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A conceptual design of a 3000 kVA high-temperature superconducting (HTS) transformer with split types of windings for locomotives is developed in this paper. The primary winding of it has four coils which are arranged on two core limbs respectively and connected in parallel, so the branch currents are probably not equal to each other. In this paper, on the basis of the 3-D magnetic field analysis...
In a high-temperature superconducting (HTS) transformer leakage magnetic field, especially its radial component, decreases the critical current and increases the ac losses in the tapes. Because of zero resistance of HTS tapes a slight unbalance among the branch inductances of the windings may result in heavy circulating current, however, an accurate calculation of it must depend on the magnetic field...
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