Abstract: A main stator sleeve for a generator includes a sheet of material that includes an arcuate notch one two opposed edges such that a butt joint therebetween defines a pin aperture.

Abstract: A generator includes a main cavity and a shaft located in the main cavity. The shaft is configured to be connected to an auxiliary power unit (APU) and rotated by the APU. The generator is configured to generate power based on the rotation of the shaft. A fluid system is configured to receive a fluid from the APU, flow the fluid through the main cavity and return the fluid to the APU through a fluid scavenge channel. A filter is configured to filter the fluid from the main cavity to the fluid scavenge channel and a sensor is configured to detect a characteristic of the fluid at the filter.

Abstract: An arrangement and method for driving a turbomachine having a rotor is provided. The arrangement includes an input shaft rotationally coupled to the rotor. A motor generator device has a motor mode of operation and a generator mode of operation. A differential gear device having a first portion rotationally coupled to the input shaft and a second portion rotationally coupled to the motor generator device. A hydraulic assembly is rotationally coupled between the differential gear and the input shaft. The hydraulic assembly has a plurality of pistons and a pair of wobbler plates. A controller is operably coupled to the input shaft, the motor generator device and the hydraulic assembly, wherein the controller includes a processor that is responsive to executable instructions when executed on the processor for moving the pair of wobbler plates to a first position during a motor mode of operation.

Abstract: A generator includes a main cavity and a shaft located in the main cavity. The shaft is configured to be connected to an auxiliary power unit (APU) and rotated by the APU. The generator is configured to generate power based on the rotation of the shaft. A fluid system is configured to receive a fluid from the APU, flow the fluid through the main cavity and return the fluid to the APU through a fluid scavenge channel. A filter is configured to filter the fluid from the main cavity to the fluid scavenge channel and a sensor is configured to detect a characteristic of the fluid at the filter.

Abstract: Embodiments of the disclosure include a rotating rectifier assembly for a generator having a diode pack and a connection block configured to provide electrical connections to the diode pack. The diode pack includes an inner DC ring, an outer DC ring, a plurality radially stacked diode pairs disposed between the inner DC ring and the outer DC ring. The diode pack also includes one or more diode connection plates disposed between each of the one or more radially stacked pair of diodes. The diode pack also includes one or more DC posts affixed to the inner DC ring and one or more AC posts affixed to the one or more diode connection plates. The connection block is configured to receive the one or more a AC posts and one or more DC posts.

Abstract: A rotor gear mounting assembly for a generator includes a rotor shaft comprising a first end and a second end. Also included is a magnetic member arrangement operatively coupled to the rotor shaft proximate at least one of the first end and the second end. Further included is a hub portion of the magnetic member arrangement. Yet further included is a rotor gear operatively coupled to the hub portion.

Abstract: A disconnect assembly is provided and includes a rotatably drivable input shaft including a first clutch portion, a rotating element including a second clutch portion, which is movable between a first position, at which the first and second clutch portions drivably register with each other, and a second position, at which the first and second clutch portions are displaced from each other and a disconnect bearing. The disconnect bearing is disposed at an inner diameter of the first clutch portion and configured to radially and axially secure the input shaft relative to the rotating element with the second clutch portion disposed in the first or second position.

Abstract: A rotor for an induction motor has a plurality of central laminations defining a central bore extending along an axis. End laminations are at each axial end of the central laminations. Metal is within gaps formed between lamination teeth. The end laminations have teeth extending radially outwardly from a central ring portion. A bore is formed in a face of the end laminations facing outwardly, and adjacent to where the teeth connect into the central ring portion. A motor and method are also described.

Abstract: An arrangement and method for driving a turbomachine having a rotor is provided. The arrangement includes an input shaft rotationally coupled to the rotor. A motor generator device has a motor mode of operation and a generator mode of operation. A differential gear device having a first portion rotationally coupled to the input shaft and a second portion rotationally coupled to the motor generator device. A hydraulic assembly is rotationally coupled between the differential gear and the input shaft. The hydraulic assembly has a plurality of pistons and a pair of wobbler plates. A controller is operably coupled to the input shaft, the motor generator device and the hydraulic assembly, wherein the controller includes a processor that is responsive to executable instructions when executed on the processor for moving the pair of wobbler plates to a first position during a motor mode of operation.

Abstract: A generator includes an aluminum housing having an end plate secured to a housing portion. The housing portion and the end plate respectively include first and second bores. The end plate includes a wall with a boss providing a bore. The wall provides a lubrication passage in fluid communication with the bore. An idler gear includes a shaft having opposing first and second ends respectively supported in the first and second bores. A generator is arranged within the housing and is rotationally coupled to the idler gear. First and second impregnated carbon journal bearings respectively include a first inner and outer bearing diameter and a second inner and outer bearing diameter. The first and second outer bearing diameters are in press fit relationship with the first and second bores respectively. The inner diameters are fixed relative to their respective outer diameter.

Abstract: A rotor for an induction motor has a plurality of central laminations defining a central bore extending along an axis. End laminations are at each axial end of the central laminations. Metal is within gaps formed between lamination teeth. The end laminations have teeth extending radially outwardly from a central ring portion. A bore is formed in a face of the end laminations facing outwardly, and adjacent to where the teeth connect into the central ring portion. A motor and method are also described.

Abstract: An example arrangement for driving a turbomachine includes an input shaft that is configured to rotate a rotor of the turbomachine through a hydraulic log and gear differential rotatable coupled to the input shaft. A motor-generator is rotatably coupled to the differential. The motor-generator has a motor mode of operation and a generator mode of operation. The motor-generator is configured to drive the input shaft through the hydraulic log and differential when the motor-generator is in the motor mode of operation. The input shaft is configured to drive the motor-generator through the hydraulic log and differential when the motor-generator is in the generator mode of operation.

Abstract: A stator core for a generator includes a multiple of core laminations along an axis, each of the multiple of core laminations define at least one leg which extends in a radial direction from the axis.

Abstract: A pump gear includes a pump gear body having involute teeth that each have an involute surface that extends between a tooth tip and a tooth base. The involute surface includes at least reference points A-D, with reference point A near the base, reference point D near the tip, reference point B between reference points A and D, and reference point C between reference points B and D. The reference points A-D have associated respective roll angles, ?A-D, between a corresponding first line that is perpendicular to the involute surface at the given reference point A-D, and a second line that is tangent at a reference point that lies on a terminal end of the involute surface at the tooth base to a reference base circle having a center origin at the center axis.

Abstract: A rotor gear includes a rotor gear body having involute teeth that each have an involute surface that extends between a tooth tip and a tooth base. The involute surface includes at least reference points A-D, with reference point A near the base, reference point D near the tip, reference point B between reference points A and D, and reference point C between reference points B and D. The reference points A-D have associated respective roll angles, ?A-D, between a corresponding first line that is perpendicular to the involute surface at the given reference point A-D and a second line that is tangent at a reference point that lies on a terminal end of the involute surface at the tooth base to a reference base circle having a center origin at the center axis.

Abstract: A gear set for a generator includes a first gear having a first set of involute teeth and a second gear having a second set of involute teeth circumferentially located about a center axis of rotation. Each set of involute teeth includes respective roll angles, ?A-D. For a diametrically smaller one of the first gear and the second gear the roll angle ?A is 1.51°-3.51°, the roll angle ?B is 7.64°-9.64°, the roll angle ?C is 26.03°-28.03°, and the roll angle ?D is 32.16°-34.16°, and for a diametrically larger one of the first gear and the second gear the roll angle ?A is 15.02°-17.02°, the roll angle ?B is 16.7°-18.7°, the roll angle ?C is 21.73°-23.73°, and the roll angle ?D is 23.41°-25.41°.

Abstract: A gear set for a generator includes a first gear having a first set of involute teeth and a second gear having a second set of involute teeth circumferentially located about a center axis of rotation. Each set of involute teeth includes respective roll angles, ?A-D. For a diametrically smaller one of the first gear and the second gear the roll angle ?A is 1.51°-3.51°, the roll angle ?B is 7.64°-9.64°, the roll angle ?C is 26.03°-28.03°, and the roll angle ?D is 32.16°-34.16°, and for a diametrically larger one of the first gear and the second gear the roll angle ?A is 15.02°-17.02°, the roll angle ?B is 16.7°-18.7°, the roll angle ?C is 21.73°-23.73°, and the roll angle ?D is 23.41°-25.41°.

Abstract: A pump gear includes a pump gear body having involute teeth that each have an involute surface that extends between a tooth tip and a tooth base. The involute surface includes at least reference points A-D, with reference point A near the base, reference point D near the tip, reference point B between reference points A and D, and reference point C between reference points B and D. The reference points A-D have associated respective roll angles, ?A-D, between a corresponding first line that is perpendicular to the involute surface at the given reference point A-D, and a second line that is tangent at a reference point that lies on a terminal end of the involute surface at the tooth base to a reference base circle having a center origin at the center axis.

Abstract: A generator includes an aluminum housing having an end plate secured to a housing portion. The housing portion and the end plate respectively include first and second bores. The end plate includes a wall with a boss providing a bore. The wall provides a lubrication passage in fluid communication with the bore. An idler gear includes a shaft having opposing first and second ends respectively supported in the first and second bores. A generator is arranged within the housing and is rotationally coupled to the idler gear. First and second impregnated carbon journal bearings respectively include a first inner and outer bearing diameter and a second inner and outer bearing diameter. The first and second outer bearing diameters are in press fit relationship with the first and second bores respectively. The inner diameters are fixed relative to their respective outer diameter.

Abstract: A rotor gear includes a rotor gear body having involute teeth that each have an involute surface that extends between a tooth tip and a tooth base. The involute surface includes at least reference points A-D, with reference point A near the base, reference point D near the tip, reference point B between reference points A and D, and reference point C between reference points B and D. The reference points A-D have associated respective roll angles, ?A-D, between a corresponding first line that is perpendicular to the involute surface at the given reference point A-D and a second line that is tangent at a reference point that lies on a terminal end of the involute surface at the tooth base to a reference base circle having a center origin at the center axis.