Small axial flux motor with permanent magnet excitation and etched airgap winding

Author

Banitsch, R. ; Belman, R. ; Stephan, R.

Author_Institution

Tech. Univ. Berlin, Germany

Volume

30

Issue

2

fYear

1994

fDate

3/1/1994 12:00:00 AM

Firstpage

592

Lastpage

594

Abstract

Disc-type motors with sintered Nd-Fe-B magnets benefit from the high remanence and near-ideal loop shape of the hard magnetic material. Consequent advantages include a high torque for a given motor size and improved efficiency. Special airgap windings manufactured as multilayer etched windings contribute to flat package motors and to low torque harmonics. Different back iron designs were examined. For the operation of the brushless DC motor, instead of the classical Hall sensors, small magnetoresistive sensors can be used effectively for rotor position sensing

Keywords

DC motors; detectors; electric sensing devices; machine windings; magnetic flux; magnetoresistive devices; permanent magnet motors; position measurement; remanence; rotors; small electric machines; spark gaps; torque; back iron designs; brushless DC motor; disc-type motors; etched airgap winding; flat package motors; hard magnetic material; high remanence; high torque; low torque harmonics; magnetoresistive sensors; near-ideal loop shape; permanent magnet excitation; rotor position sensing; sintered Nd-Fe-B magnets; small axial flux motor; Brushless DC motors; DC motors; Etching; Magnetic materials; Magnetic sensors; Manufacturing; Permanent magnet motors; Remanence; Shape; Torque;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.312345

Filename

312345