Quote:
Originally Posted by SteveU
Thanx, that's what I expected. So, assuming rewinding the field is undesirable, we do a buck conversion to produce a low voltage/ high current for the low-z field winding. Since we want a field controller anyway, it comes for ~free. Next question: how bad are the field core AC losses? ie do we need an external choke in series? Probably a good idea for EMC compliance anyway?
... Of course, there are practical limits like the field current must not be too low.
Steve
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I've heard of people trying this with no success. A controller out of Italy (Zappi I believe) tried to achieve regen by separately controlling the field on a series wound motor. They had a lot of problems. I think it is possible, just not practical, but I would love to be proven wrong. In theory it sounds like a good idea.