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FEM Analysis of Brushless DC Servomotor with Fractional Number of Slots per PoleBALUTA, G. , GRAUR, A. , PENTIUC, R. , DIACONESCU, C. , POPA, C.
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permanent magnet motors, brushless motors, finite element methods
permanent(10), magnet(10), machines(10), brush(10), fractional(7), slot(6), motor(6), rotor(5), pole(5), motors(5)
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About this article
Date of Publication: 2014-02-28
Volume 14, Issue 1, Year 2014, On page(s): 103 - 108
ISSN: 1582-7445, e-ISSN: 1844-7600
Digital Object Identifier: 10.4316/AECE.2014.01016
Web of Science Accession Number: 000332062300016
SCOPUS ID: 84894629787
The authors present in this paper the analysis with Finite Element Method (FEM) of the magnetic circuit for a Brushless DC servomotor with fractional number of slots/pole (9 slots and 10 poles). For this purpose, FEMM 4.2 software package was used for the analysis. To obtain the waveforms of Back-ElectroMotive Forces (BEMFs), electromagnetic and cogging torque for servomotor a program in LUA scripting language (integrated into interactive shell of FEMM4.2) has been created. A comparation with a structure with integer number of slots/pole (18 slots and 6 poles) was also realized. The analysis results prove that the structure chosen is an optimal solution: sinusoidal waveforms of BEMFs, improved electromagnetic torque and reduced cogging torque. Therefore, the operating characteristics of the servomotor with 9/10 slots/poles manufactured by Sistem Euroteh Company and included in an integrated electrical drives system are presented in this paper.
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