Research on Thrust Characteristics and Optimization of Thrust Ripple of Coreless Superconducting Linear Synchronous Motor

As a special form of linear motor, coreless superconducting linear synchronous motor (SCLSM) has the advantages of small thrust ripple and high control precision. Because of the structure of the primary without iron core, the thrust ripple caused by the end effect and the cogging effect is eliminated, but the thrust ripple caused by the primary winding discontinuity still exists. Based on three-dimensional electromagnetic field modeling and Maxwell tensor method, a three-dimensional electromagnetic force calculation method of coreless SCLSM is proposed. The thrust characteristics of the motor are analyzed, and a thrust ripple optimization method is proposed, which can effectively reduce thrust ripple caused by the discontinuity of the primary winding.