Design and analysis of synchronous Buck converter for UPS application

Sreedhar, Jadapalli; Basavaraju, B.

doi:10.1109/aeeicb.2016.7538356

Cited by 13 publications

(6 citation statements)

References 5 publications

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“…DC-DC buck converters are used for charging batteries and boost converters are used at out terminals to obtain 48 V. The battery is charged using the CC-CV charging method, which is controlled primarily by a dual loop PI controller. 23,24 The flowchart representing the CC-CV process is shown in Figure 6. The building block to implement CC-CV code in S-function using Matlab/ Simulink with embedded C/C++ program to assist the required processes is shown in Figure 7.…”

Section: Bms Operationmentioning

confidence: 99%

A novel battery management scheme for critical loads

Bandatmakuru,

Sandepudi

2024

Energy Storage

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This article proposes a novel battery management system (BMS) to ensure uninterruptible power delivery to a 48 V DC bus used for electric vehicle charging stations, data centers, telecommunication systems, and critical care units such as hospitals. The proposed BMS facilitates constant current and constant voltage charging to maintain optimal battery performance during normal operation. This BMS is designed for effective control, monitoring and protection of two lead‐acid battery units to form battery energy storage system (BESS). Furthermore, it is capable of isolating batteries in abnormal conditions and operates them independently to provide reliable supply at output terminals with full capacity. The system utilizes a 30 V DC source derived from AC mains or solar photovoltaic system. This supply is used to charge the BESS and also supply to the load. In the event of failure of 30 V supply, it seamlessly transits to BESS mode to supply power to boost converter to maintain constant 48 V DC output at load terminal. The proposed system architecture not only enhances power reliability but also improves overall system efficiency, making it well‐suited for critical applications require continuous and stable power supply. Simulation studies using Matlab/Simulink and analytical results using TINA (Tool kit for Interactive Network Analysis) are presented to show that 48 V DC supply is maintained at output terminals during failure of input 30 V DC source or failure of one battery unit.

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Section: Bms Operationmentioning

confidence: 99%

A novel battery management scheme for critical loads

Bandatmakuru,

Sandepudi

2024

Energy Storage

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“…In this context, this paper presents a comparison between three different architectures for the power supply of a LiDAR, by reorganizing the same DC-DC converters in the three different architectures: (i) an architecture with all of them in parallel; (ii) an architecture with the three DC-DC converters linked in cascade; and (iii) a hybrid architecture, with two DC-DC converters connected in parallel to the output of the third one. The topology adopted in the scope of this paper is the synchronous buck Switched-Mode Power Supply (SMPS), which is a modified version of the conventional buck converter SMPS, in which the diode is replaced by a second power switch (MOSFET), minimizing the diode conduction losses and thus improving the conversion efficiency [16]. The LiDAR systems requires a total power of 50 W for the three different voltages values according to its function and divided as: 17 W at 3.3 V, 5 W at 5 V, and 28 W at 12 V. In terms of the value of the input voltage for the converters, the maximum voltage to be considered is 65 V, which is a requisite of the LiDAR system.…”

Section: Introductionmentioning

confidence: 99%

Efficiency Comparison of Different DC-DC Converter Architectures for a Power Supply of a LiDAR System

Figueiredo

Monteiro

Afonso

et al. 2021

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

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LiDAR (Light Detection And Ranging) is a technology used to measure distances to objects. Internally, a LiDAR system is constituted by several components, including a power supply, which is responsible to provide the distinct voltage levels necessary for all the components. In this context, this paper presents an efficiency comparison of three different DC-DC converter architectures for a LiDAR system, each one composed of three DC-DC converters: in parallel; in cascade; and hybrid (mix of parallel and cascade). The topology of the adopted integrated DC-DC converters is the synchronous buck Switched-Mode Power Supply (SMPS), which is a modified version of the basic buck SMPS topology. Three distinct SMPSs were considered: LM5146-Q1, LM5116, and TPS548A20RVER. These SMPSs were selected according to the requirements of voltage levels, namely, 12 V, 5 V, and 3.3 V. Along the paper, the principle of operation of the SMPSs is presented, as well as the evaluation results obtained for different operating powers, allowing to establish a comprehensive efficiency comparison.

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“…In another study [6], a SBC was compared to the classical buck converter and the isolated buck converter. The SBC is recommended for UPS application [7]. It was determined that conduction losses decreased and efficiency increased by at least 5% thanks to the MOSFET element used instead of diode in the SBC.…”

Section: Introductionmentioning

confidence: 99%

Submodule based MPPT with synchronous buck converter under dynamic partial shading conditions

Başoğlu¹

2021

European Journal of Technic

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In order to obtain more power from photovoltaic (PV) modules under mismatching operating conditions, the submodule-based MPPT technique is an important solution. In this technique, since the power-voltage (P-V) curve of a submodule cannot be multi-peaked, the maximum power point (MPP) tracking (MPPT) is easily achieved through a DC-DC converter connected to each submodule. Since the P-V curve cannot be in a multi-peaked form, the maximum power can be obtained with a simple MPPT algorithm. For this reason, perturb & observe (P&O) algorithm can be chosen. In this study, the behaviour of a submodule-based MPPT with synchronous buck converter (SBC) is investigated for dynamic shading conditions. In addition, submodule-based MPPT and module-based MPPT technique were compared and the comparison was confirmed by simulation studies that submodule-based MPPT performed better. In this context, simulation studies were carried out for different shading conditions. According to the simulation results, the submodulebased MPPT approach achieves greater efficiencies to the module-based MPPT. In some simulations, when the module-based MPPT technique is used, the operation at the local MPP has been realized. In such cases, more advanced algorithms are needed. However, a simple algorithm is sufficient in submodule-based MPPT. The only disadvantage of this MPPT is the high hardware cost. However, the increase in efficiency obtained is at a level that can easily tolerate this cost.

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Design and analysis of synchronous Buck converter for UPS application

Cited by 13 publications

References 5 publications

A novel battery management scheme for critical loads

A novel battery management scheme for critical loads

Efficiency Comparison of Different DC-DC Converter Architectures for a Power Supply of a LiDAR System

Submodule based MPPT with synchronous buck converter under dynamic partial shading conditions

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