Small load detection by comparison between input and output para

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

1980-11-10

1982-10-26

Reynolds, B. A.

Electric heating

Metal heating

Of cylinders

219 1049R, 363 97, 363 21, 323277, H05B 608, H05B 612

Patent

active

043563716

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 inadvertently placed small utensil objects from being excessively heated.

REFERENCES:
patent: 4016392 (1977-04-01), Kobayashi et al.
patent: 4074101 (1978-02-01), Kiuchi et al.
patent: 4180768 (1979-12-01), Ferraro
patent: 4183082 (1980-01-01), Ishii
patent: 4277667 (1981-07-01), Kiuchi

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