Power Stage Design of a Synchronous Buck Converter for Battery Charger Application

Hossain, Md. Kamal; Islam, Md. Rashedul

doi:10.1109/icaeee.2018.8642962

Cited by 6 publications

(7 citation statements)

References 10 publications

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“…Several operating principles are used to analyze the behavior of synchronous buck converters, including the duty cycle, the switching frequency, and the input and output voltages [20], [21]. The duty cycle is defined as the ratio of the on-time of the high-side switch to the switching period, and determines the output voltage.…”

Section: Int J Elec and Comp Engmentioning

confidence: 99%

Fuzzy control of synchronous buck converters utilizing fuzzy inference system for renewable energy applications

Martinez

Ariza

Sarmiento

2023

IJECE

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<p>In the present research, an innovative fuzzy control approach is developed specifically for synchronous buck converters utilized in renewable energy applications. The proposed control strategy effectively manages load changes, nonlinear loads, and input voltage variations while improving both stability and transient response. The method employs a fuzzy inference system (FIS) that integrates adaptive control, feedforward control, and multivariable control to guarantee optimal performance under a wide range of operating conditions. The design of the control scheme involves formulating a rule base connecting input variables to an output variable, which signifies the duty cycle of the switching signal. The rule base is configured to dynamically modify control rules and membership functions in accordance with load conditions, input voltage fluctuations, and other contributing factors. The performance of the control scheme is evaluated in comparison to conventional techniques, such as proportional integral derivative (PID) control. Results indicate that the advanced fuzzy control approach surpasses traditional methods in terms of voltage regulation, stability, and transient response, particularly when faced with variable load conditions and input voltage changes. As a result, this control scheme is highly compatible with renewable energy systems, encompassing solar and wind power installations where input voltage and load conditions may experience considerable fluctuations. This research highlights the potential of the proposed fuzzy control approach to significantly enhance the performance and reliability of renewable energy systems.</p>

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Section: Int J Elec and Comp Engmentioning

confidence: 99%

Fuzzy control of synchronous buck converters utilizing fuzzy inference system for renewable energy applications

Martinez

Ariza

Sarmiento

2023

IJECE

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“…where R i is the "ON" state resistance, a ri is the charge multiplier factor for the i number of switches, and D i is the duty ratio. For the 50% duty ratio of each switches, Equation (11) becomes…”

Section: Equivalent Output Impedancementioning

confidence: 99%

“…Similarly, the cascaded structure is not desirable for drastically decreasing the conversion efficiency. Synchronous type DC–DC buck converter reduces the power loss in the conversion stage and provides a constant DC voltage for charging the battery 11 . The off‐chip inductor is unsuitable for its larger dimension and strong nonlinear characteristics in micro‐power applications such as small volume mobile devices, sensor networks, and medical devices.…”

Section: Introductionmentioning

confidence: 99%

“…Synchronous type DC-DC buck converter reduces the power loss in the conversion stage and provides a constant DC voltage for charging the battery. 11 The offchip inductor is unsuitable for its larger dimension and strong nonlinear characteristics in micro-power applications such as small volume mobile devices, sensor networks, and medical devices. A modified power supply switching circuit is reported to remove the limitations of conventional low dropout linear voltage regulator; however, the modified converter comprises many passive elements that are unsuitable for low-cost portable applications.…”

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confidence: 99%

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An efficient DC‐DC converter for inductive power transfer in low‐power sensor applications

Hossain

Alexander

et al. 2022

Circuit Theory & Apps

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Summary Inductive power transfer has become an emerging technology for its significant benefits in many applications, including mobile phones, laptops, electric vehicles, implanted bio‐sensors, and internet of things (IoT) devices. In modern applications, a direct current–direct current (DC–DC) converter is one of the essential components to regulate the output supply voltage for achieving the desired characteristics, that is, steady voltage with lower peak ripples. This paper presents a switched‐capacitor (SC) DC–DC converter using complementary architecture to provide a regulated DC voltage with an increased dynamic response. The proposed topology enhances the converter efficiency by decreasing the equivalent output resistance to half by connecting two symmetric SC single ladder converters. The proposed converter is designed using the standard 130‐nm BiCMOS process. The results show that the proposed architecture produces 327‐mV DC output with a rise time of 60.1 ns and consumes 3.449‐nW power for 1.0‐V DC supply. The output settling time is 43.6% lower than the single‐stage SC DC–DC converter with an input frequency of 200 MHz. The comparison results show that the proposed converter has a higher power conversion efficiency of 93.87% and a lower power density of 0.57 mW/mm2 compared to the existing works.

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“…It is concluded that INC generally handles current stability very well, followed by HC, CV, PID and lastly P&O. The current is often impacted by switching losses which reduce battery charging efficiency, hence Hossain and Islam (2018) suggested to install some protection devices to reduce the impact, besides using MPPT [10]. Another way is to use peak current detector to maintain the stability of the inductor current which is mentioned by Dokania and others (2004) [11].…”

Section: Performance Analysis Of Various Battery Charger Circuitsmentioning

confidence: 99%

The Study of MPPT Algorithm for Solar Battery Charging System

Yang¹,

Yahaya²,

Ponniran³

2022

Malaysian J. Sci. Adv. Tech.

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Renewable energy is a topic that is frequently researched recently due to the negative environmental changes brought by using non-renewable energy sources such as fossil fuels. The application of the renewable energy is wide including being used to charge a battery using buck converter in general charging system. However, the problems faced by these solar charging systems is the inability to regulate and stabilize the output of the PV module, causing the loss of efficiency of PV module. A mechanism that is used to solve the problem is to develop the algorithm for maximum power point tracking in PV module. Thus, the project aims to improve the performance of battery charging system by using different MPPT algorithms and compared their performance with issues being analyzed, and helped to suggest the best algorithm to maximize the power supply and consumption effectively based on the MATLAB/Simulink results. The MPPT techniques used in the study consist of Constant Voltage (CV), Perturb and Observe (P&O), Incremental Conductance (INC) and also Hill Climbing (HC). The algorithms will be used on buck converter and compared with conventional solar battery chargers that uses PID controller for voltage regulation. The results are obtained from measurements of various parameters and they will be compared with the theoretical value with error calculation to determine the efficiency of the mechanism and also analyzed to determine the causes and effects of the simulation and for comparison. The results show that different algorithms can affect the performance of the system, such as changing transient times, power efficiency, shape of graph and so on. In conclusion, the best algorithm is Incremental Conductance due to its high-power efficiency and stable parameter output for battery charging system, in which further work done can be continued to include more weather data and constructing complex algorithm as well.

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Power Stage Design of a Synchronous Buck Converter for Battery Charger Application

Cited by 6 publications

References 10 publications

Fuzzy control of synchronous buck converters utilizing fuzzy inference system for renewable energy applications

Fuzzy control of synchronous buck converters utilizing fuzzy inference system for renewable energy applications

An efficient DC‐DC converter for inductive power transfer in low‐power sensor applications

The Study of MPPT Algorithm for Solar Battery Charging System

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