Design of digital vector controller for PMSM based on TMS320F28335
CHEN Gao, YANG Jiaqiang
(College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)
Abstract: In order to improve the performance of vector controller, a digital vector controller for permanent magnet synchronous motor (PMSM) based on floatpoint digital signal processor(DSP) TMS320F28335 was designed. Compared with the conventional  PMSM control system based on fixedpoint DSP such as TMS320LF2407 and TMS320F2812, it had advantages in programming, computing speed and accuracy of A/D. The main circuit used the ACDCAC topology structure. The voltage, current signals were sampled by internal A/D of TMS320F28335. Speed and position were measured in the enhanced quadrature encoder pulse (EQEP) module based on incremental photoelectric encoder. And software and hardware double protection circuits were designed. The highprecision space vector pulse width modulation(SVPWM) signals can be generated flexibly in the enhanced pulse width modulator (EPWM) module. The experimental results indicate that this control system has advantages of simple programming, fast computing speed and flexible control.
Key words:  permanent magnet synchronous motor (PMSM);digital signal processor(DSP) ; vector controller; enhanced quadrature encoder pulse (EQEP) ;space vector pulse width modulation(SVPWM)