Study of Demagnetization Risk in PM Machines

Almandoz, Gaizka; Gómez, Iratxo; Ugalde, Gaizka; Poza, Javier; Escalada, Ana Julia

doi:10.1109/tia.2019.2904459

Cited by 17 publications

(7 citation statements)

References 23 publications

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“…Also, in all cases, the intensity of the ID was not controllable, and they could not identify the exact moment at which the ID occurs. Therefore, in [107], a simple method was proposed for the online estimation of ID to overcome these issues. The requirements of the proposed method include a low-cost thermocouple placed in the housing of the machine and knowledge about the properties of the PMs.…”

Section: Experimental Analysismentioning

confidence: 99%

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The Demagnetization Phenomenon in PM Machines: Principles, Modeling, and Design Considerations

2023

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Permanent Magnet (PM) machines have attracted much attention due to their high powertorque density, high efficiency, high dynamic response performance, high power factor, and simple structure. Even though there are some uncertainties about their reliable chain supply, PM machines still are the first choice for high-performance applications. Therefore, paying attention to the development and improvement of the performance of these types of electric machines is of great importance. One of the challenges of the PM machines is their vulnerability to Irreversible Demagnetization (ID), especially for applications such as Electric Vehicles (EV), in which the working temperature and Magnetic Motive Force (MMF) produced by stator winding are higher than in conventional applications. Therefore, the ID phenomenon must be regarded as a leading design and control parameter for PM machine designers. The ID can be defined as an irreversible reduction of the remnant flux density of the PM or the EMF of the PM machine due to severe temperature conditions, high external Demagnetization Field (DF), or non-proper design of PM machines, resulting in degradation in performance of the PM machines. The lack of a good source that gives a deep inside into this phenomenon in designing and developing PM machines encourages the author to conduct a comprehensive literature review. For proper design of the PM machines in terms of ID, it is necessary to consider four critical steps, i.e.: (a) accurate non-linear modelling of the PM demagnetization curve, (b) analytical model taking into account local ID, (c) geometry optimization methods targeting ID, (d) accurate experimental testing to evaluate the ID fault-tolerant capability of the manufactured PM machines. In this paper, the above four aspects are surveyed exclusively, and the advantages and disadvantages of the existing methods in these areas are highlighted. Furthermore, design tips towards the design of ID fault-tolerant PM machines and other research opportunities to enhance the reliability of PMs machines are also presented.

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Section: Experimental Analysismentioning

confidence: 99%

“…The back-emf expression accounting for the working temperature of the PMs and ID can be defined as Eq. ( 25) [107].…”

Section: Experimental Analysismentioning

confidence: 99%

The Demagnetization Phenomenon in PM Machines: Principles, Modeling, and Design Considerations

2023

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“…Some of these simulations were performed to build a complete model, while others were performed to simulate a specific type of application. Examples of such virtual models can be found, e.g., in the case of electromagnetic systems, see for example [35][36][37][38].…”

Section: Computer Aided Design Of Emssmentioning

confidence: 99%

Coupled Models in Electromagnetic and Energy Conversion Systems from Smart Theories Paradigm to That of Complex Events: A Review

Razek

2022

Applied Sciences

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In this article, we evaluate the modeling of a real operation of a real system using the corresponding adequate theory. We show that the smart theories often used do not directly correspond to reality because these theories have been established in idealized frameworks. The need to adapt such frames to real landscape situations necessitates modifying the models used. This can be achieved by taking into account the different existing physical phenomena, which are normally overlooked in smart idealized models, in a revised coupled model. This contribution aims to analyze and illustrate the relationship between smart theories and coupled realistic models through a literature review. The strategy for constructing such models is discussed and highlighted. The understanding of this approach is illustrated by an application to the case of electromagnetic and energy conversion systems. In these systems, intelligent energy management, conversion and control involve the use of an accurate realistic coupled model in system design, optimization and control. It is a question of coupling and solving equations representing these systems by taking into account the real phenomena involved, which are electrical, magnetic, mechanical, thermal and material. The obvious advantage of using such realistic models in computer-aided design and optimization tools is illustrated. Moreover, the interest of using such models in the supervision of systems is assessed. These demonstrations are supported by a review of examples of work carried out in the field.

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“…To analyze the capability of anti-demagnetization of the ferrite-PMs in the DSHE-FS motor, the qaxis current is chosen as 30 A which is twice that of the rated one [24]. Figure 17(a) gives the field distributions of the ferrite-PM.…”

Section: Capability Of Anti-demagnetizationmentioning

confidence: 99%

Analysis and Optimization of Double-Side Hybrid Excitation Flux-Switching Motor

Chen¹,

Cai²,

Zhuang³

et al. 2020

PIER C

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In this paper, a double-side hybrid excitation flux-switching (DSHE-FS) motor employing a double stator structure with special multi-excitations is presented. The high space utilization improves the torque density and power density of DSHE-FS motor. The addition of non-rare-earth permanent magnet material reduces the consumption of rare-earth permanent magnet material. The double-side field windings enable the motor to have more flexible magnetic modulation properties. To investigate the principle of motor operation and flux regulation, the equivalent magnetic circuit method is employed. In order to achieve higher operation performances of the motor in different driving modes, the multi-objective optimization with coupled multi-physical field calculation is carried out. The multiphysical comprehensive sensitivity function is defined which couples the electromagnetic performance optimization objective and mechanical performance objective. Then multi-objective genetic algorithm (MOGA) method was used to find a feasible solution set. Response surface (RS) method and parameter scan method are used to further determine the five important dimensions. The electromagnetic characteristics of optimized DSHE-FS motor are evaluated and compared in detail. Moreover, the mechanical analysis is conducted for the cupped rotor of DSHE-FS motor to validate the operation security. Theoretical analysis and simulation results verify the rationality of the DSHE-FS motor and the proposed optimization design method.

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Study of Demagnetization Risk in PM Machines

Cited by 17 publications

References 23 publications

The Demagnetization Phenomenon in PM Machines: Principles, Modeling, and Design Considerations

The Demagnetization Phenomenon in PM Machines: Principles, Modeling, and Design Considerations

Coupled Models in Electromagnetic and Energy Conversion Systems from Smart Theories Paradigm to That of Complex Events: A Review

Analysis and Optimization of Double-Side Hybrid Excitation Flux-Switching Motor

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