以1台海上6 MW中速永磁风力发电机为研究对象，针对不同电磁方案进行电机电磁特性仿真分析，结果显示：采用不等气隙斜槽电磁方案产生的齿槽转矩仅为额定转矩的0.74%，线电压波形畸变率为1.72%，该电磁方案下的负载特性和短路特性均能满足产品设计要求。冷却方案采用空-空冷却方式，并通过温度特性分析验证了方案的可行性。根据该设计方案制作了2台样机进行试验验证，结果表明电机空载电压、空载损耗、定子绕组温升和效率特性试验结果与仿真分析结果基本吻合，验证了该设计的合理性。

Taking an offshore 6 MW medium-speed permanent magnet wind generator as the research object，the electromagnetic characteristics of the motor are simulated and analyzed for different electromagnetic schemes. The results show that the cogging torque generated by the unequal air gap skew-slot electromagnetic scheme is only 0.74% of the rated torque, and the line-voltage waveform distortion rate is 1.72%. The load characteristics and short circuit characteristics of the electromagnetic scheme can meet the requirements of product design. The air-to-air cooling scheme is adopted, and the feasibility of the scheme is verified by the analysis of temperature characteristics. According to the design scheme, two prototypes are made for test and verification. The test results of no-load voltage, no-load loss, temperature rise of stator winding and efficiency characteristics of the motor are basically consistent with the simulation analysis results, which verifies the rationality of the design.