Transformers and coupled inductors with optimum interleaving of windings
First Claim
Patent Images
1. A transformer having an arbitrary turns ratio, comprising:
- a primary physical turn and a secondary physical turn, the primary and secondary physical turns are not bifilar and are interleaved on the same winding layer; and
a transformer core having portions, the primary and secondary physical turns being distributed over the portions of the transformer core with each portion containing turns from all the windings of the transformer, the primary and secondary physical turns on the same winding layer being substantially the same distance from the transformer core;
such that, in each portion of the transformer core, in use, mmf driving leakage flux is minimized.
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Abstract
A transformer or coupled inductor with any arbitrary turns ratio (for example, non-integral), and optionally with multiple secondary windings, has primary and secondary windings interleaved on the same winding layer, preferably around a magnetically permeable or an air core. This is capable of giving optimum magnetic coupling, minimum leakage fields and negligible proximity effect losses. The electrical turns ratio is determined by series or parallel, or combination series-parallel, connections of the physical turns of each winding.
161 Citations
21 Claims
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1. A transformer having an arbitrary turns ratio, comprising:
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a primary physical turn and a secondary physical turn, the primary and secondary physical turns are not bifilar and are interleaved on the same winding layer; and a transformer core having portions, the primary and secondary physical turns being distributed over the portions of the transformer core with each portion containing turns from all the windings of the transformer, the primary and secondary physical turns on the same winding layer being substantially the same distance from the transformer core; such that, in each portion of the transformer core, in use, mmf driving leakage flux is minimized. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A coupled inductor having an arbitrary turns ratio, comprising:
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a primary physical turn and a secondary physical turn, the primary and secondary physical turns are not bifilar and are interleaved on the same winding layer; and an inductor core having portions, the primary and secondary physical turns being distributed over the portions of the inductor core with each portion containing turns from all the windings of the inductor, the primary and secondary physical turns on the same winding layer being substantially the same distance from the inductor core; such that, in each portion of the inductor core, if used as a transformer, mmf driving leakage flux is minimized. - View Dependent Claims (15, 16)
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- 17. A transformer or coupled inductor with arbitrary turns ratio, in which the primary and secondary physical turns are interleaved on the same winding layer, further comprising at least one electrical circuit component situated in a region surrounded by a core of the transformer or coupled inductor and in which said turns are adapted for connection to said at least one circuit component.
- 19. A transformer or coupled inductor with arbitrary turns ratio, with superimposed winding layers in which the primary and secondary physical turns are interleaved both within each of the layers and also from layer to superimposed layer, and in which, within each winding layer, the turns are substantially the same distance from a core.
Specification