A High Power Density, High Voltage Power Supply For A Pulsed Radar System

Abstract

waveform oscillating at the L-C resonant frequency [ 11. Figure 1 shows an equivalent circuit of the resonant tank . A 37 kW, 30 kV DC-DC converter has been built and tested for a pulsed microwave radar tube application. The converter utilizes IGBT transistors in a series resonant DISCRETE DISCRETE LEAKAGE PARASITIC topology to achieve a power density of 4 kWkg pulsed, and 2.6 kWkg average. The converter operates from an input voltage of 30 kV. A resonant frequency of 70 kHz was selected to minimize transformer mass while maintaining a converter efficiency in excess of 92%. A voltage regulation of _. +0.25% has been achieved through the use of an offset comparator and a pulse modulation control system. The theory of operation, circuit topology and test results are given in this paper. TRANSFORMER TRANSFORMER