Model of the commutation phenomena in a universal motor

Author

Gerlando, Antonio Di ; Perini, Roberto

Author_Institution

Dipt. di Elettrotecnica, Politecnico di Milano, Italy

Volume

21

Issue

1

fYear

2006

fDate

3/1/2006 12:00:00 AM

Firstpage

27

Lastpage

33

Abstract

An equivalent electrical circuit, characterized by the minimum coil sections number necessary to analyze the commutation in a universal motor, is discovered. The model parameters are also determined: in particular, the self and mutual inductance coefficients and the electromotive force induced in the coil sections (taking into account the magnetic saturation), the brush-commutator voltage drop, the electric arc. By means of a numerical solution of the equivalent circuit, the current waveforms are analyzed; the comparison between the computed and measured waveforms of the brush-commutator voltage drops allows to verify the model.

Keywords

arcs (electric); brushes; coils; commutation; electric motors; equivalent circuits; numerical analysis; brush-commutator voltage drop; coil sections; commutation phenomena; current waveforms; electric arcs; electromotive force; equivalent electrical circuit; magnetic saturation; minimum coil sections; model parameters; universal motor; Circuit analysis computing; Coils; Commutation; Current measurement; Equivalent circuits; Inductance; Magnetic analysis; Saturation magnetization; Universal motors; Voltage; Commutation; equivalent circuit; universal motor;

fLanguage

English

Journal_Title

Energy Conversion, IEEE Transactions on

Publisher

ieee

ISSN

0885-8969

Type

jour

DOI

10.1109/TEC.2004.841514

Filename

1597317