基于Maxwell仿真分析的永磁同步直驱滚筒电磁特性研究

Research on Electromagnetic Characteristics of Permanent Magnet Synchronous Direct Drive Drum Based on Maxwell Simulation Analysis

摘要: 针对当前矿井提升机中传统电动机工作效率较低，整体结构复杂，难以适应国内外矿井中复杂多变的工作环境的缺点，以一台额定功率为425 kW的外转子式永磁同步直驱滚筒提升机为目标，对其进行磁路分析及不同参数对齿槽转矩的影响分析。通过CAD建模结合Maxwell软件对直驱滚筒建立电磁仿真模型，模拟得到直驱滚筒的空载与额定负载运行特性，并着重分析齿槽转矩的影响因素。结果表明：定子开口槽的槽宽对齿槽转矩幅值影响较小，且槽宽与开口槽整体结构对齿槽转矩的影响呈现一致性；增大极弧系数，会导致电机齿槽转矩的幅值先减小后增大再减小。通过对不同结构参数对电机电磁特性的分析，为后续对大功率直驱滚筒的优化设计奠定基础。

Abstract: In view of the disadvantages of the traditional motor in the current mine hoist, such as low working efficiency and complex overall structure, which is difficult to adapt to the complex and changeable working environment at home and abroad, an external rotor permanent magnet synchronous direct drive drum hoist with rated power of 425 kW is taken as the target, the magnetic circuit analysis and the influence of different parameters on the tooth groove torque analysis are carried out. The electromagnetic simulation model of the direct drive drum was established through CAD modeling combined with Maxwell software. The no-load and rated load operating characteristics of the direct drive drum were simulated, and the influencing factors of the cogging torque were analyzed emphatically. The results show that the slot width of the stator open slot has a relatively small influence on the amplitude of the cogging torque, and the influence of the slot width and the overall structure of the open slot on the cogging torque is consistent. Increasing the pole arc coefficient will cause the amplitude of the motor cogging torque to first decrease, then increase, and then decrease again. Through the analysis of the electromagnetic characteristics of the motor caused by different structural parameters, a foundation is laid for the subsequent optimization design of high-power direct drive rollers.