Application of the MCT to soft-switched DC-AC converters
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abstract
The development of high power density and high efficiency soft-switched inverter drive for application to electric and hybrid vehicle systems is of current interest. MOS-Controlled thyristor (MCT) seems to be a good choice for this type of application due to its high power density features. Several experimental MCT evaluations, either with hard-switching or soft-switching, have been done on the first generation of MCT, developed and commercialized by Harris Semiconductor Corporation. Soft-switching techniques are generally used for improving the converter performance by expanding the Safe Operating Area (SOA) of power semiconductor devices. However, the published MCT soft-switching tests have shown the device operation to be below its hard-switching rating limits. This paper will show some soft-switching experimental results, with a better understanding on the MCT full operating limits, for the purpose of soft switching dc-ac converter design.
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IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting