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Resonant PWM inverter linked DC-DC convertor using parasitic impedances of high-voltage transformer and its applications to X-ray generator

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3 Author(s)
Hino, H. ; Hitachi Med. Corp., Chiba, Japan ; Hatakeyama, T. ; Nakaoka, M.

A description is given of a resonant DC-DC converter that uses both the leakage inductances and stray winding capacitances of a high-voltage transformer as LC resonant components and the input capacitance of high-voltage cables as a smoothing DC capacitor. The converter incorporates a pulsewidth-modulated (PWM) control based on a high-frequency inverter at constant frequency to adjust output over a wide range of loads, Its application to an X-ray generator power supply system is reported. A computer-aided state-variable analysis of the circuit is presented. Experimental results using a prototype transformer are given, covering output voltage control characteristics, maximum output power, and converter output waveforms in the X-ray generator.<>

Published in:

Power Electronics Specialists Conference, 1988. PESC '88 Record., 19th Annual IEEE

Date of Conference:

11-14 April 1988