Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Research on auto coupling PID direct torque control strategy of permanent magnet synchronous motor
| DOI: | 10.11809/bqzbgcxb2025.03.024 |
| Keywords: | PMSM; DTC; auto coupling PID; speed factor; robustness against disturbances |
| Abstract: | Aiming at the problems of high torque and flux ripple, poor robustness, and other issues in direct torque control of permanent magnet synchronous motors, a new type of Auto coupling PI direct torque control method is proposed based on the theory of Auto coupling PID control. This method defines all complex factors such as known or unknown internal dynamics, external disturbances, and model uncertainty of the speed loop, flux loop, and torque loop as three total disturbances, and introduces virtual control variables in the speed control loop to obtain the q axis virtual torque command. Furthermore, the PMSM control system is equivalently mapped to a linear disturbance system, constructing a controlled error system under total disturbance excitation. Based on this, an Auto coupling PI controller based on speed factor was designed. The simulation experimental results show that the Auto coupling PI control method has fast response speed, no overshoot, no oscillation dynamic quality, high control accuracy, and strong anti interference steady state performance. |
| Issue: | Vol. 46 No. 3 (2025) |
| Published: | 2025-03-31 |