| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an AC power supply device, a charging device, and an image forming device capable of reducing power consumption by suppressing a DC electric potential between a normal rotation and inversion of a BTL output by a simple configuration. <P>SOLUTION: According to the present invention, an AC power supply device which drives a transformer and outputs alternating voltage, comprises: a triangular wave generation part 205; a sine wave generation part 206 which generates a sine wave having an offset amplitude; a comparator 207 which generates a PWM signal on the basis of the sine wave by the sine wave generation part 206 and the triangular wave by the triangular wave generation part 205; a LPF 202 which restores a normal rotation signal and inversion signal of the PWM signal each to a sine wave and output; and an electrolytic capacitor 261 which is provided between a normal rotation output side of the LPF 202 and a transformer 203, and removes a DC component corresponding to an offset of an sine wave amplitude. <P>COPYRIGHT: (C)2012,JPO&INPIT |
