twin motor phase converter
BQ340 fired this volley in news:523799df$0$63180
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no plug-reversing motors with VFD's for one
That's a matter of planning, rather than a specific advantage or
disadvantage. The application matters.
VFD's decelerate then re-accelerate when switch-reversed.
RPCs do it more rapidly, but NOT instantly, which might be wanted in some
applications. They also severely stress everything while doing it.
Lloyd
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