Title :
A hybrid PWM strategy combining modified space vector and sinusoidal pulse width modulation methods
Author :
Wang Lei ; Hao Shuanghui ; Hao Minghui ; Song Baoyu
Author_Institution :
Sch. of Mechatron. Eng., Harbin Inst. of Technol., Harbin, China
Abstract :
In this paper, a method of combining modified space vector control (SVPWM) and sinusoidal pulse width modulation (SPWM) control has been proposed for the three-phase permanent magnet synchronous motor (PMSM). This method solves the problem of the torque ripple when the motor starts running and the hardness to control zero axis component when use SVPWM control method. The proposed method uses SPWM control method when the motor starts running or low speed to ensure the stability of the zero axis component of the control system, and utilize the SVPWM method when the motor at high speed to ensure the stability of the torque ripple of the system. So the method made full use of the advantages of SVPWM and SPWM method respectively. Dynamic response and power quality performance are comparatively analyzed for this method. This method uses PI- IP control structure to further improve the robustness of the control system and the response performance. The simulation and experimental results show the dynamic response of the control structure. In order to guarantee the validity of the data, utilize a high precision identification system to guarantee the precision of the parameter used in control system. This paper gives a detailed description of how to use the method mentioned to realize the PWM output and the control structure used. This method is more efficiently and generates less harmonic distortion when compared with traditional method.
Keywords :
PI control; dynamic response; harmonic distortion; machine vector control; permanent magnet motors; pulse width modulation; stability; synchronous motors; torque control; PI-IP control structure; PMSM; SPWM control; SVPWM control method; control system; dynamic response; harmonic distortion; high precision identification system; hybrid PWM strategy; modified space vector control; permanent magnet synchronous motor; power quality performance; sinusoidal pulse width modulation control; sinusoidal pulse width modulation methods; torque ripple; AC motors; Control systems; Space vector pulse width modulation; Switching circuits; Transistors; Vectors; identification system; proportion - integration (PI) and integration - proportion (IP); sinusoidal pulse width modulation (SPWM); space vector PWM (SVPWM);
Conference_Titel :
Intelligent Control and Automation (WCICA), 2014 11th World Congress on
DOI :
10.1109/WCICA.2014.7053459