Heater control apparatus and method

Details Heater control apparatus and method Heater control apparatus and method

2006-01-10

2006-01-10

Pashall, Mark (Department: 3742)

Electric heating

Heating devices

With power supply and voltage or current regulation or...

C219S497000, C219S481000, C219S501000, C323S235000, C323S908000

Reexamination Certificate

active

06984810

ABSTRACT:
A heater control is performed without problems when a normal detection of a power source frequency cannot be performed. A heater control apparatus is configured and arranged to be operable by an alternating current having one of a plurality of frequencies. The heater control apparatus detects a zero-cross point of a voltage waveform of the alternating current to be supplied to a heater so as to generate a zero-cross signal and controls an electric power supply to the heater by using the zero-cross signal as a reference. At a time of tuning a power on, the frequency of the alternating current is tentatively determined before the frequency is detected so as to control the electric power supply to the heater based on the tentatively determined frequency, and to control the electric power supply to the heater, after the frequency of the alternating current is detected, based on the detected frequency.

REFERENCES:
patent: 4809039 (1989-02-01), Ishii
patent: 5493485 (1996-02-01), Okado
patent: 5724615 (1998-03-01), Ishii
patent: 5793623 (1998-08-01), Kawashima et al.
patent: 6034790 (2000-03-01), Kamei et al.
patent: 6507167 (2003-01-01), Han et al.
patent: 1 209 541 (2002-05-01), None
patent: 5-35012 (1993-02-01), None
patent: 2000-322137 (2000-11-01), None

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