Method for improving dynamic response performance of permanent magnet synchronous motor

• Main Authors: WANG XIAOHONG, GAO XIAOJUN, LIU MANXI, XU CHUYAN, ZHOU XINDONG
• Format: Patent
• Language: Chinese; English
• Published: 28.03.2023
• 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 a method for improving the dynamic response performance of a permanent magnet synchronous motor, and the method comprises the following steps: S1, carrying out the current sampling at 0 and sum of a current loop carrier period in a permanent magnet synchronous motor system, and enabling Tc to be the carrier period; s2, a three-phase PWM duty ratio is obtained through calculation; and S3, the three-phase PWM duty ratio is compared with a duty ratio threshold value, when the three-phase PWM duty ratio is smaller than the duty ratio threshold value, output is updated through the three-phase PWM duty ratio, and when the three-phase PWM duty ratio is larger than or equal to the duty ratio threshold value, output is updated through the duty ratio threshold value. According to the method for improving the dynamic response performance of the permanent magnet synchronous motor, four times of current sampling and four times of PWM updating are carried out in the single carrier period of the curr