Patent ID: 9425706
Filing Date: 2016-08-23
CPC Classification: H02M

Claim Text:
1. A control system for a circuit including a DC supply, a DC-AC inverter of the type having a plurality of solid state switches, a DC-DC converter between the DC supply and the DC-AC inverter, and an AC output from the DC-AC inverter, wherein when a load is applied to the AC output, positive, negative and total voltages are measurable at the input of the DC-AC inverter, characterized by: a feedback loop connected between an input of the DC-AC inverter and an input of the DC-DC converter, and a controller configured to compare the positive, negative and total voltages to predetermined levels, obtain error voltages from the comparison, and select one of the error voltages to apply to the input of the DC-DC converter in the feedback loop that will minimize distortion of the AC output.