Importance

Loading Importance Indicators...

Abstract

A heater controller that ensures required characteristics and operation for a control rectifying element even in a freezing environment. The control rectifying element is for connection to a heater and an AC power supply for supplying AC voltage to the heater, in which the control rectifying element controls the supply of AC voltage to the heater. The control unit outputs a pulse signal for serving as a trigger for holding the control rectifying element in an activated state based on a zero-cross timing of the AC voltage. When the control rectifying element is not held in the activated state by the pulse signal output from the control unit at the zero-cross timing, the control unit delays the output of the pulse signal from the zero-cross timing while keeping the pulse width of the pulse signal constant until the control rectifying element is held in the activated state.

Loading the Abstract Image...

First Claim