Systematically Exploring the Effects of Pole Count on the Performance and Cost Limits of UltraHigh Efficiency Fractional hp Axial Flux PM Machines

Taran, Narges; Rallabandi, Vandana; Heins, Greg; Ionel, Dan M.

doi:10.1109/tia.2019.2943814

Cited by 15 publications

(6 citation statements)

References 24 publications

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“…This section examines the three dominant electromagnetic loss sources of the AFPM motors, with special regard to the YASA topology: permanent magnets' eddy loss, winding's copper loss, and iron core loss [21]. As previously explained, the stator iron core of the YASA topology is substantially reduced compared to equivalent radial flux machines, so the iron core loss is usually less concerning.…”

Section: Main Loss Sourcesmentioning

confidence: 99%

“…Consequently, the AFPM motors are typically affected by substantial AC copper loss. Furthermore, the electric frequency of the AFPM motors can reach significant values since the number of poles is preferably high [14], [19]- [21], [36].…”

Section: B Copper Lossmentioning

confidence: 99%

“…The copper loss represents the dominant part of the electromagnetic losses in AFPM motors [21]. Therefore, highly effective cooling systems are necessary for the windings to prevent failures of the electric insulation layer, stator bar lamination adhesive, and bearing lubrication breakdown due to high temperatures [51].…”

Section: B Copper Lossmentioning

confidence: 99%

“…The iron core losses in the electric machines are due to the BH curve hysteresis and the eddy currents. Both these two effects are function of the electric frequency of the motor, and as discussed in the sections above, the fundamental frequency of the AFPMs is not low typically, because of the high polarity [14], [19]- [21], [36]. The most common approach to limit the iron loss without sacrificing the iron core magnetic performance is by utilizing higher grade magnetic laminations, thinner and with a higher amount of silicon or just switching to cobalt steel CoFe and SMC.…”

Section: Iron Core Lossmentioning

confidence: 99%

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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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Section: Main Loss Sourcesmentioning

confidence: 99%

Section: B Copper Lossmentioning

confidence: 99%

Section: B Copper Lossmentioning

confidence: 99%

Section: Iron Core Lossmentioning

confidence: 99%

See 2 more Smart Citations

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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show abstract

“…A large-scale model-based design optimisation process consists of a machine model for evaluating performance indicators and an optimisation algorithm for seeking the optimal global designs. Finite element analysis (FEA) has been established as the method of choice for detailed studies of the electric machine with complex geometries and materials and has been extensively employed for optimisation in recent years [1][2][3][4][5][6]. The parameterised finite element (FE) model is adjusted to increase specific performance metrics regarding the application requirements.…”

Section: Introductionmentioning

confidence: 99%

Ultra‐fast finite element analysis of coreless axial flux permanent magnet synchronous machines

Chulaee,

Ionel

2024

IET Electric Power Appl

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Large‐scale design optimisation techniques enable the design of high‐performance electric machines. Electromagnetic 3D finite element analysis (FEA) is typically employed in optimisation studies for accurate analysis of axial flux permanent magnet (AFPM) machines, which require extensive computational resources. To reduce the computational burden, a FEA‐based mathematical method relying on the geometric and magnetic symmetry of coreless AFPM machines is proposed to estimate the machine performance indicators using the least number of FEA solutions, thereby significantly lowering the running time. This method is generally applicable to AFPM machines with low saturation effects and cogging torque as exemplified for a printed circuit board (PCB) stator coreless AFPM machine. To further reduce the computation time, a systematically simplified equivalent 3D FEA model for planar PCB coils integrated with this machine is also proposed. The practical implementation of the introduced method is elaborated based on an example optimisation study, and an analytical method for fast design scaling is also discussed. The results of the proposed approach are compared with detailed transient FEA results, and a prototype 26‐pole PCB stator coreless AFPM machine was also used to validate the results experimentally.

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Optimization Design of Brushless DC Motor Based on Combined Scanning Method and Genetic Algorithm

Li,

Tian,

et al. 2024

Lecture Notes in Electrical Engineering

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Systematically Exploring the Effects of Pole Count on the Performance and Cost Limits of UltraHigh Efficiency Fractional hp Axial Flux PM Machines

Cited by 15 publications

References 24 publications

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

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

Ultra‐fast finite element analysis of coreless axial flux permanent magnet synchronous machines

Optimization Design of Brushless DC Motor Based on Combined Scanning Method and Genetic Algorithm

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