What conditions would cause a motor to experience locked rotor condition? I understand starting in-rush is an example, but are there any other times? The reason I ask is because I am looking at the loading profile for some motors that are fed from a generator, and I want to understand the worse case impacts. Since the motors are VFD driven, there is no additional starting in-rush. But what if there is a locked rotor condition? What would cause the motor to stall in this case? If it does stall, would the VFD turn off and disconnect the motor? I want to ensure this doesn't put a huge load on the generator in this scenario.
VFD and Locked Rotor Current
- Thread starter minesh21
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Depends on how the VFD is configured/programmed. Most likely it would trip on overcurrent without overloading the genny.
ron
Senior Member
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The VFD provides isolation between the Gen and the motor. The DC bus acts like a interface point.
Generally, unless there is a bypass, whatever happens at the motor, doesn't get passed up to the AC side in the same magnitude.
Generally, unless there is a bypass, whatever happens at the motor, doesn't get passed up to the AC side in the same magnitude.
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