Influence of Different Rotor Structure on Flux-Weakening Properties of Permanent Magnet AC Servo Motor
Mo Wei1, Wang Mei2, Mo Huicheng3
1. Xi’an Micromotor Research Institute Xi’an 710077 China;
2. Collage of Electrical and Control Engineering Xi'an University of Science and Technology Xi’an 710054 China;
3. Shanxi Science and Technology Holding Group Xi’an 710077 China;
This paper explores the influence of interior and surface typical permanent magnet rotor structure on flux-weakening properties of permanent magnet AC servo motor, the variation law of the maximum mechanical and power characteristics of the motor output when the center position of the voltage limit curve is inside and outside the current limit circle is deduced. The research of two kinds of permanent magnet rotor structure motor utilizes base speed point of flux-weakening as the demarcation point, torque and power can operates constantly and rises approximate linearly below that point. After operating that point, surface and interior structure of motor torque indicates a downward trend and continues to rise to the maximum then decrease, respectively. When the center position of the voltage limit curve is in the current limit circle and outside the circle, the power continues to rise to the maximum point and then shows the maximum constant power operating state and a rapid decline trend separately, the maximum output power of the flux-weakening operation is greater than the tradition power constant value of the flux-weakening operation is proved. The analysis and deduction are in agreement with the experimental results, to provide a more detailed theoretical foundation for the characteristic analysis of permanent magnet AC servo motor in flux-weakening operation.
莫为, 汪梅, 莫会成. 不同转子结构对永磁交流伺服电机弱磁特性影响[J]. 电工技术学报, 2018, 33(zk1): 89-98.
Mo Wei, Wang Mei, Mo Huicheng. Influence of Different Rotor Structure on Flux-Weakening Properties of Permanent Magnet AC Servo Motor. Transactions of China Electrotechnical Society, 2018, 33(zk1): 89-98.
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2018, Vol. 33 
