Abstract: A double insulated stator core is provided. The double insulated stator core includes stator donuts that define a stator core. Each donut includes a plurality of circumferentially disposed notches around an outer perimeter of the donut that align with notches in other stator donuts and form slots extending the length of the stator core. Each notch includes opposing side walls where each side wall includes a groove. A plurality of wedge sets are included for mounting the stator donuts to a plurality of building bolts. Additionally, a layer of insulation is interposed between the groove and the respective donut wedge set so that the insulation abuts the surface of the groove. The respective wedge set and the layer of insulation provided in each grove secures each building bolt with the notch. The layer of insulation is configured to electrically isolate the stator donut from a stator frame of a generator.

Abstract: An assembly and a method for supporting generator stator end winding coils are presented. The assembly includes an outer support circumferentially disposed on outer side of bottom end winding coils and inner braces disposed on inner side of top end winding coils and circumferentially spaced apart from each other. At least one inner brace is disposed along an axial direction of the top end winding coils. Studs are radially oriented and threaded into the inner braces from the outer support. The studs are tensioned and retightenable to a required clamping force for supporting the end winding coils. Filler layers are disposed between the top end wind coils and bottom end wind coils for supporting the clamping force.

Abstract: An assembly and a method for supporting generator stator end winding coils are presented. The assembly includes an outer support circumferentially disposed on outer side of bottom end winding coils and inner braces disposed on inner side of top end winding coils and circumferentially spaced apart from each other. At least one inner brace is disposed along an axial direction of the top end winding coils. Studs are radially oriented and threaded into the inner braces from the outer support. The studs are tensioned and retightenable to a required clamping force for supporting the end winding coils. Filler layers are disposed between the top end wind coils and bottom end wind coils for supporting the clamping force.

Abstract: A method for lubricating a generator bearing assembly is presented. The generator bearing assembly has a bearing and a bearing seat that supports the bearing. A coating of a lubricating material is applied at an interfacing surface between the bearing and the bearing seat. A curing process is performed to the coating by heating the coating up to a predefined curing temperature.

Abstract: A method of servicing a stator frame of a power generator. The method includes removing a first stator core from a main housing of the stator frame, removing a plurality of first dove-tail shaped keybars that extend axially within and are coupled to a main support structure forming part of the main housing, and installing a plurality of second keybars in the main support structure in place of the first dove-tail shaped keybars. The second keybars are adapted to support a second stator core. Each of the second keybars has a generally rounded engagement surface and the second stator core includes recesses with shapes corresponding to the generally rounded engagement surfaces of the second keybars such that the second stator core can be securely supported in the main support structure by the second keybars.

Abstract: A method for lubricating a generator bearing assembly is presented. The generator bearing assembly has a bearing and a bearing seat that supports the bearing. A coating of a lubricating material is applied at an interfacing surface between the bearing and the bearing seat. A curing process is performed to the coating by heating the coating up to a predefined curing temperature.

Abstract: The present invention comprises a process for assembling a stator core assembly to replace existing stator cores in electric power generators. First and second stator core modules are positioned adjacent to one another such that one end of a fastener assembly in the second stator core module is nested in a counter-bore of the first stator core module and one end of a fastener assembly in the first stator core is nested in a counter-bore of the second stator core module.

Abstract: An intercoupled stator core is separated from a non-vertically oriented (including horizontal) generator frame by decoupling the stator core and frame coupling members and interposing a slidable member between them. Thereafter they are separated relative to each other on the sliding member. The sliding or slidable member may comprise a rail, or alternatively a roller adapted for rolling contact with one of the opposed stator core or generator structures and an engagement surface in contact with the other structure. A system for separating the stator core from a non-vertically oriented generator frame includes first and second raising end plates adapted coupled to axial ends of the stator core. The end plates project outwardly from the generator frame ends, for coupling to a raise mechanism. After the raise mechanism raises the stator core the slidable member is interposed between the stator core and generator frame.

Abstract: A method of servicing a stator frame of a power generator. The method includes removing a first stator core from a main housing of the stator frame, removing a plurality of first dove-tail shaped keybars that extend axially within and are coupled to a main support structure forming part of the main housing, and installing a plurality of second keybars in the main support structure in place of the first dove-tail shaped keybars. The second keybars are adapted to support a second stator core. Each of the second keybars has a generally rounded engagement surface and the second stator core includes recesses with shapes corresponding to the generally rounded engagement surfaces of the second keybars such that the second stator core can be securely supported in the main support structure by the second keybars.

Abstract: Removing a generator core (10) from a frame (24) includes removing electrical and mechanical connections between the core and components external to the frame; installing a lift support assembly (34, 38, 42, 46) outboard of the core at each of an exciter end and a turbine end of the frame; installing a pilot shaft support assembly (50, 70, 73) between an inner surface of a core bore (10D) and an outer surface (40A) of a pilot shaft (40) at each of the exciter end and the turbine end of the frame; installing the pilot shaft through the first and second pilot shaft support assemblies and the core bore, the pilot shaft supported by the lift support assembly at the exciter end and the turbine end; decoupling the core and the frame; and activating a force-producing device (90) to slide the core out of the frame.

Abstract: A generator is provided comprising: a frame; a stator core comprising laminations; and clamping structure to axially clamp the laminations together. The clamping structure may comprise: a plurality of first finger plates engaging a first end of the stator core; a first spacer plate associated with the first finger plates and including a plurality of spaced apart first recesses; a plurality of first engagement structures, each comprising a bolt and a corresponding slidable bushing; a first spring ring in engagement with the first engagement structures; and first load-applying structure coupled to the frame to imparts a load to the first spring ring.

Abstract: A spring bar assembly for connecting a stator core to a stator frame. The spring bar assembly includes an attachment member with a hole and a spring bar with a hole that aligns with the hole in the attachment member. A bolt passes through the hole in the attachment member and the hole in the spring bar, where the bolt is used to couple the attachment member to the spring bar.

Abstract: A spring bar that connects a stator core to a stator frame. The spring bar assembly includes an attachment member with a hole and a spring bar that tapers from a central region and that includes a hole at each end that aligns with the hole in the attachment member. A bolt passes through the hole in the attachment member and the hole in the spring bar, where the bolt is used to couple the attachment member to the spring bar.

Abstract: An insulated cover (10) for insulating at least two electrically-connected stator bar winding ends (18, 20) in a dynamoelectric machine. The cover (10) comprises a first member (12) for mating with a second member (14), a first interlocking structure (52) on a surface of the first member (12) and a second interlocking structure (50) on a surface of the second member (14). When the cover (10) is installed to insulate the bar winding ends (18, 20) by placing the first (12) and second (14) members in contact, the first (52) and second (50) interlocking structures positively lock to prevent relative displacement of the first (12) and second (14) members.

Abstract: An intercoupled stator core is separated from a non-vertically oriented (including horizontal) generator frame by decoupling the stator core and frame coupling members and interposing a slidable member between them. Thereafter they are separated relative to each other on the sliding member. The sliding or slidable member may comprise a rail, or alternatively a roller adapted for rolling contact with one of the opposed stator core or generator structures and an engagement surface in contact with the other structure. A system for separating the stator core from a non-vertically oriented generator frame includes first and second raising end plates adapted coupled to axial ends of the stator core. The end plates project outwardly from the generator frame ends, for coupling to a raise mechanism. After the raise mechanism raises the stator core the slidable member is interposed between the stator core and generator frame.

Abstract: Removing a generator core (10) from a frame (24) includes removing electrical and mechanical connections between the core and components external to the frame; installing a lift support assembly (34, 38, 42, 46) outboard of the core at each of an exciter end and a turbine end of the frame; installing a pilot shaft support assembly (50, 70, 73) between an inner surface of a core bore (10D) and an outer surface (40A) of a pilot shaft (40) at each of the exciter end and the turbine end of the frame; installing the pilot shaft through the first and second pilot shaft support assemblies and the core bore, the pilot shaft supported by the lift support assembly at the exciter end and the turbine end; decoupling the core and the frame; and activating a force-producing device (90) to slide the core out of the frame.

Abstract: The present invention comprises a stator core module, stator core assembly and process for assembling a stator core assembly to replace existing stator cores in electric power generators. First and second stator core modules are aligned such that one end of a fastener assembly in the second stator core module is nested in a counter-bore of the first stator core module and one end of a fastener assembly in the first stator core is nested in a counter-bore of the second stator core module.

Abstract: An electric motor-powered linkage is provided for raising and lowering an implement mounted on a lawn and garden tractor. The energization of the motor and preselection of the position to which it is desired that the motor move the implement is accomplished through means of a control system including a pair of side-by-side arms pivotally mounted for swinging movement about a common axis. On one arm is mounted first and second normally open control switches forming part of a control circuit connected to a motor-reversing power circuit, and on the other arm is mounted a cam forming part of a follow-up linkage. To selectively actuate the motor to drive in forward and reverse, the arm on which the control switches are mounted is selectively manually swung in opposite first and second directions to cause the first and second switches to be respectively actuated to closed positions by first and second arcuate surfaces of the cam.

Abstract: A manually shiftable actuator-position input member and an actuator-operator feedback member cooperate as switch means for controlling the operation of an actuator including a rod connected to be reciprocably driven by a reversible electric motor. The input and feedback members normally occupy neutral positions relative to each other wherein electrical current is disconnected from the motor. Energization of the motor to cause it to drive in the forward and reverse directions may respectively be accomplished by moving the input member in opposite first and second directions from its neutral position. The distance through which the input member is moved preselects the distance through which the motor drives the rod, the motor driving the feedback member via the rod such as to restore the neutral positions of the input and feedback members when the rod has been driven to the preselected position.