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Self-Oscillating Drive Circuit Using Cascode-Connected Normally-on Device and Normally-off Device for Self-Powered Active Bridges
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| Author(s) |
Yoshihiro MIWA, Hiroyuki SHOJI, Junichi SAKANO |
| Abstract |
Self-powered active bridges have the same number of external terminals as diode bridges, and they can improve the efficiency of conventional PFC boost rectifiers that come with a diode bridge for line rectification. However, bulk capacitors required for accumulating energy to drive rectification MOSFETs cause increase in the mounting area of drive circuits. This paper proposes a novel self-oscillating drive circuit, in which two pairs of cascode-connected a high-breakdown voltage normally-on device and a low-breakdown voltage normally-off device are used as the lower-arm rectification switches, to reduce the number of bulk capacitors. The operation of the proposed drive circuit was verified experimentally, and the efficiency of a 2.4 kW PFC boost rectifier that comes with the proposed drive circuit was measured. |
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| Filename: | 0302-epe2023-full-02301320.pdf |
| Filesize: | 631.2 KB |
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| Type |
Members Only |
| Date |
Last modified 2023-09-24 by System |
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