Abstract:
The present invention relates to an inrush current limiter device (4) for limiting inrushing current to a connectable load (3) comprising: at least one switchable IGBT-based limiter unit (5) for selectively limiting the inrushing current, having at least one current limiting conductor element for a limited leading of current and at least an IGBT-based switch (Q2), whereby the IGBT-based switch (Q2) is used as well as a controlled current limiter and as a by-pass element, and at least one control device (7) for controlling the IGBT-based switch (Q2), whereby the control device (7) comprises at least one IGBT-based switch supply (6) and means for realizing (8) a smooth flank of an output signal at the selected conductor element.
Abstract:
A method and device for operating a device for high-voltage switching for driving capacitive loads, having a first and a second input terminal (11, 12) for applying a high voltage supply, such that a higher potential of the high-voltage supply may be applied to the first input terminal (11) and a lower potential may be applied to the second input terminal (12); a first and a second switch (S1, S2), connected in series between the first and the second input terminal (11, 12); a first and a second clamping diode (D3, D4), connected in series and in the same blocking direction between the first input terminal and the second input terminal, such that the first second clamping diode block with respect to the applied high voltage; a storage inductor Ls, which is connected withone of its terminals to a connecting point (13) of the both switches and with another terminal to a connecting point (14) of the both clamping diodes; and an output terminal (15) for connecting a capacitive load Cl, which output terminal is connected with the connecting point (14) of the both clamping diodes (D3, D4). The method comprises starting with both switches (S1, S2) open; closing of the first switch (S1) after a first predetermined time; opening (ST3) of the first switch (S1) after a second predetermined time; closing (ST4) of the second switch (S2), after arriving a zero voltage over the second switch.
Abstract:
The present invention relates to an adaptive driver for driving a gas discharge lamp and a method for operating a gas discharge lamp driven by an adaptive driver, especially a capacitive gas discharge lamp and more especially a dielectric barrier discharge (DBD) lamp in a permanent optimized mode comprising the steps: measuring, sensing, and/or detecting a signal representing the key values of the output of the driver (current, power, voltage, frequency), calculating at least one actual reference value for the quality of the discharge of said lamp, comparing said actual reference value to at least one predefined value for an optimized operation mode of said lamp, and adjusting a power supply according to the result of said comparing.