Thrust simulation of a linear oscillatory actuator

Author

Takano, Yutaka ; Yaezaki, Shoji ; Matsumoto, Koji ; Nishizawa, Naotake ; Yamada, Hajime

Author_Institution

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

Volume

33

Issue

2

fYear

1997

fDate

3/1/1997 12:00:00 AM

Firstpage

2085

Lastpage

2088

Abstract

This paper describes thrust simulations using the finite element method (FEM) for two types of linear oscillatory actuators (LOAs) to be used as a linear pulsator in a milking machine. The LOAs are cylindrical and have a moving core which is driven at low frequencies in the range of 0.6-1.2 Hz. The first one of the LOAs (named LOA-94) has a maximum thrust of 8.2 newtons and the simulation results approximately coincide with the measured values in the displacement range of ±2 mm. The second one (named LOA-95) has a maximum thrust of 8.9 newtons and the simulation results agreed with the measured values within the error of 25 % at the displacement of x=-0.5 mm. In comparison of the stroke-load characteristics between two LOAs, the second actuator (LOA-95) is more stable than that of first actuator (LOA-94) with respect to change in the load

Keywords

dairying; electric actuators; finite element analysis; linear machines; magnetic cores; oscillations; 0.6 to 1.2 Hz; FEM; finite element method; linear oscillatory actuator; linear pulsator; milking machine; moving core; stroke-load characteristics; thrust simulation; Coils; Displacement measurement; Finite element methods; Frequency measurement; Hydraulic actuators; Machinery; Magnetic cores; Magnetic flux; Orifices; Permanent magnets;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.582729

Filename

582729