All Outputs (29)

Suspension Force-Coupling Analysis of Flux-Reversal Bearingless Slice Motor Based on Advanced Magnetic Field Model (2024)
Journal Article
Liu, J., Qu, R., Li, D., Kong, W., Zou, T., & Sun, X. (2024). Suspension Force-Coupling Analysis of Flux-Reversal Bearingless Slice Motor Based on Advanced Magnetic Field Model. IEEE Transactions on Transportation Electrification, 1-1. https://doi.org/10.1109/tte.2024.3370242

Flux-reversal bearingless slice motor with direct suspension current (DC-FRBLM) is a novel slice bearingless motor. The robust rotor structure of the DC-FRBLM brings benefits including high compactness and ease of manufacturing. However, the disparat... Read More about Suspension Force-Coupling Analysis of Flux-Reversal Bearingless Slice Motor Based on Advanced Magnetic Field Model.

Design and Controllability Trade-Off in Dual Three-Phase Winding PMSMs (2023)
Conference Proceeding
Zhu, S., Qayyum, N., Ernest, E., Paciura, K., Zou, T., & Gerada, C. (2023). Design and Controllability Trade-Off in Dual Three-Phase Winding PMSMs. In 2023 IEEE Energy Conversion Congress and Exposition (ECCE) (4147-4154). https://doi.org/10.1109/ecce53617.2023.10361990

Designing and controlling dual three-phase motor poses significant challenges. The conventional mathematical model of such motors only considers fundamental components, thereby failing to capture the complete characteristics of the motors. In this st... Read More about Design and Controllability Trade-Off in Dual Three-Phase Winding PMSMs.

Comparative Study on Stranded and Hairpin Windings for 350kW EV Traction Motor (2023)
Conference Proceeding
Jiang, J., Zou, T., Rocca, S. L., Gerada, D., & Gerada, C. (2023). Comparative Study on Stranded and Hairpin Windings for 350kW EV Traction Motor. In 2023 26th International Conference on Electrical Machines and Systems (ICEMS). https://doi.org/10.1109/icems59686.2023.10345248

Hairpin winding is a key technology for traction motors to meet the step-change requirements on power density and efficiency in electrical vehicle (EV) industry. This winding solution features inherently high slot fill factor and improved heat dissip... Read More about Comparative Study on Stranded and Hairpin Windings for 350kW EV Traction Motor.

Multi-objective Optimizations of Copper and Aluminum Hairpin Windings: a Comparison (2023)
Conference Proceeding
Cutuli, G., Nuzzo, S., Zou, T., Franceschini, G., Gerada, C., & Barater, D. (2023). Multi-objective Optimizations of Copper and Aluminum Hairpin Windings: a Comparison. In 2023 IEEE Energy Conversion Congress and Exposition (ECCE) (3796-3801). https://doi.org/10.1109/ecce53617.2023.10362293

This work critically analyzes the possibility of adopting aluminum hairpin windings as alternative to copper in electric traction machines for automotive applications. Copper and aluminum hairpin winding solutions are compared based on two proposed s... Read More about Multi-objective Optimizations of Copper and Aluminum Hairpin Windings: a Comparison.

Design of Hairpin Winding and Random Winding Stators for High Speed Heavy-Duty Traction Motor (2023)
Conference Proceeding
Jiang, J., Zou, T., La Rocca, A., La Rocca, S., Liu, C., Xu, Z., …Gerada, D. (2023). Design of Hairpin Winding and Random Winding Stators for High Speed Heavy-Duty Traction Motor. In 2023 IEEE Vehicle Power and Propulsion Conference (VPPC). https://doi.org/10.1109/VPPC60535.2023.10403273

Hairpin winding with rectangularly shaped conductors are gradually replacing random winding wound with stranded wires in electric vehicle (EV) industry. As the newgeneration winding technology, hairpin winding features high electromagnetic and therma... Read More about Design of Hairpin Winding and Random Winding Stators for High Speed Heavy-Duty Traction Motor.

A Computationally Efficient Semi-Analytical Method for Circulating Current Loss of High Speed Permanent Magnet Machines (2023)
Journal Article
Li, L., Fan, X., Liu, Z., Li, D., Zou, T., Chen, X., & Qu, R. (2024). A Computationally Efficient Semi-Analytical Method for Circulating Current Loss of High Speed Permanent Magnet Machines. IEEE Transactions on Energy Conversion, 39(1), 675-687. https://doi.org/10.1109/tec.2023.3312648

This article proposes a computationally efficient (CE) semi-analytical method for winding power loss calculation of high speed permanent magnet machines induced by circulating current. It combines a CE magnetostatic finite element method (FEM) for ra... Read More about A Computationally Efficient Semi-Analytical Method for Circulating Current Loss of High Speed Permanent Magnet Machines.

Synthesis of Consequent Pole Vernier Permanent Magnet Machine Based on Oscillating Magnetic Potential Difference Model (2023)
Journal Article
Fang, L., Zhang, Y., Li, D., & Zou, T. (2023). Synthesis of Consequent Pole Vernier Permanent Magnet Machine Based on Oscillating Magnetic Potential Difference Model. IEEE Transactions on Transportation Electrification, https://doi.org/10.1109/tte.2023.3301549

In recent years, consequent pole vernier permanent magnet machine (CPVPMM) has been found higher torque capability and less magnet usage compared to the surface-mounted counterpart i.e. SVPMM, thus attracting extensive interests. Meanwhile, the theor... Read More about Synthesis of Consequent Pole Vernier Permanent Magnet Machine Based on Oscillating Magnetic Potential Difference Model.

Additively Manufactured Winding Design for Thermal Improvement of an Oil-cooled Axial Flux Permanent Magnet Machine (2023)
Journal Article
Tan, H., Fan, X., Li, D., Zou, T., Kong, W., Wang, R., …Qu, R. (2023). Additively Manufactured Winding Design for Thermal Improvement of an Oil-cooled Axial Flux Permanent Magnet Machine. IEEE Transactions on Transportation Electrification, https://doi.org/10.1109/TTE.2023.3282213

This article proposes a new additively manufactured winding with integrated heat sinks to improve thermal performance of an oil-cooled yokeless and segmented armature (YASA) axial flux permanent magnet machines. The heat sinks featuring pin-fin struc... Read More about Additively Manufactured Winding Design for Thermal Improvement of an Oil-cooled Axial Flux Permanent Magnet Machine.

Torque Capacity Improvement of Flux-Switching PM Machines Based on Directional Stator Permeance Design (2023)
Journal Article
Chen, H., Li, D., Qu, R., & Zou, T. (2023). Torque Capacity Improvement of Flux-Switching PM Machines Based on Directional Stator Permeance Design. IEEE Transactions on Industrial Electronics, 1-10. https://doi.org/10.1109/tie.2023.3281712

As one type of flux modulation machines, flux-switching permanent magnet (FSPM) machines present high sensitivity to airgap structures. Therefore, both stator/rotor teeth and slot/pole combinations have significant influences on machine performance.... Read More about Torque Capacity Improvement of Flux-Switching PM Machines Based on Directional Stator Permeance Design.

Review and Future Developments of Wound Field Synchronous Motors in Automotive (2023)
Conference Proceeding
Petrelli, G., Nuzzo, S., Zou, T., Barater, D., Franceschini, G., & Gerada, C. (2023). Review and Future Developments of Wound Field Synchronous Motors in Automotive. In 2023 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles \& International Transportation Electrification Conference (ESARS-ITEC). https://doi.org/10.1109/esars-itec57127.2023.10114826

Electric motors are increasingly spreading in the automotive sector, following the progressive electrification of transportation aimed to reduce CO2 emissions and increase sustainability. Most of the employed motors are permanent magnets (PM) based a... Read More about Review and Future Developments of Wound Field Synchronous Motors in Automotive.

Design Trade-off Between Torque Density and Power Factor in Surface-Mounted PM Vernier Machines Through Closed-Form Per-Unit Equations (2023)
Journal Article
Zhao, Y., Li, D., Ren, X., Zou, T., & Qu, R. (2023). Design Trade-off Between Torque Density and Power Factor in Surface-Mounted PM Vernier Machines Through Closed-Form Per-Unit Equations. IEEE Transactions on Industry Applications, 59(3), 3265-3277. https://doi.org/10.1109/TIA.2023.3245586

Benefited from flux modulation effects, surface-mounted permanent magnet vernier machines (SPMVMs) present the high-torque low-speed properties, which can become the potential candidates for direct-drive applications. However, their power factor is i... Read More about Design Trade-off Between Torque Density and Power Factor in Surface-Mounted PM Vernier Machines Through Closed-Form Per-Unit Equations.

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., …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.

A Novel Airgap Permeance Modeling Approach for Magnetic Field Analysis of Electrical Machines Based on Electrostatic FEA (2022)
Conference Proceeding
Cui, M., Zou, T., Li, D., Gerada, D., Qu, R., & Gerada, C. (2022). A Novel Airgap Permeance Modeling Approach for Magnetic Field Analysis of Electrical Machines Based on Electrostatic FEA. In 2022 IEEE Transportation Electrification Conference and Expo, Asia-Pacific (ITEC Asia-Pacific). https://doi.org/10.1109/itecasia-pacific56316.2022.9941839

Detailed airgap permeance information is of great importance for analyzing the operation principle and optimizing the electromagnetic field distribution of an electric machine with unconventional topology. So far, analytical approaches upon calculati... Read More about A Novel Airgap Permeance Modeling Approach for Magnetic Field Analysis of Electrical Machines Based on Electrostatic FEA.

Comparison of Aluminium and Copper Conductors in Hairpin Winding Design for High Power Density Traction Motors (2022)
Conference Proceeding
Petrelli, G., Cui, M., Zou, T., Sala, G., La Rocca, A., Barater, D., …Gerada, C. (2022). Comparison of Aluminium and Copper Conductors in Hairpin Winding Design for High Power Density Traction Motors. In 2022 International Conference on Electrical Machines (ICEM) (1635-1641). https://doi.org/10.1109/icem51905.2022.9910796

Hairpin windings are becoming current/next generation solutions for traction motors of electric vehicles due to inherently reduced DC power losses and improved heat dissipation capability compared with random windings. Copper-based conductor has been... Read More about Comparison of Aluminium and Copper Conductors in Hairpin Winding Design for High Power Density Traction Motors.

Radial Force Analysis and Optimization of Interior Permanent Magnet Traction Motor for Reduction of Electromagnetic Vibration (2022)
Conference Proceeding
Li, H., Cui, M., Zou, T., Zhang, X., Zhang, H., Xu, Z., …Gerada, C. (2022). Radial Force Analysis and Optimization of Interior Permanent Magnet Traction Motor for Reduction of Electromagnetic Vibration. In 2022 International Conference on Electrical Machines (ICEM) (1906-1912). https://doi.org/10.1109/ICEM51905.2022.9910879

Interior permanent magnet (IPM) machines are subject to rich harmonics of air-gap magnetic field, which correspond to electromagnetic forces and resulting noise, vibration, and harshness (NVH) issues. In this paper, the NVH issue is evaluated based o... Read More about Radial Force Analysis and Optimization of Interior Permanent Magnet Traction Motor for Reduction of Electromagnetic Vibration.

Investigating Synchronous Reluctance Rotor Performance for Traction Applications against a Permanent Magnet Benchmark (2022)
Conference Proceeding
Connor, P. H., Khowja, M., La Rocca, A., La Rocca, S., Zou, T., Vakil, G., …Paciura, K. (2022). Investigating Synchronous Reluctance Rotor Performance for Traction Applications against a Permanent Magnet Benchmark. . https://doi.org/10.1109/icem51905.2022.9910649

This paper investigates the potential benefits for the use of synchronous reluctance machines for traction applications. Permanent magnet machines are often used to generate the highest power densities. However, magnet use has drawbacks including tem... Read More about Investigating Synchronous Reluctance Rotor Performance for Traction Applications against a Permanent Magnet Benchmark.

Performance Assessment of Standard Cooling Strategies for Hairpin Windings (2022)
Conference Proceeding
La Rocca, A., La Rocca, S., Zou, T., Liu, C., Moslemin, M., Gerada, C., & Cairns, A. (2022). Performance Assessment of Standard Cooling Strategies for Hairpin Windings. In 2022 International Conference on Electrical Machines (ICEM) (1163-1169). https://doi.org/10.1109/icem51905.2022.9910733

This paper aims to assess the performance of some standard cooling strategies which are commonly used in traction electric motors for electric vehicles (EVs) employing hairpin windings. The use of such type of coils does normally lead to higher power... Read More about Performance Assessment of Standard Cooling Strategies for Hairpin Windings.

Comparison of AC Losses in the Winding of Electrical Machines with Fixed Strands Positions, Fixed Conductor Shapes and Random Winding (2022)
Journal Article
Bardalai, A., Gerada, D., Zou, T., Degano, M., Zhang, C., & Gerada, C. (2022). Comparison of AC Losses in the Winding of Electrical Machines with Fixed Strands Positions, Fixed Conductor Shapes and Random Winding. Energies, 15(15), Article 5701. https://doi.org/10.3390/en15155701

In high performance electric machines, the increase of fundamental frequency leads to additional losses in the winding due to parasitic effects such as the associated skin and proximity effects. In the first part, this paper presents an investigation... Read More about Comparison of AC Losses in the Winding of Electrical Machines with Fixed Strands Positions, Fixed Conductor Shapes and Random Winding.

Convective Heat Transfer Characteristics on End-Winding of Stator Immersed Oil-Cooled Electrical Machines for Aerospace Applications (2022)
Journal Article
Wang, R., Fan, X., Li, D., Qu, R., Li, L., & Zou, T. (2022). Convective Heat Transfer Characteristics on End-Winding of Stator Immersed Oil-Cooled Electrical Machines for Aerospace Applications. IEEE Transactions on Transportation Electrification, 8(4), 4265-4278. https://doi.org/10.1109/tte.2022.3186800

The stator immersed oil cooling has emerged as a promising thermal management method for high power density electric machines applied in aerospace applications. However, due to the complex geometry of end-winding, the research on the convective heat... Read More about Convective Heat Transfer Characteristics on End-Winding of Stator Immersed Oil-Cooled Electrical Machines for Aerospace Applications.

A Comprehensive Design Guideline of Hairpin Windings for High Power Density Electric Vehicle Traction Motors (2022)
Journal Article
Zou, T., Gerada, D., La Rocca, A., Moslemin, M., Cairns, A., Cui, M., …Gerada, C. (2022). A Comprehensive Design Guideline of Hairpin Windings for High Power Density Electric Vehicle Traction Motors. IEEE Transactions on Transportation Electrification, 8(3), 3578-3593. https://doi.org/10.1109/TTE.2022.3149786

The rapidly increasing demand on power density levels of electric vehicle (EV) drive systems is pushing the boundaries of traction motor performance. Hairpin windings are becoming a popular option for EV motors due to their reduced DC losses and impr... Read More about A Comprehensive Design Guideline of Hairpin Windings for High Power Density Electric Vehicle Traction Motors.