Integrated modeling of a motor driven system for analysis of conducted emissions

Recently, due to their high performance, electrical components with Pulse Width Modulation and a motor are being used in automotive systems. However, this increases the electromagnetic interference that affects electronic components in and the performance of automotive systems, making it more difficult to satisfy the standard of electromagnetic compatibility and electromagnetic issues. To solve the EMC problems in the design phase, detailed SPICE modeling is essential. In this paper, a detailed circuit of a motor driven system is proposed. The model is valid in the radio frequency range from 100 kHz up to 30 MHz. Moreover, this model takes into account the impedance effect in the chassis ground of the motor frame. For verification, the simulation results and measurement results are compared. A strong correlation between the SPICE model and the actual object is exhibited.