大功率中速永磁风力发电机设计及性能研究

提出了一种基于ANSYS Maxwell 2D等效磁路法的电磁仿真和工程热分析相结合的电机设计方法。通过Maxwell 2D对4.8 MW中速永磁风力发电机进行设计,为了进一步研究发电机的运行特性,建立了永磁发电机有限元分析计算模型。对发电机的空载、额定负载和短路性能进行仿真分析计算,获得各工况下的电流、反电动势和电磁转矩等波形,并且采用热路法对电机各部分温升情况进行计算。仿真计算结果表明该发电机设计合理,各项指标均符合要求。电磁仿真和工程热分析相结合可以更加准确地指导电机设计,为发电机的电磁设计和结构优化提供理论依据。

Design and Performance Research of High-Power Medium-Speed Permanent Magnet Wind Power Generator

A generator design method which is the combination of electromagnetic simulation based on equivalent magnetic circuit method using ANSYS Maxwell 2D and engineering thermal analysis is presented. Through the analysis and calculation by ANSYS Maxwell 2D, the 4.8 MW medium speed permanent magnet wind power generator is designed. In order to further study the operation characteristics of the generator, the finite element analysis and calculation model of the permanent magnet generator is established. The no load, rated load and short circuit performances of the generator are simulated, and the current, induced voltage and electromagnetic torque are obtained. Finally, the temperature rise of each part of the generator is calculated by the thermal circuit method. The calculation results show that the design of the generator is reasonable and all indexes meet the requirements. The combination of electromagnetic simulation and engineering thermal analysis can make the generator design more accurately. It provides the theoretical basis for the electromagnetic design and structural optimization of generators.