Current error vector based prediction control of the section winding permanent magnet linear synchronous motor

To include features such as greater thrust density, higher efficiency without reducing the thrust stability, this paper proposes a section winding permanent magnet linear synchronous motor (SW-PMLSM), whose iron core is continuous, whereas winding is divided. The discrete system model of the motor is derived. With the definition of the current error vector and selection of the value function, the theory of the current error vector based prediction control (CEVPC) for the motor currents is explained clearly. According to the winding section feature, the motion region of the mover is divided into five zones, in which the implementation of the current predictive control method is proposed. Finally, the experimental platform is constructed and experiments are carried out. The results show: the current control effect has good dynamic response, and the thrust on the mover remains constant basically.

► The structure of the permanent magnet linear synchronous motor (SW-PMLSM) is new.
► A new current control method CEVPC is employed in this motor.
► The sectional power supply method is different to the others and effective.
► The performance gets worse with voltage and current limitations.