The Study on PMSM Fuzzy Control in the Marine Electric Propulsion System

Abstract

Speed-regulation characteristic of PMSM (permanent magnet synchronous motor) in marine electric propulsion system is studied in this paper. Governing method based on vector control is analyzed according to the mathematical model in two-phase rotating coordinate system. After that, a noble PID control strategy which raises dual closed-loop i.e. speed loop and stator current loop is proposed based on fuzzy control theory. Speed deviation and its rate are taken as inputs for adjustment of the PID controller. The strategy proposed in this paper improves the response of system, static and dynamic characteristics of PMSM servo system as well as anti-jamming capability. Finally, simulation results from Simulink show the correctness and realizability of our system.