Abstract
The main problem in the design and operation of electric machines with a superconducting excitation winding on the rotor is the energy transfer from stator by brush unit. To solve the problem, a method of contactless power supply of the coils on the rotor was proposed. It consists in using a ring transformer with air gap and a rectifier on the cryogenic rotor. The results of the experiment with the diode cooled by LN2 and the simulation of the power supply circuit are presented.
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