Augmentation of Propulsion Based on Coil Array Commutation for Magnetically Levitated Stage

作者：Zhu Yu; Zhang Shengguo^*; Mu Haihua; Yang Kaiming; Yin Wensheng

来源：IEEE Transactions on Magnetics, 2012, 48(1): 31-37.

DOI：10.1109/TMAG.2011.2166559

• Augmentation of propulsion
• capacity of coil power amplifiers
• commutation of coil array
• current bounding
• force/torque-decomposing model
• magnetically levitated stage

This paper focuses on augmenting the propulsion via commutation of coil array for the long-stroke magnetically levitated stage with moving coils, whose mechatronics structure have been defined. The used commutation of coil array is based on the analytical force/torque-decomposing model of the stage and it is characterized by bounding the coil currents. Through this current-bounded commutation, the 1-norm of commutated coil current vector is increased so that the propulsion can be augmented, and simultaneously the infinite norm of commutated coil current vector is limited so that the amplitudes of commutated coil currents are not beyond the capacity of selected coil power amplifiers. By the investigation example of a long-stroke magnetically levitated stage with moving coils, it is theoretically verified that the propulsion (acceleration) can be augmented by 125% as well as the commutated coil currents can be kept within the capacity of selected coil power amplifiers, 3 A. The study results indicate that the propulsion of a magnetically levitated stage can be augmented via current-bounded commutation of coil array rather than via reconfiguring the mechatronics structure of stage or reselecting coil power amplifiers of larger capacity.

• 出版日期2012-1
• 单位清华大学