Professor DAVID GERADA's Outputs (77)

Design Optimization of Spoke-type Flux-intensifying PM Motor with Asymmetric Rotor Configuration for Improved Performance (2024)
Journal Article
Hsieh, M.-F., Huynh, A. T., Do, V.-V., Gerada, D., & Gerada, C. (2024). Design Optimization of Spoke-type Flux-intensifying PM Motor with Asymmetric Rotor Configuration for Improved Performance. IEEE Transactions on Magnetics, 60(9), Article 8203905. https://doi.org/10.1109/tmag.2024.3428416

This article explores enhancing spoke-type flux-intensifying permanent magnet (SFI-PM) motor performance by strategically placing flux barriers (FBs) in the asymmetric rotor. Integrating multi-FBs into the conventional spoke-type PM (CSPM) rotor topo... Read More about Design Optimization of Spoke-type Flux-intensifying PM Motor with Asymmetric Rotor Configuration for Improved Performance.

Mechanical properties and insulation damage of PMSG stator end windings with eccentricity considerations (2024)
Journal Article
Dai, D. R., He, Y. L., Xu, M. X., Zhang, W., Fu, Z. X., & Gerada, D. (2024). Mechanical properties and insulation damage of PMSG stator end windings with eccentricity considerations. Alexandria Engineering Journal, 105, 156-169. https://doi.org/10.1016/j.aej.2024.06.090

The mechanical properties and insulation damage of stator end windings in permanent magnet synchronous generator (PMSG) are investigated by theoretical analysis, finite element analysis (FEA) and experiment verification. First, a theoretical model of... Read More about Mechanical properties and insulation damage of PMSG stator end windings with eccentricity considerations.

Investigation on the torsional property of hybrid composite/metal shafts at different service temperatures: Experimental and analytical study (2024)
Journal Article
Qi, W., Xu, Z., Wan, Y., Gerada, D., & Gerada, C. (2024). Investigation on the torsional property of hybrid composite/metal shafts at different service temperatures: Experimental and analytical study. Polymer Composites, 45(12), 11266-11275. https://doi.org/10.1002/pc.28564

Torsional tests were conducted to investigate the influence of service temperature on torsional property of composite/steel hybrid structures. In the experiment, two types of lightweight hybrid composite‐metal shafts were tested at both room temperat... Read More about Investigation on the torsional property of hybrid composite/metal shafts at different service temperatures: Experimental and analytical study.

A Review of Carbon Emissions from Electrical Machine Materials (2024)
Journal Article
Zhang, X., Gerada, D., Xu, Z., Zhang, F., & Gerada, C. (2024). A Review of Carbon Emissions from Electrical Machine Materials. Electronics, 13(9), Article 1714. https://doi.org/10.3390/electronics13091714

As the world embarks on a global mission to tackle climate change, reducing carbon represents a key challenge given the escalating global warming. The U.K. is among many other nations that are determined to decarbonise all sectors and strive to achie... Read More about A Review of Carbon Emissions from Electrical Machine Materials.

Analysis of Proximity Loss of Electrical Machines Using Mesh-Based Magnetic Equivalent Circuit (2024)
Journal Article
Yuan, Y., Ahmadi Darmani, M., Bao, Y., Zhang, X., Gerada, D., & Zhang, H. (2024). Analysis of Proximity Loss of Electrical Machines Using Mesh-Based Magnetic Equivalent Circuit. IEEE Transactions on Transportation Electrification, 10(4), 9467-9477. https://doi.org/10.1109/TTE.2024.3383845

In high power density machines, proximity loss presents an unavoidable obstacle due to its significant impact on thermal dissipation and insulation aging. To address the need for rapid and accurate proximity loss prediction, this study presents a nov... Read More about Analysis of Proximity Loss of Electrical Machines Using Mesh-Based Magnetic Equivalent Circuit.

Fillet Radius Impact of Rectangular Insulated Wires on PDIV for Turn-to-Turn Insulation of Inverter-Fed Motors (2024)
Journal Article
Naderiallaf, H., Degano, M., Gerada, C., & Gerada, D. (2024). Fillet Radius Impact of Rectangular Insulated Wires on PDIV for Turn-to-Turn Insulation of Inverter-Fed Motors. IEEE Transactions on Dielectrics and Electrical Insulation, 31(4), 2084-2093. https://doi.org/10.1109/tdei.2024.3355032

This contribution elucidates the impact of the fillet radius, a geometric feature of rectangular insulated wires not commonly considered, on the partial discharge inception voltage (PDIV) in low-voltage machine turn-to-turn winding insulation. Initia... Read More about Fillet Radius Impact of Rectangular Insulated Wires on PDIV for Turn-to-Turn Insulation of Inverter-Fed Motors.

Experimental Simulation and Electromechanical Characterization of Dynamic Air Gap Eccentricity Faults in PMSG (2023)
Journal Article
He, Y., Dai, D., Xu, M., Zhang, W., Liu, X., Li, Y., Xing, Y., Zheng, W., & Gerada, D. (2023). Experimental Simulation and Electromechanical Characterization of Dynamic Air Gap Eccentricity Faults in PMSG. IEEJ Transactions on Electrical and Electronic Engineering, 18(12), 1903-1913. https://doi.org/10.1002/tee.23924

This paper presents a designed experimental simulation scheme for dynamic air gap eccentricity (DAGE) faults in permanent magnet synchronous generator (PMSG), along with the testing of their electromechanical characteristics. Unlike previous studies,... Read More about Experimental Simulation and Electromechanical Characterization of Dynamic Air Gap Eccentricity Faults in PMSG.

Analysis on Rotor Vibration Characteristics under Dynamic Rotor Interturn Short Circuit Fault in Synchronous Generators (2023)
Journal Article
He, Y., Jiang, M., Sun, K., Qiu, M., & Gerada, D. (2023). Analysis on Rotor Vibration Characteristics under Dynamic Rotor Interturn Short Circuit Fault in Synchronous Generators. Energies, 16(18), Article 6585. https://doi.org/10.3390/en16186585

A dynamic rotor interturn short circuit fault may occur during synchronous generator operation. However, there is no method to analyze the generator’s characteristics under the dynamic rotor interturn short circuit fault and identify the fault. In or... Read More about Analysis on Rotor Vibration Characteristics under Dynamic Rotor Interturn Short Circuit Fault in Synchronous Generators.

Research on the Effect of Heat Pipe Inclination Angle on Temperature Distribution in Electrical Machines (2023)
Journal Article
Zhao, H., Zhang, X., Li, J., Zhang, F., Zhang, Y., Yan, H., Zhu, X., Niu, Z., & Gerada, D. (2023). Research on the Effect of Heat Pipe Inclination Angle on Temperature Distribution in Electrical Machines. IEEE Transactions on Industry Applications, 59(6), 6745-6755. https://doi.org/10.1109/tia.2023.3310977

Due to high equivalent thermal conductivity with lightweight and small size, heat pipes (HPs) are being extensively applied in the motor cooling system to improve its thermal performance. However, when practically installed in electrical machines, th... Read More about Research on the Effect of Heat Pipe Inclination Angle on Temperature Distribution in Electrical Machines.

Parameter study for oil spray cooling on endwindings of electric machines via Eulerian–Lagrangian simulation (2023)
Journal Article
Zhao, A., Duwig, C., Liu, C., Gerada, D., & Leksell, M. (2023). Parameter study for oil spray cooling on endwindings of electric machines via Eulerian–Lagrangian simulation. Applied Thermal Engineering, 235, Article 121281. https://doi.org/10.1016/j.applthermaleng.2023.121281

The demand for larger power density and torque for the power traction motors used in electrified transportation puts forward a requirement for better thermal management methods. Spray cooling is a promising direct liquid cooling technique that has be... Read More about Parameter study for oil spray cooling on endwindings of electric machines via Eulerian–Lagrangian simulation.

Effectiveness of Thermal Interface Materials on Electrical Machines Thermal Performance with Heat Pipes (2023)
Journal Article
Zhao, H., Zhang, X., Li, J., Zhang, F., Zhao, W., Zhang, Y., Gerada, D., & Zhang, H. (2024). Effectiveness of Thermal Interface Materials on Electrical Machines Thermal Performance with Heat Pipes. IEEE Transactions on Transportation Electrification, 10(1), 1274-1285. https://doi.org/10.1109/TTE.2023.3274554

Thermal issue has always been a major concern in motor design. Heat pipes (HPs) have been applied in electrical machines with remarkable cooling effects reported. However, critical factors that affect HP thermal benefits have rarely been studied, suc... Read More about Effectiveness of Thermal Interface Materials on Electrical Machines Thermal Performance with Heat Pipes.

Analytical Calculation and Experimental Validation of Litz Wires Axial Thermal Conductivity (2023)
Journal Article
Li, Z., Xu, Z., Zhang, F., Gerada, D., Guo, R., Zhang, H., Corfield, M., Gerada, C., & Zhang, C. (2024). Analytical Calculation and Experimental Validation of Litz Wires Axial Thermal Conductivity. IEEE Transactions on Transportation Electrification, 10(1), 1167-1179. https://doi.org/10.1109/TTE.2023.3262766

Litz wires are widely used in electrical machines with reduced AC losses, compared to traditional random winding. The reduced AC losses can improve both electrical machines electromagnetic performance, such as efficiency and thermal performance. Ther... Read More about Analytical Calculation and Experimental Validation of Litz Wires Axial Thermal Conductivity.

Heat Pipe Bending Effect on Cooling Effectiveness in Electrical Machines (2023)
Journal Article
Zhao, H., Zhang, X., Li, J., Wang, H., Zhang, F., Zhang, H., Zhu, X., & Gerada, D. (2023). Heat Pipe Bending Effect on Cooling Effectiveness in Electrical Machines. IEEE Transactions on Energy Conversion, 38(3), 2011-2021. https://doi.org/10.1109/tec.2023.3249971

Heat pipes(HPs) are being extensively explored in motor cooling scenarios for enhanced cooling capacity. HPs are commonly bent to adapt to the compact structure of electrical machines, whereas the bending effect on motor cooling effectiveness still r... Read More about Heat Pipe Bending Effect on Cooling Effectiveness in Electrical Machines.

Experimental Investigation of Heat Pipe Inclination Angle Effect on Temperature Nonuniformity in Electrical Machines (2022)
Journal Article
Zhang, X., Zhao, H., Li, J., Zhang, F., Zhang, Y., Yan, H., Niu, Z., Gerada, D., & Zhang, H. (2023). Experimental Investigation of Heat Pipe Inclination Angle Effect on Temperature Nonuniformity in Electrical Machines. Energies, 16(1), Article 350. https://doi.org/10.3390/en16010350

Heat pipes (HPs) are gaining increasing popularity in the propulsion motors of transportation electrification due to their remarkable thermal properties. However, the inclination angle affects the HP thermal performance and, thus, results in temperat... Read More about Experimental Investigation of Heat Pipe Inclination Angle Effect on Temperature Nonuniformity in Electrical Machines.

Analysis of Stator Vibration Characteristics in Synchronous Generators Considering Inclined Static Air Gap Eccentricity (2022)
Journal Article
He, Y. L., Li, Y., Zhang, W., Xu, M. X., Bai, Y. F., Wang, X. L., Shi, S. Z., & Gerada, D. (2023). Analysis of Stator Vibration Characteristics in Synchronous Generators Considering Inclined Static Air Gap Eccentricity. IEEE Access, 2023(11), 7794-7807. https://doi.org/10.1109/ACCESS.2022.3230907

This paper mainly focuses on the impact of inclined static air gap eccentricity (ISAGE) on the electromagnetic characteristics and mechanical performances (vibration, deformation, strain and stress). Considering different ISAGE fault types in the the... Read More about Analysis of Stator Vibration Characteristics in Synchronous Generators Considering Inclined Static Air Gap Eccentricity.

Design procedure and optimisation methodology of permanent magnet synchronous machines with direct slot cooling for aviation electrification (2022)
Journal Article
Tameemi, A., Degano, M., Murataliyev, M., Di Nardo, M., Valente, G., Gerada, D., Xu, Z., & Gerada, C. (2023). Design procedure and optimisation methodology of permanent magnet synchronous machines with direct slot cooling for aviation electrification. IET Electric Power Applications, 17(4), 421-561. https://doi.org/10.1049/elp2.12281

Electric machines are widely employed in a variety of sectors, including automotive and aerospace industry. With the rising trend towards electrification in aviation, electric machines with increased power density and efficiency are becoming key enab... Read More about Design procedure and optimisation methodology of permanent magnet synchronous machines with direct slot cooling for aviation electrification.

Impact of stator interturn short circuit fault on shaft voltage in a synchronous generator (2022)
Journal Article
He, Y., Yang, P., Sun, K., Xu, Z., Wang, H., He, X., & Gerada, D. (2023). Impact of stator interturn short circuit fault on shaft voltage in a synchronous generator. IET Electric Power Applications, 17(3), 381-391. https://doi.org/10.1049/elp2.12271

Shaft voltage often exists in synchronous generators due to the assembly error or various faults after the long‐term performance. The article investigates the shaft voltage characteristic under the stator interturn short circuit (SISC) condition. Dif... Read More about Impact of stator interturn short circuit fault on shaft voltage in a synchronous generator.

Airgap Length Analysis of a 350kW PM-Assisted Syn-Rel Machine for Heavy Duty EV Traction (2022)
Journal Article
Zou, T., Gerada, D., La Rocca, S., La Rocca, A., Walker, A., Vakil, G., Arevalo, . S. L., Xu, Z., Cui, M., Bardalai, A., Wang, M., Kumar, R. M. R., Marfoli, A., Paciura, . K., Barden, R., Ernest, E., Zhu, . S., Qayyum, N., McQueen, A., Zhang, F., & Gerada, C. (2023). Airgap Length Analysis of a 350kW PM-Assisted Syn-Rel Machine for Heavy Duty EV Traction. IEEE Transactions on Industry Applications, 59(2), 1557-1570. https://doi.org/10.1109/TIA.2022.3225255

Synchronous reluctance (Syn-Rel) machines with embedded permanent magnets (PMs) are research hotspots in variable speed motor drives due to their robust rotor structure and wide constant power speed range (CPSR). In this paper, the potential of PM-as... Read More about Airgap Length Analysis of a 350kW PM-Assisted Syn-Rel Machine for Heavy Duty EV Traction.

Stator current identification in generator among single and composite faults composed by static air‐gap eccentricity and rotor inter‐turn short circuit (2022)
Journal Article
He, Y., Qiu, M., Jiang, M., Zhou, F., Gerada, D., Zhang, X., & Du, X. (2023). Stator current identification in generator among single and composite faults composed by static air‐gap eccentricity and rotor inter‐turn short circuit. IET Electric Power Applications, 17(2), 268-278. https://doi.org/10.1049/elp2.12260

In this study, a fault diagnosis model based on magnetic density is proposed to analyse the current characteristics of synchronous generator rotor inter‐turn short circuit and air gap eccentric single fault and composite fault. The model considers th... Read More about Stator current identification in generator among single and composite faults composed by static air‐gap eccentricity and rotor inter‐turn short circuit.

2-DOF Decoupled Discrete Current Control for AC Drives at Low Sampling-to-Fundamental Frequency Ratios (2022)
Journal Article
Wang, M., Buticchi, G., Li, J., Gu, C., Gerada, D., Degano, M., Xu, L., Li, Y., Zhang, H., & Gerada, C. (2023). 2-DOF Decoupled Discrete Current Control for AC Drives at Low Sampling-to-Fundamental Frequency Ratios. IEEE Transactions on Transportation Electrification, 9(2), 2048-2058. https://doi.org/10.1109/TTE.2022.3210909

In high performance drive systems, wide bandwidth and reference tracking accuracy of current control loop are fundamental requirements. The conventional PI controller provides robustness against the machine parameter mismatching and zero steady-state... Read More about 2-DOF Decoupled Discrete Current Control for AC Drives at Low Sampling-to-Fundamental Frequency Ratios.