Diehl Aerospace Gmbh

Trong Tran

Andreas Kraus

Bernd Steph

A lighting apparatus for an AC voltage supply is provided. A rectifier module of the apparatus converts an AC voltage from the AC voltage supply into a rectified supply voltage. A diode cascade of the apparatus has multiple diode cascade sections connected in series and each having an LED. Each diode cascade section has a connectable bypass device for bypassing the diode cascade section. The diode cascade section is in an illuminated state when the bypass device is deactivated and a dark state when the bypass device is activated. A current source module is provided for stabilizing the cascade current through the diode cascade to a setpoint value. At least one diode cascade section has a control device, which has a switching device for converting the detected illuminated state into a switching signal for reducing the setpoint value.

Lighting apparatus comprising a control device and aircraft comprising the lighting apparatus

A lighting device for an AC power supply comprising at least two lighting groups, wherein each lighting group has a group input and a group output and at least one LED, wherein the at least one LED is arranged between the group input and the group output, wherein the lighting groups are connected to one another in series.

Lighting device for an AC power supply

An on-board supply system () for use in an aircraft comprises a fuel cell unit () for generating electrical energy and heat energy, and at least one consumer system (). The fuel cell unit () is designed to release heat energy in the form of hot air, and the consumer system () is designed to absorb the electrical energy and the heat energy in the form of hot air. The fuel cell unit () can comprise at least one low-temperature (LT) fuel cell () and at least one high-temperature (HT) fuel cell (), which can both () be designed to be regulated to their respective operating temperature in operation by means of air cooling, and an air cooling inlet () of the HT fuel cell () can be connected in fluid communication with an air cooling outlet () of the LT fuel cell ().

On-board supply system and on-board galley having a fuel cell unit for use in an aircraft

The present invention is directed to an electrical supply apparatus having an input for connecting the electrical supply apparatus to a mains supply which provides an alternating voltage as input voltage, having an output for connecting the electrical supply apparatus to a load, wherein the output provides a DC voltage as output voltage, having a rectifier which rectifies the input voltage to form a rectified input voltage, having a PFC module which comprises a smoothing device for smoothing the rectified input voltage and an active power factor correction device, wherein the power factor correction device is designed to form a time-dependent supply current for the smoothing device depending on a time-dependent current form signal in such a way that a time-dependent input current in the PFC module is matched to the current form signal, wherein the current form signal is produced by an analogue circuit.

Electrical supply apparatus

A control circuit () for driving a gas discharge lamp, in particular a fluorescent lamp (FL), having a controllable converter () for converting a DC voltage to an AC voltage and having two feed lines (), which are connected on the AC-voltage side to the converter (), and between which the gas discharge lamp can be connected, an inductor (L), a first capacitance (C) and a first controllable switching element (T) being connected in series in the feed lines (). The feed lines () are connected to one another via a second switching element (T). A control unit (ST) controls the switching elements (T, T, T) in synchronism with the AC voltage of the converter () and is designed such that the second switching element (T) is opened after a closed phase for the purpose of starting the gas discharge lamp at such a point in time that the AC voltage at the inductor (L), which is set in the resonant circuit including the inductor (L) and the parasitic capacitance (C) of the second switching element (T), and the AC voltage of the converter (), approximately in-phase in terms of their extrema, are added to give a starting voltage. Furthermore, provided is a corresponding method for driving the gas discharge lamp.

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Erlangen, Germany

Trong Tran