Development of Slotless Single-Drive Bearingless Permanent Magnet Motor with Aerostatic Bearings for High-Speed Applications
Development of Slotless Single-Drive Bearingless Permanent Magnet Motor with Aerostatic Bearings for High-Speed Applications
复制标题
用于高速应用的带空气静压轴承的无槽单驱动无轴承永磁电机的开发
DOI：
10.1109/tia.2023.3268998
复制
发表时间：
2023
影响因子：
4.4
通讯作者：
Junichi Asama
中科院分区：
文献类型：
--
作者：
Naruoka Masaru;Goto Yusuke;Weimerskirch Henri;Mukai Takashi;Sakamoto Taichi;Sakamoto Kentaro Q.;Sato Katsufumi;Junichi Asama
对于电动机，必须限制三个平移（x-y-z）和两个倾斜（θx-θy）转子运动。球轴承通常用于限制运动;但是，它们不能应用于具有大DN（轴承直径和速度的乘积）值的高速电机。本研究中的转子在径向（x-y）和倾斜（θx-θy）运动中具有空气静压轴承支撑。然而，如果将额外的磁轴承或致动器应用于电动机以进行轴向运动控制（z），则电动机尺寸和轴长度增加。为了避免这个问题，本文提出了一种新型的无轴承电机结构与磁集成轴承功能。该结构将扭矩产生（θz）和轴向力产生（z）的功能结合在一个单元中。它只使用一组三相无槽绕组和三相电压源逆变器。这种无轴承电机被称为单驱动无轴承电机。d轴和q轴电流分别调节轴向悬挂力和扭矩。本文介绍了它的结构、工作原理、三维有限元计算结果和实验结果。所制造的轴径为30 mm的无轴承电机原型可以主动控制转子在60，000 rpm下的轴向运动，即aDN值为1，800，000。
For electrical motors, three translational (x–y–z) and two tilting (θx–θy) rotor motions must be restricted. Ball bearings are commonly used to restrict motion; however, they cannot be applied to high-speed motors with largeDN(product of bearing diameter and speed) values. The rotor in this study has an aerostatic bearing support in radial (x–y) and tilting (θx–θy) motions. However, if an additional magnetic bearing or actuator is applied to the motor for axial motion control (z), the motor size and shaft length increases. To avoid this problem, a novel bearingless motor structure with a magnetically integrated bearing function is proposed in this paper. The structure combines the functions of both torque production (θz) and axial force generation (z) in one unit. It uses only a set of three-phase slotless windings and three-phase voltage source inverter. Such bearingless motors are referred to as single-drive bearingless motors. Thed-axis andq-axis currents regulate the axial suspension force and torque, respectively. This paper presents the structure, operation principle, 3D-finite element calculation results, and experimental results. The fabricated prototype bearingless motor with a shaft diameter of 30 mm can actively control the axial motion of the rotor at 60,000 rpm, that is, with aDNvalue of 1,800,000.