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由于转子无永磁体、制造成本低,无轴承磁通切换电机在医疗卫生、生化反应等需要一次性抛弃或需要处理高温流体等应用场合具有独特优势.该文在分析了传统无轴承磁通切换电机的工作原理基础上,探究悬浮力与转子转角及气隙之间的关系,结果表明其悬浮力特性畸变严重,控制困难.针对该问题,文中研究了一种转子交错并列式的新型结构,理论分析表明该结构可有效消除悬浮力中大量的偶次谐波及直流分量,从而达到优化悬浮力、简化控制的目的.在此基础上,推导了悬浮力数学模型,并进行了有限元仿真对比分析,研究结果验证了该新型结构对悬浮力优化效果以及控制算法的正确性,且悬浮力与转矩之间具有较好的解耦控制效果.最后,研制了一台样机,对电机转矩相关性能进行了实验验证和分析,成功实现了稳定悬浮.“,”Because of permanent magnet on stator and low cost of rotor,bearingless flux-switching motor is especially suitable for disposable applications and some high temperature fields,such as medical treatment and biochemical process.In this paper,the levitation principle of bearingless flux switching motor was firstly studied.Based on that,the relationship between the air gap and levitation forces characteristics was investigated.The result shows the distorted force characteristics,leading to difficulty of control effort.Aiming at improving the levitation force characteristics and simplifying the control,an optimization topology was introduced in this paper.Theoretical analysis indicates that the even harmonics and DC component are greatly reduced in the optimization structure.Then the mathematical model was deduced.The optimization effect and control strategy was verified by FEM.FEM result also shows good decoupling performance between torque and levitation forces.Finally,a prototype was manufactured.The torque performance was tested by experiments and stable levitation was implemented successfully.