Heater driving device for supplying AC power to a heater
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United States of America Patent
Stats
-
May 21, 1996
Grant Date -
N/A
app pub date -
Mar 11, 1993
filing date -
Mar 16, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A heater driving device for supplying AC power to a heater of a fixing device of an image forming apparatus. The heater driving device has self arc suppression type elements between an AC power source and the heater for controlling supply of AC power to the heater in accordance with a control signal supplied to the self arc suppression type elements. The control signal is obtained by modifying signal voltage corresponding to the temperature of the heater in accordance with an absolute value signal which is generated by reducing AC power and converting the reduced AC power to an absolute value, and then comparing the modified signal voltage and a pulse signal generated by a triangular wave oscillator.
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