scholarly journals Control of Bifurcation Behaviour of the Buck Converter via a Resonant Parametric Perturbation Circuit

2015 ◽  
Vol 76 (1) ◽  
Author(s):  
Ir. Dr Ng Kok Chiang ◽  
Dr Michelle Tan Tien Tien ◽  
Dr Nadia Tan Mei Lin
Keyword(s):  
Power Electronics ◽  
Control Method ◽  
Input Voltage ◽  
Buck Converter ◽  
Parametric Perturbation ◽  
Complex Behaviour ◽  
Active Involvement ◽  
Systems Research ◽  
Non Linear ◽  
Bifurcation Behaviour

Nonlinear circuits and systems research has been growing very quickl y over the past two decades. Activel y pursued in almost every branch of science and engineering, nonlinear systems theory luis found wide applications in a variety of practical engineering problems. Engineers, scientists and mathematicians have similarly advanced from the passive role of simpl y anal yzing, or identifying chaos to their present, active involvement in controlling chaos — control directed not onl y at suppression, but also at exploiting its enormous potential. We now stand at the threshold ofmajor advances in the control and synchronization of cluios for new applications across the range of engineering disciplines. All feedback controlled power converters exhibit certain non-linear phenomena over a specific breadth of parameter values. Despite being commonly encountered hy power electronics engineers, these non-linear phenomena are by and large not thoroughl y understood by engineers. Such phenomena remaining somewhat mysterious and hardl y ever been examined in a formal way. As the discipline of power electronics becomes more matured, demand for better functionality, dependability and performance of power electronics circuits will inevitably force researchers to engage themselves in more detailed stud y and analysis of non-linear phenomena and complex behaviour of power electronics converters. The bifurcation behaviour of the back converter occurs when the input voltage is varied. In this study, the computer simulation scheme, PSPICE is employed to model the behaviour of the ideal back converter. For certain values of the input voltage Vin instability occurs. The resonant parametric perturbation method is then applied to control the bifurcation behaviour of the voltage-mode controlled back converter. Analysis and simulations are presented to provide theoretical and practical evidence for the proposed control method. As the back converter has wide industrial application, it would be deemed necessary for designers to know about its bifurcation behaviour and how to control such behaviour.

scholarly journals Bifurcation Behaviour of the Buck Converter

2014 ◽  
Vol 75 (1) ◽  
Author(s):  
Dr Ng Kok Chiang ◽  
Dr Nadia Tan Mei Lin ◽  
Dr Michelle Tan Tien Tien
Keyword(s):  
Power Electronics ◽  
Power Converters ◽  
Input Voltage ◽  
Buck Converter ◽  
Bifurcation And Chaos ◽  
Constant Frequency ◽  
Non Linear ◽  
Linear Behaviour ◽  
Bifurcation Behaviour ◽  
Parameter Values

The bifurcation and chaos phenomena appeared in power system have become a focus subject at present. It has become apparent about a decade ago that power converters exhibit various types of non-linear behaviour which includes all kinds of bifurcations and chaos. Even basic DC/DC converters exhibit bifurcation and chaos phenomena as well as parallel-connected DC/DC converters and PFC system. The main source of such non-linearity is the switching mechanism of the converters. Non-linear components of the converter circuit and control scheme such as the use of naturally-sampled, constant-frequency PWM further contribute to the non-linear behaviour of converters such as a DC-to-DC buck converter. Thus, all feedback controlled power converters exhibit certain non-linear phenomena over a specific breadth of parameter values. Despite being commonly encountered by power electronics engineers, these non-linear phenomena are by and large not thoroughly understood by engineers. This paper examines the bifurcation behaviour of the buck converter in an ideal case when the input voltage is varied. The computer simulation scheme, PSPICE is employed to model the behaviour of the ideal buck converter. For certain values of the input voltage, Vin instability occurs. The analysis and conclusion presented in this paper will provide an overview of the bifurcation behaviour of the DC-to-DC buck converter, aspiring to draw attention of the power electronics and the circuits and systems communities to a field that is not often researched and examined.

Performance Analysis of Controller Design for DC-DC Buck Converter Using Linear and Non Linear Technique

2015 ◽  
Vol 719-720 ◽  
pp. 417-425 ◽  
Author(s):  
Husan Ali ◽  
Xian Cheng Zheng ◽  
Shahbaz Khan ◽  
Waseem Abbas ◽  
Dawar Awan
Keyword(s):  
Output Voltage ◽  
Control Method ◽  
Controller Design ◽  
Sliding Mode ◽  
Input Voltage ◽  
Buck Converter ◽  
Linear Control ◽  
Control Technique ◽  
Control Techniques ◽  
Non Linear

The switched mode dc-dc converters are some of the most widely used power electronics circuits because of high conversion efficiency and flexible output voltage. Many methods have been developed for the control of dc-dc converters. This paper deals with design of controller for dc-dc buck converter using various control techniques. The first two control techniques are based on classical or linear control methods i.e. PI and PID control, while the other two control technique are based on non linear control method i.e. Sliding Mode Control (SMC) and Sliding Mode Proportional Integral Derivative Control (SMC-PID). The output voltage and the inductor current of the applied control techniques are analyzed and compared in transient and steady state region. Also the robustness of the buck converter system is tested for load changes and input voltage variations. Matlab/Simulink is used for the simulations. The detailed simulation results are presented, which compare the performance of the designed controllers for various cases. The results show that the non linear control for DC/DC Buck converter proves to be more robust than linear control especially when dynamic tests are applied.

Linear Observer Based Linearizing Control of DC-DC Buck Converter

2021 ◽  
Vol 16 ◽  
pp. 52-60
Author(s):  
Ahmed Chouya ◽  
Kada Boureguig
Keyword(s):  
Input Voltage ◽  
Load Resistance ◽  
State Observer ◽  
Buck Converter ◽  
Linear Control ◽  
Model Reference ◽  
Non Linear ◽  
Linear Observer ◽  
Linear State

In this article; we process DC-DC buck converter by linearizing control (non linear control INPUTOUTPUT). As one observes at the same time the inductor current not measurable by a linear state observer proposed. This method can control the system by varying the output voltages, input voltage and load resistance. The proposed method has a stable response capable of reaching the model reference smoothly.

Switching Power Supply Control Strategy Based on Monitoring Configuration

2021 ◽  
Vol 16 (5) ◽  
pp. 766-772
Author(s):  
Le Luo ◽  
Ming-Zhong Yang
Keyword(s):  
Predictive Control ◽  
Output Voltage ◽  
Distribution Systems ◽  
Control Method ◽  
Sliding Mode ◽  
Input Voltage ◽  
Buck Converter ◽  
Switching Power Supply ◽  
Switching Power ◽  
Overshoot And Undershoot

In this paper, a new discrete-time sliding mode predictive control (DSMPC) strategy with a PID sliding function is proposed for synchronous DC-DC Buck converter. The model predictive control, along with digital sliding mode control (DSMC) is able to further reducing the chattering phenomenon, steady-state error, overshoot, and undershoot of the converter output voltage. The proposed control method implementation only requires output error voltage evaluation. The effectiveness of the proposed DSMPC is proved through simulation results executed by the MATLAB/SIMULINK software. These results demonstrate its performance is superior to DSMC. The selected synchronous Buck converter in this paper has 380 V input voltage and 48 V output voltage that can be applied in sections of DC distribution systems.

APPLYING RESONANT PARAMETRIC PERTURBATION TO CONTROL CHAOS IN THE BUCK DC/DC CONVERTER WITH PHASE SHIFT AND FREQUENCY MISMATCH CONSIDERATIONS

2003 ◽  
Vol 13 (11) ◽  
pp. 3459-3471 ◽  
Author(s):  
YUFEI ZHOU ◽  
CHI K. TSE ◽  
SHUI-SHENG QIU ◽  
FRANCIS C. M. LAU
Keyword(s):  
Phase Shift ◽  
Power Analysis ◽  
Control Method ◽  
Chaotic Behavior ◽  
Buck Converter ◽  
Effective Control ◽  
Parametric Perturbation ◽  
Control Power ◽  
Frequency Mismatch ◽  
Intermittent Chaos

The buck converter has been known to exhibit chaotic behavior in a wide parameter range. In this paper, the resonant parametric perturbation method is applied to control chaos in a voltage-mode controlled buck converter. In particular, the effects of phase shift and frequency mismatch in the perturbing signal are studied. It is shown that the control power can be significantly reduced if the perturbation is applied with an appropriate phase shift. Moreover, when frequency mismatch is inevitable, intermittent chaos occurs, but effective control can still be accomplished at the expense of raising the control power. Analysis, simulations and experimental measurements are presented to provide theoretical and practical evidences for the proposed control method.

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 System uncertainties estimation based adaptive robust backstepping control for DC DC buck converter

2021 ◽  
Vol 11 (1) ◽  
pp. 347
Author(s):  
Ali Hussien Mary ◽  
Abbas Hussien Miry ◽  
Mohammed Hussein Miry
Keyword(s):  
Sliding Mode Control ◽  
Control Method ◽  
Sliding Mode ◽  
External Disturbance ◽  
Input Voltage ◽  
Load Resistance ◽  
Backstepping Control ◽  
Buck Converter ◽  
Adaptive Estimator ◽  
Mode Control

This paper proposed a novel adaptive robust backstepping control scheme for DC-DC buck converter subjected to external disturbance and system uncertainty. Uncertainty in the load resistance and the input voltage represent the big challenge in buck converter control. In this work, an adaptive estimator for matched and mismatched uncertainties based backstepping control is applied for DC-DC buck converter. The updating laws are determined based on the lyapunov theorem. Thus, the difference between the estimated parameters and actual parameters converges to zero. The proposed control method is compared with the conventional sliding mode control and integral sliding mode control. Simulation results demonstrate the effectiveness and robustness of the proposed controller.

scholarly journals Stacked Buck Converter: Current Ripple Elimination Effect and Transient Response

Energies ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 64
Author(s):  
Chien-Chun Huang ◽  
Yu-Chen Liu ◽  
Chia-Ching Lin ◽  
Chih-Yu Ni ◽  
Huang-Jen Chiu
Keyword(s):  
Transient Response ◽  
Dead Time ◽  
Control Method ◽  
Buck Converter ◽  
Modulation Method ◽  
Output Current ◽  
Time Modulation ◽  
Advantages And Disadvantages ◽  
Improvement Method ◽  
Current Ripple

To balance the cost and volume when applying a low output current ripple, the power supply design should be able to eliminate the current ripple under any duty cycle in medium and high switching frequencies, and considerably reduce filter volume to improve power density. A stacked buck converter was eventually selected after reviewing the existing solutions and discussing their advantages and disadvantages. A stacked buck converter is used as a basis to propose the transient response and output current ripple elimination effect, boundary limit control method, and low output ripple dead time modulation method to make individual improvements. The principle, mathematical derivation, small-signal model, and compensator design method of the improvement method are presented in detail. Moreover, simulation results are used to mutually verify the correctness and effectiveness of the improvement method. A stacked buck converter with 330-V input, 50-V output, and 1-kW output power was implemented to verify the effect of the low output current ripple dead time modulation. Experimental results showed that the peak-to-peak value of the output current ripple was reduced from 2.09 A to 559 mA, and the RMS value was reduced from 551 mA to 91 mA, thereby effectively improving the output current ripple.

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