Power supply for a magnetron having controlled output power and

Details Power supply for a magnetron having controlled output power and Power supply for a magnetron having controlled output power and

1995-10-30

1997-06-24

Wong, Peter S.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363132, 363 98, 315106, H02M 3335

Patent

active

056422687

ABSTRACT:
A power supply for a magnetron generating a DC output having a low voltage ripple content at the power supply output for energizing the magnetron. The power supply includes a voltage and current controlled regulator circuit transmitting an output signal having a voltage level and current level established according to the voltage across the magnetron and the current flowing through the magnetron. The ripple content of the power supply output is less than approximately 5-7% and causes the magnetron to operate in a relatively narrow bandwidth of approximately .+-.5 Megahertz. In one embodiment, an output of an induced sawtooth waveform is generated by turning on and turning off an AC supply to the power supply circuit to induce a ripple voltage for causing the magnetron to enter the correct operating frequency. In another embodiment, a regulator circuit generates a square wave signal having a period of oscillation based on the current flowing through the magnetron. The square wave signal is then converted to a DC voltage and applied to the magnetron to cause the magnetron to enter the correct operating frequency.

REFERENCES:
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patent: 4481447 (1984-11-01), Stupp et al.
patent: 4628284 (1986-12-01), Bruning et al.
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patent: 4777575 (1988-10-01), Yamato et al.
patent: 5003141 (1991-03-01), Braunisch et al.
patent: 5082998 (1992-01-01), Yoshioka
patent: 5222015 (1993-06-01), Nakagawa
patent: 5224027 (1993-06-01), Kyong-keun
patent: 5250774 (1993-10-01), Lee

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