xi'an YuanQi Elevatorparts Company: SCHINDLER elevator brake W163: Check the brake shoe should fit tightly to the the Schindler Elevator brake  W163  wheel brake surface, when disengaged, the brake shoe sho...

SCHINDLER elevator brake W163

Check the brake shoe should fit tightly to the the Schindler Elevator brake W163 wheel brake surface, when disengaged, the brake shoe should leave Schindler Elevator brakes brake wheel surface without local friction, when a gap formed between the wheel and the brake shoe in the brake braking Schindler shall not be greater than 0.7 mm.

Schindler brake-shaft must be able to automatically rotate and often with a thin oil lubrication, the electromagnet in the job, touch iron should be able to slide freely, without jamming.

Schindler Elevator brake W163 solenoid coil wiring should be no loosening, the coil external short-circuit proof insulation.

Schindler Elevator brakes brake shoe pad if greasy to remove the cleaning, to prevent slipping.

Schindler Elevator brakes brake wheel gap increases when the brake shoe pads wear, the brake is not normal. When abnormality occurs percussion, should be adjusted to the movable core, a nut connected with the brake shoe arm, to compensate for the thickness of the wear out, so that the clearance recovery.

When the brake shoe pad wear value than 2/3 of the liner thickness, should be replaced.

Schindler Elevator brake W163 spring every once in a while to adjust their spring force to lift full load decline should be able to provide sufficient braking force of the car quickly stop bit, full load rises brake can not be too fierce to be smooth from leveling speed the transition to the and accurate stop layer to want to stop floor surface.