Dynamic Analysis of Linear Resonant Actuator Driven by DC Motor Taking into Account Contact Resistance Between Brush and Commutator

This paper describes a highly accurate computation technique to obtain the dynamic characteristics of a linear resonant actuator (LRA) driven by the dc brush motor and a magnetic conversion mechanism employing the 3-D finite-element method. In this calculation, the contact resistance between brush a...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2008-06, Vol.44 (6), p.1510-1513
Main Authors: Yamaguchi, T., Kawase, Y., Suzuki, S., Hirata, K., Ota, T., Hasegawa, Y.
Format: Article
Language:English
Subjects:
Actuators
Brushes
Commutation
Commutators
Contact resistance
coupled analysis method
Cross-disciplinary physics: materials science
rheology
D C motors
DC motors
Dynamic characteristics
Equations
Exact sciences and technology
Finite element methods
Hydraulic actuators
linear resonant actuator (LRA)
Magnetic analysis
Magnetic field measurement
Magnetic resonance
Magnetism
Materials science
Mathematical analysis
Motors
Other topics in materials science
Physics
three-dimensional finite-element method
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Description
Summary:This paper describes a highly accurate computation technique to obtain the dynamic characteristics of a linear resonant actuator (LRA) driven by the dc brush motor and a magnetic conversion mechanism employing the 3-D finite-element method. In this calculation, the contact resistance between brush and commutator of the dc brush motor is taken into consideration in the electric circuit equation coupled with magnetic field equation. The influences of the contact resistance on the dynamic characteristics are quantitatively investigated, and the importance of the use of appropriate contact resistance is clarified through the comparison with the measurement.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2007.916702