Review of fault modeling methods for permanent magnet synchronous motors and their comparison

Usman, Adil; Joshi, Bhakti M.; Rajpurohit, Bharat Singh

doi:10.1109/demped.2017.8062347

Cited by 48 publications

(21 citation statements)

References 17 publications

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“…This method can penetrate the internal laws and physical nature of motor faults but requires quite a high accuracy of the motor model. Commonly used models include analytical mathematical models, magnetic equivalent circuit (MEC) models and digital simulation models, which were compared by Usman et al [34].…”

Section: Model-based Fault Diagnosis Methodsmentioning

confidence: 99%

Faults and Diagnosis Methods of Permanent Magnet Synchronous Motors: A Review

et al. 2019

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Permanent magnet synchronous motors (PMSM) have been used in a lot of industrial fields. In this paper, a review of faults and diagnosis methods of PMSM is presented. Firstly, the electrical, mechanical and magnetic faults of the permanent magnet synchronous motor are introduced. Next, common fault diagnosis methods, such as model-based fault diagnosis, different signal processing methods, and data-driven diagnostic algorithms are enumerated. The research summarized in this paper mainly includes fault performance, harmonic characteristics, different time-frequency analysis techniques, intelligent diagnosis algorithms proposed recently and so on.

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Section: Model-based Fault Diagnosis Methodsmentioning

confidence: 99%

Faults and Diagnosis Methods of Permanent Magnet Synchronous Motors: A Review

et al. 2019

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“…, is the flux linkage of a PM for phase A given in terms of rotor back-EMF in (2) and (3). Referring the assumptions of section III-A, the or EB under demagnetization fault effects are deduced from 16…”

Section: A Remodeling Of Ls and Bg In The Developed Hybrid Systemmentioning

confidence: 99%

“…Condition monitoring thus becomes vital in diagnosing the fault in its incipient state in order to avoid the prolonged failure of the complete system under subjected conditions. It has been earlier reported in [3] about the classification and modeling of faults related to the PM motors and further concluded on the methods to be adopted for different types of fault conditions. Conventional fault modeling methods such as Electrical Equivalent Circuit (EEC), Magnetic Equivalent Circuit (MEC) and Numerical Method (NM) based approaches are more prominently used for the diagnosis of faults in PM synchronous machines [4]- [6].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Classification of Stator Inter-Turn Fault and Demagnetization Effects in BLDC Motor Using Rotor Back-EMF and Radial Magnetic Flux Analysis

Usman

Rajpurohit

2020

IEEE Access

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This paper shall carry out unique study and investigation on the individual and combined effect of Stator Inter-turn Fault (SITF) and rotor demagnetization effects in a Surface Mounted Permanent Magnet (SPM)-type Brushless Direct Current (BLDC) motor. Comprehensive modeling of fault is accomplished using the well-established fault modeling techniques such as Electrical Equivalent Circuit (EEC), Magnetic Equivalent Circuit (MEC), Numerical Methods (NMs) and hybrid modeling-based approaches. The extensive study of SITF conditions using an Improved Winding Function Theory (IWFT) gives better analysis to winding inductance LS, under fault conditions, while modeling the demagnetization effects using MEC and NM based approaches gives more realistic magnetic field quantities. The outcomes obtained are further remodeled in the developed hybrid model of a BLDC motor to study the steady state performance of a machine in terms of rotor back-EMF, EB and radial magnetic flux density Bg. The characteristic performance accomplished through the hybrid model system possess better accuracy with less computational time and therefore finds suitability among efficient and fast diagnosis technique feasible for industrial applications. The significant detectable changes in EB and Bg under subjected fault conditions, assist in detection, identification and classification of faults in BLDC motor. By obtaining the similar outcome experimentally and under the load conditions, the proposed study on the classification of fault is validated.

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“…During the unfavorable environmental conditions, motors are subjected to physical and thermal stresses which results in fault [3]. The authors of this paper have earlier in paper [4] have classified the faults related to PM motors and further given an inference about the methods which are preferable for different types of fault conditions. Faults in BLDC motors are usually stator related faults which constrict to winding faults, while rotor related faults curtail to demagnetization or decrepit of PMs of the machine [5].…”

Section: Introductionmentioning

confidence: 99%

“…Similar work has been done by T.J.E Miller in [11] for modeling of fault using MMF diagrams, which again requires MEC based techniques. As already discussed by the authors in [4], the Numerical Methods (NMs) require high computation time but gives more accurate results than EEC and MEC based methods, these methods are therefore pervasive in industry in the field of fault diagnosis [12].…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Analysis of Demagnetization Faults in BLDC Motors Using Novel Hybrid Electrical Equivalent Circuit and Numerical Based Approach

Usman

Rajpurohit

2019

IEEE Access

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Brushless Direct Current (BLDC) motors are the type of Permanent Magnet Synchronous Motors (PMSMs) with trapezoidal back-EMF. Due to high proliferation of BLDC motors in industrial applications, these motors are extensively been operated for longer durations. During the continuous heavy operation, these motors are subjected to environmental, physical and thermal stresses which can lead to faults. Fault can be on the stator windings or on the Permanent Magnets (PMs) of the rotor of a machine, which can manifest into electrical quantities like currents and/or voltages, magnetic quantities like flux density and thermal characteristics of a machine. This paper shall explore in detail about the demagnetization fault in PMs of a BLDC motor. Modeling of a machine can be done through different available techniques such as Electrical Equivalent Circuit (EEC) based method or analytical method which accounts several assumptions in order to simplify the analysis. While the Numerical Methods (NM) such as Finite Element Method Magnetics (FEMM) gives more authoritative solutions. This paper aims to combine both these approaches and contribute by developing a novel Hybrid EEC-FEMM model for a closed loop BLDC motor drive using a Hysteresis Current Control (HCC) technique. The developed model is simulated both under healthy and faulty conditions. In order to simulate the effects of fault in the machine, demagnetization is introduced in the PM through various methods like change in magnetic coercivity, placement of broken magnets, partial demagnetization and lastly by replacement of a PM with a non-magnetic material which is an extreme case of demagnetization. The investigation on the machine performance through change in quantities like stator current, back-EMF, electromagnetic torque, mechanical speed and magnetic flux density is analyzed. Further using the Maxwell 2D tool, a Finite Element (FE) model of a BLDC motor is developed and its performance is examined under both healthy and demagnetization fault conditions. The experimental validation of demagnetization fault supports the inferences drawn from the simulation results. INDEX TERMS Brushless direct current (BLDC) motors, demagnetization, electrical equivalent circuit (EEC), finite element method (FEM), hysteresis current control (HCC), numerical method (NM), permanent magnet (PM), permanent magnet synchronous motors (PMSMs).

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Review of fault modeling methods for permanent magnet synchronous motors and their comparison

Cited by 48 publications

References 17 publications

Faults and Diagnosis Methods of Permanent Magnet Synchronous Motors: A Review

Faults and Diagnosis Methods of Permanent Magnet Synchronous Motors: A Review

Modeling and Classification of Stator Inter-Turn Fault and Demagnetization Effects in BLDC Motor Using Rotor Back-EMF and Radial Magnetic Flux Analysis

Comprehensive Analysis of Demagnetization Faults in BLDC Motors Using Novel Hybrid Electrical Equivalent Circuit and Numerical Based Approach

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