基于转矩绕组无功功率MRAS的无轴承异步电机无速度传感器矢量控制系统

针对无轴承异步电机高速运行需要和转速在线估计问题，提出了一种基于转矩绕组无功功率模型参考自适应控制系统的无速度传感器矢量控制方法。经过数学推导，建立了转速与转矩绕组无功功率的关系式，消除了积分环节和定子电阻的影响，实现对转子转速的在线独立观测。应用此策略构建了无轴承异步电机无速度传感器矢量控制系统。仿真研究结果表明，该控制策略能实现无轴承异步电机在大负载扰动下的稳定悬浮运行，转子估计转速与实际转速的稳态误差小，控制精度高，验证了所提方案的有效性。

Speed-sensorless Vector Control System of Bearingless Induction Motor Based on Reactive Power MRAS of Torque Winding

Aiming at the needs of high-speed operation and the inspection problem of rotor speed in bearingless induction motors,a speed-sensorless vector control method which refers to model reference adaptive system is proposed base on the model of reactive power torque windings. The relationship between rotational speed and torque windings reactive power is established by mathematical derivation to eliminate the integration process and the effect of stator resistance, and to achieve the online independent observations of rotor speed. With previous procedures, the bearingless induction motor speed sensorless vector control system is build. The results obtained from the simulation show that this control strategy can achieve the stably suspended operation of bearingless induction motor under big load disturbances, and small steady-state difference between estimated rotor speed and the actual speed. The control strategy has high control precision and verifies the effectiveness of the proposed scheme.