Soft-Switching Power Electronics Technology for Electric Vehicles: A Technology Review

Pahlevani, Majid; Jain, Praveen

doi:10.1109/jestie.2020.2999590

Cited by 46 publications

(25 citation statements)

References 69 publications

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“…Eq. (17) shows the relation between the inputs and output voltages, which is derived by applying volt-second balance to the magnetizing inductance in (16):…”

Section: A2 Disomentioning

confidence: 99%

“…In the modern dc-dc converter applications, to reduce the size of passive components and to increase the power density, the switching frequency should be selected as high as possible. However, by increasing the switching frequency, the frequency related losses also increase [17][18][19]. Providing soft-switching to minimize such losses in MICs and/or TPCs is a challenging task as there are multiple switches with different switching patterns and there are various possible power flow paths and current directions among several energy sources, energy storage devices, and the load.…”

Section: Introductionmentioning

confidence: 99%

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Soft-Switched Three-Port DC-DC Converter With Simple Auxiliary Circuit

et al. 2021

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In this paper, a new high efficiency soft-switching non-isolated three-port converter (TPC) is proposed. In the conventional TPC, three switches are required to process power in different directions between inputs and output. Providing soft-switching condition for all switches using a low number of auxiliary components is a challenging task. In this paper, the conventional TPC topology is modified by changing its structure and adding a simple auxiliary circuit such that all switches operate under soft-switching condition in all operating modes. To reduce the volume of the converter, the magnetic components are integrated using a coupled inductor in the auxiliary soft-switching cell. In this paper, various converter operating modes are presented, and design considerations are discussed. Finally, a prototype 200 W, 100 V converter is implemented in the laboratory, and the theoretical analysis is validated by the experimental results.INDEX TERMS Distributed energy systems, dc-dc converters, soft-switching, hybrid power system, multi-input converter.

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“…Eq. (17) shows the relation between the inputs and output voltages, which is derived by applying volt-second balance to the magnetizing inductance in (16):…”

Section: A2 Disomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Soft-Switched Three-Port DC-DC Converter With Simple Auxiliary Circuit

et al. 2021

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“…In this mode, V in1 and V in2 contribute to the volt-second balance principle calculation of magnetizing inductance (7), results in the voltage gain can be calculated by (8).…”

Section: ) Mode IVmentioning

confidence: 99%

“…However, switching loss increases and imposes larger size heat-sinks to dissipate the heat [6], [7]. To meet the high switching frequency and mitigating the switching loss, softswitching methods must be employed [8]. However, implementing soft-switching methods in multi-port converters is not a straightforward method [9], [10].…”

Section: Introductionmentioning

confidence: 99%

Efficient Multi-Port Bidirectional Converter With Soft-Switching Capability for Electric Vehicle Applications

et al. 2021

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In this paper, to solve the hard-switching operation problem and the lack of existing a bidirectional power flow path from output to the energy storage device of the conventional three-port converter, a new soft-switched bidirectional multi-port converter is proposed. A large number of switches, different power flow paths which vary in each operating mode, and changing the outputs and their power levels are some of the challenges to provide soft-switching conditions in multi-port converters. In the proposed converter, by changing the topology of the conventional three-port converter, the bidirectional power exchangeability between ports is provided. Moreover, a soft-switching cell is added, which can operate independently from the output power levels. Less number of components with low volume is one of the important features of this multi-port converter. Due to the soft-switching operation of the proposed converter, the size of passive components and heat-sink is reduced. In addition, by the use of coupled inductors in the soft-switching cell, only one magnetic core is used and thus, single-stage power conversion is achieved and conduction loss is reduced. In this paper, the converter operating modes are presented, and design considerations are discussed. Finally, a 200 W-200 V prototype is implemented, and the theoretical analysis is validated by the experimental results.INDEX TERMS Multi-port converter, dc-dc converter, soft-switching, electric vehicle, hybrid power systems.

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“…Full-bridge DC-DC converter FBC (see Fig. 1) is one popular configuration being used for control of power flow to wide range high-power applications [4]- [8]. High-power FBC consists of several functional blocks, such as, 1.…”

Section: Introductionmentioning

confidence: 99%

Efficacy of STC in Magnetically Coupled High Frequency Power Electronics Systems: Full-Bridge DC-DC Converter

Paul¹

2021

Preprint

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Due to its simple gain selection and implementation procedures high-gain sliding mode control idea was introduced. Apart from achieving robustness features, the aim was to reduce product-design cycle time. To overcome its basic chattering issues, it was replaced by complex super twisting control (STC). Subsequently, the research in this field has been extensive, intense and persistent. The idea has been validated in several applications generating great hope in minds of industry experts. Its real success, however, would depend on its adoption and diffusion into industry domain, where an analysis of validating STC based products is due. In STC, selection of gains is based on worst-case values of disturbance and/or its derivative. Can such procedure ensure controller’s reliable functioning? This article proposes that such simplistic procedure of gain selection may not work for power electronics controllers where, particularly, the actuation or controlled power transfer to load is through magnetically-coupled system. Using practical approach, this article elaborates that optimally designed transformer, driven by high-gain super twisting controller, invites problem of core saturation leading to higher switching losses, poor operating duty cycle of the system and there could be problem of reliability. It further details an alternate high-gain controller that generates superior efficacy.

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Soft-Switching Power Electronics Technology for Electric Vehicles: A Technology Review

Cited by 46 publications

References 69 publications

Soft-Switched Three-Port DC-DC Converter With Simple Auxiliary Circuit

Soft-Switched Three-Port DC-DC Converter With Simple Auxiliary Circuit

Efficient Multi-Port Bidirectional Converter With Soft-Switching Capability for Electric Vehicle Applications

Efficacy of STC in Magnetically Coupled High Frequency Power Electronics Systems: Full-Bridge DC-DC Converter

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