Small load detection by comparison between input and output...

Details Small load detection by comparison between input and output... Small load detection by comparison between input and output...

H - Electricity

05

B

327/26

H05B 6/06 (2006.01) H05B 6/12 (2006.01)

Patent

CA 1167935

TITLE "SMALL LOAD DETECTION BY COMPARISON BETWEEN INPUT AND OUTPUT PARAMETERS OF AN INDUCTION HEAT COOKING APPARATUS" ABSTRACT An induction heat cooking apparatus includes an inverter which generates ultrasonic frequency energy for heating a magnetic load by induction, and a small load detection circuit. The detection circuit includes a comparator which compares the input and output parameters of the inverter and latches a bistable device when the input power is smaller than the output parameter. The bistable device shuts down the inverter to prevent in- advertently placed small utensil objects from being ex- cessively heated.

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