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Title: Magnet Coil Shorted Turn Detector

Abstract

The Magnet Coil Shorted Turn Detector has been developed to facilitate the location of shorted turns in magnet coils. Finding these shorted turns is necessary to determine failure modes that are a necessary step in developing future production techniques. Up to this point, coils with shorted turns had the insulation burned off without the fault having been located. This disassembly process destroyed any chance of being able to find the fault. In order to maintain a flux balance in a coupled system such as a magnet coil, the current in a shorted turn must be opposed to the incident current. If the direction of the current in each conductor can be measured relative to the incident current, then the exact location of the short can be determined. In this device, an AC voltage is applied to the magnet under test. A small hand held B-dot pickup coil monitors the magnetic field produced by current in the individual magnet conductors. The relative phase of this pickup coil voltage is compared to a reference signal derived from the input current to detect a current reversal as the B-dot pickup coil is swept over the conductors of the coil under test. This techniquemore » however, is limited to only those conductors that are accessible to the hand held probe.« less

Authors:
;
Publication Date:
Research Org.:
Fermi National Accelerator Lab., Batavia, IL (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10150414
Report Number(s):
FNAL-TM-1882
ON: DE94011746
DOE Contract Number:  
AC02-76CH03000
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Mar 1994
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; MAGNET COILS; MEASURING METHODS; MEASURING INSTRUMENTS; FAILURES; ACCELERATORS; 430303; EXPERIMENTAL FACILITIES AND EQUIPMENT

Citation Formats

Dinkel, J.A., and Biggs, J.E. Magnet Coil Shorted Turn Detector. United States: N. p., 1994. Web. doi:10.2172/10150414.
Dinkel, J.A., & Biggs, J.E. Magnet Coil Shorted Turn Detector. United States. doi:10.2172/10150414.
Dinkel, J.A., and Biggs, J.E. Tue . "Magnet Coil Shorted Turn Detector". United States. doi:10.2172/10150414. https://www.osti.gov/servlets/purl/10150414.
@article{osti_10150414,
title = {Magnet Coil Shorted Turn Detector},
author = {Dinkel, J.A. and Biggs, J.E.},
abstractNote = {The Magnet Coil Shorted Turn Detector has been developed to facilitate the location of shorted turns in magnet coils. Finding these shorted turns is necessary to determine failure modes that are a necessary step in developing future production techniques. Up to this point, coils with shorted turns had the insulation burned off without the fault having been located. This disassembly process destroyed any chance of being able to find the fault. In order to maintain a flux balance in a coupled system such as a magnet coil, the current in a shorted turn must be opposed to the incident current. If the direction of the current in each conductor can be measured relative to the incident current, then the exact location of the short can be determined. In this device, an AC voltage is applied to the magnet under test. A small hand held B-dot pickup coil monitors the magnetic field produced by current in the individual magnet conductors. The relative phase of this pickup coil voltage is compared to a reference signal derived from the input current to detect a current reversal as the B-dot pickup coil is swept over the conductors of the coil under test. This technique however, is limited to only those conductors that are accessible to the hand held probe.},
doi = {10.2172/10150414},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {3}
}

Technical Report:

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