Magnetron variable power supply with moding prevention

Details Magnetron variable power supply with moding prevention Magnetron variable power supply with moding prevention

1995-04-27

1996-11-05

Leung, Philip H.

Electric heating

Microwave heating

With control system

219717, 219761, 331 91, 315106, 315107, 363 21, H05B 668

Patent

active

055714390

ABSTRACT:
A power supply for a magnetron varies a power output level and prevents moding of the magnetron. To provide a variable power output, a microprocessor senses an anode current and voltage of the magnetron. Based on the sensed signals, the microprocessor adjusts the conduction angle of a thyristor to obtain the desired power level. The microprocessor also monitors the anode voltage for detecting moding of the magnetron. If moding is detected, the microprocessor adjusts the conduction angle of another thyristor to change the current supplied to the filament. By changing the filament current, the microprocessor effectively prevents the moding of the magnetron.

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