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IE2 IE3 efficiency and VFDs

IE2 IE3 efficiency and VFDs

IE2 IE3 efficiency and VFDs

(OP)
Dear all,

premium efficiency IE3 async motors will be mandatory next year in many countries (U.S. already by 2011, others later). I wonder if driving an IE2 motor with a VFD will be considered acceptable or not. In my opinion the savings in starting and stopping cycles may justify this approach. I'm not looking for legal advice, just a technical point of view.
Thank you for your suggestions.

RE: IE2 IE3 efficiency and VFDs

Sounds like a politician's solution to a non-problem, to me.  Wonder if anyone has given any thought to the much-higher starting inrush currents these premium efficient motors have.

RE: IE2 IE3 efficiency and VFDs

I should have added that, in view of the apparent lack of technical excellence displayed in the original edict, I doubt anyone in authority has considered the technical aspects of IE2 and IE3 motors on VFD's.

RE: IE2 IE3 efficiency and VFDs

(OP)
Thank you

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