Investigation on Torque Characteristic and PM Operation Point of Flux-Intensifying PM Motor Considering Low-Speed Operation

Wang, Tianyu; Zhu, Xiaoyong; Zheng, Shiyue; Quan, Li; Xiang, Zixuan; Zhou, Xue Feng

doi:10.1109/tmag.2020.3019299

Cited by 14 publications

(3 citation statements)

References 12 publications

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“…In [91], the idea of a reverse saliency ratio (L d > L q ) was used to improve the field weakening conditions of PM motors, which will lead to an improvement in the ID condition. The applied changes to provide the condition of L d > L q is shown in Fig.…”

Section: Optimizing the Structure Of The Magnetic Circuit To Protect ...mentioning

confidence: 99%

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: Optimizing the Structure Of The Magnetic Circuit To Protect ...mentioning

confidence: 99%

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

2023

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“…In Ref. [13], the idea of a reverse saliency ratio ( L d > L q ) was used to improve the field weakening conditions of IPM motors, which will lead to an improvement in the ID condition. In Ref.…”

Section: Introductionmentioning

confidence: 99%

Demagnetisation optimisation of ring winding axial flux permanent magnet motor by modifying the load line of the magnet

Mahmouditabar

Vahedi

Takorabet³

2023

IET Electric Power Appl

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Recently the new topologies of the permanent magnet (PM) motor attract a lot of attention. These newly introduced PM motors are not mature in design aspects and suffer from different perspectives. Therefore, it is necessary to develop a common design procedure to overcome these drawbacks. One of the common problems with newly introduced PM motors is the phenomenon of irreversible demagnetisation (ID) at high temperatures. So, a solution to this problem will be presented. The recently introduced ring winding axial flux PM (RWAFPM) motor is considered as a case study. First, a modified approach for modelling ID is introduced. Then, the effect of rotor geometry parameters on the ID of the RWAFPM motor is discussed. Finally, developed multi-level multi-objective design optimisation considering ID is presented based on the developed Taguchi method.

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“…For low‐speed operation of electric vehicles, FI‐IPMSM is designed 15 . Response surface method is used to optimize machine performance and improve output torque capability compared to conventional IPMSM.…”

Section: Introductionmentioning

confidence: 99%

A comparison between conventional and flux‐intensifying interior permanent magnet synchronous machines

Shehata

2021

Int Trans Electr Energ Syst

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Summary Flux intensifying interior permanent magnet synchronous machine (FI‐IPMSM) was designed to improve the characteristic of conventional permanent magnet machine, especially, in field weakening region. Increasing a saliency ratio is the main method to achieve this target which leads to increasing reluctance torque than magnetic torque and so improving the machine performance. In this paper, the characteristics of FI‐IPMSM are investigated. The effect of PM material, PM width, PM thickness, flux barriers width, and iron bridge thickness on the machine parameters is studied. Machine inductances, no‐load and full‐load characteristics are analyzed. A comparison is carried out between the FI‐IPMSM and conventional IPMSM to evaluate the improvement in machine performance. Two‐dimensional time‐steeping finite element method (FEM) is employed in analysis of the FI‐IPMSM and conventional IPMSM.

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Investigation on Torque Characteristic and PM Operation Point of Flux-Intensifying PM Motor Considering Low-Speed Operation

Cited by 14 publications

References 12 publications

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

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

Demagnetisation optimisation of ring winding axial flux permanent magnet motor by modifying the load line of the magnet

A comparison between conventional and flux‐intensifying interior permanent magnet synchronous machines

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