Series converter based on Si IGBT/SiC MOS hybrid parallel devices, and fault operation control method thereof
A technology of series converters and devices, which is applied in the direction of output power conversion devices, electrical components, and high-efficiency power electronic conversion, and can solve the problem that series converters cannot simultaneously meet low turn-on loss, low switching loss, low cost, high overload and short circuit Capability, increased system maintenance costs, low reliability of converters, etc.
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[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.
[0039] Such as figure 1 As shown, the present invention proposes a series converter based on a Si IGBT / SiC MOS hybrid parallel device. The series converter is a half-bridge structure, including three output terminals of DC positive, DC negative and AC, and the upper and lower bridge arms are symmetrical. Both the upper bridge arm and the lower bridge arm are composed of n+r hybrid parallel devices in series, of which n devices maintain the normal operation of the series converter, and r devices are used for redundancy. Each hybrid parallel device in the series converter consists of a A SiC MOS and b IGBTs are connected in parallel, that is, the drain of each SiC MOS in the hybrid parallel device is connected to the collector of each IGBT, the source of each SiC MOS is connected to the...
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