摘要
以车用永磁同步电机为研究对象,采用理论与数值相结合的方法对电机动力学特性进行分析。由于电磁力是影响电机振动的主要因素,首先对电磁转矩和电磁径向力的数学模型进行分析。然后将电机分为转子子结构、定子子结构和轴承连接子结构,采用模态综合法建立电机在电磁力作用下的动力学模型,并对它的响应特性进行分析。为了验证分析结果的有效性,建立了电机的有限元模型,并在相同工况下进行瞬态分析,有限元结果与理论结果具有较好的一致性,表明采用模态综合法建立的电机动力学模型具有较高可信度。最后根据该模型分析了不同参数下定子的动力学响应,并给出了气隙长度、极弧系数等参数的取值原则。
The permanent magnet synchronous motor（PMSM） used in electric vehicle was studied. The dynamic response characteristics of the motor were analyzed by combining theory and numerical method. Due to the electromagnetic force is the main factor affecting the vibration of the motor,the analytical model of the electromagnetic torque and the electromagnetic radial force were analyzed. The motor was divided into rotor substructure,stator substructure and bearing connection substructure. Modal synthesis method was used to establish the dynamic model of the motor under electromagnetic force. And the dynamic response of the system was obtained by numerical method. In order to validate the analysis results,finite element method was used to calculate the dynamic response of the system. The result showed a good consistency between the dynamical responses calculated by different methods. According to the modeling principle,the dynamic response of the stator under different parameters was analyzed. The principle of the parameters such as the length of the air gap and the coefficient of the polar arc was given.
作者
卢鹏
方明霞
LU Peng;FANG Ming-xia(Tongji University,Shanghai 200092,Chin)
出处
《微特电机》
2018年第6期9-14,共6页
Small & Special Electrical Machines
基金
国家自然科学基金项目(11772229)
关键词
电磁力
永磁同步电机
模态综合法
电机振动
electromagnetic force
permanent magnet synchronous motor（PMSM）
modal synthesis method
motor vibration
