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...