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.