Adaptive Backstepping Sliding Mode Control of PWM Buck DC-DC Converters

• Main Authors: Shoei-Chuen Lin, 林水春
• Other Authors: Prof Ching-Chih Tsai
• Format: Others
• Language: en_US
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/81375244215126509093

碩士 === 國立中興大學 === 電機工程學系 === 91 === Abstract This thesis develops methodologies and techniques for design and implementation a buck DC-DC converter using a digital signal processor (DSP). The converter is modeled as a linear averaged system with changeable loads. Two models with different chosen state variables are employed to design the backstepping sliding mode controllers for the buck DC-DC converter; the first one has the two state variables of and , and the second one has the two state variables of and . Using singular perturbation method, the reduced order model is derived in order to show that the effect of can be ignored and the buck DC-DC converters can be well approximated by the reduced order model. Based on the reduced order model, novel control approaches are proposed to control a single and parallel-connected buck DC-DC converters. Furthermore, the adaptive backstepping sliding mode control approaches are presented for the output voltage regulation of these buck DC-DC converters, if their system parameters are unknown. These proposed control methods have been verified by computer simulation and implemented utilizing a standalone digital signal processor (DSP) TMS320C542 from Texas Instruments. Experimental results show that the proposed control method is proven to be capable of given satisfactory control performance.