Force Computation and Analysis of Single-Phase Capacitor-Start Induction Motors Using Finite Element Method at Broken Bars Conditions


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Abstract


This paper studies the effects of broken bars faults on the single-phase capacitor-start induction motor. A transient model for the motor is used in this study that depends on self and mutual inductance calculations based on accurate finite element method (FEM). The rotor broken bars faults are studied thoroughly including their effects on the rotor bar currents distribution, the rotor bar frequency content, the electromagnetic forces exerted on the rotor bars, the motor speed and motor torque. The electromagnetic tangential and radial forces affecting the rotor bars were calculated using finite element method (FEM). It was found that the non-uniform distribution of the rotor bar currents will lead to non-uniform radial forces affecting the bars. This will increase the mechanical stresses on the rotor shaft which may lead to eccentricity.
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Keywords


Broken Rotor Bars; Capacitor-Start Motors; Finite Element Method (FEM); Single-Phase Induction Motors

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References


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