| 摘要 |
PROBLEM TO BE SOLVED: To balance bearing of load among a plurality of series resonance DC/DC converters, relating to a switching power supply that supplies high voltage to a load. SOLUTION: The switching power supply comprises a plurality of series resonance DC/DC converters SW2 and SW20, transformers T1 and T10 for applying the output voltage from the series resonance DC/DC converter to the primary winding, and rectifier smoothing circuits B1, B2, B10 and B20 for rectifying/smoothing the voltages induced in the secondary windings of the transformers T1 and T10 and supplying the rectified smoothed output voltages from the rectifier smoothing circuits B1, B2, B10 and B20 to a load while adding in series; a common-mode choke coil CM for mutually coupling the output currents from one and the other series resonance DC/DC converters magnetically is provided between the series resonance DC/DC converters SW2, SW20 and the primary windings of the transformers T1, T10. COPYRIGHT: (C)2009,JPO&INPIT
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