FERRITE_BEAD_CURRENT_TRANSFORMER

Published:2009/7/9 23:01:00 Author:May | From:SeekIC

No. 27 ferrite bead (Ferronics 11-122-B) wound with 25 turns No. 30 enameled wire and shunted by 50-ohm1/4-W resistor, gives low-cost transformer that can be used in range of 3 kHz to 30 MHz. Current-conversion ratio is 1 V/A into 50-ohm coaxial-cable termination, with excellent linearity from milliamperes up into amperes. Wire carrying current to be measured is passed once through core, to serve as singleturn primary of transformer.-M. Salvati, Ferrite Bead Makes Cheap Current Transformer, EDN Magazine, March 20, 1974, p 85.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Communication_Circuit/FERRITE_BEAD_CURRENT_TRANSFORMER.html

Print this Page | Comments | Reading(3)