摘要:
Systems and methods for controlling a power conversion system are provided. The power conversion system includes a power converter comprising a primary stage coupled to a secondary stage to generate an output direct current (DC) voltage from an input voltage received from an input voltage source. The power conversion system also includes a control circuit coupled to the power converter. The control circuit is configured to implement a self-adjusting set-point control algorithm to generate the output DC voltage without using an input voltage measurement, wherein the output DC voltage follows the input voltage over at least a portion of an input voltage range.
摘要:
Electrical enclosure including circuit breaker, exterior panels defining a volume, wall separating compartments defined in the volume, and cooling channel component. Cooling channel component includes first plate coupled to wall. First plate includes first end and a second opposite end coupled to wall, the first plate covering an opening defined in wall and having a first aperture defined therethrough, first aperture having a first shape and a first orientation. Cooling channel component also includes electrically conductive second plate coupled to first plate and having a first end coupled to first plate first end and a second opposite end coupled to first plate second end, the second plate having at least one second aperture defined therethrough, the second aperture having a second shape and a second orientation, where a hollow cavity is defined between the first and second plates, and where the first and second apertures are arranged in a non-overlapping configuration.
摘要:
A system is provided. The system includes a plurality of uninterruptible power supplies (UPSs), a ring bus, and at least one controller communicatively coupled to the plurality of UPSs, the at least one controller configured to calculate an output voltage frequency for each UPS of the plurality of UPSs, wherein the output voltage frequency for a UPS of the plurality of UPSs is calculated based at least on a derivative of an average active output power of the UPS, and control operation of each UPS based on the respective calculated output voltage frequencies.
摘要:
A busway system is provided. The busway system includes a first electrical busway section, a second electrical busway section, and a busway joint. The first and second electrical busway sections are disposed longitudinally offset from each other. The busway joint couples the first and second busway sections. The busway joint includes a plurality of busbars, a plurality of splice plates coupled to the busbars, and a vise brace surrounding the busbars and the splice plates. The splice plates and the busbars electrically couple the first and second electrical busway sections. The vise brace includes a clamp screw to selectively provide a compressive force to the busbars and the splice plates.
摘要:
A method of managing evaporated cryogenic fuel in a storage tank of a cryogenic fuel system of an aircraft and an aircraft having at least one turbine engine providing propulsive force for the aircraft and a cryogenic fuel system including a passively cooled cryogenic fuel storage tank located within the aircraft, a pressure vent fluidly coupled to the cryogenic fuel storage tank and exhausting evaporated gas from the cryogenic fuel to define a natural gas vent stream, and a catalytic converter fluidly coupled to the pressure vent.
摘要:
Embodiments of hot streak alignment for gas turbine durability include structures and methods to align hot streaks with the leading edges of aligned first stage nozzle vanes in order to improve mixing of the hot streaks with cooling air at a stator nozzle of a first stage turbine and reduce usage of cooling air at first stage non-aligned stator nozzle vanes disposed adjacent to the aligned stator vanes.
摘要:
A damper bearing assembly for a gas turbine engine is disclosed. The damper bearing assembly is designed to define forward and aft axial gaps which allow for normal deflection under standard operating thrust loads, but then close during a fan blade out event to allow the increased load to transfer to the damper housing. Frictional forces between contacting parts limit torsional windup and increase torsional resistance with increasing load. The damper bearing assembly includes a damper housing configured substantially within a U-shaped spring finger housing and a spanner nut with a radial hook portion coupled to the spring finger housing. The damper housing is coupled to the spring finger housing such that it is substantially confined within the U-shaped void. The spanner nut is coupled to the spring finger housing such that the radial hook portion is configured to limit the deflection of the spring finger housing and damper housing during a fan blade out event.
摘要:
A computer for continuous calibration of circuit breaker trip units and metering devices includes a processor and a memory device. The computer is configured to request and receive circuit breaker current data from a plurality of circuit breaker trip units. The circuit breaker current data represents current data associated with the circuit breaker trip units over a collection interval. The computer is configured to receive main current data from a main trip unit. The computer is configured to determine a plurality of calibration factors for the circuit breaker trip units based upon the circuit breaker current data and the main current data. The computer is additionally configured to transmit the calibration factors to the circuit breaker trip units.
摘要:
A plasma generation device assembly includes a base including a top surface. The plasma generation device assembly also includes a plasma generation device and a plurality of coupling members. The plasma generation device includes a body unitarily formed from an ablative material and a plurality of plasma generation device terminals coupled to the body. The plasma generation device is positioned on the top surface and is configured to emit ablative plasma when the plasma generation device is activated. The plurality of coupling members is configured to couple the plasma generation device to the top surface.
摘要:
The present disclosure involves an oil scoop manifold receives and directs the oil in fore and aft directions to lubricate multiple bearing assemblies.