Antiwindup design for the speed loop PI controller of a PMSM servo system

Authors : Ming YANG, Li NIU, Dianguo XU

Pages : 1318-1327

Doi:10.3906/elk-1112-25

View : 12 | Download : 8

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :A novel antiwindup insert ignore into journalissuearticles values(AW); strategy for a proportional-integral insert ignore into journalissuearticles values(PI); regulator based on the back-calculation method is presented. The proposed method will calculate the gain of the back-calculation based on the input and output status of the PI regulator without the requirement of motor parameters, such as the inertial and torque-current coefficient, and the back-calculation gain will vary with the speed command in order to obtain the optimal dynamic performance. The proposed method avoids the problem caused by the fixed back-calculation gain in the classical AW strategy, and prevents the system from untimely saturation withdrawing or an unexpected overshoot due to the inappropriate back-calculation gain, respectively. The proposed AW strategy is compared with the classical AW design by simulation and experiment on an application platform of a permanent magnet synchronous motor servo system. A PI controller with the proposed AW design will decrease the overshoot with a small settling time of the system`s step-response, which can be observed obviously in wide dynamic variation. It reduces the difficulty of the parameter tuning for the PI controller.
Keywords : PMSM, antiwindup, integration saturation, PI controller