davidsrsb wrote:I had a look at the Valhalla schematic on this site and now would not recommend it. For all the complexity, all it does is generate 85Vac for one winding and drive the other through a 220nF phasing capacitor (with a 68V zener + 12k shunt to guarantee harmonics).
This means the drive to the second winding is a different voltage and probably not 90 degrees out of phase. This is a crazy design, full of lethal voltages and one electrolytic going short away from putting 320V dc across your motor.
They seem a pretty successful power supply for all its design issues,never heard of one fry a motor,have heard of some components failing due to age/heat