An examination for increasing the motor constant of a cylindrical moving magnet-type linear actuator

Author

Mizuno, Tsutomu ; Kawai, Masanori ; Tsuchiya, Fumiaki ; Kosugi, Masashi ; Yamada, Hajime

Author_Institution

Fac. of Eng., Shinshu Univ., Nagano, Japan

Volume

41

Issue

10

fYear

2005

Firstpage

3976

Lastpage

3978

Abstract

This paper describes the motor constant of a cylindrical moving magnet-type linear actuator for obtaining high response characteristics. The theoretical expression of motor constant square density G is deduced using the permeance method. A prototype linear actuator is designed in both permeance method and the finite element method. Measured motor constant and motor constant square density of the prototype linear actuator are 17.1 N²/(Wm³) and 2.6×10⁶N²/(Wm³) respectively, where these values are over twice as large as those of conventional linear motors.

Keywords

electromagnetic actuators; finite element analysis; linear motors; magnetic flux; cylindrical moving magnet; finite element method; linear actuator; linear motors; motor constant; permeance method; Coils; Equivalent circuits; Finite element methods; Hydraulic actuators; Magnetic flux; Permanent magnet motors; Permanent magnets; Permeability; Prototypes; Saturation magnetization; Finite element method (FEM); linear actuator; motor constant; motor constant square density; permanent magnet; permeance method;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2005.855160

Filename

1519507