High frequency heating system with changing function for rated c

Details High frequency heating system with changing function for rated c High frequency heating system with changing function for rated c

1989-02-15

1990-02-13

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1055M, 219 1077, 363 21, H05B 668

Patent

active

049008854

ABSTRACT:
A high frequency heating apparatus includes a high frequency heating source for outputting a predetermined maximum rated high frequency output. An inverter circuit receives an AC input and supplies a predetermined high frequency drive power to the high frequency heating source. A switch manually changes and outputs a plurality of rated consumption power change signals including at least two levels corresponding to the maximum rated high frequency output of the high frequency heating source and at least one high frequency output lower than the maximum rated high frequency output, associated with a rated consumption power of the apparatus. A controller controls the high frequency drive power from the inverter circuit in accordance with the rated consumption change signal from the switch. The high frequency output from the high frequency heating source and the rated consumption power of the apparatus are linearly, variably set in accordance with the rated consumption power change signal.

REFERENCES:
patent: 4002875 (1977-01-01), Kiuchi et al.
patent: 4349777 (1982-09-01), Mitamura
patent: 4456807 (1984-06-01), Ogino et al.
patent: 4467165 (1984-08-01), Kiuchi et al.
patent: 4533810 (1985-08-01), Harmon et al.
patent: 4540866 (1985-09-01), Okuda
patent: 4580025 (1986-04-01), Carlson et al.
patent: 4724291 (1988-02-01), Inumada
patent: 4777575 (1988-10-01), Yamato et al.

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