Method and apparatus for regulating microwave oven power

Details Method and apparatus for regulating microwave oven power Method and apparatus for regulating microwave oven power

F - Mech Eng,Light,Heat,Weapons

24

C

323/34, 327/2.5

F24C 7/02 (2006.01) G05F 1/66 (2006.01) H05B 6/68 (2006.01)

Patent

CA 1199374

METHOD AND APPARATUS FOR REGULATING MICROWAVE OVEN POWER Abstract of the Invention A method and apparatus for regulating a microwave oven to a predetermined output power level. The anode current or a voltage corresponding to it is monitored to provide a signal indicative of the actual output power of the magnetron. Time is divided into a sequence of equal time intervals, each interval corresponding to fixed number of ac line cycles. In accordance with the signal, the number of ac cycles to be supplied to the power supply for each interval to regulate the output power towards the regulated level is determined. The determined number of cycles are supplied by switching at the zero current crossings between the line and the power supply. The switching is executed so that the supplied ac cycles are distributed substantially uniformly over the particular time interval.

413060

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