Axial flux induction motor, design and evaluation of steady state modeling using equivalent circuit

Nobahari, Amin; Darabi, Ahmad; Hassannia, Amir

doi:10.1109/pedstc.2017.7910351

Cited by 15 publications

(9 citation statements)

References 6 publications

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“…Generally, this machine is the best choice for low torque applications such as fans, pumps, food processors, etc. [29] Also, it can be said that single-sided AFIMs are more resistant to static eccentricity than conventional motors [30,31]. The disadvantage of this type of machine is that bearing life depends on their load.…”

Section: Axial Flux Machine Topologiesmentioning

confidence: 99%

Performance Analysis of Axial-Flux Induction Motor with Skewed Rotor

2020

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In recent years, with developing technology in the field of electrical machines, more efficient and high power density electric motors have been produced. The use of high energy efficiency motors gains importance due to the increase in global energy demand. The main purpose of this study was to design an Axial Flux Induction Motor (AFIM) with the same efficiency class as the Radial Flux Induction Motor (RFIM) in premium efficiency (IE3) class which is used commonly in industrial applications. Various AFIMs are designed with different rotor slot numbers and performance analyses as efficiency and torque ripple changes are investigated. It is known that torque ripple is one of the key parameters in electrical machine design which should be kept as low as possible without decreasing efficiency and torque. Accordingly, AFIMs’ rotor slots are skewed considering the stator and rotor slot numbers. The use of a Soft Magnetic Composites (SMC) material in design is also investigated. As a result of the analyses, many premium efficiency classes for AFIMs are obtained. In addition, using SMC material and skewing the rotor slots provides that torque ripples be reduced.

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Section: Axial Flux Machine Topologiesmentioning

confidence: 99%

Performance Analysis of Axial-Flux Induction Motor with Skewed Rotor

2020

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“…4, first the motor has to be designed without skewing. Equations presented in [25] can be used at this step. Then, its FE model has to be developed.…”

Section: Relative Position Of the Rotor Discsmentioning

confidence: 99%

“…Often it is preferable to use a 3D model for torque evaluation of an axial flux motor. However, in the absence of skewed slots, a 2D model can be employed instead to obtain the torque waveform with some accuracy while requiring less computer memory and calculation time [25]. After obtaining steady-state response, fast Fourier transform (FFT) should be used to analyse the torque frequency components.…”

Section: Relative Position Of the Rotor Discsmentioning

confidence: 99%

Various skewing arrangements and relative position of dual rotor of an axial fluxinduction motor, modelling and performance evaluation

Nobahari

Darabi

Hassannia

2018

IET Electric Power Applications

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Using a dual air-gap structure in a disc-type motor is an effective solution to eliminate undesirable axial force between stator and rotor, by which higher power density can be achieved, too. Furthermore, some of the performance characteristics such as pulsating torque may be improved greatly by adjusting the existing extra selective design parameters in a dual air-gap motor. Accordingly, in this study, a widespread design consideration is carried out on rotor skewing arrangements of a dual rotor (DR) axial flux induction motor with the aim of pulsating torque reduction. The studied scenarios include when the slots of both rotors are skewed exactly similar with different skew angles, the slots of both rotors are skewed similarly but in the opposite directions and the slots of both rotors are not skewed but one rotor is mounted on the shaft by some shift angle relative to the other. The last one is introduced as an alternative to skewed rotors, which is easily executable in small and large size motors with DR topology. Moreover, an algorithm is proposed to determine the appropriate shift angle. Three-dimensional time stepping finite element analysis is employed in all cases for verification. Fig. 12 Torque waveforms at 20% slip for the initial design, skewed rotors and non-skewed shifted rotors

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“…The electromagnetic design and analysis of AFIMs is commonly performed by employing numerical approaches based on the finite element method (FEM) [7], [12], [13]. The first step in the AFIM design process is the critical selection of appropriate values for the geometrical and operational design parameters.…”

Section: Introductionmentioning

confidence: 99%

“…• Step 7: Derivation ofî r andî s according to(20) and(21) respectively.Calculation of l r,y , w r,t,inner , w r,sl Derivation of i r , i r ' and i s w r,sl >0 j=j+1 NO YES Computation of A r,sl and h r,sl Calculation of n s Calculation of l s,y , w s,t,inner , w s,sl w s,sl >0 NO Computation of A s,sl and h s,sl YES A s,min <A s <A s,max NOCalculation of Outline of the proposed preliminary electromagnetic sizing algorithm for DR-AFIM geometries. Calculation of l s,y , w s,t,inner and w s,sl according to (11)-(13). If w s,sl < 0, the algorithm should return to step 2 and proceed to the next iteration.• Step 8: Computation of A s,sl and h s,sl according to (8).…”

mentioning

confidence: 99%

Preliminary Electromagnetic Sizing of Axial-Flux Induction Machines

Bitsi

Beniakar

Wallmark

et al. 2020

2020 International Conference on Electrical Machines (ICEM)

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This paper presents a preliminary electromagnetic sizing algorithm for double-rotor axial-flux induction machines (DR-AFIMs). The proposed algorithm is based on a geometrical approach and limits the use of empirical factors and past experience. The sizing equations for all the main geometrical and operational machine parameters are derived and a concise outline of the electromagnetic sizing algorithm is provided. The efficacy of the implemented algorithm is validated using finiteelement DR-AFIM models. The achievement of the targeted specifications in the preliminary DR-AFIM designs is proven and demonstrated.

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Axial flux induction motor, design and evaluation of steady state modeling using equivalent circuit

Cited by 15 publications

References 6 publications

Performance Analysis of Axial-Flux Induction Motor with Skewed Rotor

Performance Analysis of Axial-Flux Induction Motor with Skewed Rotor

Various skewing arrangements and relative position of dual rotor of an axial fluxinduction motor, modelling and performance evaluation

Preliminary Electromagnetic Sizing of Axial-Flux Induction Machines

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