Speed Control With Low Armature Loss for Very Small Sensorless Brushed DC Motors

Author

Scott, Jonathan ; McLeish, John ; Round, W.H.

Author_Institution

Dept. of Electron. Eng., The Univ. of Waikato, Hamilton

Volume

56

Issue

4

fYear

2009

fDate

4/1/2009 12:00:00 AM

Firstpage

1223

Lastpage

1229

Abstract

A method for speed control of brushed dc motors is presented. It is particularly applicable to motors with armatures of less than 1 cm³. Motors with very small armatures are difficult to control using the usual pulsewidth-modulation (PWM) approach and are apt to overheat if so driven. The technique regulates speed via the back electromotive force but does not require current-discontinuous drives. Armature heating in small motors under PWM drive is explained and quantified. The method is verified through simulation and measurement. Control is improved, and armature losses are minimized. The method can expect to find application in miniature mechatronic equipment.

Keywords

DC motor drives; machine control; micromotors; permanent magnet motors; variable speed drives; velocity control; armature heating; armature loss; back electromotive force; current-discontinuous drives; permanent magnet motors; pulsewidth-modulation drive; small sensorless brushed DC motors; speed control; variable speed drives; DC motor drives; micromotors; permanent magnet (PM) motors; pulsewidth modulation (PWM); rotating machine stability; variable-speed drives;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/TIE.2008.2007046

Filename

4663813