Indian Journal of Science and Technology
DOI: 10.17485/ijst/2016/v9i38/101940
Year: 2016, Volume: 9, Issue: 38, Pages: 1-9
Original Article
Joseph Anthony Prathap1*, T. S. Anandhi1 and T. S. Sivakumaran2
1 Department of Electronics and Instrumentation Engineering, Annamalai University, Annamalai Nagar, Chidambaram - 608002, Tamil Nadu, India; [email protected]
[email protected]
2 Department of Electrical and Electronics Engineering, Arunai Engineering College, Velu Nagar, Tiruvannamalai - 606603, Tamil Nadu, India; [email protected]
*Author for correspondence
Joseph Anthony Prathap
Department of Electronics and Instrumentation Engineering
Email:[email protected]
Objectives: In this paper, a Field Programmable Gate Array (FPGA) based real time implementation of a closed loop controller for regulating the load voltage under line and load disturbances by generating Digital Pulse Width Modulation (DPWM) is developed. Digital Proportional Integral (DPI) controller is designed to generate the DPWM. Methods: DPWM are developed by two methods: Counter based and Delay line based. The closed loop DPWM activated DC-DC buck converter is simulated using MODELSIM and tested in real time using Xilinx Spartan 3A DSP FPGA. Findings: Hardware results show the regulated load voltage by updating the DPWM control signal duty cycle to compensate the line and load disturbances. FPGA based DPWM provides less complexity in design. Improvements: Hybrid based DPWM method with closed loop control for DC-DC Buck converter could be used for voltage regulation
Keywords: Closed Loop Controller, Digital PI, DPWM, FPGA
Subscribe now for latest articles and news.
