A Comprehensive Strategy for Modelling the Conducted EMI of an Integrated Motor Drive in the Time Domain

电磁干扰 时域 领域(数学分析) 计算机科学 汽车工程 电动机驱动 工程类 控制工程 电磁干扰 电气工程 机械工程 数学 数学分析 计算机视觉
作者
Kristjan Saksida,Marko Jankovec
出处
期刊:Informacije Midem-journal of Microelectronics Electronic Components and Materials [Drustvo MIDEM]
卷期号:51 (3)
标识
DOI:10.33180/infmidem2023.306
摘要

The paper introduces a comprehensive strategy for modelling the conducted electromagnetic interference (EMI) of a 48 V 11,2 kW permanent magnet motor drive with an integrated three-phase inverter in the time domain to comply with the CISPR 25 standard. The strategy is based on transient electrical simulations using LTspice® and EMI receiver modelling by signal post-processing in MATLAB®. To extract AC lumped component parameters for electrical simulations of the inverter, the Ansys® Q3D Extractor® environment was employed, while the electrical parameters of the motor side were determined from an impedance analyzer measurement. Two distinct transient simulations were performed and compared, namely a static PWM and a Space Vector Pulse Width Modulation (SVPWM) control strategy, where for the latter the simulation time was chosen to capture one electrical revolution of the motor. For the EMI receiver simulation, a digital Short-Time Fourier Transform (STFT) algorithm, compliant with CISPR 16‑1‑1, was implemented. The simulation of one electrical revolution of the motor lasted 43 minutes, resulting in the average spectral deviation between the measured and simulated spectrum bandwidth of 3,33 dBµV and 2,58 dBµV for peak and average detectors, respectively. The introduced strategy proposes a straightforward approach for the extraction of parasitic elements. Furthermore, it ensures accurate EMI prediction without compromising simulation time, which is crucial to stay within the timeframe when developing an automotive product.
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