Electromagnetic Design Characterization of a Dual Rotor Axial Flux Motor for Electric Aircraft

Talebi, Dorsa; Gardner, Matthew C.; Sankarraman, Sri Vignesh; Daniar, Ahmad; Toliyat, H.A.

doi:10.1109/iemdc47953.2021.9449611

Cited by 12 publications

(6 citation statements)

References 19 publications

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“…In the rotor-referenced synchronous machine model, the currents i q and i d are constant at steady state operation with constant speed, which allows the use of classical control methods, such as PI controllers, which are suitable for following constant references. For the transformation of sinusoidal multiphase machines into dq0 references the Clarke-Park transformation can be used, which is presented in the generalized form for the fundamental component in equation (9). The variables g d , g q , and g 0 in equation ( 9) are quantities in the synchronous reference frame whereas the variables g a , g b , and g m are the quantities of the multiphase sinusoidal system.…”

Section: B5 Moment Of Inertia -Jmentioning

confidence: 99%

“…The YASA topology was originally envisioned as a medium-speed machine (1000 to 6000 rpm) for automotive applications with power below 200 kW [8]. However, there are examples of the use of this topology in applications such as electric aircraft, which demonstrates high performance with high current densities that will be required for takeoff [9], and hybrid electric vehicles such as the Regera hypercar [10].…”

Section: Introductionmentioning

confidence: 99%

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Dispositivo para Medição de Parâmetros Internos, Diagnóstico de Falhas e Previsão de Vida Útil em Capacitores Eletrolíticos de Conversores Utilizados em Veículos Elétricos

Reis¹,

Parizotto²,

Rocha³

et al. 2023

Eletrônica de Potência

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This work addresses the dynamic modeling and the drive of a multiphase YASA-type electric machine for use within electric traction. The main technical aspects of the machine, which can be fed with three or five phases depending on the electrical connection of its windings, are presented. The dynamic model of the machine for the two different electrical connections (three or five phases) is given in the synchronous reference frame and the parameters of the lumped model are obtained through experimental tests. In order to consider the vehicular application, standard driving cycles are used to serve as a reference for the speed whereas vehicular dynamics are considered to define the load torque to be developed by the machine. Afterward, field orientation control (FOC) is implemented for the machine to operate with three or five phases and simulations were carried out to show that the dynamic behavior is similar in both cases. Experimental tests validated the model and the FOC for the machine with both electrical connections. In addition, the reference curves of the driving cycle were satisfactorily followed, indicating the possibility of using the multiphase YASA machine with the control developed in vehicular traction applications.

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Section: B5 Moment Of Inertia -Jmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dispositivo para Medição de Parâmetros Internos, Diagnóstico de Falhas e Previsão de Vida Útil em Capacitores Eletrolíticos de Conversores Utilizados em Veículos Elétricos

Reis¹,

Parizotto²,

Rocha³

et al. 2023

Eletrônica de Potência

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“…The YASA topology enables also the utilization of grain-oriented electrical steel (GOES) [52]- [54], which…”

Section: Iron Core Lossmentioning

confidence: 99%

“…The GOES magnetic properties are anisotropic, therefore it cannot be used normally in rotating electric machines, as the magnetic flux direction in the teeth is different from that in the yoke. On the contrary, the flux in the YASA stator bars (or teeth) is mainly along the axial direction, thus making possible the application of this material to the YASA machines[52]-[54].The only danger from the iron loss standpoint for the YASA motors is related to manufacturing. Sometimes machining is used to achieve particularly tight mechanical tolerances or to make the wedge shape of the stator bars.…”

mentioning

confidence: 99%

Innovations in Axial Flux Permanent Magnet Motor Thermal Management for High Power Density Applications

Jenkins

Jones-Jackson

Zaher

et al. 2023

IEEE Trans. Transp. Electrific.

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At the forefront is the challenging design of electric motors with high efficiencies, torque, and power capabilities. Due to its high performance, the Axial Flux Permanent Magnet (AFPM) Motor is expected to be one of the leading technologies to meet the demands of these industries. Finding the balance between the cooling system's effectiveness and subsequent parasitic losses is key to utilizing these performance benefits.Single stator double rotor topologies achieve the best torque density and lower stator losses, however are more challenging to cool as the stator is in the center of the motor. Single stator single rotor and double stator machines are less challenging to cool but typically have lower power density. Rotor air cooling is discussed including the effectiveness of blades, meshes, and vents which can be optimized to prevent demagnetization. Stator cooling is critical as many machines maximize current density C. Jenkins,

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“…In recent years, with the strict requirements for the performance of the drive electrical machine, the application of grain-oriented silicon steel in the drive electrical machine has gradually developed [ 2 , 3 , 4 , 5 ]. In the axial-flux electrical machine, an electrical machine hub with axial flux is designed in the literature [ 6 ], which adopts yokeless and segmented armature (YASA) structure. In order to improve the magnetic flux density of stator tooth, the stator adopts grain-oriented silicon steel, which makes the motor have higher torque density, higher efficiency and larger torque at low speed, and the effect is remarkable.…”

Section: Introductionmentioning

confidence: 99%

Investigation and Application of Magnetic Properties of Ultra-Thin Grain-Oriented Silicon Steel Sheets under Multi-Physical Field Coupling

et al. 2022

Materials

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Nowadays, energy shortages and environmental pollution have received a lot of attention, which makes the electrification of transportation systems an inevitable trend. As the core part of an electrical driving system, the electrical machine faces the extreme challenge of keeping high power density and high efficiency output under complex workin g conditions. The development and research of new soft magnetic materials has an important impact to solve the current bottleneck problems of electrical machines. In this paper, the variation trend of magnetic properties of ultra-thin grain-oriented silicon steel electrical steel (GOES) under thermal-mechanical-electric-magnetic fields is studied, and the possibility of its application in motors is explored. The magnetic properties of grain-oriented silicon steel samples under different conditions were measured by the Epstein frame method and self-built multi-physical field device. It is verified that the magnetic properties of grain-oriented silicon steel selected within 30° magnetization deviation angle are better than non-grain-oriented silicon steel. The magnetic properties of the same ultra-thin grain-oriented silicon steel as ordinary non-oriented silicon steel deteriorate with the increase in frequency. Different from conventional non-grain-oriented silicon steel, its magnetic properties will deteriorate with the increase in temperature. Under the stress of 30 Mpa, the magnetic properties of the grain-oriented silicon steel are the best; under the coupling of multiple physical fields, the change trend of magnetic properties of grain-oriented silicon steel is similar to that of single physical field, but the specific quantitative values are different. Furthermore, the application of grain-oriented silicon steel in interior permanent magnet synchronous motor (IPM) for electric vehicles is explored. Through a precise oriented silicon steel motor model, it is proved that the magnetic flux density of stator teeth increases by 2.2%, the electromagnetic torque of motor increases by 2.18%, and the peak efficiency increases by 1% after using grain-oriented silicon steel. In this paper, through the investigation of the characteristics of grain-oriented silicon steel, it is preliminarily verified that grain-oriented silicon steel has a great application prospect in the drive motor (IPM) of electric vehicles, and it is an effective means to break the bottleneck of current motor design.

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Electromagnetic Design Characterization of a Dual Rotor Axial Flux Motor for Electric Aircraft

Cited by 12 publications

References 19 publications

Dispositivo para Medição de Parâmetros Internos, Diagnóstico de Falhas e Previsão de Vida Útil em Capacitores Eletrolíticos de Conversores Utilizados em Veículos Elétricos

Dispositivo para Medição de Parâmetros Internos, Diagnóstico de Falhas e Previsão de Vida Útil em Capacitores Eletrolíticos de Conversores Utilizados em Veículos Elétricos

Innovations in Axial Flux Permanent Magnet Motor Thermal Management for High Power Density Applications

Investigation and Application of Magnetic Properties of Ultra-Thin Grain-Oriented Silicon Steel Sheets under Multi-Physical Field Coupling

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