Abstract: An electrical generation system utilizes a variable frequency generator operating in combination with a constant frequency generator. Also disclosed and claimed are an aircraft electrical architecture, and a gas turbine engine incorporating the above electrical generation system.

Abstract: An apparatus is provided and includes a rotatable shaft on which a first bevel gearbox is disposed, a layshaft on which a second bevel gearbox is disposed, the first and second bevel gearboxes being coupled to transmit shaft rotation to the layshaft, an accessory gearbox to which the layshaft and one or more accessories are coupled and a generator operably disposed on the layshaft between the second bevel gearbox and the accessory gearbox.

Abstract: A power generation system and method uses a constant frequency generator to generate electrical power in a generate mode. When operating in a start mode, the constant frequency generator is controlled by a motor controller which at least partially controls another component while the system is in a generate mode. The power generation system and method can be implemented in, for example, an aircraft electrical architecture.

Abstract: A power generation system and method uses a constant frequency generator to generate electrical power in a generate mode. When operating in a start mode, the constant frequency generator is controlled by a motor controller which at least partially controls another component while the system is in a generate mode. The power generation system and method can be implemented in, for example, an aircraft electrical architecture.

Abstract: A rotor assembly for an electromechanical machine includes a rotor core, an outer sleeve and an inner sleeve. The rotor core includes an outer diameter, and the outer sleeve is positioned about the outer diameter. The inner sleeve is positioned between the rotor core and the outer sleeve. One of the outer sleeve and the inner sleeve dampens electromagnetic flux generated by the rotor assembly.

Abstract: A bypass valve assembly for a generator includes a spring cover with a flange which extends in a radial direction from a spring cover body. The spring cover body defines an overall length dimension, the overall length dimension to an end of the spring cover body to the flange dimension defines a ratio between 1.6:1-1.2:1. The bypass valve assembly also includes a valve sleeve with a multiple of windows. Each of the multiple of windows includes a longitudinal edge which defines a longitudinal edge radius and corner radius.

Abstract: An electrical generation system utilizes a variable frequency generator operating in combination with a constant frequency generator. Also disclosed and claimed are an aircraft electrical architecture, and a gas turbine engine incorporating the above electrical generation system.

Abstract: A rotor assembly for an electromechanical machine includes a rotor core, an outer sleeve and an inner sleeve. The rotor core includes an outer diameter, and the outer sleeve is positioned about the outer diameter. The inner sleeve is positioned between the rotor core and the outer sleeve. One of the outer sleeve and the inner sleeve dampens electromagnetic flux generated by the rotor assembly.

Abstract: A rotor assembly includes several permanent magnets separated by spacers. The permanent magnets and the spacers are all fabricated from material having the same coefficient of thermal expansion. The spacers are in a non-magnetized state and provide support for a sleeve placed in a high interference fit with the permanent magnets. The sleeve is thereby fully supported about the inner circumference such that uneven bending stresses are significantly reduced to provide a desired operational life.

Abstract: A switched reluctance starter/generator is presented which has a stator mounted within a housing having an outer periphery and a plurality of salient poles defining an inner periphery, the salient poles further defining slots therebetween. A stator cooling sleeve is press fit on the outer periphery of the stator and defines a plurality of cooling channels between the outer periphery of the stator cooling sleeve and the housing. A plurality of phase windings are wound on the plurality of salient stator poles, and phase winding retainers are positioned within the slots for securing the phase windings on the salient stator poles. The winding retainers comprise a triangular base separator, a quasi-dove-tailed retaining member, and two opposing wedge shaped expanders. A rotor assembly is rotatably positioned within the stator, and comprises a hollow shaft assembly and a rotor core having a plurality of salient poles press fit on the outer periphery of the shaft.

Abstract: A switched reluctance starter/generator is presented which has a stator mounted within a housing having an outer periphery and a plurality of salient poles defining an inner periphery, the salient poles further defining slots therebetween. A stator cooling sleeve is press fit on the outer periphery of the stator and defines a plurality of cooling channels between the outer periphery of the stator cooling sleeve and the housing. A plurality of phase windings are wound on the plurality of salient stator poles, and phase winding retainers are positioned within the slots for securing the phase windings on the salient stator poles. The winding retainers comprise a triangular base separator, a quasi-dove-tailed retaining member, and two opposing wedge shaped expanders. A rotor assembly is rotatably positioned within the stator, and comprises a hollow shaft assembly and a rotor core having a plurality of salient poles press fit on the outer periphery of the shaft.