Improved second-order active-disturbance-rejection direct rotating speed control method for ship permanent magnet synchronous motor

• Main Authors: WEI YI, ZHANG QIAOFEN, GUO HAOHAO, ZHANG QINJIN, LIU YANCHENG, REN JIANING, XIANG TIANXIANG, LIU SIYUAN, ZHANG FENGKUI, GU DEFU
• Format: Patent
• Language: Chinese; English
• Published: 24.11.2023
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

The invention discloses an improved second-order active-disturbance-rejection direct rotation speed control method for a permanent magnet synchronous motor, and the method comprises the steps: arranging a transition process for a motor rotation speed given signal through employing a tracking differentiator, and obtaining a transition given signal and a differential signal of the rotation speed; according to a second-order motion equation of a motor, a rotating speed loop and a current loop are combined to be regarded as a second-order controlled object, a third-order expansion state observer structure is designed and improved, a proportional-integral link is used for replacing an original single-integral link to observe system state variables, and a disturbance observation link is reconstructed. An improved second-order active-disturbance-rejection controller is adopted to directly output reference voltage to adjust the rotating speed of the motor, a q-axis current feedback link is cancelled, and the dependen