| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 307051000 | Circulating- or inter-current control or prevention | 17 |
| 20090008999 | DEVICE MAKING IT POSSIBLE TO SWITCH FROM ONE ELECTRIC SOURCE TO ANOTHER - The present invention relates to a device making it possible to switch from one electric source to another. It comprises two electromechanical relays, each of the two relays being capable of supplying power current coming from one of the two sources. The two relays are connected to one another so that the current supply for controlling one of the relays prevents the current supply for controlling the other relay. | 01-08-2009 |
| 20090121549 | METHOD AND SYSTEM TO CONVERT DIRECT CURRENT (DC) TO ALTERNATING CURRENT (AC) USING A PHOTOVOLTAIC INVERTER - A method to convert direct current (DC) power generated by a photovoltaic (PV) arrays to alternating current (AC) power using a PV inverter, the method includes: applying the DC power generated the PV array to the PV inverter; boosting the DC power from the PV array from a predetermined voltage level to a predetermine DC link voltage, wherein the PV array is regulated by the boosting to output a voltage at the predetermined voltage level; converting the boosted DC power to AC power, and disabling the boost of the power generated by the PV array after the array has a predetermined voltage level at least as great as the DC link voltage. | 05-14-2009 |
| 20100231047 | POWER SAFETY SYSTEM - A power safety system includes a first MOS, a second MOS, a switch and a body controller. The first MOS is connected between a power input and a power output. The second MOSFET is connected between the power output and a charging output. The switch has an end connected to the body of the first MOS, and the opposite end switched between the source and the drain of the first MOS. A body controller controls the switch according to the voltage at the power input and the voltage at the power output, to connect the body of the first MOS to the source or the drain of the first MOS. By switching the switch, the first MOS will have a parasitic diode effective to prevent a reverse current from the power output to the power input. | 09-16-2010 |
| 20110031810 | ELECTRICAL GENERATOR ARRANGEMENTS - An electrical generator arrangement comprising a distribution network having a first generator and a second generator, the first generator arranged to provide electrical power to a transmitter source, the second generator coupled to the distribution network by a switch to enable isolation of the second generator, the switch associated with an electrical characteristic comparator to compare the phase and/or frequency of the voltage provided by the second generator with the incidental modulation of a transmitter signal from the transmitter due to variations in the phase and/or frequency of the voltage provided by the first generator to the transmitter, the comparator arranged to operate the switch to isolate or connect the second generator to the distribution network dependent upon a variation in the change of the phase and/or frequency of the voltage provided by the second generator and the incidental modulation of the transmitted signal. | 02-10-2011 |
| 20110210610 | PHOTOVOLTAIC POWER GENERATION SYSTEM - A photovoltaic power generation system includes: a plurality of units, each of the units being formed with a string, which is a series-connection body of a plurality of solar cell modules, or with a solar cell module; a plurality of connection cables to which the units are each connected such that the units are parallelly connected to each other; a junction box to which each end of the plurality of connection cables is connected; and a failure detection section that performs failure detection and outputs a detection result on a unit-by-unit basis, the failure detection section being located outside the junction box. | 09-01-2011 |
| 20120086274 | CIRCUIT SYSTEM HAVING STANDBY POWER SUPPLY UNIT AND CIRCUIT SYSTEM LAYOUT METHOD - A circuit system layout method for laying out a circuit system has a standby power supply unit. The circuit system includes a core circuit set and a non-core circuit set and operates on power supplied by a power source. The core circuit set is still enabled to finalize a temporary process with the power supplied by the standby power supply unit upon an unexpected interruption of the power supplied by the power source. The core circuit set is connected to an energy storing element for storing and discharging the power, and connected to a one-way element for ensuring that the power stored in the energy storing element is supplied to the core circuit set only. The core circuit set performs the temporary process even when the power source does not enable the circuit system to operate. The circuit system is further provided. | 04-12-2012 |
| 20120091808 | PHOTOVOLTAIC LADDER INVERTER - Techniques for DC-to-AC conversion are disclosed, and may be embodied in a solar inverter device that can operatively couple to a power grid. The device includes a photovoltaic (PV) stack including series-connected PV modules. Each PV module is associated with a capacitor for storing output of that PV module. A positive terminator circuit switches a negative end of the PV stack to ground during positive half of grid cycle, and a negative terminator switches a positive end of the PV stack to ground during negative half of grid cycle. A connecting branch couples each PV module output to a common bus, each branch including control circuitry configured to selectively couple the corresponding PV module output to bus. During a first half of grid cycle, some of the capacitors discharge to the grid while a balance of the capacitors charge in preparation for discharge during a second half of grid cycle. | 04-19-2012 |
| 20120205980 | STAND-ALONE ELECTRIC POWER GENERATION UNIT - A method and apparatus for sustained power self-generation using a reduced drag high efficiency (HE) electric machine are disclosed. Electric power supply having a power level is produced from an electrical generation unit including an HE electric machine and a non-fossil fuel unit such as a hydrogen unit, a hydro unit, a battery, a power grid and so on. Portions of the electric power supply are diverted to the electrical generation unit, another electrical generation unit including an HE electric machine and a non-fossil fuel unit, and a power distribution grid. The HE machines includes a conversion efficiency factor rating of greater than 1 hp of input power to 746 watts of output power. | 08-16-2012 |
| 20130015709 | BACKUP POWER SUPPLY DEVICE, AND POWER OUTPUT METHODAANM Matsunaga; WataruAACI Susono-shiAACO JPAAGP Matsunaga; Wataru Susono-shi JPAANM Katsumata; KazuhiroAACI Gotemba-ShiAACO JPAAGP Katsumata; Kazuhiro Gotemba-Shi JPAANM Yamaguchi; YutakaAACI Tagata-GunAACO JPAAGP Yamaguchi; Yutaka Tagata-Gun JP - A backup power supply device configured to supply an electric power for backup to an optical encoder | 01-17-2013 |
| 20130033108 | POWER SUPPLY CONTROL SYSTEM AND SEMICONDUCTOR INTEGRATED CIRCUIT - The present invention provides a power supply control system and a semiconductor integrated circuit that may prevent reverse current flow from a solar battery to a primary battery. Namely, in a first switching circuit, a first voltage that is the primary battery output voltage dropped by a first voltage level and a second voltage that is the load side voltage dropped by a second voltage level are compared by a comparator. Electrical connection between the primary battery and the load is disconnected when the second voltage is equal to or greater than the first voltage. In a second switching circuit for a solar battery and the load, the switching circuit is similarly switched OFF before the load side voltage exceeds the output voltage of the primary battery or the solar battery, preventing damage to the battery due to reverse flow of current. | 02-07-2013 |
| 20130076138 | Cell parallel device - The invention related in cell parallel device is a circuit of SCR S | 03-28-2013 |
| 20130264874 | METHOD AND SYSTEM FOR ISLAND DETECTION AND ANTI-ISLANDING PROTECTION IN DISTRIBUTED POWER GENERATION SYSTEMS - An effective, yet relatively simple and inexpensive, method for detection of islanding in distributed power generation systems. Statistical analysis of the local line frequency, as measured at the distributed generator, is performed to detect when an island has been formed. The statistical characteristics of the local frequency are controlled by the grid when the distributed generator is not islanding. When an island is formed, however, frequency control switches to circuitry associated with the distributed generator. Because the statistical characteristics of the frequency control performed by the distributed generator are markedly different from those of the grid, the islanding condition can be detected and corrected. | 10-10-2013 |
| 20130285453 | METHOD AND APPARATUS FOR SEAMLESS POWER TRANSFER - A seamless power transfer apparatus comprising a solar grid and a utility power grid. The apparatus comprises a smart switch electrically connected to the solar grid and to the utility grid. The smart switch does not allow the solar grid to supply power to the utility power grid at any time. | 10-31-2013 |
| 20150303696 | Power Generation and Control System - A power generation and control system is easily installed in a consumer household, a business, or and end-user establishment for generating power and preventing power from flowing to a power grid from a consumer circuit during a power outage. A communications transceiver is adapted to transmit an enabling signal for enabling power generation only after the control system has been installed. The control system can be adapted to replace an existing circuit breaker in a household circuit box and prevents power from traveling from consumer power generators to the grid during a power outage. In the same manner that end-users can add appliances to existing circuits, end-users can easily add additional power generation devices without hiring a professional electrician and without worrying about causing harm to utility workman during power outages. | 10-22-2015 |
| 20150349530 | USER CONFIGURABLE ELECTRICAL SUBPANEL SYSTEM WITH BACK FEED PREVENTION - In various embodiments, an electrical subpanel system is disclosed. The subpanel system may include a DC/AC inverter configured to accept a DC electrical input and to provide an auxiliary AC current output; a quick-disconnect coupling, a busbar connected between the auxiliary AC current output and the quick-disconnect coupling, a receptacle for connecting to at least one electrical device coupled in parallel to said busbar, where the quick-disconnect coupling may be configured to be selectively connected to a mains branch circuit current. | 12-03-2015 |
| 20150357822 | INVERTER ELECTRIC GENERATOR SYSTEM AND INVERTER ELECTRIC GENERATOR THEREOF - An inverter electric generator system is comprised of: master and at least one slave inverter generators, each inverter generator including a communication section, a controller section generating a PWM carrier and an inverter circuit switched by the PWM carrier to generate an alternative current with a controlled voltage and a controlled frequency, the communication sections being mutually connected to exchange a communication data, and the inverter circuits being connected in parallel so as to collect and output the alternative currents as an electric power output, wherein each of the controller sections is configured to synchronize any point of the PWM carrier with any bit of the communication data received by the communication section. The PWM carriers of the master and the slave inverter generators thereby mutually get synchronized. | 12-10-2015 |
| 20180026450 | POWER CONTROL APPARATUS, POWER CONTROL SYSTEM, AND POWER CONTROL METHOD | 01-25-2018 |
