NDLI: Magnetic-equivalent-circuit approach for inter-turn and demagnetisation faults analysis in surface mounted permanent-magnet synchronous machines using pole specific search-coil technique

Content Provider	IET Digital Library
Author	Naderi, Peyman
Abstract	Magnetic-equivalent-circuit model for surface mounted permanent-magnet synchronous machines in both healthy and faulty cases is presented in this study, where both saturation effect and space harmonics are considered. Pole numbers, magnets and slot numbers can be chosen arbitrarily in the proposed model, and the behavior of the machine can be studied under various kinds of faults by a single model. Demagnetization, as well as inter-turn short short-circuit faults of the stator windings, are modelled, and a fault detection method is proposed. It is shown that the demagnetization fault is not detectible by stator current analysis, therefore an additional pole specific coil is considered in this study as a search coil. For modelling, the differential equations representing the electrical part of the PMSM model are converted into an algebraic type using the well-known trapezoidal technique and are solved simultaneously together with the non-linear magnetic equations using the Newton-Raphson method. It is shown that the presented model in this study is capable of effective modelling of the healthy and faulty machine under mentioned faults by a single model, thus reducing the computational complexity of the model. The effectiveness of the proposed MEC model is verified using finite-element method via Maxwell software.
Starting Page	916
Ending Page	928
Page Count	13
ISSN	17518660
Volume Number	12
e-ISSN	17518679
Issue Number	Issue 7, Aug (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-epa/12/7
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-epa.2017.0403
Journal	IET Electric Power Applications
Publisher Date	2018-03-27
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Additional Pole Specific Coil Asynchronous Machine Control of Electric Power System Demagnetisation Fault Demagnetisation Fault Analysis Effective Modelling Equivalent Circuit Equivalent Circuit Approach Fault Detection Method Fault Diagnosis Faulty Cases Faulty Machine Finite Element Analysis Healthy Cases Healthy Machine Inter-turn Magnetic Circuit Magnetic-equivalent-circuit Model Magnets MEC Model Mentioned Fault Newton-Raphson Method Nonlinear Magnetic Equation Numerical Analysis Permanent Magnet Machine Permanent Magnet Motors Permanent-magnet Synchronous Machine PMSM Model Pole Numbers Pole Specific Search-coil Technique Rotors Saturable Machine Saturation Effect Search Coil Short-circuit Fault Single Model Slot Numbers Space Harmonics Stator Current Analysis Stators Synchronous Machine Synchronous Motors
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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