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Electric-drive vehicles, including hybrid (HEV), plug-in hybrid (PHEV) and electric vehicles (EV), require a high-voltage (HV) battery pack for propulsion, and a low-voltage (LV) dc bus for auxiliary loads. This paper presents an architecture that uses modular dc-dc bypass converters to perform active battery cell balancing and to supply current to auxiliary loads, eliminating the need for a separate...
This paper presents the design and HSPICE simulation results of an on-chip integrated Single-OutputSensor Maximum Power Point Tracking (SOS MPPT) PV solar system architecture. The cell-level on-chip integrated analog SOS MPPT circuit is designed to track the maximum power point of PV system under different conditions including changes in irradiation levels. The MPPT circuit is implemented using 0...
The energy efficiency of typical data centers is less than 50% because more than half of the power is consumed during power conversion, distribution, cooling, etc. In this paper, a combination of two approaches to improve power supply efficiency is implemented and experimentally verified. One approach uses a high voltage DC architecture, designed to reduce distribution loss and remove unnecessary...
With computers and servers becoming increasingly widespread, a growing amount of public attention has been focused on improving the efficiency of the server power supply. In this paper, the high-voltage bus converter in the present architecture of the server power supplies is replaced by the multiple output converter to improve the efficiency as there are a variety of loads. Aimed at improving the...
This paper introduces a new battery management system for portable electronics applications based on the flyback converter. This new architecture integrates the voltage step-up and balancing functions inside a single converter. The step-up function is obtained using an assisting concept, where the flyback output is placed at the top of the battery pack and is therefore only processing a portion of...
This paper presents the design of an on-chip integrated power management architecture with Maximum Power Point Tracking (MPPT) for Photovoltaic (PV) solar system. The system is developed in order to extract higher power for PV system under partial shading and other mismatching conditions. The MPPT circuit is implemented in 0.35μm Complementary Metal-Oxide-Semiconductor (CMOS) technology. The on-chip...
Presented herein is Uniform Input Voltage Distribution (UIVD) control [6–9] for Distributed-Input Series-Output (DISO) converter power systems. UIVD for DISO converters is implemented to primarily achieve grouped maximum power throughput from non-identical power sources. This paper also offers a revised Maximum Power Tracking (MPT) controller [11] that facilitates simultaneous processing of distributed...
This paper proposes a new distributed battery energy architecture based on the micro-bank modules for DC microgrids. The benefits of the proposed architecture include 1) no voltage sharing problem and no overcharge/overdischarge problem; 2) high compatibility and reliability 3) high energy utilization efficiency; 4) reduced volume and weight of the BMS. Taking advantage of the battery recovery effect,...
This paper presents a new strategy, diffusion charge redistribution (DCR), for balancing power among photovoltaic cells to increase energy extraction and to improve maximum power point tracking (MPPT) efficiency under partial shading conditions. With DCR, testing and binning during cell manufacturing can be eliminated, and significant cost savings can be achieved during production. The proposed technique...
This paper presents a distributed battery energy storage architecture where the cells in the battery pack are decoupled from each other by connecting each cell with a lower power (smaller) DC-DC power converter. In addition to providing voltage regulation for the DC bus, these small DC-DC power converters are utilized to achieve state of charge (SOC) balancing among the cells by employing a proposed...
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