PROBLEM TO BE SOLVED: To prevent a LC resonance in a choke-input LC smoothing circuit even if a constant power load is connected.;SOLUTION: The LC smoothing circuit 20 is connected to a prestage of an inverter 14, and provided with a DC reactor 12 and a DC filter capacitor 13 for composing the choke-input LC filter. It is also provided with a resistor 18a connected to the DC reactor 12 in parallel.;COPYRIGHT: (C)2009,JPO&INPIT
展开▼
