Sliding mode-based velocity and torque controllers for permanent magnet synchronous motor drives system

Abstract

To minimise the torque ripple for vector control of interior permanent magnet synchronous motor (IPMSM) of railway traction system, this study proposes a new velocity, torque and current three-loop control system, and designs a velocity and torque sliding mode controller (SMC) for permanent magnet synchronous motor (PMSM) driven system. First, the mathematical model of IPMSM is described and the new velocity and torque closed-loop control system for PMSM is designed. Second, the velocity SMC and torque SMC are designed. The fast convergence of the motor velocity and torque is realised, and the torque ripple is reduced effectively. The stability of the designed SMC is analysed. Finally, the effectiveness of the proposed scheme was compared with PI by simulations and experiments. The results show that the proposed method has good control performance and strong robustness.

Keywords

• torque
• closed loop systems
• machine control
• synchronous motors
• torque control
• permanent magnet motors
• variable structure systems
• synchronous motor drives
• angular velocity control
• designed smc
• motor velocity
• torque smc
• velocity smc
• torque closed-loop control system
• pmsm
• permanent magnet synchronous motor driven system
• torque sliding mode controller
• current three-loop control system
• railway traction system
• ipmsm
• interior permanent magnet synchronous motor
• vector control
• torque ripple
• permanent magnet synchronous motor drives system
• torque controllers