并列式双转子混合自励磁电机励磁源参数优化设计和磁场调节特性分析

Optimization Design of Excitation Source Parameters and Magnetic Field Regulation Characteristics Analysis for Parallel Dual-Rotor Hybrid Self-Excited Motor

针对永磁同步电机气隙磁场不可调以及传统电励磁电机的效率低等问题,提出了一种新型并列式双转子混合自励磁电机。首先,该电机利用谐波激励原理,通过调节谐波电压可灵活调整励磁电流,在中高速域更容易实现弱磁扩速。其次,保证功率不变的前提下,先分析两部分各占的比重,再分别对励磁源参数进行优化设计。最后,通过调节励磁电流的大小与方向且利用二维有限元模型对所提电机的性能进行验证。仿真结果证明:所提电机具有较好的调磁能力,在弱磁情况下,反电动势幅值接近于0,可以有效实现转速调节。

To address the fixed air-gap magnetic field of permanent magnet synchronous motors and the inefficiencies of traditional electrically excited motors,a novel parallel dual-rotor hybrid self-excited motor is introduced.Firstly,the proposed motor utilizing the harmonic excitation principle,it allows for flexible control of excitation current by adjusting harmonic voltage,which enhances speed control in medium and high-speed ranges.Secondly,under the premise of ensuring that the power remains unchanged,the proportion of each of the two parts is analyzed,and then the excitation source parameters are optimized and designed.Finally,the performance of the proposed motor is verified by adjusting the magnitude and direction of the excitation current and using the two-dimensional finite element model.The simulation results show that the proposed motor has a good ability to adjust the magnetism,and in the case of weak field,the amplitude of the back electromotive force is close to 0,which can effectively realize the speed adjustment.