Induction heating apparatus

Details Induction heating apparatus Induction heating apparatus

1983-11-29

1985-09-10

Envall, Jr., Roy N.

Electric heating

Metal heating

Of cylinders

219 1049R, 363 21, H05B 664, H05B 102

Patent

active

045408661

ABSTRACT:
An induction heating apparatus which is adapted to stop heating when a load is abnormal and adjust the time period of turning on a switching element of an inverter circuit including an induction heating coil for the load to thereby adjust the input power for heating or the input power for the inverter circuit, so that the signal for controlling the switching element to be on-off is compared with the input of the load or the input of inverter circuit, thereby discriminating normality and abnormality of the load on the basis of the comparison results. Hence, the comparison is carried out under the reference corresponding to the intensity of the input to the load or the input to the inverter circuit, thereby enabling the rapid and reliable detection of abnormal load.

REFERENCES:
patent: 4210792 (1980-07-01), Higuchi et al.
patent: 4211912 (1980-07-01), Kiuchi et al.
patent: 4352000 (1982-09-01), Fujishima et al.
patent: 4356371 (1982-10-01), Kiuchi et al.
patent: 4438311 (1984-03-01), Tazima et al.
patent: 4467165 (1984-08-01), Kiuchi et al.

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