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The frequency converter may also be the cause of the burning of the frequency conversion motor

author:xiaoE date:2021-07-18 11: 37

  As the "new darling" of the equipment manufacturing industry in recent years, the frequency conversion motor has the characteristics of frequency conversion speed regulation, which can achieve the purpose of energy saving in the use of many equipment.

  But remind that the variable frequency motor sometimes burns because of the incorrect setting of the inverter.The following is to sort out and analyze the reasons why the frequency converter burned the frequency conversion speed control motor.

  It may be because the protection function of the inverter for the variable frequency motor is not set.Some parameters of the variable frequency motor must be input into the frequency converter, and at the same time, the relevant parameters of the frequency converter to protect the motor must be set.However, some customers bought the inverter according to the power of the inverter motor, and directly connected the inverter and the inverter motor to run without setting.Since the motor parameters and inverter protection are not set for the motor, the default protection current of the inverter exceeds the rated current of the motor, and the overcurrent caused by the motor overload will not stop the inverter to protect the motor, which will cause the inverter motor to burn.

  The following are some methods of inverter setting compiled by the variable frequency motor factory:

  XNUMX. Setting of protection action and motor type: When one inverter controls only one motor, the overload protection action should be set to be valid; if one inverter controls multiple motors, the inverter overload protection should be set to be invalid. At this time, measures such as thermal relay protection or motor protector protection should be taken according to the capacity of each motor.

  1. Setting of the protection mode: The protection modes available for selection during overload are: (2) Motor decelerates to stop: (3) The motor immediately cuts off and stops freely; (XNUMX) The motor runs with current limit.

  XNUMX. Overload protection delay time: the time allowed to continue running when the overload current reaches the protection setting value, and protection will be implemented if it exceeds the protection value: the protection will exit when the current value returns to the normal value within the delay time; protection will be implemented according to the inverse time limit feature when the overload current exceeds the protection setting value .

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