Patent application number | Description | Published |
20090118072 | GENERATOR SHEAR GEAR - A shear gear arrangement with gear teeth on the bearing liner positioned to engage complementary teeth on a shear gear main body. The bearing liner is static, while the shear gear main body mounts on the rotating drive shaft. If a failure occurs, the drive shaft displacement causes the shear gear main body gear teeth to engage the bearing liner teeth, instantaneously loading the shear section of the shaft with a sufficient torque load to shear the section as designed. | 05-07-2009 |
20100013342 | OPTIMIZED MULTI-PHASE ARMATURE WINDING - An electrical motor or generator asymmetrical armature winding configuration generating a multi-phase balanced power output. Each winding group for each pole, and the conductors constituting each winding group, are chosen individually according to their magnetomotive force (MMF) vector relationship to provide a balanced power output even though the individual windings may not be balanced or symmetrical. | 01-21-2010 |
20100231181 | NOVEL STARTER-GENERATOR WITH IMPROVED EXCITATION - An electrical power system may comprise a main generator with a rotor having field windings and at least one embedded permanent magnet. A generator control unit (GCU) may be connected to receive excitation current produced by the main generator with flux from the at least one permanent magnet. An exciter generator may be connected to be provided with excitation from the GCU. The exciter generator may provide excitation current to the field windings of the main generator. The main generator may produce output current from flux from the field windings and the at least one permanent magnet. | 09-16-2010 |
20110133545 | AIRCRAFT ELECTRICAL POWER SYSTEM ARCHITECTURE USING AUXILIARY POWER UNIT DURING APPROACH AND TAXI - An electrical power system architecture uses an auxiliary power unit as an electrical power source during taxi (ground idle) and approach idle (if required). Using the APU as a power source enables a low pressure spool driven electrical generator to be off-line when its speed is too low for it to operate effectively. | 06-09-2011 |
20110241465 | LOW PROFILE STARTER-GENERATOR - A power system for a vehicle may comprise an electric machine interposed between an engine and a transmission of the vehicle. The electric machine may comprise an exciter generator with exciter armature windings surrounding an axis, a main generator with main field windings surrounding the axis so that the exciter generator and the main generator are concentric and a rotor coaxial with the axis and the rotor supporting the exciter armature windings and the main field windings. The rotor may have a first end attached to the engine power output shaft and a second end adapted to deliver mechanical power from the engine to the transmission. | 10-06-2011 |
20130015730 | ENHANCED SPRAY COOLING TECHNIQUE FOR WEDGE COOLINGAANM Waddell; SimonAACI Oro ValleyAAST AZAACO USAAGP Waddell; Simon Oro Valley AZ USAANM Scherzinger; WilliamAACI Oro ValleyAAST AZAACO USAAGP Scherzinger; William Oro Valley AZ USAANM Birdi; Balwinder SinghAACI TucsonAAST AZAACO USAAGP Birdi; Balwinder Singh Tucson AZ USAANM Pearson; WayneAACI Oro ValleyAAST AZAACO USAAGP Pearson; Wayne Oro Valley AZ USAANM Kane; DavidAACI Oro ValleyAAST AZAACO USAAGP Kane; David Oro Valley AZ USAANM Phielix; TomAACI TucsonAAST AZAACO USAAGP Phielix; Tom Tucson AZ US - A wedge cooling apparatus and method for cooling a rotating machine, such as a generator, disperses a spray of cooling fluid into the wedges of the generator. The spray cooling method results in a high heat transfer coefficient of about 2000-3000 W/m | 01-17-2013 |
20130038179 | LANDING GEAR WITH INTEGRATED ELECTRIC MOTOR FOR ELECTRIC TAXI SYSTEM - An electric taxi system (ETS) for an aircraft has an electric motor enclosed within a landing gear strut. A stator winding of the motor is attached to a lower structural element of the strut. | 02-14-2013 |
20130329329 | SOLID STATE POWER CONTROL SYSTEM FOR AIRCRAFT HIGH VOLTAGE DC POWER DISTRIBUTION - An electrical power distribution system (EPDS) for an aircraft, the EPDS may include a DC bus, a power source port, a solid state power controller (SSPC) of a first type interposed between the power source port and the DC bus, at least one load port and an SSPC of a second type interposed between the load port and the DC bus. Power input to the SSPC of the first type may be connected to a unidirectional solid state switching device (SSSD) of the SSPC of the first type. The SSPC of the first type may have forward and reverse current conducting capability and forward and reverse current blocking capability. Power input to the SSPC of the second type may be connected to a unidirectional SSSD of the SSPC of the second type. The SSPC of the second type may have forward and reverse current conducting capability and capability of blocking current from only one direction. | 12-12-2013 |
20140245748 | GAS TURBINE ENGINE OPTIMIZATION BY ELECTRIC POWER TRANSFER - A method of increasing the operational efficiency of an operating gas turbine engine includes supplying mechanical power from a first spool of the operating gas turbine engine to a first electrical machine to thereby generate electrical power using the first electrical machine and supplying mechanical power from a second spool of the operating gas turbine engine to a second electrical machine to thereby generate electrical power using the second electrical machine. The method further includes sensing one or more operational parameters of the operating gas turbine engine and, based on the one or more sensed operational parameters, ceasing to generate electrical power using the second electrical machine, and instead supplying at least a part of the electrical power generated by the first electrical machine to the second electrical machine to operate in motoring mode and to thereby generate and supply mechanical output power to the second spool of the engine. | 09-04-2014 |