A new axial flux permanent magnet Segmented-Armature-Torus machine for in-wheel direct drive applications

Original scientific paper This paper presents a novel approach in design of toroidal axial flux permanent magnet open-slotted NN type (TAFPMOS-NN) motor. TAFPMOS-NN motor is an accomplished both theoretical and experimental model. The results of theoretical works and experimental works are performed. TAFPMOS-NN has open-slotted structure and the winding on the core surface which are the most important properties of TAFPMOS-NN motor. This situation has created the hybrid structure electric machine by combining toroidal winding without open-slotted motor properties and toroidal winding with open-slotted motor properties. The mentioned motor types have a problem such as cogging torque. The cogging problem is resolved greatly by the proposed method so that high torque, efficiency and cost saving for TAFPMOS-NN type motor are acquired. Keywords: finite element analysis; optimization; toroidal axial flux permanent magnet open-slotted NN type motor Novi pristup u primjeni i projektiranju NN tipa motora otvorenih utora s permanentnim magnetima prstenastog aksijalnog toka (TAFPMOS-NN)Izvorni znanstveni članak Ovaj rad predstavlja novi pristup u konstrukciji motora NN tipa otvorenih utora s permanentnim magnetima prstenastog aksijalnog toka (TAFPMOS-NN). TAFPMOS-NN motor ostvarenje je i teorijskog i eksperimentalnog modela. Provjereni su rezultati teorijskih i eksperimentalnih radova. TAFPMOS-NN je konstruiran s otvorenim utorima i namotima na površini jezgre što su najvažnija svojstva TAFPMOS-NN motora. Stvoren je električni stroj hibridne strukture s kombinacijom prstenastih namota bez karakteristika motora s otvorenim utorima i prstenastih namota s karakteristikama motora s otvorenim utorima. Navedene vrste motora imaju problem zakretnog momenta zupčanika (cogging torque). Predložena metoda rješava taj problem, pa je postignuta učinkovitost i smanjenje troškova za TAFPMOS-NN tip motora.Ključne riječi: metoda konačnih elemenata; NN tip motora otvorenih utora s permanentnim magnetima prstenastog aksijalnog toka; optimizacija

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“…5. Previous studies mentioned high cost production of the stator [4]. The stator core is manufactured easily by using the open-slotted structure.…”

Section: The Application Of Designed Modelmentioning

confidence: 99%

A new approach in application and design of toroidal axial-flux permanent magnet open-slotted NN type (TAFPMOS-NN) motor

2015

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“…In recent years, as the manufacturing process became simpler, the price became viable for the commercial market and the demand for axial field motors increases. Today the motors are widely being used in electric vehicles such as solar power vehicles [4], bicycles [5], and most recently, as in-wheel drives of larger EVs [7,8,9]. K. Sitapati and R. Krishnan made a comparison study on 0.25 ܹ݇ to 10 ܹ݇ axial and radial BLDC motor topologies [10].…”

Section: Electric Motormentioning

confidence: 99%

Integration of a Folding Electric Two-wheeler Vehicle for a Future Commuting Transportation

Gudmundsson

Larsen

2012

WEVJ

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The paper issues the development, building and testing of a Folding Electric Motorbike, a lightweight, low cost and all-electric two-wheeler vehicle taking full advantage on today's city infrastructure. The technology offers drivers to combine transportation methods, lowering cost, and greenhouse gas emission. The paper documents innovative studies on how the technology can be used to explode the today's transportation system and be used to bridge the gap of today's challenges and future solutions. The optimum components to be used in the small, lightweight vehicles are selected based on the technology's functional requirements. The selection of motorbike's drivetrain components is based on the latest available technology, with respect to economic viability. The technologies first two development stages are described. In the first development stage the vehicle's functional requirements are defined. This is followed by a feasibility study and a realization on technologies capabilities. The feasibility study is performed by developing, building and evaluating an alpha-prototype vehicle. The research indicate that the possibility of developing a powerful , light-weight, low cost and all-electric two-wheeler vehicle taking full advantage on today's city infrastructure is very prospective. The alpha-prototype was successfully constructed and is considered to be ready for further laboratory testing and test driving before continuations on a fully designed beta-prototype.

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“…Permanent magnet synchronous machines (PMSMs) with an outer-rotor have been used as in-wheel direct drive motors for EVs, due to their high torque density, excellent efficiency and overload capability [7]. However, there may be risks of demagnetization and mechanical damage of the rotor's magnet in extreme driving conditions.…”

Section: Introductionmentioning

confidence: 99%

Design improvement of a new outer-rotor hybrid excitation flux switching motor for in-wheel drive EV

Ahmad

Sulaiman

Haron

et al. 2013

2013 IEEE 7th International Power Engineering and Optimization Conference (PEOCO)

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-Research and developments of in-wheel motors applied in pure electric vehicles (EVs) propulsion systems have attracted great attention recently. This is due to their definite advantages of great controllability for each independent wheel as well as the availability of more cabin space due to removal of conventional mechanical transmission and differential gears. Moreover, more series batteries can be installed to increase the driving distance. Since the motors are attached directly to the wheel, the major requirements are to have high torque density and efficiency. As one of alternative candidates with high torque possibility, a new design of outer-rotor hybrid excitation flux switching motor for in-wheel drive EV is proposed in this paper. The proposed motor consists of 12 slots of stator poles, and 10 rotor poles, with all active parts are located on the stator. In addition, it has a robust rotor structure which only comprises a single piece of rotor and has a wide range flux control capabilities. Under some design restrictions and specifications for the target EV drive applications, the performance of the proposed machine on the initial design and improved design are analyzed based on 2-D finite element analysis (FEA). The performance of the improved design motor shows that the maximum torque achieved is 81.5% of the target performance, whereas the maximum power has achieved 143.6 kW which is greater than the target value. Thus, by further design refinement and optimization it is expected that the motor will successfully achieve the target performances.

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A new axial flux permanent magnet Segmented-Armature-Torus machine for in-wheel direct drive applications

Cited by 67 publications

References 6 publications

A new approach in application and design of toroidal axial-flux permanent magnet open-slotted NN type (TAFPMOS-NN) motor

A new approach in application and design of toroidal axial-flux permanent magnet open-slotted NN type (TAFPMOS-NN) motor

Integration of a Folding Electric Two-wheeler Vehicle for a Future Commuting Transportation

Design improvement of a new outer-rotor hybrid excitation flux switching motor for in-wheel drive EV

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