基于低频信号注入法的无轴承异步电机转速自检测控制

发布时间：2018-05-20 07:29

本文选题：控制 + 模型　；参考：《农业工程学报》2017年02期

【摘要】：针对无轴承异步电机运行中悬浮转子转速检测问题,提出了一种基于低频信号注入法的无速度传感器控制新策略。该策略在无轴承异步电机基波模型基础上,通过注入低频信号引起的响应来构造转子位置偏差角,进一步通过PI控制器对偏差角进行调节,得到电机气隙磁场旋转速度,进而估计电机转速。运用该转速自检测方法,在Matlab/Simulink平台中搭建了无轴承异步电机无速度传感器矢量控制系统仿真模型,并进行了仿真研究。仿真结果表明,该方法能够在0.15 s内快速跟踪转子转速,并且具有优良的悬浮和转矩特性。试验结果同样表明,该方法不仅具有良好的转速在线自检测能力,而且能在无速度传感器方式下实现转子稳定悬浮运行,验证了所提方法的有效性和实用性。
[Abstract]:A new speed sensorless control strategy based on low frequency signal injection is proposed to detect the rotor speed of bearingless asynchronous motor. Based on the fundamental wave model of bearingless asynchronous motor, the rotor position deviation angle is constructed by injecting the response caused by low frequency signal, and the rotor position deviation angle is further adjusted by Pi controller, and the rotating speed of the air-gap magnetic field is obtained. Then the motor speed is estimated. Using the speed self-detection method, the simulation model of bearingless asynchronous motor speed sensorless vector control system is built in Matlab/Simulink platform, and the simulation research is carried out. The simulation results show that the proposed method can track rotor speed quickly in 0.15 s and has excellent suspension and torque characteristics. The experimental results also show that the proposed method not only has a good on-line self-detection capability of rotating speed, but also can realize the stable suspension operation of the rotor in the sensorless mode. The effectiveness and practicability of the proposed method are verified.
【作者单位】：江苏大学电气信息工程学院;江苏大学汽车工程研究院;
【基金】：国家自然科学基金(51475214、51305170)
【分类号】：TM343

【相似文献】