Advanced Electric Power Conversion Laboratory

Name: Minfan Fu


School of Info. Science and Tech.

ShanghaiTech University

Room 202C, SIST Building 2

393 Middle Huaxia Road

Pudong, Shanghai 201210

Tel: +86-021-20684455

Two papers from the groups of Prof. Minfan Fu and Prof. Yu Liu are accepted by IECON 2019

Recently, two papers from Center for Advanced Power and Energy Systems (CAPES), are accepted by 45th Annual Conference of the IEEE Industrial Electronics Society (IECON2019). They are jointly accomplished by the research groups of Prof. Minfan Fu (director of Advanced Electric Power Conversion Laboratory, AEPCL) and of Prof. Yu Liu (director of Power System Protection and Automation Laboratory, PSPAL). IECON is one of the most important international academic conferences focusing on contemporary industry topics ranging from electronics, controls, manufacturing, to communications and computational intelligence. The industry experts, researchers, and academics will gather and share ideas and experiences surrounding frontier technologies, breakthrough and innovative solutions and applications.

The paper entitled ‘A Novel Wireless Fast Charger Using Unregulated IPT Stage’ is published by Peng Zhao as the first author, a graduate student from Professor Minfan Fu’s group. In this paper, considering the low-efficiency issue caused by reductant power conversion and isolation stages, a novel wireless fast charger based on the unregulated inductive power transfer (IPT) stage is proposed. A DC/DC module is also introduced as the regulation stage in this new configuration. In such a system, the isolation,voltage step-down and regulation are all realized with a simplified configuration. It should be noted that, it is the first time to develop an IPT stage for high-step-down voltage conversion ratio. Finally, a 25W prototype is used as an example to achieve 120V/12V conversion. The measured peak efficiency is 82%, which is 9% higher than the state of the art product (5W, 5V/5V conversion).

experiment setup.jpg   p-effi-v.jpg

Fig.1. Experiment setup and measured efficiency under different output power

The paper entitled ‘Time Domain Coupling Coefficient Estimation Using Transmitter-side Information in Wireless Power Transfer System’ is published by Kang Yue as the first author, a graduate student from Professor Yu Liu’s group. Accurate estimation of coupling coefficient between the transmitter and the receiver is a challenge faced in the application of magnetic coupling wireless power transfer (WPT) system. This paper has proposed a time domain method to estimate the coupling coefficient. The method introduces the coupling coefficient as one of the time-varying states of the system and applies standard dynamic state estimation based method to accurately solve the states of the system including the coupling coefficient. The proposed methodology only requires the transmitter side instantaneous input voltage and current and does not have further assumptions on the WPT topology as well as system operating conditions. Experimental results of a prototype WPT system show that estimation error is smaller than 0.012 which validates the feasibility of the proposed coupling coefficient estimation method.

prototype.png   estimation results.png

Fig.2. WPT system prototype and coupling coefficientestimation results

These papers are all accomplished in ShanghaiTech University. Peng Zhao and Kang Yue are the first authors, respectively. Professor Minfan Fu and Professor Yu Liu are the corresponding authors, respectively. The research was funded by ShanghaiTech University Startup Foundation, National Natural Science Foundation of China, Shanghai Sailing Program, Shanghai Pujiang Program and Open Project of Key Laboratory of Control of Power Transmission and Conversion.