Author:
Barzegari Bafghi Mohammad Hussein,Vahedi Abolfazl,Mohammad-Alikhani Arta
Abstract
Abstract
A flux-switching motor is a synchronous electric motor in which both field and armature coils are placed on the stator. There are thus three different stator structure types with regard to field excitation: permanent magnet, direct current field excitation, and hybrid. The rotor structure of the motor in this study reflected two types: integrated and multi-piece structure. The permanent magnet flux switching motor with integrated rotor structure offers more advantages and more attention has been paid to this as compared to other electric motors in various industries. The major advantages of this type are high torque density, ease of manufacture, high reliability, and robustness of rotor. However, these flux switching motors have relatively high cogging torque, and while work has been done on reducing the cogging torque and some literature published, most such works have focused on modifying the rotor tooth, skewing the rotor. These works study the effect of rotor shaping on motor performance, while in this paper, new rotor shapes are also considered. Finally, a method is introduced to minimise the cogging torque that has least adverse effect on other effective parameters such as torque density. Using the results of other papers, the finite element method is used to find the best method of rotor shaping in this paper.
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