| 摘要 |
Provided is an AC/AC conversion power supply device including: n(n≧2) rectification circuits (D1 to Dn) connected in series with respect to an AC input; n high-frequency switching circuits (SC1 to SCn) respectively connected to outputs of the rectification circuits (D1 to Dn); and n transformers (TR1 to TRn) each having a primary winding connected to the outputs of high-frequency switching circuits (SC1 to SCn). The transformers (TR1 to TRn) have secondary windings connected in parallel to one another through the rectification circuits (D1 to Dn) and an output switching circuit (SW) for converting the outputs into AC current. The high-frequency switching circuits (SC1 to SCn) include delay circuits (C14, R14; C24, R24) which can delay a waveform of the high-frequency switching signal.
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