Broadband Electromagnetic Compatibility Model of Three Phase Synchronous Motor

In the working process of electric drive system, the switching characteristics of motor controller produce broadband and high amplitude electromagnetic interference (EMI), which poses a threat to itself and other electronic and electrical equipment. In this paper, an innovative modeling method for three phase synchronous motor is introduced, which considers broadband parasitic effect. Based on this method, an equivalent model of a 140kW permanent magnet synchronous motor is constructed, and the accuracy of the model is verified by comparison with practical test. With wide frequency range, good convergence and high accuracy, this method can be cascaded with other electronic and electrical modules to form a complete electric drive system model, which can effectively support the rapid analysis and prediction of system level EMI and electromagnetic susceptibility (EMS) problem.