交流圆弧磁悬浮感应电机机制研究

Study of the Mechanism of Alternating Arc(AC) Magnetic Levitation Induction Motor

磁悬浮(无轴承)电机利用磁场力使转子悬浮并驱动其实现高速或超高速旋转.基于传统电机技术提出一种交流圆弧电机原理,并按电磁轴承悬浮技术,水平方向对称于转子布置2个圆弧电机,垂直方向对称于转子布置2个圆弧电机,构成交流磁悬浮感应电机;建立电机在干扰作用下转子与定子间的间隙(气隙长度)变化规律,基于电磁理论建立了气隙磁感应强度的分布规律,利用虚位移原理建立电机电磁悬浮力和电磁转矩数学模型;通过有限元分析对磁感应强度、电磁悬浮力和电磁转矩等分布特性进行了仿真研究.

Magnetic levitation （no bearings） motor employs magnetic force to make rotor suspend and drive so as to realize its high or ultra high speed rotating. Based on the traditional motor technology, this paper puts forward a kind of alternating arc motor principle, and an arc magnetic levitation induction motor is obtained by puts two arc motors in horizontal and vertical directions symmetric with rotor according to the electromagnetic bearing suspen- sion technology. The varying pattern of the air-gap between rotor and stator（air-gap length） under the effect of in- terference is determined, the distribution pattern of the air-gap magnetic induction intensity according to the electro- magnetic theory is established, and the mathematical model between the motor electromagnetism levitation and the electromagnetic torque is set up by means of the virtual displacement principle. With the finite element analysis method, simulation study is carried out to the magnetic induction intensity, electric magnetic levitation force, and distribution features of electromagnetic torque.