摘要
无轴承类电机转子的偏心运行是不可避免的,由有限元分析可知转子偏心对其径向受力影响较大,忽略转子偏心时的径向受力分析将很难实现转子的稳定悬浮运行。而目前有关无轴承类电机的径向力计算都没有考虑转子偏移量的影响,只是计算转子在中心位置时的受力情况。鉴于此,针对具有结构简单优势的单绕组无轴承开关磁阻电机(BSRM),本文提出了考虑转子偏移量的径向力数学模型,给出了绕组电流、电机结构参数、转子偏移量、转子旋转位置与径向力之间的数学关系。同时考虑到转子偏心对电磁转矩的影响较小,推导了忽略偏心影响的电磁转矩解析式。与有限元分析对比结果验证了本文径向力与转矩数学模型的正确性。最后,基于推导所得的数学模型对单绕组BSRM径向力与转矩控制进行了初步的动态仿真研究,进一步验证了数学模型的准确性与实用性。
The rotor eccentricity running is unavoidable for the bearingless types motor,and the finite element analysis results show that the rotor radial force is definitely affected by the rotor eccentricity.Supposing that the rotor eccentricity position is neglected,it is very difficult to accomplish the rotor steady suspension running.Currently,the rotor radial eccentricity does not be taken into account while calculating radial force of the bearingless types motor in the related references,that is to say the radial force can be calculated only when the rotor runs in the central position.In view of the above,the radial force analytical model is derived based on an approximate analysis method to obtain the mathematical relationships among the winding currents,the motor structure parameters,the rotor eccentricity position,the rotation angle,and the radial suspension forces.Refering to the finite element simulation results show that the rotor eccentricity has little influence on the torque,the electromagnetic torque analytical model is derived when the rotor eccentricity position is ignored.The proposed analytical model is verified by finite-element analysis results.Finally,a dynamic control of radial force and torque is primarily studied to show the correction and practicability of the analytical model.
出处
《电工电能新技术》
CSCD
北大核心
2016年第7期42-49,共8页
Advanced Technology of Electrical Engineering and Energy
基金
国家自然科学基金项目(50907004)
财政部
教育部基本科研业务费项目(2014JBM111)
关键词
单绕组
无轴承
开关磁阻电机
数学模型
偏心
single winding
bearingless
switched reluctance motor
mathematical model
eccentricity
