Coupled inductor based zero-voltage-switching buck/boost converter

Wang, Shanshan; Hu, Yihua; Gao, Ming; Shi, Jianjiang; Liu, Tao

doi:10.1007/s43236-022-00418-w

Cited by 3 publications

(9 citation statements)

References 31 publications

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“…Many scientific papers have studied power converters, 1–22 which include different circuit topologies, soft switching control methods, and transformer optimization methods. However, the output powers of power converters in these scientific papers were not large, and there have been no in-depth studies on the input voltage range.…”

Section: Contributions Of Previous Workmentioning

confidence: 99%

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Simulation optimal and design of 3-kW DC-DC converter for pure electric vehicles

Sun,

Zhou,

Chiu

et al. 2023

Advances in Mechanical Engineering

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There are significant differences between pure electric vehicles and traditional fuel vehicles. High-power converters are required to meet the increased energy consumption requirements of loads within pure electric vehicles. A high-power integrated DC-DC converter is designed to meet the requirements of pure electric vehicles. First, the characteristics of LLC resonant converters are analyzed, and a fuzzy adaptive PID frequency conversion phase-shift soft switching control strategy is proposed. Second, the fuzzy controller is designed based on the MATLAB toolbox based on the characteristics of electric vehicle converters. Then, in order to further improve the efficiency of the converter, a planar transformer is proposed and optimized. It is found that with the increase in the switching frequency, the loss is smaller, which is more conducive to improving the efficiency. Simulation results show that zero-voltage switching and zero-current switching can be realized by using the proposed control strategy, and experimental results show that the proposed strategy is significantly more efficient under non-heavy-load conditions. The minimum and maximum efficiency values are 92% and 97.38%, respectively. The high-power converter ensures the normal operation of the load of pure electric vehicles. This work provides a method for developing high-power DC-DC converters and improving efficiency.

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Section: Contributions Of Previous Workmentioning

confidence: 99%

“…Thus, this converter could be widely used in sensors and low-power portable devices. Wang et al 4 proposed a ZVS Buck/Boost converter to achieve converter efficiency. The simulation results showed that the loss was small.…”

Section: Introductionmentioning

confidence: 99%

Simulation optimal and design of 3-kW DC-DC converter for pure electric vehicles

Sun,

Zhou,

Chiu

et al. 2023

Advances in Mechanical Engineering

View full text Add to dashboard Cite

show abstract

“…One of the best options is parallel interleaved structures for addressing the aforementioned issues [5] due to their advantageous characteristics, including sharing the electrical current and ripple cancellation. By using a MOSFET switch in place of the diode in a buck or boost converter, a typical, non‐isolated bidirectional converter may be built [6]. However, the efficiency is poor, the voltage or current range is large, and the duty cycle is high in large voltage gain applications.…”

Section: Introductionmentioning

confidence: 99%

A bidirectional high voltage ratio DC–DC topology for energy storage systems in microgrid

Banaei,

Golmohamadi,

Afsharirad

2023

IET Power Electronics

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This study proposes a bidirectional DC–DC converter with low voltage stress on its semiconductor elements and high voltage gain. Bidirectional DC–DC converters play a crucial role in DC microgrid systems, and they have been used for many applications such as power flow management, battery storage systems, voltage regulation, and electric vehicle (EV) charging systems. This paper proposes a novel non‐isolated, bidirectional DC–DC converter with an improved voltage gain conversion ratio. In the structure of the proposed converter, the coupled inductor provides high voltage gain and is employed to reduce the overall voltage stress across the main switches. Additionally, a filter inductor on the input‐low voltage side of the converter reduces current ripple. In addition, a single switch is used in boost mode, which simplifies control of the converter. Furthermore, two power switches receive simultaneous pulses for adjusting the buck stage voltage gain. Also, in the following, the mathematical calculations and the small signal analysis for the proposed converter are provided. Furthermore, a 200 W prototype is finally implemented, and its results are validated by the theoretical analysis.

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“…These ZVT converters all need additional inductors as resonant inductors, which are disadvantageous to the improvement of power density because of the large volume and weight of magnetic components. Several soft-switching technologies based on coupled inductors have been proposed in [19][20][21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…In [27], several ZVS DC-DC converters based on coupled inductors are proposed by changing the connection position of the coupling branch. A ZVS magnetic coupling BDC with no current notch at the low-voltage port is proposed in [28]. In [29], a ZVT PWM BDC based on coupled inductors is proposed.…”

Section: Introductionmentioning

confidence: 99%

A Family of Zero-Voltage-Transition Magnetic Coupling Bidirectional DC/DC Converters

2023

Self Cite

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In this paper, a family of zero-voltage-transition (ZVT) magnetic coupling bidirectional DC/DC converters (BDCs) is proposed. The coupling inductor has two functions: to serve as a filter; and to provide the auxiliary current. In addition, the phase-shifting control method is used to reduce the conduction loss of the auxiliary circuit. The auxiliary switches are all working under zero-current-switching (ZCS) conditions; thus, all the switches have no switching loss. Furthermore, compared with the traditional ZVT implementation method based on the coupled inductor, this topology avoids the input source current notch and has a smaller ripple. Finally, a prototype of 800 W BDC is built to verify the feasibility of the proposed topology.

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Coupled inductor based zero-voltage-switching buck/boost converter

Cited by 3 publications

References 31 publications

Simulation optimal and design of 3-kW DC-DC converter for pure electric vehicles

Simulation optimal and design of 3-kW DC-DC converter for pure electric vehicles

A bidirectional high voltage ratio DC–DC topology for energy storage systems in microgrid

A Family of Zero-Voltage-Transition Magnetic Coupling Bidirectional DC/DC Converters

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