Artificial Neural Network based controller design for SMPS

This paper presents a novel approach to design a controller for a half-bridge converter based Switched Mode Power Supply of 150W rating. A half-bridge converter is designed for obtaining a stiffly regulated DC output voltage of 5V irrespective of load and supply voltage variations, with an artificial neural network (ANN) based controller. The duty ratio of the controller is determined by this ANN depending on the input voltage and the output load conditions. Data collection for training the ANN was done using a PID controller-based approach in which the transfer function for the SMPS was derived by performing the large signal and small signal analyses and appropriate parameter values for the PID controller were calculated. For different load and input supply voltage conditions, the output voltage was regulated by making use of the PID controller and appropriate duty ratios were arrived at. These 150 data points were used for the training the proposed ANN with four hidden layers. The trained neural network was further utilized in arriving at the duty ratio value directly by sensing the input voltage and load current and it is found to yield stiffly regulated voltage irrespective of supply voltage and load variations where the error is within 8 %.

[1]  I. Barbi,et al.  A unity power factor multiple isolated outputs switching mode power supply using a single switch , 1991, [Proceedings] APEC '91: Sixth Annual Applied Power Electronics Conference and Exhibition.

[2]  John Y. Hung,et al.  PID controller modifications to improve steady-state performance of digital controllers for buck and boost converters , 2002, APEC. Seventeenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.02CH37335).

[3]  A. Prodic,et al.  Limit-Cycle Based Auto-Tuning System for Digitally Controlled Low-Power SMPS , 2006, Twenty-First Annual IEEE Applied Power Electronics Conference and Exposition, 2006. APEC '06..

[4]  P. Mattavelli,et al.  Self-Programmable PID Compensator for Digitally Controlled SMPS , 2006, 2006 IEEE Workshops on Computers in Power Electronics.

[5]  Masahiro Sasaki,et al.  Novel digital controller for the PWM and/or PFM controlled switching DC-DC converters , 1998, INTELEC - Twentieth International Telecommunications Energy Conference (Cat. No.98CH36263).

[6]  Abraham Pressman,et al.  Switching Power Supply Design , 1997 .

[7]  Malik Elbuluk,et al.  Fundamentals of Power Electronics , 2013 .

[8]  B. Allard,et al.  Digital control strategies for switch-mode power supply , 2006, IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics.

[9]  S. Saggini,et al.  Autotuning of Digitally Controlled Buck Converters Based on Relay Feedback , 2005, 2005 IEEE 36th Power Electronics Specialists Conference.

[10]  Jaime Arau,et al.  150 watts switched mode power supply for personal computers applications with power factor correction , 1994, 3rd International Power Electronic Congress. Technical Proceedings. CIEP '94.

[11]  Hossin Hosseinian,et al.  Power Electronics , 2020, 2020 27th International Conference on Mixed Design of Integrated Circuits and System (MIXDES).