悬浮绕组直流励磁型无轴承磁通切换电机转矩与悬浮力直接控制

Direct Control of Torque and Suspension Force of DC Excitation Bearingless Flux Switching Motor with Suspension Winding

周祎豪 ¹周扬忠 ¹张竞 ¹黄郑凯¹

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作者信息

1. 福建省新能源发电与电能变换重点实验室(福州大学),福州 350116
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摘要

针对悬浮绕组直流励磁型双绕组12/10极U型定子铁芯无轴承磁通切换电机BFSPMM(bearingless flux switching permanent magnet motor)提出1种直接控制策略.首先,分析转子偏心对电机数学模型的影响并构建偏心情况下的双绕组BFSPMM数学模型;然后,根据机电能量转换原理推导双绕组无轴承磁通切换电机的转矩数学模型并构建基于空间矢量脉宽调制SVPWM(space vector pulse width modulation)的直接转矩控制;最后,运用虚位移法得到悬浮力数学模型,通过SVPWM合成的电压矢量对悬浮绕组磁链的进行精确控制,实现对悬浮力的直接控制.实验结果表明,转子可以稳定悬浮且悬浮力与转矩可以独立控制,说明系统具有良好的动静态特性.

Abstract

A direct control strategy is proposed for a suspension winding DC excitation double-inding bearingless flux switching permanent magnet motor(BFSPMM)with 12/10 pole U-type stator core.First,the influence of rotor eccentricity on the mathematical model of the motor is analyzed,and a double-winding BFSPMM mathematical model under the condition of eccentricity is constructed.Then,a mathematical model of the torque of double-winding bearingless flux switching motor is derived according to the principle of electromechanical energy conversion,and the direct torque control based on space vector pulse width modulation(SVPWM)is constructed.Finally,the virtual displacement method is used to obtain the mathematical model of suspension force,and the voltage vector synthesized by SVPWM is used to precisely control the flux of suspension winding,thus realizing the direct control of suspension force.Experimental results show that the rotor can be suspended stably,and the suspension force and torque can be controlled independently,indicating that the system has good dynamic and static characteristics.

关键词

无轴承磁通切换电机/悬浮绕组直流励磁/空间矢量脉宽调制/直接转矩控制/直接悬浮力控制

Key words

Bearingless flux switching motor/DC excitation of suspension winding/space vector pulse width modulation(SVPWM)/direct torque control/direct suspension force control

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出版年

2024

电源学报

中国电源学会,国家海洋技术中心

电源学报

北大核心

影响因子：0.7

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