Young's Modulus for Laminated Machine Structures With Particular Reference to Switched Reluctance Motor Vibrations

Tang, Zhangjun; Pillay, Pragasen; Omekanda, A.M.; Li, Chen; Cetinkaya, Çetin

doi:10.1109/tia.2004.827460

Cited by 69 publications

(26 citation statements)

References 9 publications

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“…The peak around 100 Hz need not be mentioned, because it is of little consequence to humans. Figure 10 (b) shows that the SR-EMB has higher natural frequencies than usual [16][17][18]. The SR-EMB does not have any resonance frequency around 1kHz.…”

Section: B Experimental Setup and Natural Frequency Measurement Of Tmentioning

confidence: 95%

Acoustic Noise of Switched Reluctance and Permanent Magnet Motors: A Comparison in the Context of Electric Brakes

Omekanda¹,

Gopalakrishnan²,

Klode³

2007

2007 IEEE Industry Applications Annual Meeting

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It is held as fact that Permanent Magnet (PM) brushless motors are less noisy than Switched Reluctance (SR) motors, and many methods have been published to reduce the noise of SR drives.This paper provides a systematic experimental comparison of both drives, and of proposed noisemitigation strategies, in the context of a specific mass-market application: Automotive Electro Mechanical Brakes (EMB). The two motors were designed to fit into the same envelope and to produce similar dynamic performance for the brake system. Sound pressure levels produced by the two motors at key torque-speed points were measured through dynamometer tests under identical conditions. The influence of the hysteresis current and PWM control methods on the acoustic noise was also studied. The acoustic noise was then measured with the EMB systems assembled with the PM and SR motors. Though the measured acoustic noise of the SR motor with dynamometer tests was higher compared to that of the PM motor, the acoustic noise levels of the two EMB systems were found to be similar with only a slight advantage to the PM based system.

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Section: B Experimental Setup and Natural Frequency Measurement Of Tmentioning

confidence: 95%

Acoustic Noise of Switched Reluctance and Permanent Magnet Motors: A Comparison in the Context of Electric Brakes

Omekanda¹,

Gopalakrishnan²,

Klode³

2007

2007 IEEE Industry Applications Annual Meeting

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“…As a result, Poisson's ratios in the {x, z} and {y, z} planes can be equal to 4 when ν xy is set to 0.3. In [19,27,38] et al, Poisson's ratios are equal to 0.3 in every directions whereas in [33], ν xz = ν yz = 0.03. However, Poisson's ratio has little effect on natural frequencies [38] and thus, for major Poisson's ratio, a value of 0.3 in each direction is considered.…”

Section: Effect Of Stator Core Laminationsmentioning

confidence: 99%

“…In [19,27,38] et al, Poisson's ratios are equal to 0.3 in every directions whereas in [33], ν xz = ν yz = 0.03. However, Poisson's ratio has little effect on natural frequencies [38] and thus, for major Poisson's ratio, a value of 0.3 in each direction is considered. The difference between major and minor coefficients is expressed in (9) for an orthotropic case [36].…”

Section: Effect Of Stator Core Laminationsmentioning

confidence: 99%

Influence of Slots and Rotor Poles Combinations on Noise and Vibrations of Magnetic Origins in `U'-Core Flux-Switching Permanent Magnet Machines

Verez¹,

Barakat²,

Amara³

2014

PIER B

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Abstract-This paper deals with the computation of vibrations and noise of electromagnetic origin for 'U'-shaped stator core flux switching permanent magnet (FSPM) machines. The investigation concerns a family of FSPM stator/rotor configurations with 12 slots and 10, 11, 13, and 14 rotor poles. More precisely, the study focuses on the influence of different number of rotor poles on the sound power level of U-core FSPM machines. Electromagnetic forces acting on the stator frame inner surface are calculated with the Maxwell stress tensor thanks to 2-D finite element (FE) simulations. The local magnetic force density serves then as a boundary condition to the 3-D finite element vibrational simulations of the whole stator frame with housing. Finally, obtained displacements help the authors to conduct the acoustic computations using a dedicated 3-D FE analysis model. The obtained vibro-acoustic spectra help electric machines designers to make appropriate choice of stator/rotor pole combination with respect to specifications at early stages of the design process.

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“…At the same time three parts of the stator core backs are not used because the machine operates as separate magnetic circuit. So these un-used parts can be taken off consequently low losses iron losses [1][2][3][4]. Re-designing the 6/8 SRM by this approach minimizes the losses very much.…”

Section: Introductionmentioning

confidence: 99%

Reconstruction of the Switched Reluctance Motor Stator

El-Kharashi¹,

Hassanien²

2012

Journal of Electrical Engineering

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The paper re-designs the conventional 6/8 switched reluctance motor (SRM) by a particular way to minimize the losses. The flux loops are shortened by making each two stator teeth incorporated in one magnetic circuit only. Subsequently the flux does not cross in some iron parts of the stator core backs. These unused iron sections are taken off consequently the iron losses decreased. Now the stator consists of three separated sections and they are fixed inside non-magnetic cylinder. The copper losses also are decreased because less copper windings are used to produce the same amount of the output torque as the flux paths become short then the flux density increases. The analysis and comparison of the 6/8 SRM before and after the re-design process are presented. A m files Matlab software is used to simulate the dynamic performance. Then the paper proceeds to examine different control techniques to the new design. The hysteresis and PI controllers are used as classical method to control the SRM. Then the artificial neural network (ANN) is used to test the new control techniques.

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Young's Modulus for Laminated Machine Structures With Particular Reference to Switched Reluctance Motor Vibrations

Cited by 69 publications

References 9 publications

Acoustic Noise of Switched Reluctance and Permanent Magnet Motors: A Comparison in the Context of Electric Brakes

Acoustic Noise of Switched Reluctance and Permanent Magnet Motors: A Comparison in the Context of Electric Brakes

Influence of Slots and Rotor Poles Combinations on Noise and Vibrations of Magnetic Origins in `U'-Core Flux-Switching Permanent Magnet Machines

Reconstruction of the Switched Reluctance Motor Stator

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