Thursday, 27 June, 2019
Chairperson: Dr. Puqi Ning, Institute of Electrical Engineering, Chinese Academy of Sciences, China
A High-Power Miniaturized Wireless EV Charger with a New SiC-VMOSFET driven Single-Ended Inverter
In this paper, a high- power and high-frequency single-ended wireless EV charger with a newly developed SiC-VMOSFET is described. Losses of SiC-MOSFET and Si-IGBT under international standard high-frequency operation are discussed and it is indicated that SiC-MOSFET is suitable. Although a high voltage devise of 1700V is necessary for a 3kW high-power single-ended wireless EV charger, very high conduction loss of high voltage MOSFET makes the implementation difficult. Indicated is that a newly developed SiC-VMOSFET(V-groove trench) is the solution of this problem. In addition, FWD (Fly Wheel Diode) constructions are comparatively studied in a practical point of view.
Yuki Tono is currently a senior student in Osaka Institute of Technology, Japan, and belongs to power electronics laboratory.
He presently studies bidirectional WPT for wireless V2H system, and development of SiC-MOSFET for single-ended converters.
Reliable High-temperature SiC Power Module for Automotive Traction Inverter
In this paper, a reliable high-temperature power module packaging concept for the automotive powertrain is presented. Advanced joining provide superior reliability in order to meet future automotive requirements, In addition, epoxy molded modules in half-bridge configuration are designed for robustness, easy inverter integration and low costs. The power module package can accommodate both SiC and Si chips in order to offer a simple scalability for inverter classes in different power range.
Chunlei Liu is a principal scientist at ABB Corporate Research Center Switzerland. He received his M.S. in materials science from Central South University, China in 2003, and his Ph.D. from ETH Zurich, Switzerland in 2007. He joined ABB since 2007 and worked both at Corporate Research and ABB Semiconductors. His work focus on the advanced power electronics packaging design and specialized in the area of reliable high temperature interconnection technologies for new generation power devices.
Light Load Efficiency Optimization for Synchronous Converter in Passenger Vehicle
In this paper, power loss is calculated precisely for each component in synchronous converter at light load. By comparing total power loss between Diode Emulation Mode (DEM) and Forced Continuous Conduction Mode (FCCM), operation mode can be selected for higher efficiency. Using DEM can increase efficiency by up to 7.8% when output current of 48-12V Buck converter is 500mA. Using FCCM can increase efficiency by up to 9.2% when output current of Boost derived LED driver is 58m A.
Mengyu Li was born in Xi'an, China, on April 11th, 1998. She will receive her B Sc. Degree in Xidian University in 2019. She work in Automotive System Engineering department of Infineon Integrated Circuit (Beijing) Co., Ltd from August 2018. Her research interest includes Switch Mode Power Supply IC design.
High Efficiency Cooling Technology for High Power Density Automotive IGBT Module
An aluminum direct liquid cooling technology was applied for our IGBT module for HEV and EV applications. The high cooling capability is achieved by applying wavy fin structure which can effectively dissipate the heat generated by power semiconductor devices. In addition, this wavy fin successfully realizes the good flow speed distribution in the flow pass. Our newly developed direct liquid cooling IGBT module with high performance wavy fin realizes reduction of the thermal impedance of 20 %.
Kohei Yamauchi is an engineer in Fuji Electric. He follows IGBT modules for automotive application. He mainly developed IGBT module with direct water cooling.
Hardware-in-Loop Real-Time Test Bed for Microgrid Systems with Multi-Level Control
Power electronic application fields have been broadened from single power supply to more and more complicated systems like smart grid interfaced with different kinds of power electronic converters because of continued evolution of renewable energy technology, which brings about great challenges to build a flexible physical platform that could adapt to test different power electronic systems in smart grid. Our research group presents a hardware-in-loop real-time testbed for microgrids consisting of multi-distributed generators, local loads with multi-level control technology. And the platform can be used in many aspects of microgrid research.
Xun Jiang, Graduate student of Hefei University of Technology. The research direction is single-phase power decoupling inverter, Inverter controller parameters identification and microgrid technology.