摘  要：根据新型的基于电流源型风力发电系统的要求，采用分数槽集中绕组设计了输出功率为10 kw的高电感永磁同步发电机，并运用有限元法分析了电机在不同负载情况下工作特性。分析结果表明，电机的齿槽转矩较小，电机绕组的感应电动势接近正弦，在一定的转速范围内，电机输出的电流经整流器整流以后，其直流电流波动小，满足电流型风力发电系统控制要求。
关键词：永磁同步发电机；高电感；风力；有限元

Abstract: The locus of the points on the stator surface of double rotors ultrasonic motor was simulated in this article,and the mechanism of motor was described intuitively.The elliptic angle was calculated uslie Timoshenko beam theory.According to the angle and the displacement equation of piezoelectric ceramics,the vertical vibration amplitude was calculated.Conbine with Hertz contact theory,got the width of contact area under a certain pre-load,and then got the torque model.The angle and torque of the single and double rotors ultrasonic motor in the same size were obtained.Compared and knowed that the torque of double rotors motor was over twice larger than the single rotor’s.It proved the double rotor stracture’s merit on the torque and theoretical foundation for optimal design of the structure.
Key Words: Ultrasonic motor;Double rotors;Elliptic angle;Output torque