Telyakovsky S.A. Coleção de problemas de teoria das funções de uma variável real

 

Design and evaluation of automotive power module : 650V GaN E-HEMT with meandered interconnection and integrated motor-inverter power module---GaN E-HEMT 소자용 인터커넥션과 자동차용 모터-인버터 통합구조 파워모듈의 설계 및 평가

Design and evaluation of automotive power module : 650V GaN E-HEMT with meandered interconnection and integrated motor-inverter power module By Jihwan Seong

 A thesis submitted to the graduate school of Hanyang University for the degree of Doctor of philosophy Department School of Hanyang university 

ABSTRACT 

 With increasing demand in automotive fuel efficiency and ever-strengthening global carbon dioxide emission regulations, electrification has become an indispensable trend. Especially in the automobile industry, miniaturization and performance are other major challenges, and they should be considered with electrification as goals in the equipment design stage. Because of the challenges, a tailored design and evaluation process is necessary for power modules that perform high-level power conversion for motor driving. This dissertation attempts to present the design and evaluation of power modules used in electrified vehicles. The dissertation starts with the configuration of a power module and a description of each module component. A power module includes power devices and packaging components. Among the power devices, wide bandgap (WBG) devices have recently been widely used in power modules, and their characteristics are described. In addition, the roles of packaging components and their design considerations are presented. Because the power module treats electric power, electrical verification is important. Electrical verification methods based on the finite element method (FEM) and circuit simulation tools are introduced. The aforementioned design and evaluation methods are applied to the proposed models of two applications. First, a new interconnection design is proposed. The interconnection is specially designed for the GaN E-mode High-electron-mobility Transistor (E-HEMT). The design process for the proposed interconnection is presented in detail, and a parametric study is conducted considering major design variables, to achieve minimum parasitic inductance and thermal resistance objectives. The expected advantages of the optimal interconnection design, as obtained from the parametric study, are described. To verify these expected advantages, various simulations and experiments are conducted. A prototype of the proposed interconnection is fabricated and experimentally evaluated. Secondly, the inverter power module is designed and analyzed to be applied in the motor-inverter integrated structure of the electric compressor and starter-generator components used in 48-V mild hybrid vehicle system. An improved power module design is proposed, and it demonstrates all of the electrical and thermal performances required in the integrated structure. The performances are evaluated by conducting electrical/thermal simulations and experiments. As a result, the superiority of the proposed interconnection for GaN E-HEMTs and the improved power module considering the integrated structure was demonstrated, and their evaluation processes were validated based on the similarity between the simulation and experimental results.

LINK: 

http://www.riss.kr/search/detail/DetailView.do?p_mat_type=be54d9b8bc7cdb09&control_no=6224a1e85e0d3ab0ffe0bdc3ef48d419&keyword=INVERTER%20GaN

Magnetic design of a 3-phase SiC-based PV inverter with DC-link referenced output filter ALEJANDRO RUJAS1,2, ITSASNE LANDABURU1, VICTOR M. LOPEZ-MARTIN1 AND OSCAR BARAMBONES2,

 Magnetic design of a 3-phase SiC-based PV inverter with DC-link referenced output filter BY

 ALEJANDRO RUJAS1,2, ITSASNE LANDABURU1, VICTOR M. LOPEZ-MARTIN1 AND OSCAR BARAMBONES2, 1IKERLAN 

Technology Research Centre, Basque Research and Technology Alliance (BRTA), Arrasate-Mondragon, Basque Country, Spain (e-mail: arujas@ikerlan.es) 2

Departament of Automatic Control and System Engineering, Engineering School, University of the Basque Country UPV/EHU, Vitoria, Basque Country, Spain 

 This work was supported in part by the European Union’s Horizon 2020 research and innovation programme funding, under the grant agreement number 783158 

ABSTRACT 

The use of Silicon carbide (SiC) devices represents an improvement in terms of size, weight and efficiency of power converters. However, SiC-based solutions present high dv/dt and di/dt on the switching events, increasing the common-mode noise injected into the grid. To reduce the common-mode noise, three-phase inverters with a DC-link referenced output filter are widely considered in photovoltaic (PV) inverters connected to the grid. However, if the filter is DC-link referenced the inductor ripple is larger, and this must be considered for the AC inductor filter design. This work shows, on a PV inverter, the impact of that DC-link referenced filter on the current ripple of the inductor, and the improvement achieved with the use of SiC devices, increasing the switching frequency. A comparison in terms of weight, size, losses and materials costs is presented for different core materials and configurations.

VIEW FULL TEXT: https://www.researchgate.net/publication/369125848_Magnetic_design_of_a_3-phase_SiC-based_PV_inverter_with_DC-link_referenced_output_filter

Magnetic Design and Experimental Evaluation of a Commercially Available Single Integrated Transformer in Three-phase LLC Resonant Converter-Mostafa Noah, Student Member, IEEE, Shota Kimura, Jun Imaoka, Member, IEEE, Wilmar Martinez, Member, IEEE, Shun Endo, Masayoshi Yamamoto, Member, IEEE and Kazuhiro Umetani Member, IEEE,

 

Magnetic Design and Experimental Evaluation of a Commercially Available Single Integrated Transformer in Three-phase LLC Resonant Converter-Mostafa Noah, Student Member, IEEE, Shota Kimura, Jun Imaoka, Member, IEEE, Wilmar Martinez, Member, IEEE, Shun Endo, Masayoshi Yamamoto, Member, IEEE and Kazuhiro Umetani Member, IEEE, 

M. Noah, J. Imaoka and M. Yamamoto are with the Power Electronics Lab of Nagoya University, Furo-cho, Chikusa-ku, Japan. (email: mostafa.noah@ieee.org; imaoka@nuee.nagoya-u.ac.jp; m.yamamoto@imass.nagoya-u.ac.jp) S. Kimura and S. Endo are with the Department of Mechanical, Electrical and Electronic engineering, Shimane University, 1060 Nishikawatsu, Matsue, Japan. 

 Abstract—Multi-phase topologies are preferably employed in power conversion systems to lessen the per phase circuit current, conduction losses, devices thermal stresses, and to reduce the output current ripples. Multi-phase LLC resonant dc/dc converter usually possess a number of magnetic cores equal to the number of phases. These magnetic cores are the major contributors to supply volume, weight, and size. For these reasons, circuit designers tend to select the topologies that have a minimal number of magnetic cores. In this paper, the authors aim to promote the industrial applications of the three-phase LLC resonant converter by integrating three transformers into a single, commercially available, magnetic core to reduce the volume, weight, and cost of the power converter. A comprehensive magnetic analysis for the three-phase integrated transformer is conducted. FEM Simulation and experimental tests are carried out to validate the proper operation of the integrated transformer utilized in a 390/12V-500W prototype. Furthermore, the power losses distribution has been presented. The proposed integrated transformer has been proven efficient, and it realized a uniform thermal distribution along the core compared to the three discrete transformers.

VIEW FULL TEXT: https://lirias.kuleuven.be/retrieve/514840

Electric vehicle charging station circuit architecture-Arquitetura do Circuito da estação de carregamento de veiculos elétricos-電動汽車充電站電路架構