Feasibility and electromagnetic design of direct drive wheel actuator for green taxiing

Raminosoa, Tsarafidy; Hamiti, Tahar; Galea, Michael; Gerada, Chris

doi:10.1109/ecce.2011.6064145

Cited by 39 publications

(47 citation statements)

References 7 publications

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“…The motor, which is presented in detail in [12] is a 36 slot, 42 pole machine with an open slot configuration in order to achieve better thermal performances through the enhancement of the slot fill factor K fill . The machine is designed for the aerospace application mentioned above and presented in [3,12]. Some of the more important specifications of this model are listed in Table I, where I pk is the peak of the current required per phase for the peak load condition, t pk is the torque achieved during peak load condition, l ax is the axial length of the machine and T amb is the ambient temperature.…”

Section: Validation With Fe Analysismentioning

confidence: 99%

“…Their torque/force density capabilities [2,3] and the fault tolerance performances [4,5] the economic burden related to magnet material, other disadvantages concerning such machines are the always present no-load flux, the natural intolerance towards high temperatures [6] and the risk of irreversible demagnetisation.…”

Section: Introductionmentioning

confidence: 99%

“…For transient problems with a large number of steps, then this technique represents a considerable advantage in terms of reducing computational time. As vessel to test and investigate this technique, a high torque density, aerospace, traction motor [3,12] is used. The machine is an outer rotor, Halbach-equipped, PM motor, capable of a peak torque t pk of 7kNm at a current density J pk of 38A/mm 2 .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Demagnetization Analysis for Halbach Array Configurations in Electrical Machines

et al. 2015

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-This paper proposes and investigates an analytical method for assessing the risk of potential, irreversible demagnetisation in the PMs of electrical machines, equipped with n-stages, Halbach arrays. The higher risk of demagnetisation, synonymous with Halbach arrays imposes that the method be both load and temperature dependant. In fact, the proposed method studies the magnetic field distribution in the air-gap and PM region, for various operating temperatures and expresses these fields as analytical expressions for the no-load and peak load conditions. The model can cater for Halbach arrays with up to n stages, thus making it a versatile tool that can be utilised for various Halbach configurations. Finite element analysis is used to validate the method.The analytical tool is then used for the design and analysis of a high torque density, outer rotor, traction motor. The motor is for an aerospace application and its operating duty cycle imposes very high, short time, peak load conditions at elevated temperatures, posing an elevated risk of irreversible, PM demagnetisation. The model is used to investigate various Halbach configurations for this application, in order to reduce the demagnetisation risk and also improve the general performance of the machine. The analytical method thus provides a computationally efficient tool that can be used to predict and prevent demagnetisation in Halbach-equipped, electrical machines operating in harsh environments such as the aerospace sector.

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Section: Validation With Fe Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Demagnetization Analysis for Halbach Array Configurations in Electrical Machines

et al. 2015

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“…While each of these electric motors has assisted in reducing fuel oil intake, emission of hazardous gas remains worrisome [16][17]. As a viable solution for complete elimination of the complex combustion engine with fuel oil together, high torque electric motor is crucially necessary due to economic imperatives.…”

Section: Introductionmentioning

confidence: 99%

A High Torque Segmented Outer Rotor Permanent Magnet Flux Switching Motor for Motorcycle Propulsion

Mbadiwe

Sulaiman

Zarafi

2018

MATEC Web of Conferences

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Abstract. Electric scooters also known as electric motorcycle are viable and personal means of road transportation have been making their ways into the world markets now because in them, combustion engine with the use of fuel oil for propulsion have been completely eliminated for economic and environmental imperatives. Electric motor which converts electrical energy into mechanical energy is used to overcome the complication of combustion engine. As it is, everyone is opting for combustion engine free and fuel-less type of vehicle. For this reason, manufacturers have exhibited interest, making research on electric motor very attractive. Meanwhile, surface permanent magnet synchronous motor (SPMSM) has been successfully developed having output torque of 110 Nm, the assembly of motor lacked mechanical strength between the rotor yoke and the mounted permanent magnet (PM) which heats up during speed operation, resulting to poor performance. To overcome the challenges laced with SPMSM, this paper presents a novel design of 24 stator 14 pole outer rotor-permanent magnet flux switching motor (SOR-PMFSM) capable of high torque and high performance. It employs an unconventional segmented rotor which has short flux path flow. It also embraces alternate stator tooth windings to reduce material cost. Design specifications and restriction with input DC current are the same with SPMSM. The 2D-FEA by JMAG, version 14 is used to examine the performance of the proposed motor in terms of cogging torque, back-emf, average torque, power and efficiency. Preliminary results showed that torque, power output and efficiency of the proposed motor are 1.9Nm times, 5.8kW times more than SPMSM and efficiency of 84% thus, can sustain acceleration for long distance travel.

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“…The electric actuator can be designed to be directly coupled and always connected to the wheel [3], spinning together at any velocity. This topology of actuator is called Direct Drive (DD) Wheel Actuator, where the adjective direct underlines that no mechanical device is interposed between the electric motor and the wheel.…”

Section: Introductionmentioning

confidence: 99%

Axial position estimation of conical shaped motor for green taxiing application

Roggia

Galea

Gerada

et al. 2016

2016 IEEE Energy Conversion Congress and Exposition (ECCE)

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Abstract-This paper considers the possibility of adopting a conical shaped motor for Green Taxiing (GT) application. This topology of motor has been selected in order to obviate the presence of external declutching system (i.e. mechanical or electromagnetic clutch) interposed between the electric actuator and the wheel. An axial force contributes to move the rotor inside-out of the stator (principle of sliding-rotor). The axial movement of the rotor can be monitored acting on the magnetizing current. The axial sensor-less position estimation method described hereafter envisages the possibility of evaluating the axial position of the rotor during the engaging and disengaging movement from the wheel. The axial position calculation is dependent on the inductance of the motor. An "online" computation of the position has been implemented through the use of high-frequency injection signals.

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Feasibility and electromagnetic design of direct drive wheel actuator for green taxiing

Cited by 39 publications

References 7 publications

Demagnetization Analysis for Halbach Array Configurations in Electrical Machines

Demagnetization Analysis for Halbach Array Configurations in Electrical Machines

A High Torque Segmented Outer Rotor Permanent Magnet Flux Switching Motor for Motorcycle Propulsion

Axial position estimation of conical shaped motor for green taxiing application

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