AC RIPPLE CURRENT SUPPRESS APPARATUS AND METHOD FOR SINGLE PHASE INVERTER

摘要

PURPOSE: A low-speed ripple current suppressing device is provided to prevent an affect due to a low-speed ripple current by adjusting an output voltage of an inverter appropriately. CONSTITUTION: A power supply part(10) is configured to supply a single-phase AC power. A rectification and smoothing part(20,30) rectifies and smoothes the single-phase AC power. An inverter(40) receives a rectified and smoothed DC voltage from the rectification and smoothing part and outputs a motor drive current for driving a motor(50). A control part(60) compares an envelope detected and a DC component extracted from a ripple current included in an output current of the inverter and controls the output current of the inverter based on a comparison result.