Investigation of Electromagnetic Force Components in SRM Under Single and Multiphase Excitation

Edrington, Chris S.; Kaluvagunta, D.C.; Joddar, J.; Fahimi, Babak

doi:10.1109/tia.2005.851044

Cited by 29 publications

(6 citation statements)

References 12 publications

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“…Radial forces and tangential flux density are computed by JMAG software in every node. Force density can be expressed as follows [19][20][21][22][23][24][25]:…”

Section: Analytical Procedures For Vibration Analysis and Calculation mentioning

confidence: 99%

“…Hence,

y_{normals} = \frac{t_{s, y}}{2}

Radial forces and tangential flux density are computed by JMAG software in every node. Force density can be expressed as follows [19–25]:

F_{n} = \frac{()(, B_{n}^{2} - B_{normalt}^{2})}{2 μ_{0}}

F_{normalt} = \frac{B_{n} B_{normalt}}{μ_{0}}

B_{normalt}

B_{n}

F_{normalt}

and

F_{n}

are tangential flux density, radial flux density, tangential force density and radial force density, respectively. The tangential force can be expressed as follows:

F_{normalt} = \int_{0}^{2 π} \frac{1}{2 μ_{0}} ()(, B_{n}^{2} - B_{normalt}^{2}) r_{gap} d φ

The displacement of the stator causes the radial force according to (21).…”

Section: Theory Analysis Of the Stator And Rotor Structures Of The Nementioning

confidence: 99%

See 1 more Smart Citation

Noise reduction in switched reluctance motor by modifying the structures

Hosseini

Alinejad‐Beromi

2020

IET Electric Power Applications

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The magnetic effects and consequently the radial force are the main causes of noise in switched reluctance motors (SRMs). In this study a new design for SRM is developed in order to reduce acoustic noise. In this research a new design for SRM is developed in order to reduce the acoustic noise. In this investigation, at first, different SRM structures are simulated using JMAG software. An 8/6-pole SRM is designed and built with special modification in the rotor and stator structures. For increasing mechanical strength, trapezoidal stator and rotor pole shape with poles arc β r = β s = 21° are proposed. In this design the taper angles of stator and rotor poles are equal. For noise reduction, the mechanical restructuring is done according to stress analysis. The new designed SRM are simulated and tested experimentally under no-load and full-load conditions. The results are shown and compared. Comparison between these results and the results of other structures shows that the acoustic noise of the newly designed motor is reduced considerably. The results show an acoustic noise reduction of ∼72% in new structure SRM.

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“…Radial forces and tangential flux density are computed by JMAG software in every node. Force density can be expressed as follows [19][20][21][22][23][24][25]:…”

Section: Analytical Procedures For Vibration Analysis and Calculation mentioning

confidence: 99%

“…Hence,

y_{normals} = \frac{t_{s, y}}{2}

Radial forces and tangential flux density are computed by JMAG software in every node. Force density can be expressed as follows [19–25]:

F_{n} = \frac{()(, B_{n}^{2} - B_{normalt}^{2})}{2 μ_{0}}

F_{normalt} = \frac{B_{n} B_{normalt}}{μ_{0}}

B_{normalt}

B_{n}

F_{normalt}

and

F_{n}

are tangential flux density, radial flux density, tangential force density and radial force density, respectively. The tangential force can be expressed as follows:

F_{normalt} = \int_{0}^{2 π} \frac{1}{2 μ_{0}} ()(, B_{n}^{2} - B_{normalt}^{2}) r_{gap} d φ

The displacement of the stator causes the radial force according to (21).…”

Section: Theory Analysis Of the Stator And Rotor Structures Of The Nementioning

confidence: 99%

Noise reduction in switched reluctance motor by modifying the structures

Hosseini

Alinejad‐Beromi

2020

IET Electric Power Applications

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“…The MST method was used to solve the electromagnetic force in this paper. Because only this method could solve the details of the electromagnetic force density distribution on the stator teeth surface, which is necessary to the vibration simulation of the generator based on this method, the electromagnetic force density F on the surface of the stator teeth can be described as [15]:…”

Section: Electromagnetic Force Analysismentioning

confidence: 99%

Electromagnetic Vibration Simulation of a 250-MW Large Hydropower Generator with Rotor Eccentricity and Rotor Deformation

Peng

et al. 2017

Energies

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Abstract:The electromagnetic vibration caused by electromagnetic force on the stator has threatened large hydro generators operating safely and stably. At the Zhexi hydropower station, the hydro generator was beset by electromagnetic vibration for a long time. Therefore, the paper provided a new method to help to find the vibration source and detect the hydro generator fault, through the combination of simulation and experiments. In this paper, the 3D stator pack structure model and the 2D hydro generator electromagnetic models under rotor eccentricity and rotor ellipse deformation conditions were built. Then, electromagnetism simulations were conducted to study the characteristics of the electromagnetic flux and electromagnetic force under different conditions by using the finite element method (FEM). Lastly, the vibration testing experiments and harmonic response simulations of stator frame were performed to present the characteristics of vibration distribution in frequency conditions. The simulation results were compared with the generator measured data to try to find out the main vibration source and guide the overhaul.

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“…For this case study, the vibration at the aligned rotor position is assumed to be a fair reference point due to the fact that there exists the larges radial force [1], [13]. Thus, at the aligned rotor position, the three dimensional accelerations are calculated using eqn.…”

Section: Development Of the Multiphysics Fea Modelmentioning

confidence: 99%

Efficient multiphysics modelling of vibration and acoustic noise in switched reluctance motor drives

Lin

Wang

Fahimi

2014

IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society

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Acoustic noise has been reported as a major problem in Switched Reluctance Machines (SRMs) for noise sensitive applications. This issue has drawn significant attention over the past decades. In this paper, a numerical method used to predict vibration with high computational efficiency is introduced. The accuracy of this method is demonstrated by the comparison of the calculated results and the multiphysics Finite Element Analysis (FEA) simulation. Finally, based on this method, a fast process for the optimal design of the stator frame is proposed to reduce the vibration and acoustic noise in SRMs.Index Terms-switched reluctance machine, vibration, acoustic noise.

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Investigation of Electromagnetic Force Components in SRM Under Single and Multiphase Excitation

Cited by 29 publications

References 12 publications

Noise reduction in switched reluctance motor by modifying the structures

Noise reduction in switched reluctance motor by modifying the structures

Electromagnetic Vibration Simulation of a 250-MW Large Hydropower Generator with Rotor Eccentricity and Rotor Deformation

Efficient multiphysics modelling of vibration and acoustic noise in switched reluctance motor drives

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