All Outputs (66)

Active noise control by means of high frequency injection in electric motors (2024)
Journal Article

Machine acoustics is an important area of research impacting the quality and comfort of human life. With increased levels of electrification and the wider use of electric motors, the contribution of motor drives towards quieter acoustic systems becom... Read More about Active noise control by means of high frequency injection in electric motors.

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.

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.

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.

Airgap Length Analysis of a 350kW PM-Assisted Syn-Rel Machine for Heavy Duty EV Traction (2022)
Journal Article

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.

Cooling System Sizing using LPTN Analysis and Multiphysics Modelling for an Axial Flux Machine and Integrated Drive (2022)
Conference Proceeding

In this paper a Lumped Parameter Thermal Network (LPTN) is proposed for a Yokeless and Segmented Armature (YASA) axial flux permanent magnet (AFPM) machine. A simulation model is used to examine the machine in isolation, with an Integrated Motor Driv... Read More about Cooling System Sizing using LPTN Analysis and Multiphysics Modelling for an Axial Flux Machine and Integrated Drive.

Comparative Analysis of Synchronous Reluctance Machine against Conventional Induction Machine for Railway Traction (2022)
Conference Proceeding

Electrification in railway industry offers better performing trains with reduced pollution and maximised capacity. SynREL is gaining more interest as a candidate for traction application in place of IM due to its simple and robust structure. Conseque... Read More about Comparative Analysis of Synchronous Reluctance Machine against Conventional Induction Machine for Railway Traction.

Fast Sizing Tool and Optimization Technique for Concentrated Wound Slotless Outer Rotor Motor for eVTOL Application (2022)
Conference Proceeding

This paper aims to present the feasibility and advantages of slotless motors for electric aircraft applications. Currently, eVTOL (electric vertical takeoff and landing) aircraft are equipped with a slotted motor with concentrated windings and an out... Read More about Fast Sizing Tool and Optimization Technique for Concentrated Wound Slotless Outer Rotor Motor for eVTOL Application.

Investigating Synchronous Reluctance Rotor Performance for Traction Applications against a Permanent Magnet Benchmark (2022)
Conference Proceeding

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.

Modifications to PM-assisted Synchronous Reluctance Machine to Achieve Rare-Earth Free Heavy-duty Traction (2022)
Journal Article

Automotive applications require electrical machines designed for high torque density, wide speed range, and low cost. NdFeB magnets can achieve a high torque density and wide speed range, and however, they have a high cost. Therefore, this article ex... Read More about Modifications to PM-assisted Synchronous Reluctance Machine to Achieve Rare-Earth Free Heavy-duty Traction.

Analytical Model for the Open Circuit Field due to Different Magnetization Patterns of the rotor in the Slotless Machines (2022)
Conference Proceeding

From the existing literature, the open circuit field due to different magnetisations of the rotor magnets is known. This includes field due to parallel, radial and Halbach magnetisation. This paper presents the generalised analytical model to represe... Read More about Analytical Model for the Open Circuit Field due to Different Magnetization Patterns of the rotor in the Slotless Machines.

Mild hybridisation of turboprop engine with high-power-density integrated electric drives (2022)
Journal Article

This paper shares with the aerospace community a case study of turboprop mild hybridisation using a recently developed integrated drive system in the University of Nottingham, UK, within the ACHIEVE project under EU H2020 CleanSky 2 program (project... Read More about Mild hybridisation of turboprop engine with high-power-density integrated electric drives.

Impact of Stator Segmentation on the Performance of Aerospace Propulsion Machines (2022)
Journal Article

Electric machines offering a high power density are required for aerospace applications. Soft magnetic material with a high saturation flux density is one of the key component which is required to realize these power density targets. The need for a h... Read More about Impact of Stator Segmentation on the Performance of Aerospace Propulsion Machines.

Torque Limiters for Aerospace Actuator Application (2022)
Journal Article

Safety and reliability of electrical actuators are essential for success of all electric and more electric aircrafts (MEA). Torque limiters improve the reliability of electromechanical actuators (EMA) by restricting the amount of force experienced by... Read More about Torque Limiters for Aerospace Actuator Application.

Review on the Traditional and Integrated Passives: State-of-the-Art Design and Technologies (2021)
Journal Article

With the increased necessity of a high power density and efficient system in aerospace and marine industries, integrated motor drives provide an excellent solution in the modern era. Therefore, a close structural and functional integration of passive... Read More about Review on the Traditional and Integrated Passives: State-of-the-Art Design and Technologies.

How non-conventional machining affects the surface integrity and magnetic properties of non-oriented electrical steel (2021)
Journal Article

Non-oriented electrical steel (NOES) laminations are commonly used to manufacture the rotor and stator core of electric machines. To achieve high machine efficiencies, it is desirable for these NOES laminations to be able to achieve a high saturation... Read More about How non-conventional machining affects the surface integrity and magnetic properties of non-oriented electrical steel.

Integrated motor drive: Mass and volume optimization of the motor with an integrated filter inductor (2021)
Journal Article

The present trend of aerospace industries is being shifted towards a “More Electric Aircraft” system which needs to be high power dense. For this purpose, the integration technologies have gained massive interest, providing the benefits of reduced lo... Read More about Integrated motor drive: Mass and volume optimization of the motor with an integrated filter inductor.

Hybrid sensorless motor control in aerospace applications, a survey in sensorless control, optimizing for availability and acoustic noise (2021)
Conference Proceeding

A wide range of aerospace applications previously based on hydraulics including the control of aerodynamic surfaces are being actively replaced by lighter, more intelligent Motor Drive Electronics (MDEs). However, motor resolvers commonly used to pro... Read More about Hybrid sensorless motor control in aerospace applications, a survey in sensorless control, optimizing for availability and acoustic noise.

Improving the Saliency of a High Speed SynRel Rotor by using High Strength Martensitic Sleeve (2021)
Conference Proceeding

High strength magnetic steel laminations are the invariable choice to achieve the power density demands of high speed electric machines required in the automotive industry. However, the cost competitive automobile market, favours the use of conventio... Read More about Improving the Saliency of a High Speed SynRel Rotor by using High Strength Martensitic Sleeve.

Lifetime Estimation of Enameled Wires Under Accelerated Thermal Aging Using Curve Fitting Methods (2021)
Journal Article

Estimating the lifetime of enameled wires using the conventional/standard test method requires a significant amount of time that can endure up to thousands of testing hours, which could considerably delay the time-to-market of a new product. This pap... Read More about Lifetime Estimation of Enameled Wires Under Accelerated Thermal Aging Using Curve Fitting Methods.