![]() The analysis results give insights into the CM current generation, coupling, and mitigation methods for high power applications such as high performance double-conversion UPS, drives, microturbine generators, and doubly fed wind turbine-generators. Contributions of the common mode voltage sources and coupling paths, as well as effect of a long cable and the common mode choke, are analyzed for both input-side and output-side conducted CM EMI. Both frequency domain and time domain studies are performed for (a) three-phase PFC rectifier (b) back-to-back connected rectifier and inverter and (c) multiple back-to-back connected rectifiers/inverters with interleaved gating control. The analysis is based on the common mode equivalent circuit models derived from the detailed circuit models. ![]() ![]() A comprehensive analysis of common mode (CM) EMI is conducted for three-phase voltage source converters in various configurations.
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