Three-Coil Combined Winding Configuration for a 2-DOF Actively Controlled Bearingless Permanent Magnet Motor
Three-Coil Combined Winding Configuration for a 2-DOF Actively Controlled Bearingless Permanent Magnet Motor
复制标题
二自由度主动控制无轴承永磁电机的三线圈组合绕组配置
DOI：
10.1109/tia.2021.3078665
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发表时间：
2021
影响因子：
4.4
通讯作者：
Chiba Akira
中科院分区：
文献类型：
--
作者：
Asama Junichi;Chiba Akira
本文描述了一种简单的组合绕组结构，用于六槽/六极永磁体(PM)结构的两自由度控制的无轴承电机。这种无轴承永磁电机只有三个集中线圈，交替缠绕在定子的六个齿上，并且只有一个三相逆变器用于两自由度径向磁悬浮和单相电机驱动。理论计算和有限元分析表明，所提出的三绕组组合绕组结构分别产生四极旋转磁场和六极交变磁场，以产生径向悬浮力和转矩。为了验证所提出的配置，我们制造并测试了一台直径58 mm、高度5 mm的外转子无轴承永磁电机。成功地将转子悬浮并以7500r/min的速度驱动。对所提出的组合式绕组结构和先前开发的分离式绕组结构的计算结果和测量结果进行了比较。与分离绕组相比，合绕组电机效率提高了5%，铜耗降低。
This article describes a simple combined winding configuration for a two-degrees-of-freedom (DOF) controlled bearingless motor with a six-slot/six-pole permanent magnet (PM) structure. This bearingless PM motor only has three concentrated coils that are wound alternately on six teeth of the stator and uses only one three-phase inverter for both the 2-DOF radial magnetic suspension and single-phase motor drive. The theoretical calculation and finite-element method analysis demonstrated that the proposed three-coil combined winding configuration generates a four-pole rotating field and a six-pole alternating field for generating the radial suspension force and torque, respectively. To verify the proposed configuration, we built and tested an outer-rotor-bearingless PM motor with a diameter of 58 mm and a height of 5 mm. The rotor was successfully levitated and driven at 7500 r/min. The calculated and measured results were compared for both the proposed combined winding configuration and the previously developed separated winding configuration. The measured motor efficiency of the prototype with the combined winding at 5000 r/min with 20 mN·m output is improved by 5% when compared with the separated winding owing to the copper loss reduction.