A Simple Sensorless Current Sharing Technique for Multiphase DC–DC Buck Converters

Gordillo, Josefa; Aguilar, C.

doi:10.1109/tpel.2016.2592240

Cited by 62 publications

(6 citation statements)

References 19 publications

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“…To reduce power consumption, modern data processing systems are required to lower the voltage level of the central processing unit (CPU) power supply. As a result, the power supply is able to deliver a large current while maintaining low voltage levels [1]- [3]. The modular approach to constructing DC-DC converters has been used for more than two decades to meet specific input/output needs, such as good transient response and reduced ripple.…”

Section: Introductionmentioning

confidence: 99%

Design and development of multiphase buck converters for voltage regulator modules

Varghese¹,

Manjunatha²,

Snehaprabha³

2022

IJECE

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<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>

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Section: Introductionmentioning

confidence: 99%

Design and development of multiphase buck converters for voltage regulator modules

Varghese¹,

Manjunatha²,

Snehaprabha³

2022

IJECE

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“…The proposed diagnosis methods use the DC bus voltage in Ribeiro et al, 4 and the sign of the DC bus derivative current in Ribeiro et al 5 The DC‐link current and the floating capacitor voltage are used for switch fault detection in multi‐level modular converters in Shao et al 6 and Sheng et al, 7 respectively. Other research works treat fault diagnosis with fewer sensors, and thus, reducing the cost of fault detection 8‐10 . Another diagnosis and optimization study of detecting OCF and SCF in a multi‐phase and multilevel converter is presented in Chen et al 11 Under fault conditions and a primary voltage of the isolation transformer, the OCF identification in Pei et al 12 and SCF in Pei et al 13 is obtained by adding a winding to the secondary.…”

Section: Introductionmentioning

confidence: 99%

New open circuit fault detection in a DC‐DC converter

Abouobaida

Abouelmahjoub

Oliveira-Assis

2021

Int Trans Electr Energ Syst

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Summary The fault detection in power converters is a meaningful aspect to ensure the system's power quality. In this context, the open circuit fault (OCF) in power switches is increasingly discussed. This paper proposes an OCF detection method that triggers the power switches based on the slope of the output predicted voltage. The proposed algorithm allows a sensorless detection of the OCF. The regulator synthesis uses the transfer function for a small signal model. The efficiency of the prediction method is validated by an estimation of the output voltage for several duty cycles offering a good accuracy, in which the error does not exceed 5%. The validity of the proposed method is demonstrated by MATLAB/Simulink tools and a comparative analysis is given at the end of this paper. Compared to other works in the literature, the major advantage of the proposed method is the simplicity of implementation, lower cost, and a better OCF detection time, which does not exceed 15% of the switching period in the test conditions.

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“…An obvious drawback of these current balancing methods is the large number of current sensors that is almost proportional to the number of interleaved units. To compact the converter and reduce its cost and complexity, several current estimation techniques have been developed for interleaved dc/dc converters, based on parasitic resistance estimation [14], small-signal duty cycle perturbation [15], self-tunable digital filter [16], temperature equalization [17] and many other. Similarly, several works have been dedicated to estimation algorithms to solve another common balancing problem for MMC structures, namely capacitor voltage balancing.…”

Section: Introductionmentioning

confidence: 99%

Interleaved Half-Bridge Submodules with Sensorless Leg Current Balancing in Modular Multilevel Converters

Viatkin¹,

Ricco²,

Mandrioli³

et al. 2021

Preprint

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A new state observer-based current balancing method for Modular Multilevel Converters with Interleaved half-bridge Sub-Modules (ISM-MMC) is presented in this paper. The developed observer allows estimating currents through interleaved half-bridge legs in each submodule of ISM-MMC basing only on arm current and submodule’s capacitor voltage measurements. Then, the interleaved current balancing control uses the estimated currents to reduce the interleaved currents imbalance caused by upstream control actions. This technique minimizes the number of required current sensors in ISM-MMC, thereby reducing the converter's cost, weight, and volume. Capabilities of the proposed interleaved currents sensorless balancing control has been tested against standard parameter tolerances of the composing passive elements. The feasibility of the proposed method is verified by extensive simulation and experimental tests.

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A Simple Sensorless Current Sharing Technique for Multiphase DC–DC Buck Converters

Cited by 62 publications

References 19 publications

Design and development of multiphase buck converters for voltage regulator modules

Design and development of multiphase buck converters for voltage regulator modules

New open circuit fault detection in a DC‐DC converter

Interleaved Half-Bridge Submodules with Sensorless Leg Current Balancing in Modular Multilevel Converters

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