Читать книгу Soft-Switching Technology for Three-phase Power Electronics Converters - Rui Li - Страница 25

High speed drives such as pumps or compressors are applied in the industry. The inverter of high speed drives needs to operate at very high switching frequency up to tens of kHz. Since switching loss is proportional to switching frequency, switching loss of the power semiconductor in a high speed drive is so high that the power devices have to operate at its derating state for the safety. Thus the power rating of power device is unable to be fully utilized. An auxiliary resonance circuit is introduced to the DC side of the inverter as shown in Figure 1.26. The switch loss of the inverter is significantly reduced due to soft‐switching of the power devices in the inverter.