An Efficiency Optimization Scheme for Bidirectional Inductive Power Transfer Systems

IEEE Trans. Ind. Electron.

2017

Abstract-The series-resonant converter (SRC) has been used in several application and it recently became popular for Smart Transformers (STs). In this application, the efficiency and reliability are of paramount importance. Although many papers have addressed the design challenges to improve the converter efficiency, discussions about the reliability are still missing in literature. In this context, this paper presents a design procedure focusing on the efficiency and reliability improvement of the SRC for ST application. High efficiency is achieved through the use of Silicon-Carbide (SiC) MOSFETs, reducing conduction and switching losses, and the detail design procedure based on accurate losses modeling. High reliability is achieved through a fault tolerant topology and reliability-oriented design of the resonant circuit passive components. Experimental results obtained for the optimized 10 kW series resonant converter has shown an efficiency of 98.61%.

Section: Introductionmentioning

confidence: 99%

Highly Efficient and Reliable SiC-Based DC–DC Converter for Smart Transformer

IEEE Trans. Ind. Electron.

2017

“…The series-resonant dc-dc converter (SRC) has been very used in a large range of voltage and power application, such as wireless power transfer for electrical vehicle [1] - [4] (24-600 V / 5-100 kW), battery charger [5] - [6] (24-600 V / 5 100 kW), renewable energy system [7]- [10] (0.1-500 kV / 0.1-100 MW) and high voltage power supply for specific application, such as traveling-wave tube (TWT) for satellite application [11] (1-10 kV / 1-100 kW). Because of its characteristic of output voltage regulation in open loop, associated to its feature of soft-switching, the converter became very popular in Smart Transformer (ST) [12] application.…”

Section: Introductionmentioning

confidence: 99%

“…The main waveforms in this operation mode are shown in Fig 3. To support the analysis, the variables resonant frequency ( f o ), resonant angular frequency (ω 0 ) and characteristic impedance of the resonant network (Z) are defined by (1), in terms of the resonant inductor (L r ) and capacitor (C r ) of the tank circuit.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Highly efficient and reliable DC-DC converter for smart transformer

2017 IEEE Applied Power Electronics Conference and Exposition (APEC)

2017

Abstract-The series-resonant converter (SRC) has been used in several application and it recently became popular for Smart Transformers (STs). In this application, the efficiency and reliability are of paramount importance. Although many papers have addressed the design challenges to improve the converter efficiency, discussions about the reliability are still missing in literature. In this context, this paper presents a design procedure focusing on the efficiency and reliability improvement of the SRC for ST application. To improve the efficiency, losses modeling in all components is carefully carried out. Additionally, SiliconCarbide (SiC) MOSFETs are used to reduce the conduction and switching losses. The reliability is addressed on the converter design by taking the lifetime of the resonant capacitor and the stress on the main components. Experimental results obtained for the optimized 10 kW series resonant converter has shown an efficiency of 98.61%.

“…The series-resonant dc-dc converter (SRC) has been very used in wireless power transfer application for electrical vehicle [1] - [4], battery charger [5] - [6], renewable energy system [7]- [10] and high voltage power supply for specific application, such as traveling-wave tube (TWT) for satellite application [11]. Recently, this topology became very popular in Smart Transformer (ST) [12]- [15], mainly because of its characteristic of output voltage regulation in open loop associate to its high efficiency.…”

Section: Introductionmentioning

confidence: 99%

Bidirectional series-resonant DC-DC converter with fault-tolerance capability for smart transformer

2016 IEEE Energy Conversion Congress and Exposition (ECCE)

2016

Abstract-The Series-Resonant dc-dc converter (SRC) is widely used in several application and it became very popular in Smart Transformer application. In this application, fault tolerance is a highly desired feature and it is obtained through redundancy. This paper proposes a reconfiguration scheme for the SRC for the case of failure in one semiconductor, which could drastically reduce the need of redundancy. Using the proposed scheme, the full-bridge based SRC can be reconfigured in a half-bridge topology, in order to keep the converter operational even with the failure (open circuit or short circuit) of one switch. The theoretical analysis is carried out for the unidirectional SRC and then extended to the bidirectional topology, since bidirectionality is required in smart transformer application. To verify the feasibility of the proposed scheme, the converter is tested experimentally in a 700 V to 600 V prototype with 10 kW of output power. A IGBT short-circuit fault is tested and the results confirms the effectiveness of the proposed approach.