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Recommendation? Is this motor suitable for 2x72 Belt Grinder?
- Thread starter Jakeo26
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- Oct 31, 2009
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Do you have 3 phase power? Otherwise, you will also need a phase converter and that probably costs just as much as an appropriate single phase motor.
Hi, just found this motor for dirt cheap and was wondering if it is adequate for a belt grinder. It says 400V but that can be changed to 240Volts through a VFD right?
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- Apr 11, 2016
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If he plans to use a VFD, that will act as the phase converter, as long as it is either 1) a model specifically designed for single-phase input, or 2) a 3-phase VFD oversized enough to run properly on single-phase input.
OP, if you only have 240V single-phase power available, you can't increase that to 400V through a VFD. You would need to also have a step-up transformer to increase from 240V to 400V, then go into a 400V VFD. You could try it without the transformer, but would only be able to run the motor up to about 60% speed...above that you'd run out of voltage and lose torque. But maybe that would be enough? If not, I would abandon that motor and search for one that is 240V. Also, pay attention to the RPM. That one appears to be 14xx RPM, which means it is a 4-pole motor. A 2-pole motor will have twice the RPM, which may sound great in theory, but they also have half the torque as a 4-pole, so may not work as well as expected.
Also, this would probably be better posted in the Knife Maker's shop talk forum.