Patent ID: 7436277
Filing Date: 2008-10-14
Classification: H01F

Abstract:
1. A multi-phase transformer comprising: a first layer to extend in a first direction from a first end to a second end, the first layer having at least a first planar wire and a second planar wire each extending in the first direction, the first planar wire including a first input port at the first end of the first layer to receive a first input current having a first phase, and the second planar wire including a second input port at the first end of the first layer to receive a second input current having a second phase; a second layer to extend in the first direction from a third end to a fourth end, the second layer being below the first layer and having at least a third planar wire and a fourth planar wire each extending in the first direction, the third planar wire and the fourth planar wire to couple at a common output port at the fourth end of the second layer, at least the first planar wire and the second planar wire of the first layer to form two transformers with at least two planar wires of the second layer; and a coupling device to couple one of the planar wires of the first layer at the second end of the first layer with one of the planar wires of the second layer at the fourth end of the second layer.