All Outputs (345)

A Review of Carbon Emissions from Electrical Machine Materials (2024)
Journal Article

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.

Permanent Magnet Assisted Synchronous Reluctance Machine Design for Light Traction Applications (2024)
Journal Article

This paper presents a systematic comparative design study of permanent magnet assisted synchronous reluctance (PMaSyR) machines for a light traction application aimed at considering an holistic approach for a given outer envelope and cooling system s... Read More about Permanent Magnet Assisted Synchronous Reluctance Machine Design for Light Traction Applications.

Life Characterization of PEEK and Nanofilled Enamel Insulated Wires Under Thermal Ageing (2024)
Journal Article

This paper characterizes and develops life models for two different wire insulating materials: Poly-ether-ketone (PEEK) and nanofilled enamel (Allotherm wire). The article focuses on predicting the lifespan of PEEK and Allotherm wire insulating mater... Read More about Life Characterization of PEEK and Nanofilled Enamel Insulated Wires Under Thermal Ageing.

Fillet Radius Impact of Rectangular Insulated Wires on PDIV for Turn-to-Turn Insulation of Inverter-Fed Motors (2024)
Journal Article

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.

Reduced Computational Burden of Modulated Model-Predictive Control for Synchronous Reluctance Motor Drive Applications (2023)
Conference Proceeding

This paper introduces a novel geometric approach to significantly reduce the computational burden of modulated predictive controllers while maintaining the same steady-state performance and satisfactory dynamic behavior. The proposed geometric method... Read More about Reduced Computational Burden of Modulated Model-Predictive Control for Synchronous Reluctance Motor Drive Applications.

Design and Controllability Trade-Off in Dual Three-Phase Winding PMSMs (2023)
Conference Proceeding

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.

Manufacturable Edgewise Winding Solutions Considering Parallel Slot and Parallel Tooth Stator Structures (2023)
Conference Proceeding

Due to climate concerns, the push towards transportation electrification to deliver electric machines capable of high-power density performance is becoming increasingly critical. A key component of this is the structure and manufacture of the winding... Read More about Manufacturable Edgewise Winding Solutions Considering Parallel Slot and Parallel Tooth Stator Structures.

Novel End-Winding Hybrid Flux Machine (2023)
Journal Article

This paper presents a novel motor topology, called the End-Winding Flux Machine (EWM), which explores the potential function of end-windings in rotating electric machines. By introducing an axial-radial flux stator into the end-windings, a hybrid flu... Read More about Novel End-Winding Hybrid Flux Machine.

A Taguchi-LHS-RSM Double-Staged Approach for Design Optimization of Self-Ventilated Cooling Systems Utilized in PMSMs (2023)
Conference Proceeding

Thermal management is critical for high-power-density permanent magnet synchronous machines (PMSMs). To realize the efficient and effective design optimization of self-ventilated air cooling systems for PMSMs, in this paper, a Taguchi-preconditioned... Read More about A Taguchi-LHS-RSM Double-Staged Approach for Design Optimization of Self-Ventilated Cooling Systems Utilized in PMSMs.

Comparative Study on Stranded and Hairpin Windings for 350kW EV Traction Motor (2023)
Conference Proceeding

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

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

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.

Experimental analysis of mismatch in electro-thermal device parameter within parallel connected SiC MOSFETs: Considerations for multi-chip power module design (2023)
Conference Proceeding

This paper aims to investigate the current imbalance within parallel connected common-source configuration of SiC Power MOSFET switches using double pulse transient operation. Mismatches in electro-thermal parameters e.g., threshold voltage (Vth and... Read More about Experimental analysis of mismatch in electro-thermal device parameter within parallel connected SiC MOSFETs: Considerations for multi-chip power module design.

Assessment of Edgewise Insulated Wire Bend Radius Impact on Dielectric Properties of Turn-to-Turn Insulation through Thermal Ageing (2023)
Journal Article

This study aims to evaluate the impact of the bending radius of edgewise insulated wires on dielectric properties such as partial discharge inception voltage (PDIV), partial discharge extinction voltage (PDEV), dielectric dissipation factor (DDF), an... Read More about Assessment of Edgewise Insulated Wire Bend Radius Impact on Dielectric Properties of Turn-to-Turn Insulation through Thermal Ageing.

PDIV Modelling for Rectangular Wire Turn-to-Turn Insulation of Inverter-Fed Motors through Thermal Ageing (2023)
Journal Article

This contribution develops the partial discharge inception voltage (PDIV)-FEM-based model based on Schumann’s streamer inception criterion (SCSIC) with respect to thermal ageing time (TAGT) or the insulation lifetime for the turn-to-turn insulation o... Read More about PDIV Modelling for Rectangular Wire Turn-to-Turn Insulation of Inverter-Fed Motors through Thermal Ageing.

Rotor Vibration Control using Multi-Three-Phase Permanent Magnet Synchronous Machines (2023)
Conference Proceeding

This paper investigates the possibility to control the radial displacements of the shaft of an electrical machine equipped with a multi-three-phase winding arrangement with the aim of reducing the related vibrations. A comprehensive dynamic modeling... Read More about Rotor Vibration Control using Multi-Three-Phase Permanent Magnet Synchronous Machines.

Comparison of V-shaped IPM Machines Winding Topologies for Heavy-duty EV Applications (2023)
Conference Proceeding

High performance electric machines are critical for heavy-duty electric vehicles (HDEV) to enable transportation electrification, where there is a significant performance gap between the traditional internal combustion engines and electrical machine... Read More about Comparison of V-shaped IPM Machines Winding Topologies for Heavy-duty EV Applications.

Design of an aircraft generator with radial force control. (2023)
Journal Article

With the increasing electrical energy demands in aviation propulsion systems, the increase in the onboard generators’ power density is inevitable. During the flight, forces coming from the gearbox or gyroscopic forces generated by flight manoeuvres l... Read More about Design of an aircraft generator with radial force control..

Review and Future Developments of Wound Field Synchronous Motors in Automotive (2023)
Conference Proceeding

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.

Analytical Calculation and Experimental Validation of Litz Wires Axial Thermal Conductivity (2023)
Journal Article

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.