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VFD DC bus input Answered

So I've heard it is possible to use a high voltage DC input with a 3 phase motor controller, but I haven't really found much info or instructions on how to modify them to be able to take a DC current. I am interested in this because I want to experiment with building an electric vehicle and a industrial motor. I bought a cheap, used VFD and a motor to experiment with, but it would be great to have some info and tips on how to go about doing this!

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ANDY!

5 years ago

I just received the VFD in the mail and found the rectifier. Now I need a 400 DC source to test it out!

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steveastrouk

5 years ago

Presumably, at the front end, there will be a rectifier and diode to create high voltage DC from the usual incoming AC. Strip the bits out that do that, and you should be good to go.

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mpilchfamily

5 years ago

Yes it's doable but you need a driver circuit that is able to power each coil in the motor one at a time in rapid succession to get the motor spinning. The RPM of the motor will be limited to how fast the driver can cycle through the coils.