不同气隙高度下高温超导直线电机样机的性能

Performance of a High-T_c Superconducting Linear Synchronous Motor Prototype at Different Mechanical Apertures

本研究设计制作的高温超导直线同步电机样机中,次级使用由Y-Ba-Cu-O带材绕制成的4个跑道型硅钢芯超导线圈,以传统的铜线绕组作为初级,其中4个次级超导线圈串联并在其背部附加铁轭。通过改变初次级间的气隙,研究了不同气隙高度下该样机的推进力和法向力。结果表明,在气隙高度较低时,推进力随着气隙的增大迅速衰减,而气隙高度较高时,推进力的衰减减弱。并且本直线电机样机的推进力密度为117 N/m,而只用了不到16 m长的超导带材。可为今后大型直线同步电机的设计提供参考。

A linear synchronous motor prototype consisting of an excitation system made of high-Tc superconducting （HTS） coated conductor wire coils with silicon steel core and a conventional cooper coil wound armature stator has been constructed and tested.The performance of the prototype system operated at different air gaps reflecting real life operating conditions was focused on.The dependence of the reduction of the thrust and normal forces with respect to the increasing of the air gap was presented.Thrust decays rapidly with increasing air gap at low magnetic gap while having a weak decay at higher magnetic gap.The highest recorded peak thrust is 117 N/m for a magnetic gap of 15 mm,and this is achieved with less than 16 m of HTS coated conductor.This work has helped to better design superconducting linear synchronous motors.