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• W2953335564 endingPage "575" @default.
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• W2953335564 abstract "Stator current modeling for defective induction motor rolling bearings (IMRBs) based on magnetic equivalent circuits (MEC) is carried out. A dynamic model of rotor system supported by defective IMRBs is established to numerically obtain the non-uniform time-varying air gap length. MEC modeling of a induction motor (IM) is then conducted and a magnetic equivalent network is formed by connecting the flux tubes with nodes. After considering the nonlinear air gap permeance, nonlinear iron material and magnetic saturation, an iterative numerical integration method is proposed to solve the stator current model. Finite element analysis and dynamic tests on a typical IM are carried out for verification. Based on these, the fault characteristic frequencies in stator current spectra are, respectively, identified for outer race spall, inner race spall and ball spall. Fault-related frequencies are basically represented by the combinations between the passing frequency (outer race, inner race or ball), its harmonics and power supply frequency. Due to the modulation of rotor (or cage) rotation, higher harmonics of rotor frequency (or cage frequency) participate in the fault-related frequencies of the inner race (or ball) spall. Some fault-related frequencies, which might be more suitable for condition monitoring of induction motors, are recommended by comparing the slope of each spectral amplitude varying with spall width." @default.
• W2953335564 created "2019-06-27" @default.
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• W2953335564 date "2019-09-01" @default.
• W2953335564 modified "2023-10-06" @default.
• W2953335564 title "Stator current model for detecting rolling bearing faults in induction motors using magnetic equivalent circuits" @default.
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• W2953335564 doi "https://doi.org/10.1016/j.ymssp.2019.06.010" @default.
• W2953335564 hasPublicationYear "2019" @default.
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