Power Loss Analyses for Dynamic Phase Number Control in Multiphase Voltage Regulators

Qiu, Weihong; Cheung, Chun; Xiao, Shangyang; Miller, Greg

doi:10.1109/apec.2009.4802640

Cited by 22 publications

(5 citation statements)

References 6 publications

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“…On the basis of the power conversion efficiency curves shown in Fig. 1, it is proposed to use the auto‐phase control method to control the multi‐phase PWM power regulator [18–21]. The number of phases for the multi‐phase PWM power regulator changes depends on the output current.…”

Section: Multi‐phase Auto‐control Methodsmentioning

confidence: 99%

Improvement of the power conversion efficiency of a personal computer

Huang

Bai

Kuan

2016

IET Power Electronics

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Most low-power PC design research focuses on the power consumption of devices in the system, in order to reduce the consumption of the peripheral components while the system is in the idle state. In this design, the power conversion efficiency of the multi-phase pulse width modulation power regulator can be improved by using the auto-phase switching control scheme. The external load-sensing circuit is used to both monitor the output current and to change the regulator to a different operation method automatically. This design is dependent on the different loading to set the optimised operation phase. The power conversion efficiency can be maintained from 88.19 to 93.41%, when the load current is changed from 1.06 to 119 A.

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Section: Multi‐phase Auto‐control Methodsmentioning

confidence: 99%

Improvement of the power conversion efficiency of a personal computer

Huang

Bai

Kuan

2016

IET Power Electronics

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“…Even without APC control, this architecture is commonly used in PV and ESS applications [15]- [17]. By adapting the number of phase, the APC control theoretically implies a reduction of components losses, and thus an increase of the converter efficiency [18], [19]. In [20], a look-up table depending on input and output voltages of the converter is proposed to implemented the APC control.…”

Section: A Interleaved Mode and Apc Controlmentioning

confidence: 99%

Impact on Energy Saving of Active Phase Count Control to a DC/DC Converter in a DC Micro Grid

Gaetani-Liseo¹,

Alonso²,

Séguier³

et al. 2018

2018 7th International Conference on Renewable Energy Research and Applications (ICRERA)

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This paper proposes to analyze the impact of active phase count control in DC/DC multi-phase bi-directional interleaved converter dedicated to energy storage system in low voltage DC micro grid for building integrated photovoltaic application. We focus our interest on the energy saved with an adaptive phase count control for real working conditions. To validate our approach a long term analysis was done based on a several years database of photovoltaic production and consumption power profile recorded in our laboratory building. To estimate the impact of our adaptive phase count control we built a model of converter efficiency for a large scale of operating points. Its parameters were identified through experimental measurements made on a bi-phase DC/DC bidirectional converter developed in LAAS-CNRS. Pertinence of APC control is estimated for 5 years simulation process and different load profiles. Results obtained in case of lightning network load profile, show that the energy lost without adaptive phase count control correspond to 4.22% of the energy exchange, against 3.72% with adaptive phase count control. This result correspond to a decrease of looses of 12%. In order to study the impacts on a long term analyze we choose to discuss these results regarding the energy saved with adaptive phase count control. To complete our work we propose a comparative analysis with two different load profiles with details by month and days.

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“…Therefore, the contents of the threshold current lookup table need to adapt to changes in these two quantities. Techniques described previously in [2], [4]- [6] use the relation in Eqn. 5.…”

Section: Analysis Of Power Lossmentioning

confidence: 99%

“…In this work, the analysis for power loss of an -phase converter in [2] is extended to enable automatic adaptation of the threshold current lookup table. Based on this analysis, an algorithm is proposed to operate the converter optimally across input voltage and switching frequency changes.…”

Section: Introductionmentioning

confidence: 99%

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Optimal dynamic phase add/drop mechanism in multiphase DC-DC buck converters

Tadeparthy

Aniruddhan

et al. 2016

2016 IEEE Applied Power Electronics Conference and Exposition (APEC)

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In multiphase buck converters, phases are dynamically added or dropped based on the output load, to improve efficiency. This is typically achieved by programming a lookup table containing the range of threshold currents for each phase, independent of input voltage and switching frequency. In this work, an algorithm is proposed to recalibrate the threshold currents for operation at optimum number of phases across changes in input voltage and switching frequency. To evaluate the algorithm, a 6-phase synchronous buck converter is tested in forced CCM (Continuous Conduction Mode) over several input voltages and switching frequencies. A maximum efficiency improvement of 1.6 % is demonstrated with the proposed algorithm, when compared with the conventional scheme.978-1-4673-9550-2/16/$31.00 ©2016 IEEE

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Power Loss Analyses for Dynamic Phase Number Control in Multiphase Voltage Regulators

Cited by 22 publications

References 6 publications

Improvement of the power conversion efficiency of a personal computer

Improvement of the power conversion efficiency of a personal computer

Impact on Energy Saving of Active Phase Count Control to a DC/DC Converter in a DC Micro Grid

Optimal dynamic phase add/drop mechanism in multiphase DC-DC buck converters

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