关键词: 磁通切换电机, 多励磁源, 可变磁通, 极槽配合

Abstract: The core transportation of underground personnel, materials and equipment is undertaken by coal mine electric trackless rubber-tyred vehicles, which are the key equipment for maintaining the stable, efficient and reliable operation of the underground auxiliary transportation system in coal mines. The variable-flux flux-switching machine with multiple excitation sources is regarded as an ideal drive motor for such vehicles due to its advantages including high torque density and a wide speed regulation range. In this paper,a novel variable-flux multi-excitation-source flux-switching machine is taken as the research object, and research is conducted on the selection of its slot-pole combinations. The topological
structure and operating principle of the motor are elaborated. The influence laws of different slot-pole combinations on the motor’ s electromagnetic performance are systematically compared and analyzed based on finite element simulation,and the optimal slot-pole matching scheme that balances high torque density and superior flux regulation capability is determined. The accuracy of the simulation analysis results is effectively verified through prototype tests. The research findings obtained in this paper are able to provide an important theoretical foundation for the application of such motors in coal mine electric trackless rubber-tyred vehicles.

Key words: flux-switching machine, multiple excitation sources, variable flux, slot-pole combination