Design and Performance Evaluation of a High Power-Density EMI Filter for PWM Inverter-Fed Induction-Motor Drives

• Published in: IEEE transactions on industry applications Vol. 52; no. 3; pp. 2397 - 2404
• Main Authors: Ala, Guido, Giaconia, G. Costantino, Giglia, Graziella, Di Piazza, Maria Carmela, Vitale, Gianpaolo
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-05-2016; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Active filters; CM and DM separation techniques; Density measurement; Design analysis; Electromagnetic interference; Frequency measurement; Hardware; Induction motor drives; Instrumentation; Modulation; Power Converters; Power Density; Power system measurements; Pulse duration modulation; Pulse width modulation; Radio frequencies; Separation; Common-mode (CM) and differential-mode (DM) separation techniques; power density; power converters; motor drives; electromagnetic interference (EMI) filter
• ISSN: 0093-9994; 1939-9367
• DOI: 10.1109/TIA.2016.2518129

This paper presents the design of an electromagnetic interference (EMI) filter for a low-voltage high-current induction-motor drives supplied by dc power grids. In order to effectively design the EMI filter, a suitable common-mode/differential-mode (CM/DM) separation technique has been used. Due to the high operating currents, the software-based separation technique using time-domain measurements has been applied. The proposed technique allows the CM and DM sections of the EMI filter to be properly selected in a more economical way, i.e., without the need of a dedicated hardware or costly radio frequency (RF) instrumentation. The design has been done according to a power-density criterion. The effectiveness of the proposed CM/DM separation technique and the EMI filter features/performance has been assessed by experimental tests, carried out with an 1.1-kW pulsewidth modulation (PWM) inverter-fed induction-motor drive, supplied by a 48-V dc power grid.