高周波リンク非共振形コンバータのソフトスイッチング化

概要

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The static power converters based on power-electronic technology, such as inverters for fluorescent lights or airconditioners, are spreading in our daily life. However, the emission noise and conduction noise due to their switching operation caused a problem of EMI (Electro Magnetic Interference). This paper presents an application of soft switching technique to reduce EMIin the high-frequency link converter which is one of the most promising circuit configurations for UPS (Un-interruptible Power Supply) or solar battery systems. The basic idea is that every switching operation of the converter can be made in the soft switching mode if the loss-less snubber and the natural commutation phase angle control techniques are both applied to input-inverter and output-cycloconverter stages, respectively. The principle, the accompanying technical problem of parasitic resonance and its countermeasure are mentioned. Validity and availability of the proposed method are shown through experimental results obtained in the prototype system.
1995-01-31