Experimental Study on Reducing Cogging Torque and No-Load Power Loss in Axial-Flux Permanent-Magnet Machines With Slotted Winding

Caricchi, F.; Capponi, Fabio Giulii; Crescimbini, Fabio; Solero, Luca

doi:10.1109/tia.2004.831273

Cited by 75 publications

(36 citation statements)

References 8 publications

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“…Cogging torque of IPMSM is reduced in this research by using the proposed KSM. A lot of techniques are proposed for the reduction of cogging torque of the IPMSM, the surface mounted permanent magnet synchronous machine, and the axial flux permanent magnet machine [19][20][21][22][23][24][25][26][27][28][29][30]. These approaches indicate that the pole-arc to pole-pitch ratio strongly effects on the cogging torque.…”

Section: Verification Of the Ksm Via Optimization Of The Ipmsmmentioning

confidence: 99%

Minimization of a Cogging Torque for an Interior Permanent Magnet Synchronous Machine using a Novel Hybrid Optimization Algorithm

Kim¹,

Woo²,

Lim³

et al. 2014

Journal of Electrical Engineering and Technology

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-Optimization of an electric machine is mainly a nonlinear multi-modal problem. For the optimization of the multi-modal problem, many function calls are required with much consumption of time. To address this problem, this paper proposes a novel hybrid algorithm in which function calls are less than conventional methods. Specifically, the proposed method uses the kriging metamodel and the fill-blank technique to find an approximated solution in a whole problem region. To increase the convergence speed in local peaks, a parallel gradient assisted simplex method is proposed and combined with the kriging meta-model. The correctness and usefulness of the proposed hybrid algorithm is verified through a mathematical test function and applied into the practical optimization as the cogging torque minimization for an interior permanent magnet synchronous machine.

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Section: Verification Of the Ksm Via Optimization Of The Ipmsmmentioning

confidence: 99%

Minimization of a Cogging Torque for an Interior Permanent Magnet Synchronous Machine using a Novel Hybrid Optimization Algorithm

Kim¹,

Woo²,

Lim³

et al. 2014

Journal of Electrical Engineering and Technology

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“…Finally, the ratio between the end turns of the two types of coil is expressed as: l cw end turn l tw end turn = N c l stat π(R o + R i )+N c w slot (6) This ratio corresponds to the amount of copper required for end turns in core-wound coils with respect to toothwound coils; whenever this ratio is less than unity, the core-wound coil is shorter than the tooth-wound coil.…”

Section: Winding Configurationmentioning

confidence: 99%

Fractional-slot concentrated-winding axial-flux permanent magnet machine with core-wound coils

Donato

Capponi

Caricchi

2010

2010 IEEE Energy Conversion Congress and Exposition

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This paper presents the design, finite element analysis (FEA) and experimental verification of a single stator double rotor fractional-slot concentrated-winding (FSCW) axial-flux permanent magnet (AFPM) machine, with core-wound coils. The advantages that are obtained by adopting such coil construction, in terms of shorter end-winding connections, higher fill factor and mechanical robustness of the magnetic structure are highlighted. Machine performances both at no load and at rated load are analyzed through static FEA and a simple index is introduced, in order to compare induced losses in the permanent magnets for various machine configurations. The construction and experimental testing of a full scale prototype is described, in order to confirm the expected performances and to characterize the prototype in terms of losses, cogging torque and main machine parameters. © 2010 IEEE

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“…These methods cover various slot types of the analyzed permanent magnet motors. Moreover, several authors proposed different magnet geometries to reduce the effect of cogging torque [9,10]. Besides, the use of axial flux machines is another application to mitigate the negative effects of cogging torque.…”

Section: Introductionmentioning

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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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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Experimental Study on Reducing Cogging Torque and No-Load Power Loss in Axial-Flux Permanent-Magnet Machines With Slotted Winding

Cited by 75 publications

References 8 publications

Minimization of a Cogging Torque for an Interior Permanent Magnet Synchronous Machine using a Novel Hybrid Optimization Algorithm

Minimization of a Cogging Torque for an Interior Permanent Magnet Synchronous Machine using a Novel Hybrid Optimization Algorithm

Fractional-slot concentrated-winding axial-flux permanent magnet machine with core-wound coils

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

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