| 摘要 |
A converter section (5) in an inverter (2) includes a current limiting resistor (R) connected in series with a smoothing capacitor (C). A diode (20) is connected between the resistor (R) and the capacitor to bypass a regenerated current from a motor (3), etc., to the capacitor (C). The smoothing capacitor (C) has small capacitance, and the ripple current flowing to the capacitor (C) is limited by the resistor (R).
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