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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 deceleration time is too short, and appropriately extend the deceleration time if conditions permit.
3. Check whether the inertia of the load is too large, or there is an external force to drag the motor during the acceleration of the load. If so, cancel the external force or change to coast stop.
4. Or try to install braking devices.
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