| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a three-phase power factor improved converter that has high efficiency and can balance the suppression of higher harmonic components of a three-phase current and each phase current. <P>SOLUTION: In the three-phase power factor improved converter, in which three sets 1, 17, and 18 of power factor improved converters having harmonic suppressing functions are connected between each phase of three-phase three-line AC power supplies and the next, common mode choke coils L1, L2, and L3 are connected to the input parts of power factor improved converters 1, 17, and 18, and a rectifier circuit 2 is connected via a choke coil 3 to the output of this common mode choke coil, and DC/DC converters 8, 19, and 20 are connected to the outputs of the power factor improved converters 1, 17, and 18, and the individual outputs of the DC/DC converters 8, 19, and 20 are connected in parallel, and further it has a control circuit 30, which controls the DC/DC converters 8, 19, and 20 by a common output voltage detection error signal. <P>COPYRIGHT: (C)2010,JPO&INPIT |
