Patent ID: 6768408
Filing Date: 2004-07-27
Classification: H01F,H02M,Y10T

Abstract:
A method for forming an electromagnetic assembly having improved damping characteristics, the method for use with a power source including positive and negative source busses and a load including positive and negative load busses, the method comprising the steps of:providing a first toroidal core of magnetic material having at least first and second core sections, the first toroidal core forming a first surface; winding a first winding about the first core section; winding a second winding about the second core section; linking opposite ends of the first winding to the positive source bus and the positive load bus; linking opposite ends of the second winding to the negative source bus and the negative load bus such that common mode currents traveling from the source to the load cause currents in the first core that travel in the same direction; and providing a second toroidal core forming a second surface and positioned relative to the first toroidal core and outside the windings such that the first and second surfaces form an air gap there between.