Patent application number | Description | Published |
20090154201 | ALTERNATING VOLTAGE GENERATOR EQUIPPED WITH A CURRENT LIMITING DEVICE - The invention relates to an alternating voltage generator ( | 06-18-2009 |
20090207542 | VOLTAGE SURGE PROTECTION DEVICE AND ELECTRONIC CIRCUIT COMPRISING ONE SUCH A DEVICE - The voltage surge protection device comprises at least one input designed to be connected to an electric power supply system, at least one output designed to be connected to an electric circuit to be protected, and voltage surge limiting means connected between the inputs and outputs to protect said electric circuit against voltage surges able to be applied on the inputs. The voltage surge limiting means comprise bidirectional series electronic limiting means comprising at least two inputs/outputs connected in series with at least one of said inputs, and which are turned on when a low voltage drop occurs when a circulating current is lower than a current limiting value, and limiting said circulating current by increasing a voltage drop between said inputs/outputs. | 08-20-2009 |
20090290276 | OVERVOLTAGE PROTECTION DEVICE FOR AN ELECTRICAL CIRCUIT - The invention relates to an overvoltage protection device ( | 11-26-2009 |
20090290396 | CAPACITIVE POWER SUPPLY SYSTEM - The invention relates to a power supply system ( | 11-26-2009 |
20110026185 | RELAY SYSTEM COMPRISING TWO JFET TRANSISTORS IN SERIES - A static relay system configured to be connected in series with an electrical load supplied with AC current, including: two series-connected field-effect transistors fabricated in a material having a high bandgap energy; a detector detecting a threshold of a voltage across the terminals of each of the transistors or of the two transistors; an electromechanical relay connected in series with the transistors; and a controller for opening at least one transistor or the electromechanical relay when the threshold voltage is exceeded. | 02-03-2011 |
20140084935 | DEVICE FOR DETECTING A DEFECT IN INSULATION - An electrical power supply includes DC source outputting Vm and a device that detects insulation defects in the DC source. The device includes input terminals connected to the source's terminals, impedances Z1 and Z2 connected in series between the input terminals, where Z1=Z2=Z and Vm/Imax03-27-2014 | |
20140103939 | DETECTION OF AN INSULATION DEFECT - An electrical power supply device includes a DC voltage source with terminals, a controller, and an insulation-defect detecting device for detecting an insulation defect of the voltage source. The device has input terminals connected to source terminals, and circuits connected between respective input terminals and an intermediate point. The insulation-defect current-detection circuit connects between ground and the intermediate point. Both circuits have current-limiter circuits that open and close a connection between respective inputs and the intermediate point. Both current-limiter circuits are rated for traversal by a current of less than a standardized safety threshold when the first current-limiter circuit is closed and one of the terminals of the DC voltage source is shorted to ground. The control circuit is configured to simultaneously keep one current-limiter circuits open and the other closed. | 04-17-2014 |
20140167655 | SECURE BATTERY ELEMENT - A battery element includes series-connected electrochemical accumulators applying a difference in potential between first and second poles, two power output terminals, and a securing device. The securing device comprises first and second switches connected in series between the first and second poles. The first switch is a normally-closed switch, and the second switch is a normally-open switch. The normally-open second switch is configured to selectively isolate/connect the first pole and the first terminal, and the normally-closed first switch being configured to selectively isolate/connect the first and second terminals. The electrochemical accumulators are configured to apply a voltage as a control signal for the normally closed first switch. | 06-19-2014 |
20140300194 | DC VOLTAGE SOURCE INCLUDING ELECTROCHEMICAL CELLS HAVING AN ADAPTIVE VOLTAGE LEVEL - A DC voltage power source, comprising: first electrochemical cells electrically connected in series; a DC/DC converter, the output of the converter being connected in series with said first electrochemical cells, a secondary DC voltage source applying its potential difference to the input of the converter. | 10-09-2014 |
20140354232 | ACCUMULATOR BATTERY PROTECTED AGAINST INTERNAL SHORT CIRCUITS - An accumulator battery, comprising at least: first and second stages electrically connected in series, each stage including at least first to third accumulators electrically connected in parallel. There are at least first and second current limiters via which the first to third accumulators of said first stage are connected in parallel and via which the first to third accumulators of said second stage are connected in parallel. | 12-04-2014 |