Prof. Patrick Wheeler
PEMC Research Institute, University of Nottingham, Nottingham, UK
+1
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Academic Career Length
30Years (1997-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
View All Publications7 August 2002 in IEEE Transactions on Industrial Electronics
Journal Article
Patrick Wheeler
Jose RodriguezJCJ.C. Clare
J.C. ClareLEL. Empringham
L. Empringham
AWAlejandro Weinstein
Alejandro WeinsteinThe matrix converter is an array of controlled semiconductor switches that connects directly the three-phase source to the three-phase load. This converter has several attractive features that have been investigated in the last two decades. In the last few years, an increase in research work has been observed, bringing this topology closer to the industrial application. This paper presents the state-of-the-art view in the development of this converter, starting with a brief historical review. An important part of the paper is dedicated to a discussion of the most important modulation and control strategies developed recently. Special attention is given to present modern methods developed to solve the commutation problem. Some new arrays of power bidirectional switches integrated in a single module are also presented. Finally, this paper includes some practical issues related to the practical application of this technology, like overvoltage protection, use of filters and ride-through capability.
18 August 2011 in IEEE Transactions on Industrial Electronics
Journal Article
Jose Rodriguez
Marco RiveraJKJohan W. Kolar
Johan W. Kolar
Patrick WheelerThis paper presents a review of the most popular control and modulation strategies studied for matrix converters (MCs) in the last decade. The purpose of most of these methods is to generate sinusoidal current on the input and output sides. These methods are compared considering theoretical complexity and performance. This paper concludes that the control strategy has a significant impact on the resonance of the MC input filter.
13 June 2011 in IEEE Transactions on Industrial Electronics
Journal Article
JKJohann W. Kolar
Johann W. Kolar
TFThomas Friedli
Thomas Friedli
Jose RodriguezPatrick WheelerThis paper presents first an overview of the well-known voltage and current dc-link converter topologies used to implement a three-phase PWM ac-ac converter system. Starting from the voltage source inverter and the current source rectifier, the basics of space vector modulation are summarized. Based on that, the topology of the indirect matrix converter (IMC) and its modulation are gradually developed from a voltage dc-link back-to-back converter by omitting the dc-link capacitor. In the next step, the topology of the conventional (direct) matrix converter (CMC) is introduced, and the relationship between the IMC and the CMCs is discussed in a figurative manner by investigating the switching states. Subsequently, three-phase ac-ac buck-type chopper circuits are considered as a special case of matrix converters (MCs), and a summary of extended MC topologies is provided, including three-level and hybrid MCs. Therewith, a common knowledge basis of the individual converter topologies is established.
1 December 2014 in IEEE Electrification Magazine
Journal Article
Patrick WheelerSBSerhiy Bozhko
Serhiy BozhkoThe More Electric Aircraft concept offers many potential benefits in the design and efficiency of future large, manned aircraft. In this article, typical aircraft electrical power systems and associated loads are described as well as the exciting future challenges for the aerospace industry. The importance of power electronics as an enabling technology for this step change in aircraft design is considered, and examples of typical system designs are discussed.
9 December 2011 in IEEE Transactions on Industrial Electronics
Journal Article
TFThomas Friedli
Thomas Friedli
JKJohann W. Kolar
Johann W. Kolar
Jose RodriguezPatrick WheelerThis paper introduces the methodology and the results of a comprehensive comparison of a direct matrix converter (MC), an indirect MC, and a voltage dc-link back-to-back converter for a 15-kW permanent magnet synchronous motor drive. The comparison involves the investigation of the passive components, including the EMI input filter, the required silicon chip area for a defined maximum admissible thermal loading of the power semiconductors, the total losses and/or achievable efficiency, a prediction of the resulting volume and weight of the passive components, and, finally, a tradeoff study between the efficiency, volume, and weight of the converters. Different performance indicators that ultimately allow a systematic determination of the application area of each converter topology are provided with this comparative evaluation.
23 January 2013 in IEEE Transactions on Power Electronics
Journal Article
SSShuai Shao
Shuai Shao
Patrick WheelerJCJon C. Clare
Jon C. ClareAWAlan J Watson
Alan J WatsonThis letter presents a fault detection method for modular multilevel converters which is capable of locating a faulty semiconductor switching device in the circuit. The proposed fault detection method is based on a sliding mode observer (SMO) and a switching model of a half-bridge, the approach taken is to conjecture the location of fault, modify the SMO accordingly and then compare the observed and measured states to verify, or otherwise, the assumption. This technique requires no additional measurement elements and can easily be implemented in a DSP or microcontroller. The operation and robustness of the fault detection technique are confirmed by simulation results for the fault condition of a semiconductor switching device appearing as an open circuit.
About Me
Prof Pat Wheeler received his BEng [Hons] degree in Electrical Engineering in 1990 from the University of Bristol,
UK. He received his PhD degree for his work on Matrix Converters from the University of Bristol, UK, in 1994. In 1993, he moved to the University of Nottingham and worked as a research assistant in the Department of Electrical and Electronic Engineering. In 1996, he became a Lecturer for the Power Electronics, Machines and Control Group at the University of Nottingham, UK. Since
January 2008, he has been a Full Professor in the same research group. He is currently the Director for Global Engagement in the Faculty of Engineering and the Head of the Power Electronics, Machines and Control Research Group. He was Head of the Department of Electrical and Electronic Engineering at the University of Nottingham from 2015 to 2018. He has been a member of the IEEE PELs AdCom (2011 to 2024) and was IEEE PELS Vice President for Technical Operations from 2020 to 2024. He is currently a member of the IEEE PSPB as Chair of the Thesaurus Editorial Board. He has published over 1000 academic publications in leading international conferences and journals.