Abstract: A method and system for an electronic Design Record Book (e-DRB) is disclosed. Software modules interface with a product data management tool to electronically store and retrieve documents. The documents may relate to engineering design information throughout a product's life cycle. Documents are stored in articles, with which metadata and attributes are associated. The articles may be checked out by a user for editing, and checked back in for other users to view. A reviewer may be required to approve the edits made to an article. An export control flag is used to prohibit unauthorized exportation of sensitive information. Archive records of each edit are maintained. The e-DRB provides search capability based on metadata information. The e-DRB may be accessed via a network such as the Internet.

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.

Abstract: A polyphase electric generator (10) is disclosed having a fixed output voltage configurable to virtually any voltage level within a certain range of voltages. The armature winding (18) of the generator is arranged in a combined Delta and Wye topology (60, 66). Each phase winding (20, 54) in the armature is partitioned into first and second sections of the phase winding (56, 58). The first sections (56, 62, 64) of each of the phase windings are arranged together in a Delta topology (60). Each of the second sections of each phase winding is arranged in a Wye topology (66) with a pair of the first winding sections. Each of the second sections (58) are connected at one end to a node (68) of the Delta topology where two of the first winding sections are connected. The opposite ends (70) of the second sections of each phase winding are connected to output terminals (26) of the armature to provide a line-to-line voltage output.

Abstract: In electrical machines having a stator core formed by groups of stacked laminations spaced axially one from the other to define with spacers therebetween a plurality of radially extending cooling ducts, there is provided transition inserts in the flow passages. The inserts have surfaces which in part define the flow paths and form gradual transition surfaces between the flow path sections to minimize flow losses. The flow path surfaces of the transition inserts may be linear or curvilinear.

Abstract: A cooling gas ventilation circuit is provided for an end winding of a rotary machine having a rotor of the type having a plurality of radial slots and a plurality of coils respectively seated in the radial slots, the coils extending beyond a pole face of the rotor to form the end winding. The ventilation circuit is composed of first and second cooling gas passages, respectively defined in at least one turn of each coil of the end winding. Each first cooling gas passage extends from an inlet port in communication with a cavity on one longitudinal side of the turn to an exit port defined on the other longitudinal side of the turn. Each second cooling gas passage extends from an inlet port in communication with the cavity on the one longitudinal side of the turn to an outlet in the form of a radial chimney defined through a plurality of the turns of the coil within the respective radial slot.

Abstract: A synchronous generator is disclosed having main power windings and auxiliary power windings, where the auxiliary power winding is coupled to a variable frequency drive system. The variable frequency drive causes the generator to function as a motor and turn a drive shaft to start a gas turbine. Switching circuits are used to connect and disconnect the auxiliary windings of the generator with the variable frequency power supply.

Abstract: A synchronous generator is disclosed having main power windings and auxiliary power windings, where the auxiliary power winding is coupled to a variable frequency drive system. The variable frequency drive causes the generator to function as a motor and turn a drive shaft to start a gas turbine. Switching circuits are used to connect and disconnect the auxiliary windings of the generator with the variable frequency power supply.

Abstract: A method for building a specification for leased or purchased equipment. The method comprises electronically soliciting from a user a selection for a generic specification for the equipment, soliciting from the user a manufacturer of one component of the equipment, displaying options and prices for the component and allowing the user to select different options for the component, the act of displaying options and prices including updating the displayed options and prices after an interrelated option has been selected, and generating a report at the client showing the options selected and a subtotal cost for the component.