In fact, the problems of the motor are not the cause of the motor itself, most of them are caused by the non-standard debugging of the inverter or the wrong inverter motor when the inverter motor is used, etc., mainly due to the following situations:
1. Use the general motor as a frequency conversion motor
Because the general motor cooling fan is connected with the rotating shaft, when the speed is regulated by the inverter, the speed is unstable, and the additional speed of the motor cannot be reached, and the cooling fan cannot play a normal role, causing poor heat dissipation of the motor; In addition, the general motor is not designed according to the requirements of frequency conversion, so that the motor is heated or incinerated .
2. The inverter motor and the inverter are directly connected together without debugging
The two commonly used methods of inverter control motor are vector control and V/F curve control, each control method must first set the type of motor (synchronous, asynchronous, with or without encoder), additional power of the motor, additional voltage, additional current, speed or number of poles, additional frequency, high operating frequency, acceleration and deceleration time of motor start and stop, maintenance method of inverter control motor and maintenance ratio factor, carrier frequency, etc., all of which are indispensable. Once these parameters are set, you can choose whether you want to control them by vector or V/F. When selecting vector control, the motor should be paired with the inverter with no-load dynamic self-learning or static self-learning with load, and the motor and inverter after self-learning can play the best performance of vector control; When selecting V/F control, there is no need to learn by itself, and the parameters are adjusted and directly energized.
3. The running direction of the fan of the variable frequency motor is inconsistent with the direction of rotation indicated on the fan, and the fan cannot play a role, causing the heat dissipation of the motor to deteriorate, and the heat generated by the motor cannot be released, causing the motor to heat up or incinerate.
4. 2 or 3 of the above three conditions occur more often
In view of the above situation, it is recommended that customers choose the inverter to control the motor, to select the inverter motor, the inverter to select a good quality manufacturer, although the initial investment is a little higher, but the quality is guaranteed, the operation time is long without problems, it is not easy to cause the motor or inverter defects caused by the shutdown, etc., and the quality of the inverter after-sales service is guaranteed, the response time is fast.
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