Dualloop control system of DC servo motor based on DSP

HU Wei，RUAN Jian，LI Sheng，WANG Xiaowen，SHAO Hanqing

(College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014,China)

Abstract:  As the electromechanical converter of digital valve, performance of the digital valve had been great impacted by frequency response of motorAiming at the improvement on dynamic response of digital valve, a dualloop control system of DC motor was designedTMS320LF2812 was selected as the core control element in this systemBased on pulse width modulation(PWM) control,by adding lead compensation network, the bandwidth of current loop  was increased, position rotor precisely with PI control algorithm was realized The hardware and software design solutions for this system were introduced The experimental results show that DC servo motor system can achieve the current and position control, frequency response of current loop has been significantly increased

Key words: DC motor; pulse width modulation(PWM); frequency response