Design and Test of an Axial Flux Permanent-Magnet Machine With Field Control Capability

Gonzalez-Lopez, Delvis; Tapia, Juan A.; Wallace, R.; Valenzuela, A.

doi:10.1109/tmag.2008.2000543

Cited by 40 publications

(16 citation statements)

References 6 publications

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“…In order to improve the wide speed range of axial flux PMSM, various special field-weakening methods are proposed and researched [21][22][23][24][25][26][27][28][29][30]. In [21], the rotor pole of the machine adopts a combination of a rare earth magnet (neodymium-iron-bore) and soft laminated iron to reduce the total d-axis reluctance.…”

Section: Introductionmentioning

confidence: 99%

“…In [21], the rotor pole of the machine adopts a combination of a rare earth magnet (neodymium-iron-bore) and soft laminated iron to reduce the total d-axis reluctance. So the field-weakening characteristic is obtained by injecting a relatively small negative d-axis current.…”

Section: Introductionmentioning

confidence: 99%

“…From Equation (21), it can be seen that the higher the friction is, the bigger the speed difference is. Because of this speed difference, the relationships between the electromagnetic parameters and the speed show a hysteretic characteristic, which means the trace during speed increasing is not the same with the trace during speed decreasing.…”

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confidence: 99%

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Research on an Axial Flux PMSM with Radially Sliding Permanent Magnets

Zhao

2015

Energies

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Axial flux permanent-magnet synchronous machines (PMSMs) are very suitable candidates for the power train of electric vehicles (EVs) due to high power density and high efficiency. This paper researches an axial flux PMSM with radially sliding permanent magnets (PMs) to fulfill field-weakening control. The field weakening principle and the structure of this kind of axial flux PMSM by mechanical method of sliding PMs are proposed and analyzed. The influences of radially sliding PMs on magnetic flux density distribution, inductance, flux linkage and torque are analyzed and discussed based on 3D finite element method (FEM). The field weakening capabilities by mechanical method and electrical method are compared. The field weakening capability of the machine can be much improved by the optimized combination of the two methods, which is very satisfying for EV drive application. The forces on the PMs are analyzed and calculated. The hysteretic characteristics caused by the friction of the PMs are investigated, which provide useful reference for designing this kind of machine.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Research on an Axial Flux PMSM with Radially Sliding Permanent Magnets

Zhao

2015

Energies

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“…So, the soft magnetic regions provide occurring low reluctance regions. Therefore, the magnets are outside the reverse magnetic domains [17].…”

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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“…However, this method requires complicated control schemes and efforts in axial force compensation, which may limit the range of the electromagnetic torque. Dual air-gap axial flux machines are used in [19], [24]- [26] where the total axial force is equal to the difference between the two attractive forces of the two air-gaps, and a wider range of field control capability can be achieved. However, these systems have other complications such as the requirement of two power electronic converters to drive the three-phase AC currents [25], [26] or two different converters for the AC currents and for the DC field current drive [19].…”

mentioning

confidence: 99%

Modeling and Position-Sensorless Control of a Dual-Airgap Axial Flux Permanent Magnet Machine for Flywheel Energy Storage Systems

Nguyen

Beng

Tseng

et al. 2012

Journal of Power Electronics

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This paper presents the modeling and position-sensorless vector control of a dual-airgap axial flux permanent magnet (AFPM) machine optimized for use in flywheel energy storage system (FESS) applications. The proposed AFPM machine has two sets of three-phase stator windings but requires only a single power converter to control both the electromagnetic torque and the axial levitation force. The proper controllability of the latter is crucial as it can be utilized to minimize the vertical bearing stress to improve the efficiency of the FESS. The method for controlling both the speed and axial displacement of the machine is discussed. An inherent speed sensorless observer is also proposed for speed estimation. The proposed observer eliminates the rotary encoder, which in turn reduces the overall weight and cost of the system while improving its reliability. The effectiveness of the proposed control scheme has been verified by simulations and experiments on a prototype machine. Keywords

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Design and Test of an Axial Flux Permanent-Magnet Machine With Field Control Capability

Cited by 40 publications

References 6 publications

Research on an Axial Flux PMSM with Radially Sliding Permanent Magnets

Research on an Axial Flux PMSM with Radially Sliding Permanent Magnets

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

Modeling and Position-Sensorless Control of a Dual-Airgap Axial Flux Permanent Magnet Machine for Flywheel Energy Storage Systems

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