Generator having shielded current transformers positioned therein

Claim 2

An electromechanical generator comprising: a rotor; a stator assembly having a magnetic core and a winding structure extending from said magnetic core, said stator assembly being disposed around said rotor; a flux shield constructed of a non-magnetic, electrically conductive material, said flux shield having a bottom portion and side portions extending from said bottom portion, said flux shield being dispOsed substantially adjacent to the winding structure which extends from said magnetic core; and, a closed magnetic core with a layered winding disposed thereon, said closed magnetic core and layered winding structure being positioned between the sides of said flux shield, with substantially one-half of the layers of the layered winding progressing in one direction and the other layers progressing in the opposite direction for providing a winding which does not have any net turns which would be linked by magnetic flux which is directed perpendicular to the bottom portion of the flux shield; said bottom portion of said flux shield having an opening therein through which a lead from said stator winding structure extends to provide inductive coupling between the lead and the layered winding on the closed magnetic core.

Claim 3

The electromechanical generator of claim 1 wherein the bottom portion of the flux shield is aligned in such a manner that the plane generally containing said bottom portion is tangent to a cylindrical surface defined generally by the stator winding structure.

Claim 4

The electromechanical generator of claim 1 wherein the flux shield includes a top member constructed of a non-magnetic, electrically conductive material and having an opening therein, said top member being positioned parallel to the bottom portion of the flux shield and substantially across the ends of the side portions to substantially enclose the core and winding structure, and a cylindrical member constructed of a non-magnetic, electrically conductive material and positioned with an opening therethrough adjacent to the openings in the top member and the bottom portion of the flux shield.

Claim 5

A three-phase generator comprising: a rotor assembly; a stator assembly having a magnetic core and a three-phase winding structure having three phase windings which at least partially extend from said magnetic core, said stator assembly being disposed around said rotor assembly; at least one cup-shaped flux shield constructed of a non-magnetic, electrically conductive material, said flux shield having a bottom portion with an opening therein and side portions extending from said bottom portion, said flux shield being disposed substantially adjacent to the extended portion of a phase winding; and, a closed magnetic core having a winding disposed thereon, said closed magnetic core and winding structure being positioned between the sides of said flux shield, with the winding changing its direction of progression a sufficient number of times around the magnetic core to provide a winding which does not have any net turns which would be linked by magnetic flux which is directed perpendicular to the bottom portion of the flux shield; said bottom portion of said flux shield having an opening therein through which a lead from a phase winding extends to provide inductive coupling between the lead and the winding on the closed magnetic core.

Claim 6

A three-phase generator comprising: a rotor assembly; a stator assembly having a magnetic core and a three-phase winding structure having three phase windings which at least partially extend from said magnetic core, said stator assembly being disposed around said rotor assembly; at least one cup-shaped flux shield constructed of a non-magnetic, electrically conductive material, said flux shield having a bottom portion with an opening therein and side portions extending from said bottom portion, said flux shield being disposed substantially adjacent to the extended portion of a phase winding; and, a closed magnetic core having a winding disposed thereon, said closed magnetic core and winding structure being positioned between the sides of said flux shield, with the winding changing its direction of progression a sufficient number of times around the magnetic core to provide a winding which does not have any net turns which would be linked by magnetic flux which is directed perpendicular to the bottom portion of the flux shield; said bottom portion of said flux shield having an opening therein through which a lead from a phase winding extends to provide inductive coupling between the lead and the winding on the closed magnetic core.

Claim 7

The three-phase generator of claim 4 wherein the lead which extends through the opening in the bottom portion of the flux shield primarily carries current from a phase winding other than the one to which the flux shield is disposed substantially adjacent.