Method for increasing subtransient reactance of a generator
AssigneeGeneral Electric Company
InventorsWei Tong, Frederick John Rink, Jr., James Michael Fogarty, John Wesley Griffith, Christian Lee Vandervort
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Abstract
A magnetic armature wedge is provided for replacing conventional dovetail wedges in high-powered large-size turbine generators. The magnetic armature wedges that are used for supporting the armature bars are made by molding resin, e.g., epoxy with ferromagnetic particles, wires, laminates and the like embedded therewithin. The magnetic particles, wires, laminates and the like increase the magnetic permeability of the wedges causing higher slot flux leakage and high generator subtransient reactants.
Claims18
A method of increasing generator subtransient reactance in a circumferential direction comprising disposing a magnetic assembly including providing at least one of a magnetic armature wedge structure and a magnetic wedge slide in an armature slot for retaining armature coil components therewithin, thereby defining a magnetic flux bridge to increase armature slot leakage flux in said circumferential direction and thereby increase armature slot leakage reactance in said circumferential direction.
A method of increasing generator subtransient reactance in a circumferential direction comprising disposing a magnetic assembly induding providing at least one of a magnetic armature wedge structure and a magnetic wedge slide in an armiature slot for retaining armature coil components therewithin, thereby defining a magnetic flux bridge to increase armature slot leakage flux in said circumferential direction and thereby increase armature slot leakage reactance in said circumferential direction, wherein said step of providing a magnetic armature wedge structure comprises providing a molded wedge having a core of magnetic material disposed to extend along a substantial length thereof and a resin part encapsulating the magnetic core.
A method of increasing generator subtransient reactance comprising disposing a magnetic assembly including providing at least one of a magnetic armature wedge structure and a magnetic wedge slide in an armature slot for retaining armature coil components therewithin, thereby defining a magnetic flux bridge to increase armature slot leakage flux and thereby increase armature slot leakage reactance, wherein said step of providing a magnetic armature wedge structure comprises providing a molded wedge having a core of magnetic material and a resin part encapsulating the magnetic core, wherein said magnetic core encapsulated in said resin part of said magnetic armature wedge structure comprises an elongated, centrally disposed magnetic core made from mixing resin and ferromagnetic particles.
A method of increasing generator subtransient reactance in a circumferential direction comprising disposing a magnetic assembly including providing at least one of a magnetic armature wedge structure and a magnetic wedge slide in an armature slot for retaining armature coil components therewithin, thereby defining a magnetic flux bridge to increase armature slot leakage flux in said circumferential direction and thereby increase armature slot leakage reactance in said circumferential direction, wherein said magnetic wedge slide is formed from resin having ferromagnetic particles distributed therethrough, to increase subtransient reactance.
Dependencies are inferred from the claim text.