| 摘要 |
PURPOSE:To prevent the vibration of a DC voltage in a power converter by providing a device for detecting the vibrating component of an input voltage of the converter and so feeding back the output signal of the device as to increase the output of the power converter. CONSTITUTION:A voltage detector 15 for detecting the vibrating component of a DC voltage and a filter circuit 16 having band-pass characteristic for picking up and outputting only the vibrating component of the detected voltage are provided. The output signal of the filter circuit 16 is applied to a reference signal outputted from a current control amplifier 12. The vibrating component of the DC power voltage is additionally fed back, the DC power voltage is thus vibrated to raise the voltage, a ratio becomes large during the ON period of a chopper 4, the power supplied to a load 6 is temporarily increased, and the input current supplied from the power source 1 to the chopper 4 is increased. The rise of the DC power source voltage can be suppressed by the increase of the input current, and the vibration can be suppressed. |
