| 摘要 |
PROBLEM TO BE SOLVED: To compensate a delay in drive timing of switching elements having different driving voltages and reducing an even-numbered harmonic components in an input current, with respect to a power supply having a grounding point between two switching elements connected in series across a smoothing capacitor. SOLUTION: A connection point between first and second switching elements Q1 and Q2 connected in serial across a smoothing capacitor EC is used as a grounding point. On the end of a series circuit constituted of an AC power supply (P) and a first inductor L1 and one end of a series circuit made up of a load circuit (Z) and a second inductor L2 are connected to the grounding point. In a structure of a power supply, the switching elements Q1 and Q2 takes power from an AC power supply (P) and concurrently feeds power to the load circuit (Z). Then, in this case at least a means for compensating an asymmetrical input current between positive and negative currents caused by the difference in the drive timings in the switching elements Q1 and Q2 is provided. |
