H - Electricity – 05 – B
Patent
H - Electricity
05
B
327/19, 327/26
H05B 6/04 (2006.01) H05B 6/06 (2006.01)
Patent
CA 1095597
ABSTRACT OF THE DISCLOSURE: An induction heating cooking apparatus includes solid state switching device interposed between a current source of low frequency and a load circuit, and a control circuit for triggering the switching devices to generate power of high frequency oscillation in the load circuit to produce heat in an inductive cooking ware by electromagnetic induction. The control circuit comprises: a zero crossing detector for detecting a zero crossover point of said high frequency oscillation, circuit for developing a first signal representative of power delivered to the cooking ware, circuit for establishing a setting level to represent a desired power level, comparator circuit for developing a second signal representative of the deviation of the first signal from the setting level, and circuit for determing the interval between successive triggering actions of the switching devices from the detected zero crossover point in accordance with the magnitude of the second signal to control the amount of power delivered to the cooking ware at the desired power level.
269639
Keizo Amagami
Kiuchi Mitsuyuki
Mizukawa Takumi
Saka Tatsuo
Yoshida Hirokazu
Matsushita Electric Industrial Co. Ltd.
Robic Robic & Associes/associates
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