Patent ID: 7683499

Claim:
A natural gas turbine generator comprising: a housing that defines an interior chamber in fluid communication with an inlet and an outlet for passage of a gas therethrough, said gas comprising a hydrocarbon; a rotor operatively coupled within said interior chamber, said rotor including an impingement surface and cooperating with said interior chamber to form an annular passageway about said impingement surface, said rotor being rotationally driven when said gas passes through said annular passageway; and a core assembly operatively coupled with at least one magnetic element, said core assembly being stationary relative to said housing and including a plurality of armature plates and a winding, said armature plates defining an outer radial portion, a front face, a back face and an orifice passing from said front face through said back face, said orifice including one of said winding and a lead passing therethrough, said outer radial portion of said plurality of armature plates, said winding and said orifice at said front face of said armature plates being hermetically sealed within a unitary dielectric casting for isolation from said gas, said at least one magnetic element being secured to said rotor for rotation with respect to said core assembly.