논문 해외 국제전문학술지(SCI급) TORQUE CHARACTERISTIC WITH RESPECT TO THE LOAD ANGLE OF A PERMANENT MAGNET MOTOR
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2012-11
- 저자명 김기찬
- 학술지명 IEEE TRANSACTIONS ON MAGNETICS
- 발행처명 IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 2
홈페이지논문 초록 (Abstract)
This paper deals with a simple and effective method of calculating average torque and torque ripple with respect to load angle for reluctance motors and permanent magnet motors. In a vector inve rter, these motors are generally controlled by sine wave currents. Wh en the position of the rotor is rotated relative to the stator, and th e three phase currents have a fixed value, a torque curve can be plotte d with reference to the load angle. Load angle refers to the differenc e in angle between the magnetic flux axis of a stator current and th e magnetic flux axis of a permanent magnet within a rotor. The pr ocess is repeated using several different electrical angles for the thre e phase currents. The results are then overlapped, using the same load angle curve. Finally, the average torque and torque ripple can be pl otted as a function of the load angle. The advantage of this proposed m ethod is that both the average and ripple torques can be determined ove r a wide range of load angles simply by performing several torque analy zes with a simple static finite element method rather than using a tran sient method. This proposed method has been experimentally verified. The torque characteristics of permanent magnet motors with differe nt rotor structures, with respect to the load angle, are analyzed and c ompared for the purpose of application.