Research and Simulation of Asynchronous Motor Position Servo Control System Based on SVPWM
In the AC motor frequency conversion speed regulation, pwm control has been widely used, among which the classic sinusoidal pulse width modulation (spwm), which mainly focuses on making the output voltage of the inverter as close as possible to the sine wave, making the base of the pwm voltage wave. The wave component is as large as possible, and the harmonic components are as small as possible, but the method is only an approximation, and the ability to suppress harmonics is limited. The voltage space vector pulse width modulation (svpwm) is to treat the inverter and the motor as one body, and control the motor to obtain a circular rotating magnetic field with a constant amplitude. It can significantly reduce the harmonic components of the inverter's output voltage and the harmonic loss of the motor, reducing the ripple of the torque. In this paper, based on the vector control and svpwm modulation principle, the simulation model is established, and the key problems and simulation results in the simulation are analyzed.
Establishment of system simulation model
Position, speed and current pi regulator
Conclusion
The simulation results show that the system has good dynamic followability under load conditions and can reach stable operation state quickly. It also proves the feasibility of the position servo vector control system designed in this paper.
