To investigate the influence of stator structure on the electromagnetic performance of high-speed permanent magnetic generator( HSPMG), according to the structure of a 100 kW level HSPMG, the mathematical model and physical model for its two-dimensional electromagnetic analysis were established,and the flux distribution of generator working in steady state was calculated, and machine operating parameters such as output power, terminal voltage, eddy loss, and iron loss were determined and compared with the test data. Then, the influences of stator back around windings on induced electromotive force (EMF), and the effects of additional leakage flux on stator yoke magnetic density were analyzed, through the comparisons of electromagnetic fields and performance in HSPMG with the back around windings and the traditional stator windings structure. The variations of main magnetic circuit caused by slotted stator and its effects on machine electromagnetic performances were studied. The tendencies of leakage flux in main magnetic circuit in generators with slotted and toothless stator core were comparatively researched,as well as the distributions of different kinds of losses. The results show that the back around windings increase machine EMF and lower the load magnetic density in stator yoke, whereas the toothless stator core makes rotor eddy loss lower and copper loss higher.%为了研究定子结构型式对高速永磁发电机电磁性能影响,根据一台100 kW级高速永磁发电机的结构特点,建立高速永磁发电机的二维电磁分析数学模型和物理模型.采用时步有限元法对电机稳态工作时的电磁场进行计算分析,确定电机输出功率、端电压、涡流损耗和铁耗等运行数据,并与部分实测数据进行对比.通过分析采用传统绕组结构和背绕式绕组结构时的电机磁场分布和性能变化,研究了背绕式绕组引起空载反电动势的变化及轭背部绕组产生附加漏磁场对铁心磁密分布的影响,对比分析了定子铁心开槽与否对电机主磁路漏磁通影响及引起各种损耗分布变化趋势.计算结果表明,背绕式绕组结构增加了绕组感应电动势,并使定子轭部负载磁密略微降低,而无槽结构定子铁心增加了电机铜耗,减少了转子涡流损耗.
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