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The critical current (Ic) of epoxy impregnated YBCO coil is prone to degrade due to the cumulative radial tensile stress. Winding tension has the advantage to reduce the amount of epoxy resin and decrease the radial tensile stress during cool down process. In this paper, the dry and wet coils wound on copper and polytetrafluoroethylene (PTFE, Teflon) bobbin materials with various winding tensions...
The electric coupling between primary and secondary windings of the transformer is usually evaluated by the capacitance between the primary and secondary windings which is tested by one-port test devices, such as LCR meter. This method can't completely characterizes the EMI behaviors of the transformer on common-mode noise, because this method does not account electrical potential distribution along...
The winding AC loss behaviors of push-pull transformer with four windings and two central taps are much different from that of general two winding transformer because the windings conduct currents in different time intervals. The model was introduced by the winding current FFT decomposition and magnetic motive force (MMF) analysis and discloses that the odd harmonic MMF is balanced among the all windings...
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