Minimum-Spacing Optimized Winding Switching Control for Winding-Segmented PMLSM With Multiple Movers

The winding-segmented permanent magnet linear synchronous motor (WS-PMLSM) system adopts a modular mover-stator topology, offering advantages such as high load capacity and high-precision positioning. Traditional strategy typically employs a synchronous current drive method for dual-stator units, which mandates the minimum spacing of multiple movers exceeding the length of two stator units. To minimize the spacing constraints between the movers, this article proposes an optimized stator winding switching control strategy based on single/dual-stator winding drive modes. First, an analytical electromagnetic thrust model of WS-PMLSM is established based on the magnetic energy principle. Second, for the single-stator winding drive mode, a current feedforward control strategy is proposed to compensate for the electromagnetic force disturbance between adjacent segments. Furthermore, based on the coupling length between the mover and stator windings, an optimized winding switching strategy with linear transition switching method is proposed to reduce the thrust ripple. Finally, a WS-PMLSM experimental platform is built to validate the effectiveness of the proposed control strategy.