关键词: 对转永磁同步电机, 电磁设计, 有限元分析, 空载特性, 负载特性

Abstract: Contra-rotating propulsion can enhance system propulsion efficiency and structural compactness. In this paper,a dual-rotor contra-rotating permanent magnet synchronous motor was designed for driving contra -rotating propulsion systems. Based on electromagnetic principles, a design method for this motor was established. Furthermore, an electromagnetic scheme design and key dimensional parameter optimization are conducted for a 6 kW motor to ensure that its core performance meets propulsion requirements. The inner motor adopts a Halbach magnetic pole design to balance the air gap magnetic density design of the inner and outer motors. The stator part of the motor employs a fractional slot structure and a specific winding design to optimize performance. Through finite element simulation,the no-load and load characteristics of the motor were systematically analyzed. The simulation results verify the feasibility and effectiveness of this electromagnetic design scheme, providing a theoretical basis and design reference for the engineering design and application of contrarotating propulsion systems.

Key words: contra-rotating permanent magnet synchronous motor;electromagnetic design, finite element analysis, noload characteristics;load characteristics