Design of PMSM Regulator Based on Improved Marine Predator Algorithm

Aiming at the permanent magnet synchronous motor(PMSM) vector control system speed outer loop using fractional-order proportional-integral(FOPI) regulator is difficult to meet the requirements of the system dynamic response speed, robustness and so on, it is proposed to optimize the parameters of the FOPI regulator by using the marine predator algorithm(MPA). The optimal combination of regulator parameters is obtained by searching for the location of the predator with the optimal fitness, in which the target fitness function selection is commonly used to integrate the servo system evaluation index time multiplied by the absolute value of the error. With the goal of improving the efficiency of MPA, its position update formula is improved. Experimental comparison of the motor speed regulation performance of MPA regulation FOPI, improved MPA regulation FOPI. The PMSM servo system test platform with TMS320F28335 as the core is built for verification. Compared with the MPAFOPI regulator, the system with the improved MPAFOPI regulator shows the advantages of better dynamic response of rotational speed and better disturbance immunity, which demonstrates its advantages in the direction of electric drive such as new energy vehicles. The experimental results show that the modified MPAFOPI regulator has the advantages of enhanced system robustness and reduced overshoot.