Abstract: A ripple spring includes a body including a central portion having a substantially sinusoidal shaped surface and a substantially planar end portion extending from each end of the central portion. A stator bar may include an armor layer including a novalac epoxy resin impregnated glass composite.

Abstract: A system for detecting a gas leak in a generator includes a source of carbon dioxide gas, and a subsystem for introducing the carbon dioxide gas into the generator. An infrared imaging device is adapted to communicate with a notification device to display an image of at least a portion of the generator and the carbon dioxide gas. The infrared imaging device is a cooled detector and a filter with a spectral response between about 3 ?m and about 5 ?m. At least one of the detector and the filter is cooled to between about ?80° C. and about ?200° C. The gas leak will be indicated on the notification device.

Abstract: A system for detecting a gas leak in a machine includes a source of a non-corrosive tracer gas, and a subsystem for introducing the non-corrosive tracer gas into the machine. An infrared imaging device is adapted to communicate with a notification device to display an image of at least a portion of the machine. The infrared imaging device has a cooled detector and a filter with a spectral response between about 3 ?m and about 5 ?m. At least one of the detector and the filter is cooled. The infrared imaging device includes one of a mercury cadmium telluride (MCT) photodetector, an indium antimonide (InSb) photodetector or a mid-wavelength quantum well infrared photodetector (QWIP). The notification device is adapted to indicate the gas leak.

Abstract: A system for detecting a gas leak in a generator includes a source of carbon dioxide gas, and a subsystem for introducing the carbon dioxide gas into the generator. An infrared imaging device is adapted to communicate with a notification device to display an image of at least a portion of the generator and the carbon dioxide gas. The infrared imaging device is a cooled detector and a filter with a spectral response between about 3 ?m and about 5 ?m. At least one of the detector and the filter is cooled to between about ?80° C. and about ?200° C. The gas leak will be indicated on the notification device.

Abstract: A system and method for detecting a gas leak in a generator is provided. The system includes a source of a non-corrosive tracer gas, and a subsystem for introducing the non-corrosive tracer gas into the hydrogen cooled generator. An infrared imaging device is adapted to communicate with a notification device to display an image of at least a portion of the hydrogen cooled generator and the non-corrosive tracer gas. The infrared imaging device includes a cooled detector, and a filter with a spectral response between about 3 ?m and about 5 ?m. The detector and/or the filter is cooled to between about ?80° C. and about ?200° C. The gas leak will be indicated on the notification device. The generator may hydrogen cooled, and on-line or on-grid.

Abstract: An on-deck system for non-destructively validating a machine part is provided. The machine part is configured for use with a dynamoelectric machine or a turbomachine. The system includes a portable and hand-held infrared transceiver configured to emit and receive infrared light, and a bandpass filter configured to filter the infrared light. A crystal probe is configured to contact the machine part, and one or more mirrors are configured to direct the infrared light onto the crystal probe and subsequently back to the infrared transceiver/detector. The infrared transceiver is adapted to communicate with a notification device configured to output a notification of a test result.

Abstract: A ripple spring includes a body including a central portion having a substantially sinusoidal shaped surface and a substantially planar end portion extending from each end of the central portion. A stator bar may include an armor layer including a novalac epoxy resin impregnated glass composite.

Abstract: An apparatus for detecting a leak in a gas cooled generator is provided. The apparatus includes a subsystem for introducing a non-corrosive second gas having an infrared absorption spectrum into the generator. The apparatus also includes an imaging component adapted to detect radiation at the infrared absorption spectrum of the non-corrosive second gas. The imaging component is provided with a filter that filters wavelengths in a range encompassing the infrared absorption spectrum of the non-corrosive second gas. The imaging component displays an image of the tracer gas leaking from the generator on the imaging component.

Abstract: A system for detecting a leak in a steam turbine includes an infrared imaging device adapted to scan at least a portion of the steam turbine and communicate with a notification device. The infrared imaging device includes a cooled detector and a filter with a spectral response or bandpass between about 2.5 ?m and about 8 ?m. The leak will be indicated on the notification device, and the cooled detector is cooled to between about ?80° C. and about ?200° C. The steam turbine may be on-line during leak detection.

Abstract: A system and method for detecting a gas leak in a generator is provided. The system includes a source of a non-corrosive tracer gas, and a subsystem for introducing the non-corrosive tracer gas into the hydrogen cooled generator. An infrared imaging device is adapted to communicate with a notification device to display an image of at least a portion of the hydrogen cooled generator and the non-corrosive tracer gas. The infrared imaging device includes a cooled detector, and a filter with a spectral response between about 3 ?m and about 5 ?m. The detector and/or the filter is cooled to between about ?80° C. and about ?200° C. The gas leak will be indicated on the notification device. The generator may hydrogen cooled, and on-line or on-grid.

Abstract: A method of making a composite magnet wire includes mixing alumina nano particles with a polyimide polymer to form a polyimide mixture, the alumina nano particles having a surface treatment applied to outer surfaces of the alumina nano particles, the surface treatment including a phenyl-silane; coating a wire with the polyimide mixture by passing the wire through a coating die; heating the coated wire; cooling the coated wire; passing the coated wire through an annealing oven at a temperature of about 425° C. to about 475° C. at a speed of about 15 to about 30 feet per minute to anneal the coated wire; cooling the annealed coating wire; spooling the coated wire onto a metal spool; heating the spooled wire at about 300° C. to about 400° C. for about 20 to about 40 minutes; and cooling the heated spooled wire.

Abstract: A safe, fast and accurate method of detecting a leak locale of a stator liquid cooling system especially in a plurality of stator windings in a liquid cooled generator is provided. The method includes the step of introducing a non-corrosive compatible gas or its air mixture having an infrared absorption spectrum into the plurality of stator windings of the liquid cooled generator and detecting leaks through the use of an infrared detection system. The infrared detection system includes an imaging component adapted to detect radiation at the infrared absorption spectrum of the non-corrosive gas or its air mixture. The imaging component is provided with a filter that filters wavelengths in a range encompassing the infrared absorption spectrum of the compatible, non-corrosive gas. The imaging component displays an image of the tracer gas leaking from stator liquid cooling system of the generator.

Abstract: In one embodiment, a system includes a generator configured to receive a flow of an organic working fluid. The generator includes a stator and a permanent magnet rotor configured to rotate within the stator to generate electricity. The generator further includes one or more components disposed within the generator and configured to be exposed to the flow of the organic working fluid. The one or more components each include an underlying component, and an encapsulant configured to withstand exposure to the organic working fluid to inhibit contact between the underlying component and the organic working fluid.

Abstract: In one embodiment, a system includes a generator configured to receive a flow of an organic working fluid. The generator includes a stator and a permanent magnet rotor configured to rotate within the stator to generate electricity. The generator further includes one or more components disposed within the generator and configured to be exposed to the flow of the organic working fluid. The one or more components each include an underlying component and a varnish configured to withstand exposure to the organic working fluid to inhibit contact between the underlying component and the organic working fluid.

Abstract: In one embodiment, a waste heat recovery system includes multiple organic Rankine cycle (ORC) systems arranged in a cascade configuration. Each ORC system includes a heat exchanger that transfers heat to the working fluid to vaporize the working fluid. Each ORC system also includes an integrated power module that expands the working fluid to generate electricity.

Abstract: A method for preparing a field coil winding assembly including cleaning a plurality of copper coils followed by developing, after the cleaning, a copper oxide layer on each of the copper coils by oxidizing each of the copper coils in a solution. After the developing, each of the copper coils is rinsed followed by drying. After the drying, a turn insulation system is applied to each of the copper coils. The turn insulation system includes a turn insulation and an adhesive. The turn insulation includes at least one of a glass fiber re-enforced polyamideimide, a glass fiber re-enforced polyester, or a glass fiber re-enforced high temperature novolac epoxy. After the applying, each of the copper coils with the turn insulation system is cured. The plurality of copper coils with the turn insulation system are stacked in each of a plurality of rotor slots in a rotor.

Abstract: A safe, fast and accurate method of detecting a leak locale of a stator liquid cooling system especially in a plurality of stator windings in a liquid cooled generator is provided. The method includes the step of introducing a non-corrosive compatible gas or its air mixture having an infrared absorption spectrum into the plurality of stator windings of the liquid cooled generator and detecting leaks through the use of an infrared detection system. The infrared detection system includes an imaging component adapted to detect radiation at the infrared absorption spectrum of the non-corrosive gas or its air mixture. The imaging component is provided with a filter that filters wavelengths in a range encompassing the infrared absorption spectrum of the compatible, non-corrosive gas. The imaging component displays an image of the tracer gas leaking from stator liquid cooling system of the generator.

Abstract: A resin binder for use in formaldehyde emission-free stator insulation. The resin binder includes an epoxy, a catalyst, and a polymer material. The polymer material is hydroxyl-terminated. The resin binder is used in mica tape for groundwall insulation for stator windings.

Abstract: An apparatus for detecting a leak in a gas cooled generator is provided. The apparatus includes a subsystem for introducing a non-corrosive second gas having an infrared absorption spectrum into the generator. The apparatus also includes an imaging component adapted to detect radiation at the infrared absorption spectrum of the non-corrosive second gas. The imaging component is provided with a filter that filters wavelengths in a range encompassing the infrared absorption spectrum of the non-corrosive second gas. The imaging component displays an image of the tracer gas leaking from the generator on the imaging component.

Abstract: A waste heat utilization system including a generator configured to receive a flow of an organic working fluid and a method of manufacturing the generator component is provided. The method includes preheating the generator component. The method also includes applying a varnish or an encapsulating layer to the generator component. The method further includes baking the generator component with the varnish applied thereto. The method yet further includes cooling the generator component.