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Ring magnet5/8/2023 ![]() ![]() There are different methods including linear model, two-segment linear model, exponential model etc. So, it is necessary to use the developed non-linear model for the B- H curve. Therefore, defining the B- H curve of the PM by remanent flux density B r and recoil permeability μ r is not accurate enough in the ID analysis. Therefore, in this paper, the developed approach for optimisation of the RWAFPM motor with a target of minimising the phenomenon of ID is presented.Ī crucial step for a detailed study of ID is the proper definition of the B- H curve of the PM, which describes the demagnetisation curve including the knee point. Therefore, the need to optimise and improve the structure of RWAFPM in terms of ID is evident. The results showed that the RWAFPM motor is severely vulnerable to ID at high temperatures. In Reference the effective parameters on the ID of the RWAFPM motor have been investigated and the modified Finite Element (FE) demagnetisation modelling method has been presented. Therefore, it is necessary to investigate the nature of this problem and give a solution for it. The ID phenomenon will lead to a reduction in the remnant flux density of the PM and in a consequence, motor performance characteristics such as power density and output torque of the motor will be weakened and the machine does not work in ideal design conditions. to reduce the torque ripple of the RWAFPM motor, the effect of grouping, Skewing, and magnet step-to-pole ratio is investigated and the torque profile of the motor is optimised. Although this structure has strengths including high power-torque density and high efficiency, it has disadvantages such as low filling factor, high torque ripple and severe irreversible demagnetisation (ID) at high temperatures. This structure was first introduced for use in ship propulsion, but it can also be used in traction applications and renewable energies. One of these recently introduced structures is the ring winding axial flux PM (RWAFPM) motor. An important aspect of the development of PM motors is the effort to provide new structures to improve their performance. Therefore, paying attention to the development and improvement of the performance of these types of electric machines is of great importance. In recent years, permanent magnet (PM) motors have been widely used in various industries due to their good performance characteristics such as high power-torque density, high efficiency, easy construction and high reliability. ![]() IET Generation, Transmission & Distribution.IET Electrical Systems in Transportation.IET Cyber-Physical Systems: Theory & Applications.IET Collaborative Intelligent Manufacturing.CAAI Transactions on Intelligence Technology. ![]()
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