摘要
Abstract
[Objective]The axial stagger high-speed switched reluctance motor employs dual stator-rotor sets with a staggered angle to mitigate the high torque ripple inherent in conventional switched reluctance motors(SRMs)due to their double salient structure and nonlinear magnetic circuit.In order to further reduce the torque ripple and improve the efficiency of the motor,a new torque sharing function strategy for switched reluctance motor with stagger structure is proposed in this paper.[Methods]The strategy,aimed at the steady-state operation phase,takes into account the two sets of stator and rotor are in single-phase conduction and single-phase conduction and two-phase exchange conduction respectively.The former allocated the torque of the two conduction phases according to the torque per square ampere,while the latter used the torque generated at the single-phase conduction side to compensate for the lack of torque at the two-phase exchange side,in order to achieve optimal allocation of torque to each phase winding on both sides of the motor.What's more,in order to ensure the reliability of the control system,the operation process of the control system was designed.The current chopping control strategy was adopted in the start-up phase to limit the current peak while ensuring the rapid tracking of the given speed.The torque sharing function in the transition phase was designed to realize the smooth switching from the start-up phase to the steady-state operation phase.Finally,a simulation model of the motor control system was built using Simulink to verify the effectiveness of the control strategy proposed in this paper.[Results]The transient simulation results indicated that the proposed control strategy optimized the speed regulation time and overshoot,ensuring a smooth transition between the start-up phase and the steady-state phase,thereby verifying the reliability of the proposed control strategy.The steady-state simulation results demonstrated that the torque ripple coefficient and torque current ratio of the improved torque sharing function strategy were superior to other four traditional torque sharing function strategies under both low-speed and high-speed conditions.[Conclusion]The control strategy proposed in this paper has the feasibility and stability,which can reduce the torque ripple and improve the efficiency of the motors,and provides a new idea for improving the control performance of high-speed switched reluctance motors.关键词
高速开关磁阻电机/错角结构/转矩电流平方比/转矩分配函数Key words
high-speed switched reluctance motor/stagger structure/torque per square ampere/torque sharing function分类
信息技术与安全科学
