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Combining fault location estimates for a multi-tapped distribution line (2017)
Conference Proceeding
Jahanger, H., Sumner, M., & Thomas, D. W. (2017). Combining fault location estimates for a multi-tapped distribution line.

Multi-tapped lines are common in integrated power systems and microgrids which supply variable loads between the main source and the main load. Adopting a cost effective and efficient method for fault location is important for fast power recovery and... Read More about Combining fault location estimates for a multi-tapped distribution line.

Co-design/simulation of flip-chip assembly for high voltage IGBT packages (2017)
Conference Proceeding
Rajaguru, P., Bailey, C., Aliyu, A. M., Castellazzi, A., Pathirana, V., Udugampola, N., …Elliot, A. (2017). Co-design/simulation of flip-chip assembly for high voltage IGBT packages.

This paper details a co-design and modelling methodology to optimise the flip-chip assembly parameters so that the overall package and system meets performance and reliability specifications for LED lighting applications. A co-design methodology is e... Read More about Co-design/simulation of flip-chip assembly for high voltage IGBT packages.

A common ground switched-quasi-Z-source bidirectional DC-DC converter with wide-voltage-gain range for EVs with hybrid energy sources (2017)
Journal Article
Zhang, Y., Liu, Q., Li, J., & Sumner, M. (2018). A common ground switched-quasi-Z-source bidirectional DC-DC converter with wide-voltage-gain range for EVs with hybrid energy sources. IEEE Transactions on Industrial Electronics, 65(6), 5188-5200. https://doi.org/10.1109/TIE.2017.2756603

A common ground switched-quasi-Z-source bidirectional DC-DC converter is proposed for electric vehicles (EVs) with hybrid energy sources. The proposed converter is based on the traditional two-level quasi-Z-source bidirectional DC-DC converter, chang... Read More about A common ground switched-quasi-Z-source bidirectional DC-DC converter with wide-voltage-gain range for EVs with hybrid energy sources.

Analysis, modelling and design considerations for the excitation systems of synchronous generators (2017)
Journal Article
Nuzzo, S., Galea, M., Gerada, C., & Brown, N. (2018). Analysis, modelling and design considerations for the excitation systems of synchronous generators. IEEE Transactions on Industrial Electronics, 65(4), 2996-3007. https://doi.org/10.1109/TIE.2017.2756592

The traditional generating set is usually comprised of a classical, wound-field, salient-pole or cylindrical rotor synchronous generator, excited by a separate smaller machine, via a rotating, uncontrolled diode rectifier. The effects of the commutat... Read More about Analysis, modelling and design considerations for the excitation systems of synchronous generators.

An optimal full frequency control strategy for the modular multilevel matrix converter based on predictive control (2017)
Journal Article
Fan, B., Wang, K., Wheeler, P., Gu, C., & Li, Y. (in press). An optimal full frequency control strategy for the modular multilevel matrix converter based on predictive control. IEEE Transactions on Power Electronics, 33(8), https://doi.org/10.1109/TPEL.2017.2755767

The modular multilevel matrix converter (M3C) is a promising topology for high-voltage high-power applications. Recent researches have proved its significant advantages for adjustable-speed motor drives compared with the back-to-back modular multilev... Read More about An optimal full frequency control strategy for the modular multilevel matrix converter based on predictive control.

Characterisation and modelling of gallium nitride power semiconductor devices dynamic on-state resistance (2017)
Journal Article
Li, K., Evans, P., & Johnson, M. (2018). Characterisation and modelling of gallium nitride power semiconductor devices dynamic on-state resistance. IEEE Transactions on Power Electronics, 33(6), 5262 - 5273. https://doi.org/10.1109/TPEL.2017.2730260

GaN-HEMTs suffer from trapping effects which increases device ON-state resistance (RDS(on)) above its theoretical value. This increase is a function of the applied DC bias when the device is in its OFF state, and the time which the device is biased f... Read More about Characterisation and modelling of gallium nitride power semiconductor devices dynamic on-state resistance.

Cell imaging by phonon microscopy: sub-optical wavelength ultrasound for non-invasive imaging (2017)
Journal Article
Perez-Cota, F., Smith, R. J., Moradi, E., Leija, A. L., Velickovic, K., Marques, L., …Clark, M. (2017). Cell imaging by phonon microscopy: sub-optical wavelength ultrasound for non-invasive imaging

The mechanical properties of cells play an important role in cell function and behavior. This paper presents recent developments that have enabled the use of laser-generated phonons (ultrasound) with sub-optical wavelengths to look inside living cell... Read More about Cell imaging by phonon microscopy: sub-optical wavelength ultrasound for non-invasive imaging.

Thermal imaging is a non-invasive alternative to PET-CT for measurement of brown adipose tissue activity in humans (2017)
Journal Article
Law, J., Morris, D. E., Izzi Engbeaya, C., Salem, V., Coello, C., Robinson, L. J., …Symonds, M. E. (2018). Thermal imaging is a non-invasive alternative to PET-CT for measurement of brown adipose tissue activity in humans. Journal of Nuclear Medicine, 59(3), https://doi.org/10.2967/jnumed.117.190546

Background Obesity and its metabolic consequences are a major cause of morbidity and mortality. Brown adipose tissue (BAT) utilises glucose and free fatty acids to produce heat, thereby increasing energy expenditure. Effective evaluation of human BA... Read More about Thermal imaging is a non-invasive alternative to PET-CT for measurement of brown adipose tissue activity in humans.

Limits, stability and disturbance rejection analysis of voltage control loop strategies for grid forming converters in DC and AC microgrids with high penetration of constant power loads (2017)
Conference Proceeding
Navarro-Rodríguez, Á., Garcia, P., Cano, J., & Sumner, M. (2017). Limits, stability and disturbance rejection analysis of voltage control loop strategies for grid forming converters in DC and AC microgrids with high penetration of constant power loads.

This paper extensively analyzes the operation limits, system stability and disturbance rejection capability of the voltage control loops used in master-slave AC and DC Microgrids (MGs). Two different control schemes are studied analytically, simulat... Read More about Limits, stability and disturbance rejection analysis of voltage control loop strategies for grid forming converters in DC and AC microgrids with high penetration of constant power loads.

EMC-oriented multi-conductor equivalent circuit cable models for spice, including transfer impedance coupling and incident field excitation (2017)
Conference Proceeding
Smartt, C., Basford, M., Greedy, S., Thomas, D., & Sumner, M. (2017). EMC-oriented multi-conductor equivalent circuit cable models for spice, including transfer impedance coupling and incident field excitation. In Proceedings of the 2017 19th International Conference on Electromagnetics in Advanced Applications (1283-1287). https://doi.org/10.1109/ICEAA.2017.8065507

This paper describes the development and application of sophisticated multi-conductor cable bundle models for Spice simulation. The cable models developed include frequency dependent parameters, transfer impedance coupling and incident plane wave exc... Read More about EMC-oriented multi-conductor equivalent circuit cable models for spice, including transfer impedance coupling and incident field excitation.

Design and development of a high-density, high-speed 10 kV SiC MOSFET module (2017)
Conference Proceeding
Di Marino, C., Boroyevich, D., Burgos, R., Johnson, C. M., & Lu, G. (2017). Design and development of a high-density, high-speed 10 kV SiC MOSFET module.

High-density packaging of fast-switching power semiconductors typically requires low parasitic inductance, high heat extraction, and high thermo-mechanical reliability. High-density packaging of high-voltage power semiconductors, such as 10 kV SiC MO... Read More about Design and development of a high-density, high-speed 10 kV SiC MOSFET module.

A new analysis for finding the optimum power rating of low voltage distribution power electronics based on statistics and probabilities (2017)
Conference Proceeding
Ganjavi, A., Christopher, E., Johnson, C. M., & Clare, J. C. (2017). A new analysis for finding the optimum power rating of low voltage distribution power electronics based on statistics and probabilities.

The continuing trend toward heavier load and high penetration of Distribution Generation (DG) units in low voltage rural distribution feeders requires power electronic-based solution alternatives for voltage regulation purposes. The design of power e... Read More about A new analysis for finding the optimum power rating of low voltage distribution power electronics based on statistics and probabilities.

Integrated design of motor drives using random heuristic optimization for aerospace applications (2017)
Conference Proceeding
Cheong, B., Giangrande, P., Galea, M., Zanchetta, P., & Wheeler, P. (2017). Integrated design of motor drives using random heuristic optimization for aerospace applications.

High power density for aerospace motor drives is a key factor in the successful realization of the More Electric Aircraft (MEA) concept. An integrated system design approach offers optimization opportunities, which could lead to further improvements... Read More about Integrated design of motor drives using random heuristic optimization for aerospace applications.

Carbon dioxide measurements using long period grating optical fibre sensor coated with metal organic framework HKUST-1 (2017)
Journal Article
Hromadka, J., Tokay, B., Correia, R., Morgan, S. P., & Korposh, S. (2018). Carbon dioxide measurements using long period grating optical fibre sensor coated with metal organic framework HKUST-1. Sensors and Actuators B: Chemical, 255(3), https://doi.org/10.1016/j.snb.2017.09.041

An optical fibre long period grating (LPG) based carbon dioxide (CO2) sensor coated with HKUST-1, a material from the metal organic framework family, functional coating is presented. In-situ crystallization and layer by layer (LbL) techniques of HKUS... Read More about Carbon dioxide measurements using long period grating optical fibre sensor coated with metal organic framework HKUST-1.

Use of optical fibres for multi-parameter monitoringin electrical AC machines (2017)
Conference Proceeding
Hind, D. M., Gerada, C., Galea, M., Borg Bartalo, J., Fabian, M., Sun, T., & Grattan, K. T. (2017). Use of optical fibres for multi-parameter monitoringin electrical AC machines.

This paper describes a new approach to multi-parameter monitoring for electrical AC machines. It is demonstrated that speed, torque and temperature can be measured using optical fibres incorporating sensors in the form of fibre Bragg gratings (FBGs)... Read More about Use of optical fibres for multi-parameter monitoringin electrical AC machines.

A Wide Input-Voltage Range Quasi-Z-Source Boost DC–DC Converter With High-Voltage Gain for Fuel Cell Vehicles (2017)
Journal Article
Zhang, Y., Fu, C., Sumner, M., & Wang, P. (2018). A Wide Input-Voltage Range Quasi-Z-Source Boost DC–DC Converter With High-Voltage Gain for Fuel Cell Vehicles. IEEE Transactions on Industrial Electronics, 65(6), 5201-5212. https://doi.org/10.1109/TIE.2017.2745449

A quasi-Z-source Boost DC-DC converter which uses a switched-capacitor is proposed for fuel cell vehicles. The topology can obtain a high voltage gain with a wide input-voltage range, and requires only a low voltage stress across each of the componen... Read More about A Wide Input-Voltage Range Quasi-Z-Source Boost DC–DC Converter With High-Voltage Gain for Fuel Cell Vehicles.

SiC/GaN power semiconductor devices: a theoretical comparison and experimental evaluation under different switching conditions (2017)
Journal Article
Li, K., Evans, P., & Johnson, M. (in press). SiC/GaN power semiconductor devices: a theoretical comparison and experimental evaluation under different switching conditions. IET Electrical Systems in Transportation, https://doi.org/10.1049/iet-est.2017.0022

The conduction and switching losses of SiC and GaN power transistors are compared in this paper. Voltage rating of commercial GaN power transistors is less than 650V while that of SiC power transistors is less than 1200V. The paper begins with a theo... Read More about SiC/GaN power semiconductor devices: a theoretical comparison and experimental evaluation under different switching conditions.

The Alternate Arm Converter (AAC) - "short-overlap" mode operation - analysis and design parameter selection (2017)
Journal Article
Farr, E., Feldman, R., Clare, J. C., Watson, A. J., & Wheeler, P. (2018). The Alternate Arm Converter (AAC) - "short-overlap" mode operation - analysis and design parameter selection. IEEE Transactions on Power Electronics, 33(7), 5641-5659. https://doi.org/10.1109/TPEL.2017.2742899

This paper presents converter operation principles and theoretical analyses for “short-overlap” mode operation of the Alternate Arm Converter (AAC), which is a type of modular multilevel Voltage Source Converter (VSC) that has been proposed for HVDC... Read More about The Alternate Arm Converter (AAC) - "short-overlap" mode operation - analysis and design parameter selection.