Patent ID: 8138878

Claim:
A current-compensated choke comprising: a ring core, comprising a solid ring having an outer circumference and an inner circumference surrounding an interior space; at least a first coil and a second coil each of which are wound about the ring core, and each comprising the same number of windings of a conductor; and a non-conductive body disposed within the interior space of the ring core and provided with a first set of holes and a second set of holes, each hole extending from a first surface to a second surface of the non-conductive body, wherein each hole of the first set of holes opposes a corresponding hole of the second set of holes to form opposing pairs in a mirror symmetrical manner relative to a symmetry axis of the ring core, wherein at least one winding of the first coil passes through one hole of the first set of holes, and at least one winding of the second coil passes through one hole of the second set of holes forming an opposing pair with the hole of the winding of the first coil.