[关键词]
[摘要]
为改善混合励磁同步发电机的气隙磁密分布,采用三段式气隙长度对转子进行了优化,对比了优化前后的气隙磁密。为抑制电压谐波,在完成转子结构优化的基础上,进一步采用短距、分布电枢绕组以及定子斜槽等措施。最后对样机电压波形进行了实测和质量分析,结果表明:采用三段式气隙长度与定子斜槽相结合,可将电压波形的总谐波失真(THD)抑制在5%的范围内。此外,探讨了偏心距法在切向/径向混合励磁电机中应用的可行性,并对比了分别采用偏心距法和三段式气隙长度法时的气隙磁密。
[Key word]
[Abstract]
In order to improve the airgap magnetic field distribution of hybrid excitation synchronous generator, a method named threelevel airgap length was introduced to optimize the rotor structure. The airgap flux densities, before and after optimization based on this method were analyzed and compared. After the rotor structure was optimized, the armature winding scheme with short pitch, distributed arrangement and skewed slots was adopted for a better voltage waveform quality. Then, prototype was tested to analyze its harmonic components of phase voltage with a power analyzer. Experimental results demonstrated that the total harmonic distortion (THD) of voltage could be restrained to the acceptable range(less than 5%) based on the combination of the threelevel airgap length and the stator skewed slots. Finally, feasibility of the eccentricdistance method used in the tangential/radial hybrid excitation synchronous generator was discussed, and the calculation results of airgap flux density were compared for the eccentricdistance method and the threelevel airgap length method.
[中图分类号]
TM 311
[基金项目]
国家自然科学基金项目(50977044,51377076);江苏省自然科学基金项目(BK20151574)