scholarly journals Input-output based quasi-sliding mode control of DC-DC converter

2012 ◽  
Vol 25 (1) ◽  
pp. 69-80 ◽  
Author(s):  
Darko Mitic ◽  
Dragan Antic ◽  
Marko Milojkovic ◽  
Sasa Nikolic ◽  
Stanisa Peric
Keyword(s):  
Discrete Time ◽  
Output Voltage ◽  
Control Algorithm ◽  
Sliding Mode ◽  
Buck Converter ◽  
Sliding Mode Controller ◽  
Input Output ◽  
Load Variations ◽  
Voltage Controller ◽  
Derivatives Of

The paper presents the design of discrete-time quasi-sliding mode voltage controller for DC-DC buck converter. The control algorithm is realized by measuring only sensed output voltage. No current measurements and time derivatives of output voltage are necessary. The proposed quasi-sliding mode controller provides stable output voltage, exhibiting robustness to parameter and load variations.

scholarly journals Digital Control of a Buck Converter Based on Input-Output Linearization. An Interpretation Using Discrete-Time Sliding Control Theory

Energies ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 2738
Author(s):  
Enric Vidal-Idiarte ◽  
Carlos Restrepo ◽  
Abdelali El Aroudi ◽  
Javier Calvente ◽  
Roberto Giral
Keyword(s):  
Discrete Time ◽  
Digital Control ◽  
Output Voltage ◽  
Power Converter ◽  
Current Control ◽  
Buck Converter ◽  
Control Loop ◽  
Input Output ◽  
Analysis And Design ◽  
Input Output Linearization

This paper presents the analysis and design of a PWM nonlinear digital control of a buck converter based on input-output linearization. The control employs a discrete-time bilinear model of the power converter for continuous conduction mode operation (CCM) to create an internal current control loop wherein the inductor current error with respect to its reference decreases to zero in geometric progression. This internal loop is as a constant frequency discrete-time sliding mode control loop with a parameter that allows adjusting how fast the error is driven to zero. Subsequently, an outer voltage loop designed by linear techniques provides the reference of the inner current loop to regulate the converter output voltage. The two-loop control offers a fast transient response and a high regulation degree of the output voltage in front of reference changes and disturbances in the input voltage and output load. The experimental results are in good agreement with both theoretical predictions and PSIM simulations.

scholarly journals A New Sliding Mode Controller for DC/DC Converters in Photovoltaic Systems

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
M. Sarvi ◽  
I. Soltani ◽  
N. NamazyPour ◽  
N. Rabbani
Keyword(s):  
Control Method ◽  
Sliding Mode ◽  
Input Voltage ◽  
Buck Converter ◽  
Point Of View ◽  
Sliding Mode Controller ◽  
Power Sources ◽  
Load Variations ◽  
Solar Arrays ◽  
Current Characteristics

DC/DC converters are widely used in many industrial and electrical systems. As DC/DC converters are nonlinear and time-variant systems, the application of linear control techniques for the control of these converters is not suitable. In this paper, a new sliding mode controller is proposed as the indirect control method and compared to a simple direct control method in order to control a buck converter in photovoltaic applications. The solar arrays are dependent power sources with nonlinear voltage-current characteristics under different environmental conditions (insolation and temperature). From this point of view, the DC/DC converter is particularly suitable for the application of the sliding mode control in photovoltaic application, because of its controllable states. Simulations are performed in Matlab/Simulink software. The simulation results are presented for a step change in reference voltage and input voltage as well as step load variations. The simulations results of proposed method are compared with the conventional PID controller. The results show the good performance of the proposed sliding mode controller. The proposed method can be used for the other DC/DC converter.

scholarly journals SMC CONTROL APPLIED TO A BUCK CONVERTER: COMPARISON TO A PID CONTROLLER

2020 ◽  
Vol 9 (9) ◽  
pp. 82-90
Keyword(s):  
Pid Controller ◽  
Output Voltage ◽  
Sliding Mode ◽  
Buck Converter ◽  
Sliding Mode Controller ◽  
Experimental Setup

This paper aims to control the output voltage of a buck converter using a Sliding Mode Controller (SMC) on an AVR experimental setup. The controller has been implemented with SIMULINK followed by simulations in order to check its convergence and to compare SMC’s robustness to PID’s. We have shown that the designed SMC reaches convergence and is more robust than the classic PID controller. We also pointed out that the robustness of the SMC is widely variable from one noised parameter in the Buck converter model to another. Complementary work can be done to explain this variation of the robustness offered by the SMC.

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