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Simplified Automatic Fault Detection in Wind Turbine Induction Generators (2020)
Journal Article
Brigham, K., Zappalá, D., Crabtree, C., & Donaghy-Spargo, C. (2020). Simplified Automatic Fault Detection in Wind Turbine Induction Generators. Wind Energy, 23(4), 1135-1144. https://doi.org/10.1002/we.2478

This paper presents a simplified automated fault detection scheme for wind turbine induction generators with rotor electrical asymmetries. Fault indicators developed in previous works have made use of the presence of significant spectral peaks in the... Read More about Simplified Automatic Fault Detection in Wind Turbine Induction Generators.

Validation of a non-contact technique for torque measurements in wind turbines using an enhanced transient FSV approach (2019)
Journal Article
Zhang, G., Zappalá, D., Crabtree, C., Donaghy-Spargo, C., Hogg, S., & Duffy, A. (2020). Validation of a non-contact technique for torque measurements in wind turbines using an enhanced transient FSV approach. Measurement, 151, Article 107261. https://doi.org/10.1016/j.measurement.2019.107261

In-service turbine monitoring is essential for maximizing the wind energy contribution to the global energy budget. Measurement of turbine shaft torque under transient wind conditions is fundamental to develop reliable condition monitoring techniques... Read More about Validation of a non-contact technique for torque measurements in wind turbines using an enhanced transient FSV approach.

Use of Fractional-Conductor Windings and Semi-Magnetic Slot Wedges in Synchronous Machines (2019)
Journal Article
Donaghy-Spargo, C., & Spargo, A. (2019). Use of Fractional-Conductor Windings and Semi-Magnetic Slot Wedges in Synchronous Machines. Journal of Engineering, 2019(17), 4396-4400. https://doi.org/10.1049/joe.2018.8205

This paper discusses two methods of altering the harmonic content of the spatial air-gap flux density waveform in synchronous machines (generators and motors). First, fractional-conductor windings are analysed for adoption as a replacement for a conv... Read More about Use of Fractional-Conductor Windings and Semi-Magnetic Slot Wedges in Synchronous Machines.

Transient Skin Effect in Power Electronic Applications (2019)
Journal Article
Donaghy-Spargo, C., & Horsfall, A. (2019). Transient Skin Effect in Power Electronic Applications. Journal of Engineering, 2019(17), 3696-3700. https://doi.org/10.1049/joe.2018.8132

This study describes transient electromagnetic phenomena in electrical conductors that are connected to modern power electronic circuits and therefore subjected to current controlled pulses with fast rise times and high peak current ratings. Electrom... Read More about Transient Skin Effect in Power Electronic Applications.

Evaluating Suitable Semiconducting Materials for Cryogenic Power Electronics (2019)
Journal Article
Bradley, L., Atkinson, G., Horsfall, A., & Donaghy-Spargo, C. (2019). Evaluating Suitable Semiconducting Materials for Cryogenic Power Electronics. Journal of Engineering, 2019(17), 4475-4479. https://doi.org/10.1049/joe.2018.8099

The interest in hybrid electric aircraft has invigorated research into superconducting power networks and superconducting electrical machines. Underpinning this is the ability to control the flow of electrical current at cryogenic temperatures, using... Read More about Evaluating Suitable Semiconducting Materials for Cryogenic Power Electronics.

Oliver Heaviside's Electromagnetic Theory (2018)
Journal Article
Donaghy-Spargo, C., & Yakovlev, A. (2018). Oliver Heaviside's Electromagnetic Theory. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 376(2134), Article 20180229. https://doi.org/10.1098/rsta.2018.0229

The year 2018 marks the 125th anniversary of the first of three published volumes on electromagnetic theory by the eminent Victorian electrical engineer, physicist and mathematician, Oliver Heaviside FRS. This commemorative issue of Philosophical Tra... Read More about Oliver Heaviside's Electromagnetic Theory.

On Heaviside’s Contributions to Transmission Line Theory: Waves, Diffusion and Energy Flux (2018)
Journal Article
Donaghy-Spargo, C. (2018). On Heaviside’s Contributions to Transmission Line Theory: Waves, Diffusion and Energy Flux. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 376(2134), Article 20170457. https://doi.org/10.1098/rsta.2017.0457

This paper surveys some selected contributions of Oliver Heaviside FRS (1850–1925) to classical electromagnetic theory and electrical engineering science. In particular, the paper focuses on his contributions to the development of electrical transmis... Read More about On Heaviside’s Contributions to Transmission Line Theory: Waves, Diffusion and Energy Flux.

On the Influence of Increased Stator Leakage Inductance in Single Tooth Wound Synchronous Reluctance Motors (2017)
Journal Article
Donaghy-Spargo, C., Mecrow, B., & Widmer, J. (2018). On the Influence of Increased Stator Leakage Inductance in Single Tooth Wound Synchronous Reluctance Motors. IEEE Transactions on Industrial Electronics, 65(6), 4475 -4482. https://doi.org/10.1109/tie.2017.2772180

This paper explores the leakage inductance of a single tooth wound synchronous reluctance motor and its influence on motor performance. It is shown that the stator leakage inductance heavily influences the true saliency ratio in synchronous reluctanc... Read More about On the Influence of Increased Stator Leakage Inductance in Single Tooth Wound Synchronous Reluctance Motors.