Journal Article 位相シフト制御を適用した高周波サイクロコンバータ

米田, 昇平  ,  Komeda, Shohei  ,  藤田, 英明  ,  Fujita, Hideaki

136 ( no. 6 )  , pp.433 - 440 , 2016-06 , Institute of Electrical Engineering in Japan , 電気学会
This paper proposes a new control method for a high-frequency cycloconverter consisting of two half-bridge inverters and a series-resonant circuit. This cycloconverter acts as an ac-to-ac direct power conversion circuit without any dc stage. This circuit does not require a diode bridge rectifier, and thus, can be used to reduce forward voltage drops and power losses in the diodes. A new phase-shift control method is proposed to regulate the capacitor voltage in each half-bridge inverter and to achieve zero-voltage switching. The proposed phase-shift control is theoretically discussed and is also verified by an experimental circuit consisting of super-junction power MOSFETs. As a result, the proposed high-frequency cycloconverter exhibits a good power conversion efficiency as high as 97.7% at the rated power of 1.3kW.

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