Open AccessFEM Analysis of Brushless DC Servomotor with Fractional Number of Slots per Pole
Author(s) -
G. Baluta,
Adrian Graur,
Radu Dumitru Pentiuc,
Cristian I. Diaconescu,
Cezar Popa
Publication year - 2014
Publication title -
advances in electrical and computer engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 23
eISSN - 1844-7600
pISSN - 1582-7445
DOI - 10.4316/aece.2014.01016
Subject(s) - finite element method , servomotor , control theory (sociology) , dc motor , mathematics , computer science , electrical engineering , topology (electrical circuits) , structural engineering , engineering , artificial intelligence , control (management)
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