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Chen, Zhengge

Chen, Zhengge

PROJECT TITLE: Mission Profile based Efficiency and Reliability Improvement for AC-DC Converters 

PhD period: 2017.11.01 – 2020.10.31.
Section: Power Electronic Systems
Research Programmes: Efficient and Reliable Power Electronics 
Supervisor: Huai Wang
Co-Supervisor: Pooya Davari
Contact Information

Funding: China Scholarship Council (CSC).


Alternating Current (AC) and Direct Current (DC) have long existed since the very beginning of power electricity use. Although historically, these two currents have competed for being the grid form in 1890s, now we use both them in our daily lives and industrial applications, which also makes the conversion between AC and DC a key role in our modern society. Among AC and DC conversion, AC-DC converters are widely used from adapters of portable devices with power level <100W to rectifiers in Uninterruptible Power Supply (UPS) with power level up to 5MkW. The importance of AC-DC converters cannot be ignored obviously.

The recent rapid and huge growth of data center and telecommunication facilities brings lots of attentions on energy-efficient data center development including investigating high efficient AC-DC converters. However, behind these efficiency improvement methods for AC-DC converters, there are few attentions on their impact on the converters’ reliability, while reliability is usually the first interests of industrial manufacturers and consumers.

This project is aiming to reveal two questions: how and to what degree these state of the art efficiency improvement methods will impact the reliability on AC-DC converters; and is there any method improve both efficiency and reliability, or can just make a tradeoff between them. For achieving this project’s goal, a specific applications should be chosen for the reason that the reliability is highly relative to the mission profile of a converter. And in terms of the widely concerns about reliability and efficiency in data centers and telecommunication facilities, this project will select this specific area to investigate the unsolved questions.


Publications in journals and conference papers may be found at VBN.