Voltage sensing, autoselecting aircraft power supply interface
First Claim
1. An autoselecting interface for selectively connecting an input aircraft power source to one of two interface outputs according to a sensed voltage of the input aircraft power source, the interface comprising:
- a pair of input terminals for connection to aircraft power sources;
first and second pairs of output terminals;
first and second voltage sensors connected to said input terminals, said first voltage sensor producing a first trigger output when an AC voltage is present at said input terminals and said second voltage sensor producing a second trigger output when a DC voltage is present at said input terminals;
a first switch responsive to said first trigger output for electrically connecting said pair of input terminals to said first pair of output terminals;
a second switch responsive to said second trigger output for electrically connecting said pair of input terminals to said second pair of output terminals; and
an override circuit for disabling said second voltage sensor from producing said second trigger output when an AC voltage is present at said input terminals.
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Accused Products
Abstract
An autoselecting interface for selectively connecting an input aircraft power source to one of two outputs according to a sensed voltage of the input aircraft power source comprises a pair of input terminals for connection to aircraft power sources; first and second pairs of output terminals; a first voltage sensor connected to the input terminals for producing a first trigger output when an AC aircraft voltage is present at the input terminals; a second voltage sensor connected to the input terminals for producing a second trigger output when a DC aircraft voltage is present at the input terminals; a first switch responsive to the first trigger output for electrically connecting the pair of input terminals to the first pair of output terminals; a second switch responsive to the second trigger output for electrically connecting the pair of input terminals to the second pair of output terminals; and an override circuit for disabling the second voltage sensor from producing the second trigger output when an AC aircraft voltage is present at the input terminals.
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Citations
10 Claims
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1. An autoselecting interface for selectively connecting an input aircraft power source to one of two interface outputs according to a sensed voltage of the input aircraft power source, the interface comprising:
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a pair of input terminals for connection to aircraft power sources; first and second pairs of output terminals; first and second voltage sensors connected to said input terminals, said first voltage sensor producing a first trigger output when an AC voltage is present at said input terminals and said second voltage sensor producing a second trigger output when a DC voltage is present at said input terminals; a first switch responsive to said first trigger output for electrically connecting said pair of input terminals to said first pair of output terminals; a second switch responsive to said second trigger output for electrically connecting said pair of input terminals to said second pair of output terminals; and an override circuit for disabling said second voltage sensor from producing said second trigger output when an AC voltage is present at said input terminals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An autoselecting power supply for producing a regulated DC voltage output from an input AC or DC aircraft power source, the power supply comprising:
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a pair of input terminals for connection to the aircraft power sources; an AC-DC power converter for producing a first regulated DC voltage output from an AC aircraft power source connected to said pair of input terminals; a DC-DC power converter for producing a second regulated DC voltage output from a DC aircraft power source connected to said pair of input terminals; first and second voltage sensors connected to said input terminals, said first voltage sensor producing a first trigger output when an AC voltage is present at said input terminals and said second voltage sensor producing a second trigger output when a DC voltage is present at said input terminals; a first switch responsive to said first trigger output for electrically connecting said pair of input terminals to said AC-DC power converter; a second switch responsive to said second trigger output for electrically connecting said pair of input terminals to said DC-DC power converter; and an override circuit for disabling said second voltage sensor from producing said second output when an AC voltage is present at said input terminals.
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Specification