AUXILIARY POWER UNIT STARTING SYSTEM FOR AN AIRCRAFT
First Claim
1. An auxiliary power unit starting system for an aircraft comprising:
- an auxiliary power unit comprising a starter motor to start the auxiliary power unit and a generator to provide AC power to the aircraft,a DC power network to provide power to the starter motor,an AC power network adapted to receive power from the generator,an electric connection line connectable between the generator and the AC power network to provide the generated power to the AC power network,a control unit configured to control the auxiliary power unit during an auxiliary power unit starting phase and an auxiliary power unit generating phase, the auxiliary power unit starting system further comprising;
switches to alternatively connect, through the electric connection line, the DC power network with the starter motor during the APU starting phase, and the generator with the AC power network, during the auxiliary power unit generating phase,wherein the control unit is configured to operate the switches to connect the DC power network with the starter motor during the auxiliary power unit starting phase, and the AC power network with the generator during the auxiliary power unit generating phase.
1 Assignment
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Accused Products
Abstract
An auxiliary power unit (APU) starting system for an aircraft comprises an APU comprising a starter motor and a generator, a DC power network, an AC power network, an electric connection line, and a control unit for controlling the APU starting and generating phase. The APU starting system additionally comprises switches for alternatively connecting through the electric connection line the DC power network with the APU starter motor, and the AC power network with the APU generator, wherein the control unit is further configured to operate the switches to connect the DC power network with the APU starter motor during the APU starting phase, and the AC power network with the APU generator during the APU starting phase.
34 Citations
15 Claims
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1. An auxiliary power unit starting system for an aircraft comprising:
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an auxiliary power unit comprising a starter motor to start the auxiliary power unit and a generator to provide AC power to the aircraft, a DC power network to provide power to the starter motor, an AC power network adapted to receive power from the generator, an electric connection line connectable between the generator and the AC power network to provide the generated power to the AC power network, a control unit configured to control the auxiliary power unit during an auxiliary power unit starting phase and an auxiliary power unit generating phase, the auxiliary power unit starting system further comprising; switches to alternatively connect, through the electric connection line, the DC power network with the starter motor during the APU starting phase, and the generator with the AC power network, during the auxiliary power unit generating phase, wherein the control unit is configured to operate the switches to connect the DC power network with the starter motor during the auxiliary power unit starting phase, and the AC power network with the generator during the auxiliary power unit generating phase. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An aircraft comprising an auxiliary power unit starting system, comprising:
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an auxiliary power unit comprising a starter motor to start the auxiliary power unit and a generator to provide AC power to the aircraft, a DC power network to provide power to the starter motor, an AC power network adapted to receive power from the generator, an electric connection line connectable between the generator and the AC power network to provide the generated power to the AC power network, a control unit configured to control the auxiliary power unit during an auxiliary power unit starting phase and an auxiliary power unit generating phase, the auxiliary power unit starting system further comprising; switches to alternatively connect, through the electric connection line, the DC power network with the starter motor during the APU starting phase, and the generator with the AC power network, during the auxiliary power unit generating phase, wherein the control unit is configured to operate the switches to connect the DC power network with the starter motor during the auxiliary power unit starting phase, and the AC power network with the generator during the auxiliary power unit generating phase.
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Specification