Unstable Electrical Vibration of an Induction Motor.

Kanzaki, Hidetoshi; Shibayama, Juzaburo; Watanabe, Satoshi; Ichimonji, Masayuki; Namiki, Masao

doi:10.1299/kikaic.60.3238

Cited by 8 publications

(3 citation statements)

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“…In Ref. (20), Kanzaki, et al studied the electromagnetic exciting force of two times the power source frequency caused by unbalance of the magnetomotive force on the stator core. The unstable oscillation denoted by the Matthew equation by electromagnetic excitation force for a three-phase induction motor is clarified by a numerical simulation, and it is verified in an experiment.…”

Section: Rotor Dynamicsmentioning

confidence: 99%

Review of Research in Japan on Electromagnetic Force Induced Vibration and Noise from an Electrical Motor

Shiohata

2013

JSDD

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An induction motor and synchronous motor are applied as a source of drive for machines such as power plants, home appliances and cars. Recently, electrical efficiency have been improved and mechanical structures have become lighter and smaller. As a result of these trends, mechanical vibration and noise are increasing. Vibration and noise caused by electromagnetic force must be reduced to provide a comfortable environment. To satisfy these needs, a system to simulate vibration and noise precisely and effectively at the mechanical design stage is needed. Such a simulation system would reduce the time needed for experimentation and reduce the length of development periods and costs of production.

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Section: Rotor Dynamicsmentioning

confidence: 99%

Review of Research in Japan on Electromagnetic Force Induced Vibration and Noise from an Electrical Motor

Shiohata

2013

JSDD

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“…Studies carried out on bending vibration of the rotors of induction motors include the analysis of unbalanced electromagnetic forces due to static eccentricity (Bradford, 1968), dynamic eccentricity (Belmans et al, 1987;Iwata and Sato, 1997;Yang et al, 1999a), effects of slot and skew (Dorell, 1996), and phase voltage unbalance (Kanzaki et al, 1994), etc. Those studies basically focus on experiments and analytical evaluation for electromagnetic forces, or consider only the condition of unstable vibrations for simple systems with one or two degrees of freedom.…”

Section: Introductionmentioning

confidence: 99%

Instability and Imbalance Response of Large Induction Motor Rotor by Unbalanced Magnetic Pull

Yang¹,

Kim²,

Son³

2004

Journal of Vibration and Control

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This paper deals with a general analytical method for analyzing the instability and mechanical imbalance response of induction motors considering unbalanced electromagnetic forces produced in the induction motors with rotor eccentricity and phase unbalance. The equations to be solved are a set of second-order differential equations that give matrices with periodic coefficients that are a function of time due to the unbalanced electromagnetic force. The evaluation method of rotor instability zones is presented by a time transfer matrix method. The Newmark β method is adapted to solve for an imbalance response. A practical application is given for a large induction motor. The results show that the proposed method is satisfactory.

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“…It is known that unstable vibration (2), (3) equal to the power supply frequency, vibration of twice the power supply frequency (4) , beat vibration concerning with slip ratio of rotation (5) etc., are generated regardless of the rotor unbalance, which are due to the magnetic factor of three-phase two-pole induction motor, offset between the stator center and a gyrational center of the rotor, imbalance of the stator magnetic force and unbalanced phase voltage. Studies exclude unstable vibrations have been reported where the vibration is simply explained by electromagnetic property of magnetic pull force between the stator and the rotor, however, it does not seem to be fully analyzed in rotordynamic aspects for the present rotor system.…”

Section: Introductionmentioning

confidence: 99%

Vibration of Induction Motor Rotor in Rotary Magnetic Field. Case of Two Poles Motor.

Iwata¹,

Sato²,

Komatsuzaki³

et al. 1999

Trans.JSME(C)

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The rotor vibration of two-pole induction motor with rotating magnetic field has been investigated. The vibration is measured at any relative location of the stator and the rotor with various power supply frequencies in the experiment and is analyzed in consideration of mechanical factors of the rotor. The following conclusion is obtained through the experiment and the analysis; (1) 2ω vibration of twice the power supply frequency ω is generated because of offset between the stator center and the gyrational center of the rotor. (2) Two vibrations of ω(1−s) and ω(1+s) where s is slip ratio are generated because of the rotor unbalance or the disagreement between the gyrational center and geometrical center of the rotor. (3) An unstable vibration is predicted in the analysis when the power supply frequency is equal to natural frequency of the rotor, however, the unstable vibration was not generated in the experiment because of the damping.3/24

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Unstable Electrical Vibration of an Induction Motor.

Cited by 8 publications

References 0 publications

Review of Research in Japan on Electromagnetic Force Induced Vibration and Noise from an Electrical Motor

Review of Research in Japan on Electromagnetic Force Induced Vibration and Noise from an Electrical Motor

Instability and Imbalance Response of Large Induction Motor Rotor by Unbalanced Magnetic Pull

Vibration of Induction Motor Rotor in Rotary Magnetic Field. Case of Two Poles Motor.

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