横向错位磁场调制型无刷双转子电机的工作机理与性能分析

Operating Principle and Performance Analysis of Transverse-Dislocated Magnetic-Field Modulated Brushless Double-Rotor Machine

针对传统对转推进电机旋转绕组带来的散热困难、可靠性差、动平衡难以保证等瓶颈问题,提出一种横向错位磁场调制型无刷双转子电机(TDMFM-BDRM)。该电机基于三维磁场调制原理进行工作,定子绕组因沿轴向均布而使定子侧不受周向力作用,使得电机两个转子受到实时等大反向电磁转矩作用,非常适用于对转推进领域。此外,TDMFM-BDRM采用无端部的环形绕组结构,节省了大量空间。该文首先介绍TDMFM-BDRM的拓扑结构并分析其工作机理和运行特性;然后通过有限元仿真分析其三维气隙磁场调制行为和电磁特性;最后对比传统对转推进电机与TDMFM-BDRM的结构特点和电磁性能,结果表明,TDMFM-BDRM具有更强的转矩输出能力和更高的可靠性。

The rotating windings of the conventional contra-rotating propulsion machine(CCRPM)bring some bottleneck problems like poor heat dissipation,decreased reliability,and difficult dynamic balance.Therefore,a transverse-dislocated magnetic-field modulated brushless double-rotor machine(TDMFM-BDRM)is proposed.The TDMFM-BDRM operates based on three dimensional(3D)magnetic-field modulated principle,and its stator is not subjected to circumferential force since windings are distributed along the axial direction.Correspondingly,the real-time equal and opposite torques can be generated,which is suitable for contra-rotating propulsion.Moreover,the TDMFM-BDRM employs ring winding with no end winding,which saves a lot of space.The structure,operating principle and characteristics are introduced and analyzed.Then,the 3D air-gap magnetic-field modulated behavior and electromagnetic characteristics are analyzed by FEA.Finally,compared with the structural characteristics and electromagnetic performances of the CCRPM,the TDMFM-BDRM has more robust torque output capability and higher reliability.