摘要
为提高无轴承开关磁阻电机(BSRM)的集成度和运行可靠性,探索无轴承电机的转子转角和径向位移的自检测方法,通过在BSRM非导通相的主绕组中注入高频脉冲信号,实现了同时检测转子的转角位置和径向位移的目的。一方面,利用绕组电流的斜率差值与绕组电感的关系,得到BSRM电感的实时分布信息,从而解算得到转子的实时转角位置。另一方面,通过检测悬浮绕组的感应电动势来获取主、悬浮绕组间的互感信息,利用互感与转子径向位置的关系,解算得到转子的实时径向位移。从而最终仅通过对主绕组注入一组高频脉冲来同时估测BSRM的转子转角和径向位移。实验结果证实了所提方法的有效性。
In conventional bearingless switched reluctance motors（ BSRMs）,some transducers should be installed to detect the rotor angle position and the shaft radial displacements to implement the rotation and magnetic levitation simultaneously. In order to improve the integration and reliability of BSRMs,the self-sensing method of the rotor angle position and radial displacements is investigated in this paper. The rotor angle position and radial displacements of BSRMs are estimated simultaneously through injecting a series of high-frequency voltage pulses into main windings of inactive phases. According to the relationship between the induced-current slope and the inductance,the real-time distribution of inductances could be obtained. As a result,the real-time angle position of BSRMs can be estimated. Meanwhile,mutual inductances can be obtained by detecting the induced electromotive force of levitation windings. Therefore,the radial displacements can also be calculated according to the relationship between the mutual inductances and radial displacements. Therefore,the proposed method can estimate the rotor angle position and radial displacements at the same time only by injecting one series of high-frequency voltage pulses into main windings. Experimental results verify the effectiveness of the proposed method.
出处
《电工技术学报》
EI
CSCD
北大核心
2017年第3期113-119,共7页
Transactions of China Electrotechnical Society
基金
国家自然科学基金青年科学基金项目(51107056)
国家自然科学基金面上项目(51477074)资助
关键词
无轴承开关磁阻电机
角度位置检测
径向位移检测
脉冲注入法
Bearingless switched reluctance motor
angle position detection
radial displacement detection
pulse injection method
