All Outputs (169)

Investigation of AC Copper and Iron Losses in High-Speed High-Power Density PMSM (2018)
Conference Proceeding

This paper presents a detailed investigation of AC copper losses in high-speed high-power density permanent magnet synchronous machine. For parallel strands winding, it is not easy to accurately estimate the AC copper losses using finite element mode... Read More about Investigation of AC Copper and Iron Losses in High-Speed High-Power Density PMSM.

Electrical Machine Rotor Shielding for Low Cost Electrical Drive (2018)
Conference Proceeding

Electrical machine rotor shielding has been proposed for high-speed electrical machines, i.e. ≥50krpm, where a smooth current waveform becomes difficult and costly to generate due to the required high switching frequency. The rotor shielding is used... Read More about Electrical Machine Rotor Shielding for Low Cost Electrical Drive.

Mass Production Costing of Induction Machines for Automotive Applications (2018)
Conference Proceeding

Cost is one of the key parameters of electric machines designed for automotive applications. In order to keep manufacturing cost low, it is desirable to estimate the manufacturing cost of the machine in the early stages of the design process. For thi... Read More about Mass Production Costing of Induction Machines for Automotive Applications.

Design of an Integrated Inductor for 45kW Aerospace Starter-Generator (2018)
Conference Proceeding

A close physical and functional integration of passive components is required to make an efficient and power dense overall system. Such power dense systems are a prerequisite in aerospace and marine applications. This paper presents a design of an in... Read More about Design of an Integrated Inductor for 45kW Aerospace Starter-Generator.

Wide bandgap voltage source inverter design for automotive electric drivetrain (2018)
Conference Proceeding

In this paper a high power, high frequency voltage source inverter for automotive traction application is reviewed. The main objectives of the design process is the maximization of power density, while keeping high efficiency and low weight. In this... Read More about Wide bandgap voltage source inverter design for automotive electric drivetrain.

Design of a 43kW switched reluctance machine for a high performance hybrid electric vehicle (2018)
Conference Proceeding

A switched reluctance machine (SRM) is very robust and capable to perform well under harsh conditions. It is simple in construction and avoids the use of magnets so it is cheap to manufacture. The powertrain of a hybrid vehicle presents challenging c... Read More about Design of a 43kW switched reluctance machine for a high performance hybrid electric vehicle.

A Smart Transformer-Rectifier Unit for the More Electric Aircraft (2018)
Conference Proceeding

In the framework of the More Electric Aircraft (MEA), an efficient and flexible power distribution system is of paramount importance. Considering the presence of both AC and DC loads at multiple voltage levels, the distribution system of the most mod... Read More about A Smart Transformer-Rectifier Unit for the More Electric Aircraft.

Space Weather Prediction to Enhance the Reliability of the More Electric Aircraft (2018)
Conference Proceeding

Power devices manufacturers know that electronic devices are susceptible to radiation events. Galactic Cosmic Rays (GCR) coming from space can interact with the earth atmosphere, generating secondary particles (electrons, neutrons, protons) that can... Read More about Space Weather Prediction to Enhance the Reliability of the More Electric Aircraft.

Novel core designs to miniaturise passive magnetic components (2018)
Conference Proceeding

Converter sizes are often dominated by passive magnetic components. Passive magnetic component sizes are in turn limited by electromagnetic saturation and thermal limits. This paper covers two modifications to the air gaps of tape wound amorphous mag... Read More about Novel core designs to miniaturise passive magnetic components.

A novel 24-slots14-poles fractional-slot concentrated winding topology with low space harmonics for electrical machines (2018)
Conference Proceeding

This paper proposes a novel winding layout for the machines with fractional-slot concentrated windings (FSCW) using a stator shifting concept and non-overlapping windings, with which all the non-working harmonics will be completely cancelled or signi... Read More about A novel 24-slots14-poles fractional-slot concentrated winding topology with low space harmonics for electrical machines.

Fluid flow and heat transfer analysis of TEFC machine end regions using more realistic end-winding geometry (2018)
Conference Proceeding

In this paper a typical small low voltage TEFC motor (output power ~10 kW) has been studied using computational fluid dynamics. The complexity of the end winding geometries, often consisting of several insulated copper strands bound together, provide... Read More about Fluid flow and heat transfer analysis of TEFC machine end regions using more realistic end-winding geometry.

An advanced modulation scheme emphasising neutral point ripple suppression using predictive control for three-level NPC converters in aircraft electric starter generator applications (2018)
Conference Proceeding

Electrical starter/generator (ESG) system is one of the key innovations of more-electric aircraft initiative. The ESG cranks the engine and accelerates it up to self-sustained speed using electric energy (starter mode) and then runs as a generator to... Read More about An advanced modulation scheme emphasising neutral point ripple suppression using predictive control for three-level NPC converters in aircraft electric starter generator applications.

Numerical investigations of convective phenomena of oil impingement on end-windings (2018)
Conference Proceeding

A novel experimental rig for analysing intensive liquid cooling of highly power-dense electrical machine components has been developed. Coupled fluid flow and heat transfer has been modelled, using computational fluid dynamics (CFD), to inform the de... Read More about Numerical investigations of convective phenomena of oil impingement on end-windings.

Design and testing of electromechanical actuator for aerospace applications (2018)
Conference Proceeding

Electromechanical actuators are gaining interest in the aerospace industry within the More Electrical Aircraft (MEA) architecture. The end-goal of fully electric aircraft includes Electromechanical actuation for flight control systems. The design and... Read More about Design and testing of electromechanical actuator for aerospace applications.

Radial force control of Multi-Sector Permanent Magnet machines considering radial rotor displacement (2017)
Conference Proceeding

A mathematical model enabling to predict the electromagnetic x-y forces and torque for a given input current in a Multi-Sector Permanent Magnet Synchronous (MSPMS) machine is presented. The rotor static eccentricity is also accounted and the analytic... Read More about Radial force control of Multi-Sector Permanent Magnet machines considering radial rotor displacement.

Position control study of a bearingless multi-sector permanent magnet machine (2017)
Conference Proceeding

Bearingless motors combine in the same structure the characteristics of conventional motors and magnetic bearings. Traditional bearingless machines rely on two independent sets of winding for suspension force and torque production, respectively. The... Read More about Position control study of a bearingless multi-sector permanent magnet machine.

A semi-flooded cooling for a high speed machine: Concept, design and practice of an oil sleeve (2017)
Conference Proceeding

This paper proposes a semi-flooded cooling concept for a high speed machine design. The electrical machine considered is for an aircraft starter-generator system where power density and efficiency are crucial. In order to achieve the high power densi... Read More about A semi-flooded cooling for a high speed machine: Concept, design and practice of an oil sleeve.

A Novel Space Vector Modulation Technique For Three Level NPC Converters Within Aircraft Starter Generator Systems (2017)
Conference Proceeding

The neutral point voltage balancing issue for three level Neutral point clamped (NPC) converter has been extensively investigated recently. Different solutions to balance the neutral point have been proposed. However the proposed solutions so far eit... Read More about A Novel Space Vector Modulation Technique For Three Level NPC Converters Within Aircraft Starter Generator Systems.

Performance improvement of simplified synchronous generators using an active power filter (2017)
Conference Proceeding

Active power filters (APF) are used to improve power quality and are commonly connected in parallel with the load at the point of common coupling (PCC). They are used to compensate for harmonics from nonlinear loads, for reactive power compensation a... Read More about Performance improvement of simplified synchronous generators using an active power filter.

A system level comparison of drive topologies for high speed electrical machines (2017)
Conference Proceeding

This paper presents a comprehensive comparative study among five different converter topologies all designed to drive a 8.5kW-120krpm surface permanent magnet synchronous machine. The study aims at comparing the considered systems in terms of convert... Read More about A system level comparison of drive topologies for high speed electrical machines.