Title :
Resonant PWM inverter linked DC-DC convertor using parasitic impedances of high-voltage transformer and its applications to X-ray generator
Author :
Hino, Hirofumi ; Hatakeyama, Takanobu ; Nakaoka, Mutsuo
Author_Institution :
Hitachi Med. Corp., Chiba, Japan
Abstract :
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.<>
Keywords :
X-ray apparatus; circuit analysis computing; invertors; power convertors; power supplies to apparatus; power transformers; pulse width modulation; DC-DC convertor; LC resonant components; X-ray generator; circuit analysis computing; high-voltage cables; high-voltage transformer; leakage inductances; loads; output power; output voltage control; parasitic impedances; power supply system; resonant PWM invertor; smoothing DC capacitor; stray winding capacitances; Cables; DC-DC power converters; Impedance; Parasitic capacitance; Power generation; Pulse width modulation converters; Pulse width modulation inverters; Pulsed power supplies; Resonance; Smoothing methods;
Conference_Titel :
Power Electronics Specialists Conference, 1988. PESC '88 Record., 19th Annual IEEE
Conference_Location :
Kyoto, Japan
DOI :
10.1109/PESC.1988.18264
