System and method for power conversion

Abstract

A polarity-selectable high voltage direct current power supply including a first drive assembly that transforms a first low voltage DC input into a first medium voltage alternating current output; a first HV output assembly that transforms the first LV AC output into a first HV DC output, wherein the first HV output assembly defines a first input stage; a polarity selector coupled between the second output junction of the first drive assembly and the first and second input stages of the first HV output assembly, the polarity selector operable between a first configuration and a second configuration; wherein in the first configuration the first HV DC output has a positive polarity; and wherein in the second configuration the first HV DC output has a negative polarity.

What is claimed is: 
     
         1 . A power supply comprising:
 a first power source configured to output a positive polarity direct current (DC) voltage;   a second power source configured to output a negative polarity DC voltage;   a drive assembly configured to receive a first DC voltage and output an alternating current (AC) voltage;   an output assembly electrically coupled to the drive assembly and a plurality of loads, wherein the output assembly is configured to transform the AC voltage into a second DC voltage;   a polarity selector coupled between the first and second power source and the drive assembly, the polarity selector operable to modulate a polarity of the second DC voltage;   a feedback circuit electrically coupled to the output assembly and operable to detect a parameter of the second DC voltage at the plurality of loads; and   a controller connected to the feedback circuit, wherein the controller is operable to transmit signals to the drive assembly or the output assembly to control an output characteristic of the second DC voltage, based on the parameter.