Electric heating – Inductive heating – With power supply system
Patent
1992-03-26
1994-07-19
Reynolds, Bruce A.
Electric heating
Inductive heating
With power supply system
219660, 219664, 363 97, 323262, H05B 606
Patent
active
053311272
ABSTRACT:
A dual push-pull induction heating drive circuit comprises an oscillation triggering control circuit regulating the ON-OFF switch of the circuit activation, a switching logic circuit bringing about two exclusive pulse signals serving to drive via an amplifying circuit a dual push-pull switching output circuit having two power elements connected to an induction coil, a pulse width modulating circuit having a controlled comparing element capable of sending out adjustable pulse, and a synchronous detection comparing circuit having at least a comparing element and having an input end in communication with an induction coil and another input end connected with a power source and further having an output end connecting with the switching logic circuit and sending out synchronous pulse signals to a differentiation circuit to bring about synchronous differentiation pulse signals, which are received by the pulse width modulating circuit so as to generate the power control pulse signals serving via the switching logic circuit and the amplifying circuit to drive alternately the two power elements so as to cause the induction coil to bring about high frequency oscillation.
REFERENCES:
patent: 4358654 (1982-11-01), Estes
patent: 4426564 (1984-01-01), Steigerwald et al.
patent: 4473732 (1984-09-01), Payne
patent: 4560851 (1985-12-01), Tsukamoto et al.
patent: 4698743 (1987-10-01), Onodera et al.
patent: 4749836 (1988-06-01), Matsuo et al.
patent: 4847746 (1989-07-01), Rilly et al.
Hoang Tu
Reynolds Bruce A.
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