Power supply apparatus and printing apparatus

摘要

The power supply includes a transformer for generating a first output voltage by a first secondary winding, and a superimposing voltage by a second secondary winding, and a driver. Furthermore, the circuit includes first and second rectifying and smoothing circuits for respectively rectifying and smoothing the first output voltage and superimposing voltage, and an adder for adding the rectified and smoothed superimposing voltage on the rectified and smoothed first output voltage to output a second output voltage. The first and second output voltages are fed back respectively by DC coupling, the fed-back first and second output voltages are respectively adjusted by first and second feedback factors, and the adjusted feedback components are combined and amplified to be applied to the driver for PWM-control.

主权项

1. An apparatus comprising:
a generation unit having a first portion constructed to generate a first voltage and a second portion constructed to generate an adding voltage; a drive portion constructed to drive the generation unit; a first output unit constructed to output the first voltage; a second output unit constructed to output a second voltage obtained by adding the first voltage and the adding voltage; and a feedback control unit constructed to compose a first feedback component obtained by adjusting the first voltage outputted by the first output unit by a first feedback factor and a second feedback component obtained by adjusting the second voltage outputted by the second output unit by a second feedback factor, and to PWM-control the drive unit, based on a composed feedback component obtained by composing the first feedback unit and the second feedback unit.