Class / Patent application number | Description | Number of patent applications / Date published |
307103000 | WITH LINE DROP COMPENSATION | 11 |
20090115254 | Systems and Methods for Voltage SAG Compensation - A voltage sag compensation system includes a capacitor charging and discharging module connected to an AC rectifier and to an inverter, a two stage voltage detector configured to detect a degree of voltage sag that is present on a power line, and an inverter gating module selectively connectable to the power line in response to the two stage voltage detector and configured to provide gating signals to the inverter. The system further includes a low DC bus switch out module configured to monitor an output voltage of the capacitor charging and discharging module and to disable the inverter gating module from providing the gating signals to the inverter when voltage associated with the capacitor charging and discharging module falls below a predetermined value. | 05-07-2009 |
20090134709 | System and method for cable resistance cancellation - A method for cable resistance cancellation. A single remote sense line and a simple cable resistance cancellation network are leveraged in a power supply unit to compensate for the total cable voltage drop, while maintaining tight output accuracy. By completely compensating for the voltage drops, the wire gauge for the main power wires can be reduced, thereby allowing the use of smaller diameter cables. | 05-28-2009 |
20100007213 | ACCUMULATOR - DC blocking capacitor and resistor are coupled in series with electricity storing section at its both ends, and ON/OFF circuit is coupled in parallel with resistor. Peak voltage holding circuit is coupled in parallel with ON/OFF circuit, and current sensing section is coupled in series with storing section, and an output from current sensing section is supplied to peak current holding circuit. In the structure of the storage device discussed above, a flowing direction of an electric current from a positive electrode to a negative electrode of storing section is referred to as a positive direction. ON/OFF circuit is controlled such that circuit is turned on when the current flows in a negative direction, and such that it is turned off when the current flows in the positive direction. An internal resistor of storing section can be found based on a peak voltage resulting from the control and held by circuit and a peak current resulting from the control and held by circuit. A degree of degradation of electricity storing section is determined with this internal resistor. | 01-14-2010 |
20100181840 | CABLE COMPENSATION - This invention generally relates to cable compensation, and is particularly applicable to cable compensation for an AC-DC voltage converter. In one embodiment, a cable compensation apparatus for compensating voltage drop of a cable connected between an electrical power supply and an electrical device comprises: a first capacitor; a timer circuit to time a predetermined time period; a current source to supply to said first capacitor during substantially said predetermined time period a first current substantially proportional to an output current outputted by the power supply to the cable; and a control circuit to adjust an output voltage outputted by said power supply to said cable dependent on a voltage on said first capacitor. The compensation in some embodiments is programmable by means of a discrete capacitor component. | 07-22-2010 |
20130278069 | POWER SUPPLY SYSTEM - Provided is a power supply system which is capable of controlling a power receive device to have an input voltage or an input current at a predetermined input setting value even when a power supply device and the power receive device are connected to each other with an arbitrary power cable. The power receive device detects the input voltage or the input current inputted through the power cable and transmits a detected input voltage or input current as power-receive side information to the power supply device through the power cable. The power supply device controls the output value of an output voltage or an output current to be outputted to the power cable based on the power-receive side information received through the power cable so that the input voltage or the input current to be inputted to the power receive device is converged on a predetermined input setting value. | 10-24-2013 |
20150015078 | Cable and compensation method for transmitting high speed signal and delivering power - The present specification provides a cable and a compensation method for transmitting a high speed signal and delivering power. The cable according to one embodiment disclosed in the present specification interconnects a first device and a second device, the cable comprising: a power line for transmitting power from the first device to the second device; and a voltage restorer for restoring voltage loss of the power receiving side of the second device generated based on the voltage drop relevant to the power line. | 01-15-2015 |
20150333514 | CABLE DROP COMPENSATION CIRCUIT AND POWER CIRCUIT USING THE SAME - A cable drop compensation circuit includes a current detection circuit, a compensation judgment circuit, and a compensation circuit. The current detection circuit detects a load current supplied to a load by a DC output circuit, so as to generate a current detection signal. The compensation judgment circuit receives the current detection signal, and generates a judgment signal when judging the load current higher than a predetermined compensation value. When receiving the judgment signal, the compensation circuit generates a compensation signal. In response to the compensation signal, the DC output circuit raises an output voltage by a compensation voltage. | 11-19-2015 |
20150364910 | THERMAL POWER GENERATION APPARATUS AND THERMAL POWER GENERATION SYSTEM - A thermal power generation apparatus includes a control circuit that selects a single operation mode from among a plurality of modes including a normal mode and a specific mode on the basis of a voltage in a commercial system. The normal mode is an operation mode in which alternating-current power output from an inverter is adjusted so that a direct-current voltage in a direct-current power line follows a target voltage. The specific mode is an operation mode in which direct-current power absorbed by an electric power absorber and/or the amount of heat per unit time supplied to a heat engine are/is adjusted so that the direct-current voltage follows the target voltage. | 12-17-2015 |
20150364920 | SYSTEMS AND METHODS FOR IMPROVING THE ROTOR ANGLE STABILITY OF SYNCHRONOUS GENERATORS - Provided is a power plant that is connected to a transmission grid. The power plant includes a synchronous generator and a synchronous condenser connected in parallel. The power plant is configured to increase the rotor angle stability of the synchronous generator to ride through fault conditions and frequency deviations on the transmission grid. | 12-17-2015 |
20160099561 | POWER DISSIPATING ARRANGEMENT IN A WIND TURBINE - A power dissipating arrangement for dissipating power from a generator in a wind turbine is provided. The generator comprises a plurality of output terminals corresponding to a multi-phase output. The power dissipating arrangement comprises a plurality of dissipating units, a plurality of semiconductor switches, a trigger circuit for switching the semiconductor switches and a control unit for controlling the operation of the trigger circuit, thereby controlling the switching of the semiconductor switches. | 04-07-2016 |
20160172842 | POWER GENERATION SYSTEM AND METHOD WITH RESISTIVE BRAKING CAPABILITY | 06-16-2016 |