High-Frequency High-Efficiency GaN-Based Interleaved CRM Bidirectional Buck/Boost Converter with Inverse Coupled Inductor

Huang, Xiucheng; Lee, Fred C.; Li, Qiang; Wei, Du

doi:10.1109/tpel.2015.2476482

Cited by 157 publications

(87 citation statements)

References 16 publications

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“…A hard switched BDC-based SPV-fed LED lighting system is reported, 7 which results in increased switching losses. Critical conduction mode (CRM) [29][30][31][32][33][34] is a control technique used to achieve soft switching across the switches by maintaining the current in the inductor operate at the boundary condition, ie, between continuous conduction mode (CCM) and discontinuous conduction mode (DCM), with frequency variation. 8,9 But due to lack of soft switching feature, these converters have low efficiency.…”

Section: Introductionmentioning

confidence: 99%

Analysis and implementation of soft‐switched bidirectional buck‐boost DC‐DC converter for solar PV‐fed LED street lighting systems

Veeramallu

Porpandiselvi

Narasimharaju

2019

Circuit Theory & Apps

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This paper presents a single-stage solar photovoltaic (SPV) fed light-emitting diode (LED) street lighting system (LED-SLS) using a novel soft-switched buck-boost bidirectional DC-DC converter (BDC). A coupled inductor (CI) based auxiliary circuit is used in the proposed BDC to achieve soft switching, which leads to improved efficiency with reduced ripple. As SPV power is available during day time alone, a battery storage system (BSS) is used. The BSS is charged from SPV during day time through the proposed CI-BDC. The BSS powers the LED-SLS during night time through the same CI-BDC. The proposed CI-BDC provides various advantages like buck/boost operation in either direction of power flow, zero voltage switching (ZVS) soft-switching, use of single magnetic core, high efficiency, reduced ripple in output current, and simple control. Also, it provides an illumination control of the LED-SLS using pulse-width modulation (PWM) dimming. To maintain high efficiency even at light loads, the proposed CI-BDC works as conventional BDC by turning OFF the auxiliary circuit. Thus, avoiding the high conduction losses in it at light loads. The detailed working principle and design analysis are presented along with simulation results. A prototype of 40 W LED lighting system has been developed, and experimental validation is presented. KEYWORDSbidirectional, buck-boost, coupled inductor, LED driver, soft switching 1990

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Section: Introductionmentioning

confidence: 99%

Analysis and implementation of soft‐switched bidirectional buck‐boost DC‐DC converter for solar PV‐fed LED street lighting systems

Veeramallu

Porpandiselvi

Narasimharaju

2019

Circuit Theory & Apps

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“…The flyback converter has been widely used in a large number of power conversions due to its relatively simple structure, good performance, and galvanic isolation [26][27][28]. A bidirectional buck/boost converter is a mature topology in power electronics systems due to its simplicity and high efficiency [29]; however, the conventional buck/boost converter cannot Compared to traditional converters, with the addition of the realization of conventional bi-directional function, the multifunctional converter can also be applied for both the isolated and non-isolated operation modes.…”

Section: Proposed Multifunctional Isolated and Non-isolated Dual Modementioning

confidence: 99%

“…As conventional bidirectional isolated or non-isolated converter control methods and strategies have been widely presented in the literature, details on the related control analyses and design are provided in [26][27][28][29][30][31][32][33][34][35][36][37][38]. Given that the proposed new converter has many different transition control strategies across different states and modes, the switching control is mainly used during the transition process between the switching devices depending on the application requirements.…”

Section: Control Strategymentioning

confidence: 99%

A Multifunctional Isolated and Non-Isolated Dual Mode Converter for Renewable Energy Conversion Applications

Wang

Gan

et al. 2017

Energies

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Abstract:In this paper, a multifunctional isolated and non-isolated dual-mode low-power converter was designed for renewable energy conversion applications such as photovoltaic power generation to achieve different operating modes under bi-directional electrical conversion. The proposed topology consists of a bidirectional non-isolated DC/DC circuit and an isolated converter with a high-frequency transformer, which merge the advantages of both the conventional isolated converter and non-isolated converter with the combination of the two converter technologies. Compared with traditional converters, the multifunctional converter can not only realize conventional bi-directional functions, but can also be applied for many different operation modes and meet the high output/input ratio demands with the two converter circuits operating together. A novel control algorithm was proposed to achieve the various functions of the proposed converter. An experimental platform based on the proposed circuit was established. Both the simulation and experimental results indicated that the proposed converter could provide isolated and non-isolated modes in different applications, which could meet different practical engineering requirements.

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“…For that reason, perspective topological modification has been made. Most of the proposals are focused on the optimization of the voltage gain ratio in the pursuit of duty cycle improvement [1][2][3][4][5]. Many single-stage high voltage gain converters have been developed [6][7][8][9][10] with Figure 1 shows the dual interleaved DC-DC boost converter with magnetically coupled inductors.…”

Section: Introductionmentioning

confidence: 99%

High Gain Boost Interleaved Converters with Coupled Inductors and with Demagnetizing Circuits

et al. 2018

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This paper proposes double interleaved boost converters with high voltage gain and with magnetically coupled inductors, while a third coupled winding is used for magnetic flux reset of the core during converter operation. The topology of the proposal is simple, it does not require many additional components compared to standard interleaved topologies, and it improves the transfer characteristics, as well as system efficiency even for high power levels. The investigation of steady-state operation was undertaken. It was discovered that the proposed converter can be designed for a target application where very high voltage gain is required, while adjustment of voltage gain value can be done through duty-cycle variation or by the turns-ratio modification between individual coils. The 1 kW prototype was designed to test the theoretical analysis. The results demonstrate that the proposed converter achieves very high voltage gain (1:8), while for the designed prototype the peak efficiency reaches >96% even when two additional diodes and one winding were implemented within the converter's main circuit. The dependency of the output voltage stiffness on load change is minimal. Thus, the presented converter might be a proper solution for applications where tight constant DC-bus voltage is required (a DC-DC converter for inverters).

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High-Frequency High-Efficiency GaN-Based Interleaved CRM Bidirectional Buck/Boost Converter with Inverse Coupled Inductor

Cited by 157 publications

References 16 publications

Analysis and implementation of soft‐switched bidirectional buck‐boost DC‐DC converter for solar PV‐fed LED street lighting systems

Analysis and implementation of soft‐switched bidirectional buck‐boost DC‐DC converter for solar PV‐fed LED street lighting systems

A Multifunctional Isolated and Non-Isolated Dual Mode Converter for Renewable Energy Conversion Applications

High Gain Boost Interleaved Converters with Coupled Inductors and with Demagnetizing Circuits

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