The Investigation of Strategy to Suppress Thrust Fluctuations in Electromagnetic Halbach Coreless Linear Motor

A newly designed electromagnetic Halbach-type coreless linear motor, developed independently, possesses advantages such as simple structure, flexible control, and high thrust density. However, factors like end effects, magnetic pole distribution, changes in normal attraction, and the influence of current harmonics can result in thrust fluctuations in this linear motor. In order to mitigate the impact of thrust fluctuations on the control of the linear motor, a speed/current dual-loop vector control strategy is employed to suppress the thrust fluctuations. In this study, a simulation model of the electromagnetic Halbach-type coreless linear motor with Halbach structure is established in the Ansys Maxwell 2D environment. External inverter circuits are constructed in Simplorer, and the vector control algorithm for the linear motor is implemented. The motor is subjected to co-simulation using Ansys Maxwell-Simplorer. Simulation results indicate that this approach effectively suppresses thrust fluctuations in the electromagnetic Halbach-type coreless linear motor.