无轴承异步电机研究与实现

 对无轴承异步电机中悬浮力产生原理, 以及如何实现电枢转矩和悬浮力解耦控制的工作原理做了简要介绍, 并提出了以功能强大的高速数字信号处理器(TMS320F240) 为控制核心的数模混合控制电路。对原理样机的悬浮实验分析表明, 提出的悬浮系统能够在稳速和变速过程中满足悬浮要求, 并且转轴的径向位移不超过50Lm。

Research and Developments of Bearingless Induction Motors

Bearingless induction motors have been the focus of research work on high speed motors, as its rotor shaftcan be suspended by magnet ic force without conventional magnetic bear ings. Compared with magnetic bear ing motors, the axial lengt h of the rotor shaft is decreased, which results in an incr eased frequency of mechanical resonancein the flexible rotor and high power density. I n the paper, the principle of levitation force and the decoupling controlof torque and radial force ar e shown. An analog-digital hybrid controller based on DSP TMS320F240 is proposed.The t est results in a prototype motor validate t he per formance efficacy of the proposed contr oller in a steady state, aswell as in a transient state. And the maximum radial displacement is less than 50Lm.