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Application of direct drive wheel motor for fuel cell electric and hybrid electric vehicle propulsion system

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TLDR
In this paper, a gearless wheel motor drive system specifically designed for fuel cell electric and hybrid electric vehicle propulsion application is presented, which includes a liquid-cooled axial flux permanent-magnet machine designed to meet the direct drive requirements.
Abstract
This paper presents a gearless wheel motor drive system specifically designed for fuel cell electric and hybrid electric vehicle propulsion application. The system includes a liquid-cooled axial flux permanent-magnet machine designed to meet the direct-drive requirements. The machine design implements techniques to increase the machine inductance in order to improve machine constant power range and high-speed efficiency. The implemented technique reduces machine spin loss to further improve efficiency. The machine design also optimizes the placement of magnets in the rotor to reduce cogging and ripple torque. An original cooling system arrangement based on the use of high thermal conductivity epoxy joining machine stator and liquid-cooled aluminum casing allows the very effective removal of machine power loss. Design details and experimental results are presented

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Journal ArticleDOI

Power Electronics and Motor Drives Recent Progress and Perspective

TL;DR: The importance of power electronics, the recent advances of power semiconductor devices, converters, variable-frequency AC drives, and advanced control and estimation techniques will be reviewed briefly.
Journal ArticleDOI

Global Energy Scenario and Impact of Power Electronics in 21st Century

TL;DR: The global energy scenario, climate change problems, and the methods of their mitigation are discussed and the impact of power electronics in energy saving, renewable energy systems, bulk energy storage, and electric/hybrid vehicles is discussed.
Journal ArticleDOI

Beyond induction motors — Technology trends to move up efficiency

TL;DR: In this paper, the efficiency analysis on the best available electric motors and emerging motor technologies, such as axial-flux permanent-magnet synchronous motors, is presented, as well as a study on the theoretical efficiency limit achievable taking into account those existing design options.
Journal ArticleDOI

DC–AC Cascaded H-Bridge Multilevel Boost Inverter With No Inductors for Electric/Hybrid Electric Vehicle Applications

TL;DR: Experiments show that the proposed dc-ac cascaded H-bridge multilevel boost inverter can output a boosted ac voltage without the use of inductors.
Journal ArticleDOI

Recent Advances in Axial-Flux Permanent-Magnet Machine Technology

TL;DR: In this paper, the progress that has been made in the analysis and design of axial-flux permanent-magnet machines over the past decade, with particular attention to aspects such as electromagnetic and thermal modeling, materials, manufacturing, pulsating torque, and extended speed range, is reviewed.
References
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Journal ArticleDOI

A comparison of power density for axial flux machines based on general purpose sizing equations

TL;DR: In this paper, a general approach is presented to develop and to interpret the sizing and power density equations for axial flux machines with various topologies, different waveforms of back EMF and current.
Journal ArticleDOI

Identification of machine parameters of a synchronous motor

TL;DR: In this paper, the authors presented a method for estimating the machine parameters of a synchronous motor, both the interior and surface-mount types, and compared the results with the finite element and the experimental results to demonstrate the effectiveness of the presented method.
Proceedings ArticleDOI

Design and construction of a wheel-directly-coupled axial-flux PM motor prototype for EVs

TL;DR: In this paper, a 16 poles axial-flux PM motor prototype was used in the propulsion drive of an electrical scooter, which has 45 Nm peak torque, 6.8 kg active materials weight and is coupled directly to the scooter rear wheel.
Journal ArticleDOI

Multi-stage axial-flux PM machine for wheel direct drive

TL;DR: In this paper, a water-cooled axial-flux permanent magnet machine (AFPM) with a multi-stage structure and a water duct was proposed for direct-drive wheel motors.
Journal ArticleDOI

Performance of coreless-winding axial-flux permanent-magnet generator with power output at 400 Hz-3000 rev/min

TL;DR: An axial-flux permanent magnet machine (AFPM) topology with a coreless winding is proposed for generator units required aboard ships, aircraft or hybrid-electric vehicles as mentioned in this paper.
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