Cylindrical Cam Electromagnetic Vibration Damper Utilizing Negative Shunt Resistance

Two common problems in utilizing electromagnetic dampers are addressed in this article. The first problem is the maximum available damping that can be created in an electromagnetic actuator using a positive resistive load. Maximum damping is achieved when the motor terminals are placed in a short ci...

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Bibliographic Details
Published inIEEE/ASME transactions on mechatronics Vol. 25; no. 2; pp. 996 - 1004
Main Authors Kamali, Seyed Hossein, Miri, Mohammad Hossein, Moallem, Mehrdad, Arzanpour, Siamak
Format Journal Article
LanguageEnglish
Published New York IEEE 01.04.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Active vibration control
Actuators
Bicycles
Coils
cylindrical cam
Damping
DC motors
electromagnetic (EM) damping
Electromagnetics
motion converter
negative resistance
power electronics control
regenerative damping
Resistance
Shock absorbers
Short circuits
Shunt resistance
Translational motion
Vibration isolators
Vibrations
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Summary:Two common problems in utilizing electromagnetic dampers are addressed in this article. The first problem is the maximum available damping that can be created in an electromagnetic actuator using a positive resistive load. Maximum damping is achieved when the motor terminals are placed in a short circuit configuration, but it might not be enough in certain applications. As a solution, a method to produce negative resistance using power electronics and control techniques is presented in this article. The negative resistance cancels part of the resistance of the electromagnetic machine, which leads to producing larger electrical current in the actuator coils. As a result, higher damping levels are generated. The other contribution of this article is devising an effective motion rectification mechanism for converting the translational motion into rotary motion that drives an electric machine. To this end, a cylindrical cam mechanism is proposed which can provide longer strokes while keeping the geometry and size of the damper similar to the axial dampers used in automotive and bicycle dampers. The mechanism shows longer values for the ratio of stroke to maximum length compared to other designs reported in the literature.
ISSN:1083-4435
1941-014X
DOI:10.1109/TMECH.2019.2959523