Composite transformer and insulated switching power source device
AssigneeMurata Manufacturing Co., Ltd.
InventorTadahiko Matumoto
Life of this patent
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Abstract
An E-shaped transformer core has a middle leg and one pair of outer legs and on opposite sides with respect to the middle leg. A first pair of coils including at least two coils are wound around the middle leg so that a power transmission transformer unit is formed. The outer leg is divided into two outer leg portions and with a space therebetween allowing coil wiring therebetween, and a second pair of coils including two coils are respectively wound around the respective two outer leg portions and so as to have mutually opposite winding directions, so that a signal transmission transformer unit is formed.
Claims9
A composite transformer comprising:
- a core having a middle leg and at least one pair of outer legs on opposite sides with respect to the middle leg, the core forming a closed magnetic path;
- two outer leg portions being defined by at least one of the outer legs being divided with a space therebetween allowing coil wiring therebetween;
- a first pair of coils including at least two coils wound around the middle leg of the core;
- and
- a second pair of coils including at least two coils respectively wound around said two outer leg portions such that a winding direction of a portion of each of the at least two coils that is wound around one of the two leg portions is opposite to a winding direction of a portion of each of the at least two coils that is wound around another of the two leg portions;
- wherein
- the first pair of coils and the second pair of coils are arranged such that magnetic interference does not substantially occur between the first pair of coils and the second pair of coils.
Dependencies are inferred from the claim text.