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Flux Rationing Transforming Winding to Effect Fractional Turns

IP.com Disclosure Number: IPCOM000046752D
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07

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Christensen, JJ Weekly, RD [+details]


This transformer winding technique includes an auxiliary winding to ration the flux in each of the outside core legs so that fractional turn voltages are provided without uneven loading of the transformer core. Fig. 1 illustrates a winding to provide a half turn. Auxiliary winding 1 is wound around each of the outside core legs and connected in parallel. It forces the flux and, therefore, the volts per turn around each window to be equal. Fig. 2 shows this imbalance correction effected by using two windings of equal turns terminating out of different windows and connected in parallel. This effectively provides a winding of one and one-half turns. Other fractional turns ratios are possible using the auxiliary winding to set the ratio of volts per turn around each of the core windows. Fig.