Abstract
Line start permanent magnet synchronous motors experience different types of failures, including static eccentricity. The first step in detecting such failures is the mathematical modeling of the motor under healthy and failed conditions. In this paper, an attempt to develop an accurate mathematical model for this motor under static eccentricity is presented. The model is based on the modified winding function method and coupled magnetic circuits approach. The model parameters are calculated directly from the motor winding layout and its geometry. Static eccentricity effects are considered in the motor inductances calculation. The performance of the line start permanent magnet synchronous motor using the developed mathematical model is investigated using MATLAB/SIMULINK® software (2013b, MathWorks, Natick, MA, USA) under healthy and static eccentricity condition for different loading values. A finite element method analysis is conducted to verify the mathematical model results, using the commercial JMAG® software (16.0.02n, JSOL Corporation, Tokyo, Japan). The results show a fine agreement between JMAG® and the developed mathematical model simulation results.
Highlights
Electrical motors play a major role in industrial sectors around the world
Various methods were presented in the literature for modeling and simulating eccentricity faults, the majority are based on the finite element analysis method or coupled magnetic circuit approach and the modified winding function method (MWFM)
In this paper, coupled magnetic circuit approach is used to represent the abc-Line-Start Permanent Magnet Synchronous (LSPMS) motor model under static eccentricity fault condition, while the MWFM is used for estimating the motor inductances
Summary
Electrical motors play a major role in industrial sectors around the world. They are the backbone of industry and manufacturing. Various methods were presented in the literature for modeling and simulating eccentricity faults, the majority are based on the finite element analysis method or coupled magnetic circuit approach and the modified winding function method (MWFM). The MWFM is widely introduced to simulate and model electrical motors both in healthy and under internal motor fault conditions in both synchronous and induction machines It is utilized for the first time in [22] for internal winding fault analysis, and in [23,24], for rotor faults. The authors in [28] present a new index for detecting the dynamic eccentricity, which is based on the modified winding function method in the round rotor synchronous motors This index is based on processing the developed torque using the time series data mining (TSDM) method.
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