The effect of tooth shape on radial forces in step motors

So, E.C.T.; Yang, S.J.

doi:10.1109/20.280999

Cited by 6 publications

(2 citation statements)

References 3 publications

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“…As the magnetic field produced by the stator armature coil is transversal and the magnetic field produced by the rotor magnet is axial, the only way to study these motors by numerical models is using 3D numerical models. Analytical models are limited in producing accurate results [1,[4][5][6], as well as the hybrid analytical-numerical models or the hybrid 2D-3D numerical models, despite their reduced computational costs [4]. Due to their complexity, high computational effort, and increased computer memory requirement, the 3D FEMbased studies of the HSMs remain scars [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Analyzing a Three Hundred Teeth Bi-Phase Hybrid Stepper Motor With Different Numbers of Pole Pairs

ICHIM,

CRAIU,

POPESCU

2023

RRST-EE

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The paper presents numerical models of a bi-phase, 0.3° full step hybrid stepper motor (HSM), with 16, 24, 32, 40, and, respectively, 48 poles in the stator. For the motor to move with a constant step angle, the stator and the rotor teeth must be shifted against each other with an angle of zero, 90, 180, and 270 electric degrees for each four consecutive stator poles. Due to this, bi-phase steppers with the number of poles in the stator different than eight are hardly seen. Therefore, to allow the construction of HSMs with different numbers of poles, some of the stator poles must be shifted from their symmetrical position. The five topologies' HSM detent and holding torque characteristics and their geometrical and constructive differences are presented. The Finite Element Method (FEM) based models are developed using the professional software COMSOL Multiphysics.

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Section: Introductionmentioning

confidence: 99%

Analyzing a Three Hundred Teeth Bi-Phase Hybrid Stepper Motor With Different Numbers of Pole Pairs

ICHIM,

CRAIU,

POPESCU

2023

RRST-EE

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“…As shown in figure 1, it is based on the integrated value using the maxwell stress tensor in the line below the stator shoe. The formula for radial force is as follows [13].…”

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confidence: 99%

A Study on Stator Design for Electromagnetic Noise Reduction in Washing Machine Motor

Kim¹

2021

TURCOMAT

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Received:11 november 2020; Accepted: 27 December 2020; Published online: 05 April 2021 Abstract : For low cost, spoke type ferrite magnet motors with small air gap are using to washing machine. At that time, a noise problem occurs, so a design to reduce the noise is required. In the washing machine, set noise increased due to the reduction of air gap of motor at high speed spin mode. Not only the overall noise, but also the harmonics noises are greatly increased at set. As a result of set noise test and noise analysis through finite elements method, a stator tooth shoe shape in which the magnetic flux changes rapidly is cause of noise. Its shape creates many harmonics of load torque. The harmonics component of the load torque increases the overall noise of the set. The harmonics noise of the set has a large correlation with radial force component as well as the torque ripple. Especially, it is found that the harmonics noise of the set is related to harmonics component of load torque and the harmonics component of the radial force at stator tooth. The noise is reduced by applying the new design of stator tooth shoe that can minimize the change in magnetic flux through the noise cause analysis. Through this research, the harmonics noise as well as overall noise are reduced at small airgap motor. Therefore, it is possible to develop cost reduction motor for washing machine.

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Practical analysis of permanent magnet type stepping motor using 2-dimensional finite element method

Yamamoto

Nirei

Ozawa

1995

Advanced Computational and Design Techniques in Applied Electromagnetic Systems

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The effect of tooth shape on radial forces in step motors

Cited by 6 publications

References 3 publications

Analyzing a Three Hundred Teeth Bi-Phase Hybrid Stepper Motor With Different Numbers of Pole Pairs

Analyzing a Three Hundred Teeth Bi-Phase Hybrid Stepper Motor With Different Numbers of Pole Pairs

A Study on Stator Design for Electromagnetic Noise Reduction in Washing Machine Motor

Practical analysis of permanent magnet type stepping motor using 2-dimensional finite element method

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