An Improved Control scheme for Multiphase Buck Converter Circuits used in Voltage Regulator Modules

2006 ◽  
Author(s):  
J. Agrawal ◽  
D. Kastha ◽  
A. Patra ◽  
B. Culpepper
Keyword(s):  
Buck Converter ◽  
Voltage Regulator ◽  
Voltage Regulator Modules ◽  
Control Scheme

scholarly journals Design and development of multiphase buck converters for voltage regulator modules

2022 ◽  
Vol 12 (1) ◽  
pp. 239
Author(s):  
Mini Puthenpurakkal Varghese ◽  
Ashwathnarayana Manjunatha ◽  
Thazhathu Veedu Snehaprabha
Keyword(s):  
Closed Loop ◽  
Input Voltage ◽  
Voltage Regulator ◽  
Buck Converters ◽  
Loop Control ◽  
Switching Converter ◽  
Voltage Regulator Modules ◽  
Load Demand ◽  
Computing Complexity ◽  
Control Scheme

<p>Modern microprocessors in high-power applications require a low input voltage and a high input current, necessitating the use of multiphase buck converters. As per microprocessor computing complexity, the power requirements of the switching converter will also be more important and will be increasing as per load demand. Previous studies introduced some methods to achieve the advantages associated with multiphase regulators. This paper presents an effective closed closed-loop control scheme for multiphase buck converters that reduces ripple and improves transient response. It is suitable for applications that require regulated output voltage with effectively reduced ripple. The analysis began with a simulation of the entire design using the OrCAD tool, followed by the construction of a hardware setup. Experiments on a 200 Khz, 9 V, 12 A, 2-phase buck voltage regulator were conducted and the proposed experiment found to be useful.</p>

scholarly journals The study on the effect of voltage ripple on multiphase buck converters with phase shedding control scheme for SCADA applications

2021 ◽  
Vol 10 (4) ◽  
pp. 1856-1863
Author(s):  
Mini P. Varghese ◽  
A. Manjunatha ◽  
T. V. Snehaprabha
Keyword(s):  
Output Voltage ◽  
Low Voltage ◽  
Input Voltage ◽  
Buck Converter ◽  
Switching Frequency ◽  
Power Sources ◽  
Voltage Regulator Modules ◽  
Voltage Ripple ◽  
Control Scheme ◽  
Enhance Efficiency

Voltage regulator modules (VRM) need to have low output voltage ripple and tight efficiency to power advanced microprocessors. This paper explains a phase shedding technique to enhance efficiency and its impact on output voltage ripple. In this study, analysis was done on a 4-phase buck converter which is having an input voltage of 45-65 V and delivers an output of 9 V, 12A with a switching frequency of 200Khz. The phase shedding control scheme is suitable for applications such as power sources for programmable logic controllers, which is a part of SCADA systems, which requires a low voltage and high current power supply. Working of a multiphase buck converter with phase shedding is modelled and verified using Matlab/Simulink software. The simulation results show the effect of the phase shedding technique on efficiency in varying load conditions and the effect of an increase of the voltage ripple at the output.

Logic-Based Switching Adaptive Control of DC-DC Buck Converter

2012 ◽  
Vol 229-231 ◽  
pp. 2209-2212
Author(s):  
Bao Bin Liu ◽  
Wei Zhou
Keyword(s):  
Adaptive Control ◽  
Closed Loop ◽  
Buck Converter ◽  
Uncertain Parameters ◽  
Small Signal ◽  
Closed Loop System ◽  
Unknown Parameters ◽  
Signal Model ◽  
Small Signal Model ◽  
Control Scheme

Logic-based switching adaptive control scheme is proposed for the model of DC-DC buck converter in presence of uncertain parameters and power supply disturbance. All uncertain parameters and the disturbance are estimated together through constructing Lyapunov function. And a switching mechanism is used to ensure global asymptotic stability of the closed-loop system. The results of simulation show that even if there are multiple unknown parameters in the small-signal model, the control system of DC-DC buck converter can estimate unknown parameters quickly and accurately.

Adaptive Control for Buck Power Converter Using Fixed Point Inducting Control and Zero Average Dynamics Strategies

2015 ◽  
Vol 25 (04) ◽  
pp. 1550049 ◽  
Author(s):  
Fredy Edimer Hoyos Velasco ◽  
Nicolás Toro García ◽  
Yeison Alberto Garcés Gómez
Keyword(s):  
Fixed Point ◽  
Digital Signal ◽  
Power Converter ◽  
Buck Converter ◽  
Control Techniques ◽  
Comparison Results ◽  
Control Scheme ◽  
Rapid Control ◽  
Rapid Control Prototyping ◽  
Lms Method

In this paper, the output voltage of a buck power converter is controlled by means of a quasi-sliding scheme. The Fixed Point Inducting Control (FPIC) technique is used for the control design, based on the Zero Average Dynamics (ZAD) strategy, including load estimation by means of the Least Mean Squares (LMS) method. The control scheme is tested in a Rapid Control Prototyping (RCP) system based on Digital Signal Processing (DSP) for dSPACE platform. The closed loop system shows adequate performance. The experimental and simulation results match. The main contribution of this paper is to introduce the load estimator by means of LMS, to make ZAD and FPIC control feasible in load variation conditions. In addition, comparison results for controlled buck converter with SMC, PID and ZAD–FPIC control techniques are shown.

A PAIM control scheme on hybrid system with its application on SIDO buck converter

2020 ◽  
Vol 540 ◽  
pp. 123118
Author(s):  
Duyu Liu ◽  
Xinzhi Liu ◽  
Hao Chen ◽  
Shouming Zhong
Keyword(s):  
Hybrid System ◽  
Buck Converter ◽  
Control Scheme
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