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From: m II on 29 Jun 2010 01:09
Tim Williams wrote:

> First, you need 160-170V supply, not 120, or an 85V winding.


I'm starting to see why the square wave business looked more
attractive at the beginning. There's none of this root 2 stuff to
worry about. With that square wave output, I'd be getting almost 120
volts out, which I don't want to use.

It's not that I hate square waves, you understand..I just don't like
the noise a connected motor makes. I don't want my furnace motor
disintegrating when I need it the most.

I have a cheaper model modified sine wave 3000 watt inverter. I
connected it to a 5kw transformer and the noise made me disconnect it
NOW. The frightening thing was that it was an epoxy potted core in a
metal case and it still made a racket.

I will continue looking for a solution. The only thing I will NOT
consider is a brushed motor. Maybe I can find a transformer with a
wider range of taps.


mike




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