EXPERIMENTAL SUPERCONDUCTING TRANSFORMER FOR CURRENT STEP-UP.
F. Voelker, Robert C. Acker · CERN Document Server (European Organization for Nuclear Research) · 1970
For certain applications one would like to use relatively few turns of a high current conductor to make superconducting magnets.High current conductors introduce the problem of large heat leaks, and also the problem of a high current power supply.These problems would be simplified if one could make a suitable current step-up transformer.A design equation for such a transformer is presented.An experimental test was performed on a transformer made of superconducting solenoids which we had on hand.It had a primary current of 79.2 A, and supplied 670 A to a small load solenoid.The transformer was operated in two modes.In the first, the primary current was held constant for 24 hours.The magnetic field in the load solenoid was monitored and the rate of decay in field could be measured.In the second mode, the primary current was regulated to maintain constant field in the load solenoid.The time constant of the secondary circuit was 1.4 x 10 6 seconds.Such a system could be operated for a number of weeks without recycling.