新型结构高速无槽永磁同步电机研究

针对高速无槽电机电感普遍较小的问题,提出了一种新型结构的高速无槽永磁同步电机。该电机的定子采用一种集成电感的新型无槽结构,由一种新型无槽定子铁心和背绕式绕组两部分组成,能够显著增加每相绕组的漏感;转子采用双层Halbach永磁阵列,可以得到很高的气隙磁密正弦度。首先重点介绍了集成电感的无槽电机定子的结构,分析了漏感增加的机理。通过解析法得到了附加漏感的计算方法,并分析了附加漏感与定子结构尺寸的关系。其次介绍了双层Halbach永磁阵列的结构和特点。通过仿真分析,将新型电机与普通无槽电机的特性进行了对比,验证了增加漏感的优势。最后,制造了一台新型高速无槽永磁同步电机的样机,通过实验证明了新型电机的有效性。

Research on high speed slotless permanent magnet synchronous motor with a novel structure

A high-speed slotless permanent magnet synchronous motor with a novel structure was proposed for problem that inductance in high-speed slotless motor is generally small .A novel slotless structure with integrated inductance which is composed of two parts that a novel slotless core and the back around wind -ing was applied in stator and it could significantly increase leakage inductance of windings .The double layer Halbach array was applied in rotor to reduce the distortion of sinusoidal waveform of air gap flux density .Stator structure with integrated inductor was introduced and mechanism of the increase of the leakage inductance was analyzed .The analytical method of additional leakage inductance was obtained and the relation between additional leakage inductance and the measure of stator structure was analyzed . Structure and characteristics of double layer Halbach array was introduced .The characteristics of this no-vel motor and normal slotless motor were compared to verify advantage of increased leakage inductance .A prototype is manufactured and the effectivity of this novel motor was proved by experiment .