Magnetic Properties of Compressed Powdered Iron
- 1 January 1921
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Transactions of the American Institute of Electrical Engineers
- Vol. XL (00963860), 1321-1359
- https://doi.org/10.1109/t-aiee.1921.5060746
Abstract
This paper describes a new magnetic material which is peculiarly suited to the construction of cores in small inductance coils and transformers such as are used in a telephone plant. The requirements which were to be met involved a core material which should have a constant permeability, a small hysteresis loss, and a small eddy current loss within the range of magnetizing forces and frequencies which are met in telephonic operation. The material which was developed to meet these requirements is formed by fine grains of powdered iron, insulated and compressed. There is described the circumstances and experiments which led to this development and also the method of commercial production. Tables and curves are given showing the magnetic, electrical, and mechanical properties of the material.Keywords
This publication has 8 references indexed in Scilit:
- Carrier Current Telephony and TelegraphyTransactions of the American Institute of Electrical Engineers, 1921
- Hysteresis Effects with Varying Superposed Magnetizing ForcesTransactions of the American Institute of Electrical Engineers, 1921
- The Commercial Loading of Telephone Circuits in the Bell SystemTransactions of the American Institute of Electrical Engineers, 1911
- On the Permeability and the Retentiveness of a Mass of Fine Iron ParticlesProceedings of the American Academy of Arts and Sciences, 1906
- Die Energieverhältnisse in oszillatorischen magnetischen KreisenAnnalen der Physik, 1903
- Einige Versuche über Magnetisierung durch schnelle SchwingungenAnnalen der Physik, 1903
- Note on a magnetic detector of electric waves, which can be employed as a receiver for space telegraphyProceedings of the Royal Society of London, 1902
- I. A magnetic detector of electrical waves and some of its applicationsPhilosophical Transactions of the Royal Society A, 1897