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A: 1 check whether the input voltage is high, adjust the voltage to the normal range (380V ± 15%), so that the DC bus voltage is not higher than 800V.
2. Check whether the parameters of the VFD are set correctly or whether the auto-tuning parameters of the motor are correct. If not, please change the correct parameters according to the actual situation.
3. Check whether the acceleration time is too short, and appropriately extend the acceleration time if conditions permit.
4. Whether the VFD drives the motor with external force during acceleration. If there is external force driving, try to cancel the external force or install braking device.
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