ABSTRACT High‐frequency switching operations of power switching tubes generate high‐frequency voltage and current pulse signals, resulting in substantial electromagnetic interference. As servo drive systems continue to evolve toward higher power density, integration and miniaturization, their internal electromagnetic environment grows increasingly complex, further intensifying interference levels and imposing higher demands on system electromagnetic compatibility (EMC) design. To address this challenge, this paper proposes a modelling method based on multi‐software co‐simulation to precisely model radiated interference in permanent magnet servo drive systems. Through an in‐depth analysis of interference sources and their main propagation paths within the servo drive system, high‐frequency impedance models were established for key components including cables, bus capacitance, MOSFETs and permanent magnet motors. Combined with a field‐circuit‐control co‐simulation strategy, this approach enables prediction of radiated interference. To validate the reliability of the model, a measurement scheme under typical operating conditions was designed. Radiated interference data from the actual system was obtained and compared with simulation results. The findings demonstrate that the established model is highly accurate and provides a reliable pre‐evaluation tool for subsequent system‐level EMC design and optimization.
He et al. (Thu,) studied this question.
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