Document Type : Original Article
Authors
1 Department of Electrical Engineering, Sharif University of Technology, Tehran; ah.kooshki@ee.sharif.edu
2 Department of Electrical Engineering, Sharif University of Technology
Abstract
Coreless Permanent Magnet (CPM) machines are increasingly used in many industrial applications, such as automotive and aerospace applications, wind turbines, medical equipment, robotics, servo drives, and so on. In coreless permanent magnet DC machines, the rotor has a coreless winding structure and due to the absence of an iron core, the permanent magnet plays a significant role in these machines. Also, the shaft’s material can change the flux distribution and is another effective parameter on machine performance. Thus, in this paper, a typical coreless PMDC brushed machine is simulated and the effects of magnetization direction and the amount of the residual flux density of permanent magnet, and also the influence of ferromagnetic and non-ferromagnetic material of the shaft on machine performance, are studied and analyzed through three-dimensional finite element analysis. The results show that using a ferromagnetic shaft with a diametrical magnetized permanent magnet can improve the machine's performance in motor mode.
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Main Subjects
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