NDLI: Theory of magneto-mechanical systems as applied to telephone receivers and similar structures

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Theory of magneto-mechanical systems as applied to telephone receivers and similar structures

Content Provider	IEEE Xplore Digital Library
Author	Wegel, R. L.
Copyright Year	1920
Abstract	A sufficiently general theory of magnetic vibratory apparatus is deduced to cover all practical problems in the operation of the various types of telephone receivers as transformers of electrical into acoustical or acoustical into electrical energy. A set of linear equations is derived relating currents in windings, mounted either on a stationary support (pole piece) or on the moving part (diaphragm or armature), and the motion of the moving part. The effect of eddy currents is included by treating each eddy circulation as a circuit. From the equations derived, it is possible by simple algebraic processes to calculate the effect of eddy currents and diaphragm or armature motion in terms of the constants or impedances of the system. By making certain constants of the equations either infinite or zero the different receiver types are represented including (1) simple receiver without eddy currents, (2) receiver with eddy currents in the pole pieces, (8) receiver with eddy currents in the diaphragm, (4) receiver with eddy currents in both pole pieces and diaphragm, (5) receiver with the driving coil on the diaphragm, and (6) receiver with non-magnetic but conducting diaphragm.
Starting Page	791
Ending Page	802
Page Count	12
File Size	2436293
File Format	PDF
ISSN	03606449
Volume Number	40
Issue Number	10
Language	English
Publisher	American Institute of Electrical Engineers
Publisher Date	1921-01-01
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Force Equations Impedance Receivers Coils Magnetomechanical effects Magnetic circuits
Content Type	Text
Resource Type	Article

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