Investigação do Torque de Relutância em um Motor BLDC utilizando o Método da Permeabilidade Fixa e Entreferro Equivalente (Investigation of Reluctance Torque in a BLDC Motor using Frozen Permeability Method and Equivalent Air-gap Analysis)

Geyverson Teixeira Paula (geyverson@gmail.com)1, José Roberto Boffino Almeida Monteiro (jrm@sc.usp.br)1, Thales Eugenio Portes Almeida (thales.eugenio.almeida@usp.br)1, Marcelo Patrício Santana (marceloengenheiroe@usp.br)1, William Cesar Andrade Pereira (william.andrade@usp.br)1, Manoel Luís Aguiar (aguiar@sc.usp.br)1


1Universidade de São Paulo

This paper appears in: Revista IEEE América Latina

Publication Date: Aug. 2016
Volume: 14,   Issue: 8 
ISSN: 1548-0992


Abstract:
This work investigates the reluctance torque in a surface mounted Brushless DC motor (BLDC) regarding the saturation effects due to the increase of electric load. At first, the reluctance torque is evaluated considering the line inductance waveforms for three different electromagnetic load conditions. Based on these results, which show an impressive change on the behavior of reluctance torque due to electromagnetic saturation, a further investigation is carried out in order to clarify the role played by each tooth in the reluctance torque, and of course, in the line inductance waveforms. These investigations are carried out with the aid of Frozen Permeability Method and the Equivalent Air-gap Analysis.

Index Terms:
Brushless DC Motor, Electromagnetic Saturation, Frozen Permeability Method, Line Inductance, Reluctance Torque   


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