共振コンデンサ短絡スイッチを有する部分共振型インバータとその動作特性

概要

論文の詳細を見る
Two frequencies are often used in induction heating, that is, a lower frequency fL for preheating and a higher frequency fH for main heating in order to decrease thermal stress. In this case, each of fL and fH is generated by the different inverter, and fH approximately equals several times to ten times of fL. Then we propose a new quasi-resonant inverter that two-way short-circuit switches across the resonant capacitor. The proposed inverter has features that its operating frequency is adjustable and the frequency range is so wide that the higher frequency can be ten times as much as the lower frequency. It is considered that the output current has only a fundamental wave by properly manipulating the shorting time of the resonant capacitor even though the output current is not a sinusoidal wave. More over the output power of the inverter can be controlled, which is obtained by subtracting the loss power from the input DC power.
2005-08-01