Determination of the Closing Time of a Solenoid Actuated Mechanism

[+] Author and Article Information
J. R. Baumgarten

National Cash Register Company, Dayton, Ohio

J. Eng. Ind 84(4), 423-427 (Nov 01, 1962) (5 pages) doi:10.1115/1.3667532 History: Received July 28, 1961; Online December 09, 2011


Determination of the response time of a solenoid actuated mechanism is complicated by the fact that coil inductance varies with plunger position. In addition, the mechanical force developed by the solenoid is a function of the transient current in the circuit. The mechanism being actuated can introduce further nonlinearities in the displacement-time relationship of the plunger travel. This paper sets forth the dynamic relations governing this electromechanical system. A program utilizing the measured magnetization characteristics of the solenoid and a numerical integration technique has been mechanized on a digital computer. The effects of variation of certain design parameters on the response of the mechanisms are shown.

Copyright © 1962 by ASME
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