고조파 전류를 이용한 영구자석형 동기 전동기의 토크 리플 저감

다국어 초록 (Multilingual Abstract)

This paper deals with the torque ripple reduction of permanent magnet synchronous motor using harmonic current injection. Torque ripple of electric motor reduces system stability and performances, therefore efforts to reduce torque ripple are exerted in the design process. Torque ripple can be reduced by appropriate pole/slot combination, skew of rotor or stator, design of magnetic circuit, etc. In addition, torque ripple can be also reduced by input voltage and current, and many researches have been conducted to reduce torque ripple for six-step drive. Torque ripple reduction for current vector controlled permanent magnet synchronous motor also have been conducted and verified by investigating back emf wave form. Torque ripple reduction in this paper started from getting torque profile according to input current and electrical angle calculated by FEA, then instantaneous currents at each electrical angles for constant torque are calculated and applied to experiments. Therefore, 0% of torque ripple can be obtained theoretically with harmonic current injection. In order to maximize the effect of torque ripple reduction, a BLDC motor having high harmonic component of back emf is chosen. With sinusoidal current drive, over 100% of torque ripple is obtained initially, then 0.5 % of torque ripple is obtained by FEA using harmonic current injection. The effect is verified by experiment and the presented method can be effectively applicable to Electric Power Steering(EPS).

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 본론
• 3. 결론
• 참고문헌
• 저자소개

참고문헌 (Reference)

1 윤덕용, "인버터의 전류 측정 오차에 기인하는교류전동기의 토크리플 저감" 3 (3): 1998

2 김기찬, "매입자석 동기 모터의설계 및 제어" 도서 출판 인터비젼 2007

3 Geun-Ho Lee, "Torque Ripple Reduction of Interior Permanent Magnet Synchronous Motor Using Harmonic Injected Current" 44 (44): 2008

4 Ki-Yong Nam, "Reducing Torque Ripple of Brushless DC Motor by Varying Input Voltage" 42 (42): 2006

5 Rakib Islam, "Permanent-Magnet Synchronous Motor Magnet Designs With Skewing for Torque Ripple and Cogging Torque Reduction" 45 (45): 2009

6 John S. Hsu, "Nature and Assessments of Torque Ripples of Permanent-Magnet Adjustable-Speed Motors" 2696-2702, 1995

7 A. Kioumarsi, "Mitigation of Torque Ripple in Interior Permanent Magnet Motors by Optimal Shape Design" 42 (42): 2006