100 kV High Voltage Power Supply with Bipolar Voltage Output and adaptive Digital Control

Abstract— This paper presents a 100kV high frequency transformer / rectifier package which is capable of dual output polarity operation. An H-Bridge inverter drives the primary of the High Voltage (HV) transformer at a frequency of 20 kHz. The inverter is driven by a Microchip dsPIC33F digital signal controller using peak current mode control with adaptive slope compensation. The HV-tank has two HV-coax output cables with a grounded shield on each cable. If the center conductor of the coax cable designated as negative output is grounded, positive voltage is obtained from the coax cable designated as positive output and vice versa. This paper provides design details and experimental results from tests of the entire system.