
Accession Number : AD0607707
Title : A MATHEMATICAL MODEL FOR A DRY POWDERED MAGNETIC CLUTCH.
Descriptive Note : Final rept.,
Corporate Author : TRW SPACE TECHNOLOGY LABS LOS ANGELES CALIF
Personal Author(s) : Blackburn,E. P.
Report Date : JUL 1960
Pagination or Media Count : 86
Abstract : A mathematical model was developed for a magnetic clutch. The clutch is an electromechanical device designed to transmit a torque which can be modulated with an electric current. Torque is transmitted through a dry, ferrous powder located between the input and output members. The action of this powder is controlled by a magnetic field. Clutches of this type are produced commercially by Lear, Inc. A physical explanation of the torqueproducing mechanism was given, and the output torque was defined in terms of the total flux passing through the powder. The flux produced by a signal current to the clutch is affected by eddy currents, hysteresis and by the the nonconstant permeability of the ferrous powder. The eddy current effect can be described by the diffusion equation, and the hysteresis effect by a describing function. The nonconstant permeability of the powder is essentially a dynamic effect and is evaluated from the experimental data. Experimental data was given for the clutch, and the correlation between the analytical model and this data was shown. (Author)
Descriptors : (*CLUTCHES, MATHEMATICAL MODELS), (*MATHEMATICAL MODELS, CLUTCHES), OPERATION, TORQUE, EQUATIONS, SYNCHROS, IRON, POWDER METALS, SIMULATION, FEEDBACK, CONTROL SYSTEMS
Distribution Statement : APPROVED FOR PUBLIC RELEASE