Patent application number | Description | Published |
20110291635 | ELECTRONIC CIRCUIT - An electronic circuit including a first electronic sub-circuit having an operating voltage that is higher than a supply voltage provided by a voltage source, and a second electronic sub-circuit that is coupled to the voltage source and to a first voltage input of the first electronic sub-circuit. The second electronic sub-circuit includes a short-time voltage boosting circuit that is adapted to provide a voltage at the first voltage input for a period long enough to enable a start-up of the first electronic sub-circuit when the short-time voltage boosting circuit is triggered and a controllable voltage boosting circuit that is adapted to provide a boosted voltage at the first voltage input. The controllable voltage boosting circuit is coupled to a control output of the first electronic sub-circuit to receive a control signal, and the period the short-time voltage boosting circuit provides a voltage at the first voltage point is long enough to start the control of the controllable voltage boosting circuit by the first electronic sub-circuit. | 12-01-2011 |
20120234658 | BUTTON ASSEMBLY FOR DISPLAYING AN ILLUMINATED SYMBOL - A button assembly for displaying an illuminated symbol with a locking ring having an outer surface. A solid light guide is positioned within and spaced apart from the locking ring. The light guide has a top surface for displaying an illuminated symbol and a bottom surface with a light receiving member having a refracting surface with a first lens member for receiving and directing light to the top surface of the light guide. A resilient sealing member is mounted on the locking ring and interconnects the locking ring and the light guide. The sealing member has an unsupported portion that facilitates movement of the light guide relative to the locking ring. | 09-20-2012 |
20130069606 | DC Converter with Adjustable Output Voltage - The present invention relates to a dc converter whose output voltage is adjustable. The dc converter has
| 03-21-2013 |
20140290452 | Male Dry Shaver - An electrically driven shaver comprises a housing and at least one hair cutting element that is driven by an electromotor. A thermoelectric skin cooling element and the electromotor are electrically operable by a microcontroller and an on/off switch which is electrically connected with the microcontroller. The microcontroller is adapted to activate and deactivate operation of both the electromotor and the skin cooling element. The skin cooling element is located adjacent to the hair cutting element. The microcontroller is adapted to immediately deactivate operation of the electromotor and relative to that to deactivate operation of the skin cooling element at later point of time, both in response to the “off” actuation of the same on/off switch. | 10-02-2014 |
Patent application number | Description | Published |
20080290252 | Power matching method - A method of matching the power of a photovoltaic system producing electric energy by which a working point at which the system produces maximum power is set by changing the working point in an MPP matching process and by comparing the system power, which changes as a result thereof, is intended to be suited both for stationary characteristic curves and for non stationary generator characteristic curves and to be easy to carry out so that the best working point is always set, even when the system is subjected to external interfering factors. This is achieved in that one or several additional control steps or control cycles are performed in order to track during the matching process a power point changing under external impact for a working point of even higher power to be set. | 11-27-2008 |
20080291609 | Inverter - The subject matter of the invention is an inverter including a casing ( | 11-27-2008 |
20090315404 | SOLAR POWER PLANT - A solar power plant with a plurality of photovoltaic modules for generating a power to be fed in a multi-phase grid, several photovoltaic strings, which are allocated to different phases, being connected to a primary side of a mains transformer and at least one inverter for converting the direct voltage generated by the photovoltaic modules into an alternating mains voltage conforming to the grid being provided and said mains transformer being provided with a neutral conductor and with a grounded terminal, is intended to be improved in such a manner that the life of the photovoltaic modules, in particular in case of thin-film modules, is increased, allowing for high conversion efficiency of the inverters at low wiring costs. This is achieved in that an additional direct voltage source is inserted between the neutral conductor and ground in such a manner that the potential of the photovoltaic strings is displaced and that a bias voltage is set, which is different from zero volt. | 12-24-2009 |
20110298292 | PHOTOVOLTAIC SYSTEM FOR FEEDING THREE-PHASE CURRENT INTO A POWER GRID - The invention relates to a photovoltaic system for feeding three-phase current to a power grid that includes several monophase or three-phase photovoltaic inverters that can be connected to the power grid at the output end and are each fitted with a disconnecting device at the output end. The system includes several photovoltaic generators that are connected to the input end of the photovoltaic inverters. A central control and monitoring unit is connected between the photovoltaic inverters and the power grid. The control and monitoring unit has a grid monitoring device at the feeding point to the grid to measure one or more grid parameters. At least one communication link is provided between the individual photovoltaic inverters or the individual disconnecting devices and the connected central control and monitoring unit such that the connecting devices can disconnect the individual photovoltaic inverters from the power grid by means of a control instruction signal of the communication link. The central control and monitoring unit includes a load unbalance recognition component and a load unbalance regulation component, wherein the regulation includes limiting the power variation between the individual phases to a predetermined value. | 12-08-2011 |
20120001491 | Device and Method for Generating Alternating Current - A solar power plant includes at least one photovoltaic module for generating power to be fed in a multi-phase grid. At least one inverter is provided for converting a direct voltage generated by the at least one photovoltaic module into an alternating mains voltage. A mains transformer is coupled to receive the alternating mains voltage from the inverter. The inverter is coupled to a primary side of the mains transformer. A direct voltage source coupled between an output of the at least one inverter and an input of the mains transformer such that a potential of the at least one photovoltaic module is displaced and that a bias voltage is set which is different from zero volts. | 01-05-2012 |
20120039101 | Method of and Apparatus for Connecting a Photovoltaic Device to an AC Power Grid - A method of connecting a photovoltaic device to an AC power grid through an inverter includes monitoring a DC voltage at an input of an inverter, and activating the inverter when the monitored DC voltage exceeds a first predetermined threshold. The method further includes synchronizing an output voltage of the inverter with a grid voltage, connecting an output of the inverter to the AC power grid upon synchronization if the monitored DC voltage exceeds a second predetermined threshold, and deactivating the inverter if a detected power being fed through the inverter falls below a predetermined power threshold while maintaining the connection between the output of the inverter and the AC power grid. Lastly, the method includes disconnecting the output of the deactivated inverter from the grid if the monitored DC voltage falls below a third predetermined threshold. Further, an apparatus that performs such functionality is also provided. | 02-16-2012 |
20130057989 | METHOD FOR LIMITING THE GENERATOR VOLTAGE OF A PHOTOVOLTAIC INSTALLATION IN CASE OF DANGER AND PHOTOVOLTAIC INSTALLATION - A protection system configured to couple between a generator that has a number of partial strings and an inverter includes a control device, and a series-connection switching device configured to selectively connect the partial strings together in series. The system also includes a parallel-connection switching device configured to selectively connect the partial strings together in parallel, wherein the series-connection switching device is actuated by the control device such that it interrupts the series connection of the partial strings in case of a hazard, and the parallel-connection switching device is actuated by the control device such that it connects the partial strings together in parallel in case of a hazard. | 03-07-2013 |
20130058140 | METHOD FOR LIMITING THE GENERATOR VOLTAGE OF A PHOTOVOLTAIC INSTALLATION IN CASE OF DANGER AND PHOTOVOLTAIC INSTALLATION - An inverter operable to interface with a generator that has a number of partial strings includes an inverter bridge circuit configured to connect to the partial strings, and a control device operably associated with the inverter bridge circuit. The inverter further includes a series-connection switching device configured to selectively connect the partial strings in series in response to a control signal from the control device such that the series-connection switching device interrupts the series connection of the partial strings in case of a hazard condition detected by the control device. | 03-07-2013 |
20130147275 | INVERTER WITH AN AC INTERFACE FOR THE CONNECTION OF AC MODULES - An inverter for feeding a grid-compatible AC voltage into a grid is described, wherein the inverter includes an inverter bridge for converting a DC voltage to a first AC voltage and a grid interface between the inverter bridge and the grid for converting the first AC voltage to the grid-compatible AC voltage for feeding into the grid. An AC interface via which an AC module for feeding into the grid can be connected, is arranged between the inverter bridge and the grid interface. | 06-13-2013 |
20130335861 | Method and System for Detecting an Arc Fault in a Power Circuit - The method of detecting an arc fault in a power circuit includes determining a first signal related to current flowing in the power circuit is determined and analyzing the first signal to determine whether the signal indicates the presence of an electric arc in the power circuit. In case the first signal indicates the presence of an electric arc in the power circuit, means for suppressing an electric arc are activated. A second signal related to current flowing in the power circuit is then determined and analyzed. An occurrence of an arc fault in the power circuit is signaled if the second signal does not indicate the presence of an electric arc. The system for detecting an arc fault is designed to perform a corresponding method. | 12-19-2013 |