Optimal value of air gap induction in an induction motor

This article proposes a mathematical model of an axial flux induction motor (AFIM) with one stator and one rotor. The model is based on the expression for the electromagnetic torque, which presents a function of two independent variables: the axial length of the stator core and the flux density in the air gap. This allows calculating the main dimensions of the motor with the highest possible torque density. Thus, developed model is suitable for designing the motor of specified volume with maximum torque, and solving the inverse problem of minimizing the machine volume with the specified torque. The detailed output of the model and the results of the calculations for the low-power engine powered by voltage of 7.35 V (RMS) are given. The results are validated using FEM in ANSYS software: with the outer motor diameter of 0.11 m, the flux density in it reaches 1.2 T.

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“…In the paper [15], M.N. Benallal gives the basic principles of the model of an induction motor proposed by M.A.…”

Section: Methodsmentioning

confidence: 99%

Analytical Model for the Design of Axial Flux Induction Motors with Maximum Torque Density

Baranov

Zolotarev

Ostrovskii

et al. 2021

WEVJ

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“…This problem also occurs in other specific electromechanical devices, such as MR brakes and motor pumps. Based on the design experience and industrial practice relating to small and middle power induction machines [31], MR brakes [10], and motor pumps [32], it can be concluded that the recommended MR value of the MR fluid gaps should be within the range of 0.5-1 mm, i.e., g = (0.5−1) mm [8,[31][32][33].…”

Section: Choice Of Thickness Of Mr Fluid Gap Thickness Of Discs and I...mentioning

confidence: 99%

“…Typically, the recommended value of the magnetic flux density B 0 in the movement region of electromechanical devices, i.e., in the air gaps of induction motors [33], fluid gaps of MR brakes, or fluid gaps of MR clutches [10,23] is equal to 0.7T . In a multi-disc MR clutch, the movement region consists of the MR fluid gaps and ferromagnetic discs.…”

Section: Choice Of Working Points At B-h Curves and Yield Stress Vs M...mentioning

confidence: 99%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Kluszczyński,

Pilch

2021

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This study proposes a new integrated analytical-field design method for multi-disc magnetorheological (MR) clutches. This method includes two stages, an analytical stage (composed of 36 algebraic formulas) and a field stage based on the finite element method (FEM). The design procedure is presented systematically, step-by-step, and the results of the consecutive steps of the design calculations are depicted graphically against the background of the entire considered clutch. The essential advantage of the integrated method with this two-stage structure is the relatively high accuracy of the first analytical stage of the design procedure and the rapid convergence of the second field stage employing the FEM. The essence of the new method is the introduction of a yoke factor k Y (the concept of which is based on the theory of induction machines) that determines the ratio of the total magnetomotive force required to magnetise the entire magnetic circuit of the clutch to the magnetomotive force required to magnetise the movement region. The final value, the yoke factor k Y is determined using loop calculations. The simplicity of the developed design method predisposes its use in optimisation calculations. The proposed method can also be adapted to other MR devices analysed in shear mode.

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“…Boglietti and friends outlined how the electromagnetic design of a three-phase induction motor is effectuated [5]. Benallal et al [6] analyzed the impact of the air gap induction and the relative stator bore diameter values of the induction motor on motor performance. They analyzed the impacts of air gap length on the main inductance, stator and rotor inductance, current, moment, output power and efficiency of the induction motor [7].…”

Section: Introductionmentioning

confidence: 99%

A Novel Slitted Tooth Core Design to Improve the Torque-Speed Characteristic of Squirrel Cage Induction Motor

Yetgin

2016

IJRET

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In this study, a new design was suggested in order to improve the performance of induction motors. In these new designs, slits were applied in the middle of stator and rotor tooth parts. In these slitted models, the depth and width of slits were optimized by Finite Element Method Magnetics (FEMM) by using Finite Elements Method (FEM). Starting torque, pull-out torque, rated torque and torque-speed characteristics of the new motor model formed with the proposed slitted construction and reference motor model are given in comparison. The motor model is made with 56 slits which have different depth and width to see the effects of slits in the stator and rotor. In modeling, 3 kW squirrel-cage induction motor was used. As a result of modeling, increase in the coupling flux provided 2.085% and 4% increase especially in pull-out and rated torque values respectively.

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Optimal value of air gap induction in an induction motor

Cited by 5 publications

References 2 publications

Analytical Model for the Design of Axial Flux Induction Motors with Maximum Torque Density

Analytical Model for the Design of Axial Flux Induction Motors with Maximum Torque Density

Bulletin of the Polish Academy of Sciences: Technical Sciences

A Novel Slitted Tooth Core Design to Improve the Torque-Speed Characteristic of Squirrel Cage Induction Motor

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