> The LV supply is relatively easy to solve. The problem is 
> the HV supply with
> the high current requirements and the required ripple. 
> What I'm trying to
> avoid somehow is the large capacitor.

You are liable to run into regulatory issues with power 
factor and more. Why do you WANT to reduce the ripple? What 
is it doing that is bad (eg motor hum or vibration or ...?)

Ideally you need to give us as complete as a description as 
possible (and possibly some money from the 360,000 pa sales 
:-) ) for us to be useful.

A "preregulator" would probably help -  either a Triac or 
SCR or a FET in a bridge. The latter is very controllable. 
Power factor wise "lumpy DC" at 2 x mains frequency may be 
best. What does this do to your motor?

More details may lead to better solutions. And may not :-)


        Russell

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