Transformer current sensor for superconducting magnetic coils
Abstract
A transformer current sensor having primary turns carrying a primary current for a superconducting coil and secondary turns only partially arranged within the primary turns. The secondary turns include an active winding disposed within the primary turns and a dummy winding which is not disposed in the primary turns and so does not experience a magnetic field due to a flow of current in the primary turns. The active and dummy windings are wound in opposite directions or connected in series-bucking relationship, and are exposed to the same ambient magnetic field. Voltages which might otherwise develop in the active and dummy windings due to ambient magnetic fields thus cancel out. The resultant voltage is purely indicative of the rate of change of current flowing in the primary turns.
- Inventors:
-
- Oak Ridge, TN
- Norris, TN
- Issue Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- OSTI Identifier:
- 866509
- Patent Number(s):
- 4727316
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01F - MAGNETS
- DOE Contract Number:
- W-7405-ENG-26
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- transformer; current; sensor; superconducting; magnetic; coils; primary; carrying; coil; secondary; partially; arranged; active; winding; disposed; dummy; experience; field; due; flow; windings; wound; opposite; directions; connected; series-bucking; relationship; exposed; ambient; voltages; otherwise; fields; cancel; resultant; voltage; purely; indicative; rate; change; flowing; ambient magnetic; magnetic coil; opposite direction; superconducting magnet; superconducting coil; opposite directions; magnetic field; magnetic fields; current flow; current flowing; superconducting magnetic; current sensor; field due; winding disposed; transformer current; /324/336/
Citation Formats
Shen, Stewart S, and Wilson, C Thomas. Transformer current sensor for superconducting magnetic coils. United States: N. p., 1988.
Web.
Shen, Stewart S, & Wilson, C Thomas. Transformer current sensor for superconducting magnetic coils. United States.
Shen, Stewart S, and Wilson, C Thomas. Fri .
"Transformer current sensor for superconducting magnetic coils". United States. https://www.osti.gov/servlets/purl/866509.
@article{osti_866509,
title = {Transformer current sensor for superconducting magnetic coils},
author = {Shen, Stewart S and Wilson, C Thomas},
abstractNote = {A transformer current sensor having primary turns carrying a primary current for a superconducting coil and secondary turns only partially arranged within the primary turns. The secondary turns include an active winding disposed within the primary turns and a dummy winding which is not disposed in the primary turns and so does not experience a magnetic field due to a flow of current in the primary turns. The active and dummy windings are wound in opposite directions or connected in series-bucking relationship, and are exposed to the same ambient magnetic field. Voltages which might otherwise develop in the active and dummy windings due to ambient magnetic fields thus cancel out. The resultant voltage is purely indicative of the rate of change of current flowing in the primary turns.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 1988},
month = {Fri Jan 01 00:00:00 EST 1988}
}