The Effect of Core Materials on Magnetic Amplifier Circuits
Abstract
A series of new type, fast-response, magnetic amplifier circuits were recently developed at the Naval Research Laboratory as a direct result of a new theoretical approach to the magnetic amplifier problem. This type of amplifier was used to demonstrate the effects of core materials. The operation of the new circuits depends upon the ability of the magnetic core material to remain at any given flux-density level, up to saturation in the absence of an applied mmf. Many core materials, which are generally considered superior for use in convention magnetic circuits, do have the property of remaining at or near any existing flux level when applied mmf's are removed. However, one core material which is considered superior for use in magnetic amplifier circuits will not remain at an arbitrarily chosen flux level (saturation and below) in absence of an applied mmf. For this reason, this and similar core materials are theoretically inappropriate for use in the new type magnetic amplifier circuits and are found to exhibit relatively poorer performance. This paper demonstrates experimentally the magnetic characteristics which commercially produced core materials exhibit during their use in magnetic amplifiers. In addition, the effect and relative importance of rectifier leakage upon the operation of the new type circuits is observed when core materials having different loop widths are used and compared.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 27, 1952
- Accession Number
- AD1216676
Entities
People
- Leo J. Johnson
Organizations
- United States Naval Research Laboratory