| 摘要 |
<P>PROBLEM TO BE SOLVED: To materialize the reduction of harmonic currents and the improvement of an input power factor in simple structure, in a rectifier circuit of three-phase input. <P>SOLUTION: In a rectifier circuit, which includes a first bridge rectifier circuit 5 that is connected with three-phase AC power sources 1 to 4 from a first reactor 2 and a smoothing capacitor 13 that smoothes the DC output of the first bridge rectifier circuit 5, a circuit is connected to a second bridge rectifier circuit 6 via second reactors 7 to 9 from the AC input end of the first bridge rectifier circuit 5, and it is equipped with capacitors 10 to 12 between individual terminals at the AC input end of the second bridge rectifier circuit 6, and the DC output end of the second bridge rectifier circuit 6 is connected in parallel with the DC output end of the first bridge rectifier circuit 5, whereby it becomes possible to reduce harmonic currents and to improve the input power factor in simple structure. <P>COPYRIGHT: (C)2009,JPO&INPIT |
