Hamilton Sundstrand Corporation

Goodrich Corporation

Goodrich Lighting Systems Gmbh

Rosemount Aerospace Limited

Rajkumar Sengodan

Saravanan Munusamy

Thirunavukkarasu Ramalingam

Vigneshwaran Kalaimani

Ann Freida F

Fault detection system and method each includes a positive input line configured to connect between a voltage input and a load and a negative input line configured to connect between the voltage input and the load. A logic module is operatively connected to and/or configured to detect a fault (e.g., a short circuit) in either of the positive input line or the negative input line between the voltage input and the load.

Fault detection method and system therefor

A system for controlling power provided to an electronic device is disclosed herein. The system includes a switching direct current (DC) power source configured to provide an input voltage at a first frequency, a forward converter coupled to the switching DC power source, wherein the forward converter outputs a first voltage and a second voltage, a frequency multiplier coupled to the forward converter and configured to receive the first voltage as an input, a switch coupled to the frequency multiplier and configured to be driven by the frequency multiplier, wherein the switch outputs a fourth voltage, and a voltage multiplier coupled to the switch and configured to be driven by the switch, wherein the voltage multiplier receives the second voltage and outputs a fifth voltage that is greater than the second voltage.

System and method having a switching converter and self-switched charge pump configuration

A method is provided for monitoring a health of gasket sealing between components. The method includes determining, by a controller, an effective resistance value for a gasket between two components. The method further includes, responsive to the effective resistance value being greater than a first resistive value range of and a second resistive value range, transmitting, by the controller, an indication that the gasket needs to be replaced.

System and method for monitoring gasket sealing health

In accordance with at least on aspect of this disclosure, a system, includes, a DC voltage input configured to provide AC voltage to a load, and a converter operatively connected between the voltage input and the load, configured to convert a DC voltage from the DC voltage input to the AC voltage. In embodiments, the converter can include a first inverter stage operatively connected between the voltage input and a diode bridge, for example, configured to connect one or more intermediate voltage levels to the load. The converter can include a second inverter stage operatively connected between the diode bridge and the load, and an interconnect switching module disposed at the second inverter stage operatively connected to control an output level of the converter at the load.

Power converter having diode bridges in parallel with interconnect switching module

A sensor in an aircraft cargo handling system may comprise a housing, an infrared light emitter, an infrared light photoreceptor, and a microprism. The sensor may be configured to detect an object in proximity to the sensor using electromagnetic waves and voltage measurements. The sensor may include a microcontroller configured to read the voltage measurements associated with infrared electromagnetic waves, compare the voltage measurements to a threshold voltage, and determine the functional condition of the sensor based on the comparison.

PDU sensor using multi optical prism

A Direct Current (DC)-DC converter includes an input capacitor connected across a positive input terminal and a return input terminal. A DC-DC converter circuit is connected across the positive input terminal and the return input terminal. A current limiting failsafe circuit includes a current limiting portion connected across the positive input terminal and the return input terminal and a failsafe portion connected to a sensed voltage output. The failsafe portion is configured to control a current limit function of the current limiting portion and configured to force the DC-DC converter circuit into an off state in response to retripping of the current limiting portion.

Surge protection and failsafe circuit for DC-DC converter

A system for controlling power provided to an electronic device includes a driver configured to drive the electronic device and having an on state and an off state. The system further includes a sensor configured to detect detected electrical data corresponding to electricity provided to the driver. The system further includes a controller configured to compare the detected electrical data to a threshold electrical value and to determine a fault condition in response to the detected electrical data being greater than or equal to the threshold electrical value and to turn the driver to the off state in response to the controller determining the fault condition.

System and method for inrush current control with combinational load drive configuration

Disclosed is a direct current power supply. The direct current power supply includes a voltage output defining a voltage rail and a ground. The direct current power supply includes a holdup capacitor operable to conduct with the voltage output. The direct current power supply includes a redundant power supply connected in series with the holdup capacitor between the voltage rail and the ground of the voltage output to provide the voltage output. The direct current power supply includes a first switch disposed between the holdup capacitor and the redundant power supply operable to create a conductive path between the holdup capacitor and the redundant power supply.

Power supply for aircraft systems

Systems and methods for providing current for a plurality of circuits are provided. Aspects include receiving, by a controller, a fault threshold for each circuit of the plurality of circuits, operating one or more switching circuits to output a current for each circuit of the plurality of circuits, wherein the one or more switching circuits are coupled to a constant current sources, and wherein the one or more switching circuits drive a plurality of current drive circuits, monitoring, by a fault determining circuit, a voltage across each circuit of the plurality of circuits, and determine a fault condition for a first circuit in the plurality of circuits based at least in part on the voltage across the first circuit exceeding the fault threshold for the first circuit.

Selective inrush current control with active current clamp and monitoring

Provided are embodiments for determining solenoid plunger position by performing a method which includes generating, by a first signal circuit, a first signal based at least in part on a pull-in current value of a current applied to a solenoid coil of a solenoid. The method further includes generating, by a second signal circuit, a second signal by applying a time delay to the first signal. The method further includes comparing, by a comparator circuit, the first signal and the second signal to determine whether a plunger of the solenoid has moved within the solenoid from a first position to a second position. The method further includes, responsive to determining that the plunger of the solenoid has moved within the solenoid from the first position to the second position, reducing the current applied to the solenoid coil of the solenoid from the pull-in current value to a hold current value.

Determine solenoid plunger position of a current controlled solenoid using position feedback

A regenerative braking system includes a motor configured to rotate at a variable rotational speed in response to receiving power from a three-phase power supply, and a regenerative braking circuit in signal communication with the three-phase power supply to control the rotational speed of the motor. A brake controller is in signal communication with the regenerative braking circuit and is configured to selectively operate the regenerative braking circuit in a plurality of different braking modes based on the rotational speed of the motor.

Sequential electrical braking with pulsed DC injection rotor lock mechanism

Provided are embodiments for a braking system, where the system includes a controller, a motor coupled to an H-bridge network, a DC link coupled to the motor, and an electrical braking system electrically coupled to the motor. The electrical braking system includes a sense circuit configured to sense a condition of the DC link, a brake resistor coupled to the DC link, a drive circuit coupled to the sense circuit, and a transformer for regeneration. Also, provided are embodiments of a method for operating an efficient regenerative resonance electrical braking system.

Efficient regenerative electrical braking

Systems and methods for operating a light-emitting diode (LED) driver circuit are provided. Aspects include providing an interleaved boost converter including a first boost converter and a second boost converter, the second boost converter interleaved with the first boost converter, operating a first switching element to control a first boost convertor in the LED driver circuit, wherein the first boost convertor is in an ON state responsive to the first switching element being in an ON state, operating a second switching element to control a first boost convertor in the LED driver circuit, wherein the second boost convertor is in an ON state responsive to the first switching element being in an ON state, providing a set of LEDs, wherein the interleaved boost converter provides a step-up voltage to the set of LEDs.

Interleaved boost converter with capacitive multiplier for LED drive

Systems and methods for operating a light-emitting diode (LED) driver circuit are provided. Aspects include a charge pump comprising a plurality of diodes and a plurality of capacitors, a phase sequencer configured to provide a plurality of control inputs, wherein the plurality of control inputs are coupled to the charge pump, a set of light-emitting diodes (LEDs) coupled to the charge pump, and a power supply coupled to an input of the charge pump.

Pulse phase modulation based DC-DC converter with adjustable current control drive

Systems and methods for light emitting diodes (LEDs) circuits are provided. Aspects include a set of light emitting diodes (LEDs) arranged in series between a first node and a second node, a power supply coupled to the first node, a first switching element arranged in series between the first node and a third node, wherein the first switching element is in parallel with the set of LEDs, a first charge pump coupled to the third node, a controller configured to operate the first switching element by providing a control voltage for switching the first switching element between an ON and an OFF, wherein the control voltage comprises a switching frequency, and wherein the first charge pump is charged by the power supply responsive to the switching element being in an ON state.

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Tamil Nadu, India

Rajkumar Sengodan