| 摘要 |
The present invention provides a soft switching power converter that turns the switching operations of the semiconductor elements used for all the switching into soft switching operations with the use of a magnetic energy recovering switch that has a small-capacity magnetic energy storing capacitor connected between DC terminals of a bridge circuit formed with at least two reverse-conduction semiconductor switches. A high-frequency boost pulse voltage generated by the magnetic energy recovering switch is regarded as the voltage of a DC link portion. The soft switching power converter converts the voltage into DC or AC of arbitrary low frequency through a filter or a switching control unit. With this structure, the switching operations of the semiconductor elements used for all the switching are turned into soft switching operations. Accordingly, the power converter is capable of boosting or lowering the output voltage, and serves as a reversible power converter that is formed with a relatively small number of components and a simple control unit.
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