一种单绕组无轴承开关磁阻电机抑制转矩脉动和悬浮力波动的控制方法

A Novel Control Method for Single-Winding Bearingless Switched Reluctance Motor to Reduce Torque Ripple and Radial Force Ripple

由于定、转子的双凸极结构,无轴承开关磁阻电机在采用传统控制方法时存在较大的转矩脉动和悬浮力波动。为解决这一问题,该文提出一种直接瞬时转矩和直接悬浮力控制方法(DITC&DFC)。该方法通过转矩滞环控制以及等效电压符号选择的方式,同时对电机转矩和悬浮力进行直接控制,并且省去了传统算法中的电流环,在控制性能得到提升的同时简化了控制算法。基于12/8极单绕组无轴承开关磁阻电机,详细分析了电机悬浮机理和所提控制方法的工作原理,基于Matlab/Simulink仿真环境和原理样机实验平台,通过仿真和实验验证了该控制方法的可行性和有效性。

Because of the double-salient-pole structure of Bearingless Switched Reluctance Motors （BSRMs）, the problem of large torque ripple and radial-force ripple will be brought when using the conventional control method. In order to solve this problem, a direct instantaneous torque control and direct force control （DITC＆DFC） method is proposed in this paper. By the way of torque hysteresis control and selecting equivalent voltage symbols, the proposed method can directly control torque and levitation forces at the same time. In addition, the current hysteresis control loop is removed, which simplifies the control algorithm together with the improvement on the control performance. The levitation mechanism and the principle of the proposed method are demonstrated in detail based on a 12/8 single-winding BSRM. Based on the Matlab/Simulink simulation and the test rig established in laboratory, the feasibility of the proposed control method has been verified according to the simulation and experimental results.