The fault diagnosis of rotor bars in squirrel cage induction motors by time-stepping finite element method

Kim, Chang-Eob; Jung, Yong-Bae; Yoon, Sung Bum; Im, D.H.

doi:10.1109/20.582752

Cited by 27 publications

(2 citation statements)

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“…Other regions of the induction motor, such as end-windings and end-rings, can be modelled using lumped parameters. 2D FEM models of a faulty cage rotor are presented in [19,20] . The latest 2D FEM models of broken bars are studying the fault from different perspectives.…”

Section: Introductionmentioning

confidence: 99%

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Broken bar indicators for cage induction motors and their relationship with the number of consecutive broken bars

Martinez¹,

Belahcen²,

Arkkio³

2013

IET Electric Power Applications

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The study presents analysis of the broken bar induction machine, through numerical, analytical and experimental investigations. Numerical finite element analysis is carried out with a commercial software in which coupling between the windings circuit equations and equations of the magnetic field has been implemented and verified through intensive measurements. An analytical model has also been constructed to understand and explain the origin of different frequencies detected in the case of broken bars. The analytical model enabled prediction of frequencies, in a new manner, when the number of consecutive broken bars increases. The novelty of this study arises from derivation of an expression linking stator current harmonics (using the wave number of a broken cage), slip harmonic and saturation harmonic, which is closely related to the number of consecutive broken bars. The model also takes into account the speed ripple. This expression has been validated by both finite element model (FEM) and measurements on a 22 kW induction machine with healthy and faulty rotors.

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Section: Introductionmentioning

confidence: 99%

“…Γ ∈ ((n b + 1)/2)[ − ((2π)/(Z rt )), ((2π)/(Z rt ))]. The flux density wave(19), written in rotor coordinates, isb r sat (a, t) = s t + y (1 − s)v s t + a r(21)Substituting(21) into(20) and by integration, the induced voltage in the bars adjacent to the broken coil is 1 ba (t) = cos bv s 1 + y(1 − s) t…”

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confidence: 99%