电工技术学报2018，Vol.33Issue(9)：1946-1956,11.DOI:10.19595/j.cnki.1000-6753.tces.170225
考虑涡流的自传感主动电磁轴承转子位置估计策略
Rotor Position Estimation Strategy for Self-Sensing Active Magnetic Bearing Considering Eddy Currents
摘要
Abstract
The self-sensing active magnetic bearing (SAMB), which doesn't need independent displacement sensors anymore, owns the benefits of low cost, high integration level and compact structure than the conventional AMB. The key of this technique is to accurately estimate the rotor position from measurable physical variables like coil voltage and current of the MB actuators. Eddy current, as an important nonlinear factor of magnetic bearing, will affect the accuracy and linearity of self-sensing rotor position estimation and even the implementability of self-sensing magnetic bearing. In this paper, we firstly investigate the advantages of using laminated core rather than solid core for the SAMB, through the sensitivity between magnetic bearing inductance and air gap variation under eddy current. Then a single-turn virtual coil model is utilized to analyze the effect of eddy current on the properties of switching ripple currents in laminated core magnetic bearing, so that a self-sensing rotor position estimation method based on switching ripple currents modulation is proposed, with the eddy current considered. Finally, the proposed self-sensing rotor position estimation method is validated on a rigid rotor-four DOF radial SAMB platform.关键词
自传感/主动电磁轴承/涡流/开关电流纹波Key words
Self-sensing/active magnetic bearing/eddy currents/switching current ripples分类
信息技术与安全科学引用本文复制引用
于洁,祝长生,余忠磊..考虑涡流的自传感主动电磁轴承转子位置估计策略[J].电工技术学报,2018,33(9):1946-1956,11.基金项目
国家自然科学基金项目(11632015、51477155)、浙江省自然科学基金项目(LZ13E070001)及先进航空发动机协同创新中心项目资助. （11632015、51477155）
