Wideband Wireless Power Transfer for Human-Involved Environment
Jan. 2017 – present, Biomedical-Electromagnetics Group, SUTD, Singapore
The existence of highly dielectric human body has significant influence on the efficiency of wireless power transfer (WPT) systems, which is a great challenge for applying resonance-based WPT into human-involved environments. A wideband WPT system can maintain a high transfer efficiency over a large frequency band, therefore helps to mitigate the effect of human body. An equivalent circuit model for analyzing wideband WPT was proposed by us, and has been applied for helping design wideband WPT systems.
W. Zhou, P. Wu, and S. Y. Huang, “A Compact Broadband Double-sided Planar Spiral Resonator for a Robust and Stable Wireless Power Transfer System,” under review.
W. Zhou, S. Sandeep, P. Wu, P. Yang, W. Yu, and S. Y. Huang, ”A wideband strongly coupled magnetic resonance wireless power transfer system and its circuit analysis,” IEEE Microw. Wireless Compon. Lett., vol. 28, no. 12, pp.1152-1154, 2018.
W. Zhou, Omkar, and S. Y. Huang, “Electromagnetic Bandgap Structure Enhanced Ellipsoidal Coils for Wireless Power Transfer for Ingestible Devices,” Asian Wireless Power Transfer Workshop 2017, Singapore, Dec 2017.
W. Zhou, Omkar, and S. Y. Huang, “Novel Coil Design for Wideband Wireless Power Transfer,” The 2017 International Applied Computational Electromagnetics Society Symposium in China, Suzhou, Aug 2017.
An Accurate Model For Fast Calculating Resonant Frequency of Irregular Solenoids
May 2018 – present, Biomedical-Electromagnetics Group, SUTD, Singapore
Resonant frequency is a key parameter of solenoid coils. Conventional analytical models are only applicable for tightly-wound cylindrical-shape solenoid coils, and malfunction for irregular solenoids, such as sparsely-wound solenoids, solenoids with non-uniform pitches, and solenoids with a non-cylindrical shape. Commercial full-wave simulation software is commonly used for modelling these irregular solenoids, but it is usually labor-intensive and time-consuming. Therefore, we developed a model for calculating the resonant frequency of solenoid coils, which provides accurate result for all the aforementioned types of irregular solenoids, and the computation time is only 6% of that of a commercial software.
W. Zhou, and S. Y. Huang, ”An accurate model for fast calculating the resonant frequency of an irregular solenoid”, IEEE Trans. Microw. Theory Techn. , vol. 67, no. 7, pp.2663-2673, 2019
Powertrain and Sensor Network Design of an Electric Vehicle and Driving Data Analysis
Sep. 2015 – Jun. 2016, Motion, Energy and Control Lab, SUTD, Singapore
I was responsible for the design and implementation of the electric powertrain of an electric vehicle. I also designed the sensor network of the vehicle, which could monitor, display and record several essential parameters while driving, including vehicle speed, total range, battery voltage and current, battery temperature and motor temperature. Based on the driving parameters allocated, I developed a dynamic programming algorithm for generating driving cycles to describe driving patterns, and applied it to a carbon footprint evaluation application for electric vehicles.
C. M. Tseng, W. Zhou, M. A. Hashmi, C. K. Chau, S. G. Song, and E. Wilhelm, “Data extraction from electric vehicles through OBD and application of carbon footprint evaluation, ” ACM eEnergy Workshop on Electric Vehicle Systems, Data and Applications, Waterloo, Jun 2016
Design and Simulation of the Vector Control System for a Permanent Magnetic Synchronous Motor Based on Simulink
Dec. 2014 – Jun. 2015, Corporate Research and Technology, Eaton Corporation, Shanghai, China & Harbin Institute of Technology, Harbin, China
Vector control is a widely adopted control strategy for PMSM. Based on Matlab/Simulink, a dual closed-loop vector control system for PMSM is designed and simulated, which consists of a current loop and a speed loop. The current loop is designed with complex vector method in discrete domain directly to mitigate the degradation of system performance in situations where sampling-frequency is low or electrical frequency is high. With this design, deadbeat control can be realized by introducing a predictive item, which is the theoretically fastest response of a PMSM.
W. Zhou, “Design and Simulation of the Vector Control System for a Permanent Magnetic Synchronous Motor Based on Simulink,” B. Eng. Thesis, Harbin Institute of Technology, Harbin, Jun 2015