PM motor current
PM motor current
(OP)
Please advise: for VFD system (unity PF at AFE) with PM synchronous motor - how to estimate total power/current consumed from the grid when the motor is spinning up to max speed with no shaft load.
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RE: PM motor current
Keith Cress
kcress - http://www.flaminsystems.com
RE: PM motor current
RE: PM motor current
But with VFDs, why not just set the drives to ramp up at a current limit that the transformer will support.
The question now is, how does supply current correlate with motor current at lower speeds?
But, how are you going to dissipate the absorbed energy?
If you are going to regenerate into the grid, the full load is what you should size your transformer for, not the no load acceleration.
Bill
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RE: PM motor current
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RE: PM motor current