Center tapped transformers for isolated power converters

摘要

A cost effective solution for construction of high frequency, double ended, isolated, push pull, center tapped power transformers operating in continuous/discontinuous mode with minimized winding proximity losses comprises at least two identical sets of windings with identical coupling coefficients. Each set of windings consists of at least one primary winding and at least one secondary winding tightly coupled to each other. Both the sets of windings are loosely coupled to each other with a magnetic field isolating separator.

主权项

1. A center tapped power transformer comprising:
at least two identical sets of windings, said sets of windings having identical number of turns and structure to achieve identical coupling coefficients, said sets of windings being spaced apart from each other; each of said sets of windings including at least one primary winding and at least one secondary winding, said at least one primary winding being coupled to said at least one secondary winding by placing the primary and secondary windings abutting each other; the primary windings of each of said sets of windings connected in parallel; and a magnetic field isolating separator placed in the space between said sets of windings so that an electromagnetic coupling between said sets of windings is less than an electromagnetic coupling between the at least one primary winding and the at least one secondary winding of each of said sets of windings; wherein the at least one secondary winding of a first one of said sets of windings is configured not to conduct current when the at least one secondary winding of a second one of said sets of windings is conducting current, the at least one secondary winding of the first one of said sets of windings experiencing substantially no current field and substantially no proximity losses due to induced eddy currents when the at least one secondary winding of the second one of said sets of windings is conducting current.