PHASE CONTROLLING DEVICE AND FUSER CONTROLLING DEVICE HAVING THE SAME AND METHOD OF THE PHASE CONTROLLING

摘要

The phase control apparatus and a fixing unit control apparatus and method having the same phase control to achieve the reduction of manufacturing cost is provided. The phase control device is a pulse generator for generating a sawtooth wave pulse by time change for the first signal generation unit, a half cycle of the AC power supply to generate an error signal corresponding to the difference between the current temperature of the target temperature and the fixing unit of the fixing device, and It comprises error signal and a control signal generator for outputting a phase control signal for controlling the phase of the AC power supply by comparing the saw-tooth pulse. Compared to the pulse generator for generating a pulse generation unit for generating reduced to increase the saw tooth pulses which have saw tooth pulse circuit structure can be simplified and to reduce the production cost of the phase control apparatus and a fixing unit control apparatus. ; Phase control, sawtooth, PWM, unipolar power, soft start, over-current