For a 75KW motor, the rated current is 140 amps; it can drop to 90 amps, and then the motor’s speed decreases – I’m not sure why
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A 75KW motor is connected to a 75KW frequency converter; when the load increases, the current rises to 90A and the motor’s speed drops. When the load is reduced to 70A, the motor operates normally. Is it the issue that the motor’s power isn’t 75KW, or is it a problem with the frequency converter?
It’s probably due to incorrect parameter settings of the inverter. Check the inverter parameters!
Check the inverter parameters. For example, whether the current protection setting of the inverter is correct.
1: For typical load types, the output frequency of the inverter (i.e., the motor speed) is controlled by the set process parameters; the inverter adjusts its output frequency based on the feedback signals from various transmitters present on site. 2: For constant-power loads, the inverter adjusts the output frequency in response to changes in load torque in order to maintain a constant output power.