| 摘要 |
<p>The invention provides a three-phase rectifying device. The three-phase rectifying device enables a power factor to be improved and the high-frequency switch noise superposed on an input current to be reduced, so that N1 times of short circuit occur discontinuously between a mutual connecting point of two diodes of series circuits in a rectifying circuit and a negative side output end of the rectifying circuit, and at the front edge side of a phase which comes from a three-phase AC power supply and at which the input current becomes a positive level, and at the back edge side of the same phase, N2 times of short circuit occur discontinuously; and N1 times of short circuit occur discontinuously between the mutual connecting point of two diodes of series circuits in the rectifying circuit and a positive side output end of the rectifying circuit, and at the front edge side of a phase which comes from a three-phase AC power supply and at which the input current becomes a negative level, and at the back edge side of the same phase, N2 times of short circuit occur discontinuously. Moreover, according to an input power, the ratio N1/N2 of the times of N1 and N2 is switched.</p> |
