225results about How to "Efficient power supply" patented technology

System and method for improving efficiency in driving LEDs. A preferred embodiment comprises a switch current regulator coupled to a current control signal input, the switch current regulator to control an amount of current provided to the LED based upon a magnitude of a voltage on the current control signal input, a switching voltage regulator coupled to the switch current regulator and the LED, the switching voltage regulator to provide current to the LED, and a sensor coupled to the switch current regulator, the LED, and a signal feedback circuit, the sensor to measure status information regarding the switch current regulator and the LED and provides the information to a controller, wherein the status information can be used to adjust the current on the current control signal input.

An Electronic House Arrest Monitoring (EHAM) system of the present invention includes a transmitter attached to a monitored offender and a receiver positioned in the vicinity of the desired monitoring location. The transmitter and the receiver each have a pattern stored or generated therein for determining the interval of time between signal transmissions and receptions. The pattern is pseudo-random to offer improved protection against imposter transmitters, in other words the time intervals are selected to be unequal and randomly varying but the pattern is repeated or cycled to allow continuing signal transmission by the transmitter. The transmitter transmits signals at varying time intervals according to this pattern, and the receiver authenticates signals it receives as coming from the monitored transmitter based on the expected time intervals from the pattern. The pattern may include any number of time intervals and, in one embodiment, includes more than one subpattern to extend the length of the repeat cycle to increase the difficulty of defeating the monitoring system. As further protection against imposter devices, the receiver may verify the signals based on information unique to the transmitter included in each signal. The receiver may further use the received signals and unique time interval patterns to determine a number of operating states, including New Transmitter ID Received, Transmitter In Range and Locked to Transmitter, Transmitter In Range and Not Locked, Transmitter Out of Range, and Imposter Likely. The monitoring system may also include a remote host computer linked to the receiver or receivers to enable these operating states to be monitored remotely by enforcement personnel.

The server uninterruptible power supply is housed inside the server case 91, and is connected to the 12V DC power supply line 43 of the server 90. The uninterruptible power supply is provided with a DC/DC boost converter 3 that steps-up the power supply line 43 voltage to the rechargeable battery 1 charging voltage, rechargeable batteries 1 having a specified voltage of 13V to 60V, a DC/DC step-down converter 2 that steps-down the rechargeable battery 1 voltage to the voltage of the power supply line 43, and a charging and discharging control circuit 4 that controls the DC/DC boost converter 3 and the DC/DC step-down converter 2. In the event of commercial power source 95 outage, the uninterruptible power supply steps-down the rechargeable battery 1 output voltage to the voltage of the power supply line 43 and outputs that voltage to maintain operation of the server 90.

A remote power supply arrangement for graphical display systems. The remote power supply places one or more power supplies in a separate location, some distance apart from the graphical display, rather than within the display cabinet or module itself. Power is then transferred from the power supply to the display by electrical cords. The remote power supply provides lighter weight displays, less noise near the displays, and improved maintenance and repair. The invention includes apparatus, methods of providing remote power to displays.

A wireless power feeding system includes a power feeding device and a power receiving device. The power feeding device includes a first resonance coil connected to a high-frequency power source through a first matching circuit, and a first control circuit connected to the first matching circuit and a first transmitter-receiver circuit. The power receiving device includes a second resonance coil configured to be in magnetic resonance with the first resonance coil, and a second control circuit connected to a load, a second matching circuit, and a second transmitter-receiver circuit.

In an AC link type boosting device, DC terminals of two voltage inverters are connected each other in series in additive polarity and plural AC terminals of each of the voltage inverters are connected to a transformer. The two voltage type inverters are AC linked to each other via the transformer. An external voltage applied between the DC terminals of the AC link type booster is divided by the voltage-type inverters.

An uninterruptible power supply apparatus includes a power supply unit converting AC power to generate a DC voltage to be supplied to a loading device. The uninterruptible power supply apparatus further includes a first battery unit connected to the power supply unit to receive a DC current therefrom, and stores first DC power generated from the DC voltage. The first battery unit generates a DC voltage to be supplied to the loading device from the first DC power. The uninterruptible power supply apparatus includes a second battery unit connected in parallel to the power supply unit and stores second DC power, and generates, from the second DC power stored in the second battery unit, a DC voltage to be supplied to the loading device. The uninterruptible power supply apparatus further includes a controller for controlling operation of the power supply unit, the first battery unit and the second battery unit.

A resonant power feeding system that can provide high power transmission efficiency between a power feeding device and a power reception device without dynamically controlling the oscillation frequency in accordance with the distance between the power feeding device and the power reception device. High power transmission efficiency between the power feeding device and the power reception device is obtained by addition of a structure for adjusting the matching condition to both the power reception device and the power feeding device. Specifically, a transmission-reception circuit and a matching circuit are provided in both the power reception device and the power feeding device, and wireless signals for adjusting the matching circuit are transmitted and received through a resonant coil. Thus, the power feeding device can efficiently supply power to the power reception device without adjusting the oscillation frequency.

The invention discloses a photovoltaic micro power source control system for a micro grid, which comprises a photovoltaic micro power source main circuit which respectively accesses the micro grid and a load through a solid-state switch STS, and a photovoltaic micro power source controller which is connected with the photovoltaic micro power source main circuit through a drive board, wherein the photovoltaic micro power source controller comprises a highest power spot tracking control module, an active and passive power computation module, a storage battery charging and discharging control module, a power angle control module, a passive power-voltage control module and a PWM generator. The photovoltaic micro power source control system for the micro grid specially controls a photovoltaic micro power source to connect into the micro grid, and ensures the stability so as to effectively realize the high-efficient, environment-friendly and high-quality power supplying micro grid and beneficially complement a large power system.

A regenerative integrated actuation system and method are provided to efficiently supply power to a plurality of actuators and to make efficient use of power regenerated by the actuators. The system may include a plurality of actuators in communication with a power distribution system. Each actuator may include an energy storage element. The system may also include a controller for determining if a respective actuator is in a consumption mode or a regenerative mode. If in the consumption mode, the controller may determine whether the respective actuator should draw power from an energy storage element or from the power distribution system. Conversely, if in the regenerative mode, the controller may determine whether any excess power from the respective actuator should be provided to one of the actuators, such as to another actuator which is in the consumption mode or to the energy storage element associated with the respective actuator.

The present invention discloses an LED lighting apparatus. The LED lighting apparatus includes a converter for transforming rectified voltage in accordance with a switching operation according to a driving pulse and outputting the transformed voltage, a current regulator for generating the driving pulse having a pulse width varied in response to a control signal and the amount of current of the converter and switching the operation of the converter using the generated driving pulse, and a peripheral circuit module for providing the control signal for controlling the dimming of an LED lighting.

A cell unit includes a fuel cell capable of generating power by a chemical reaction, a secondary battery capable of being repetitively charged and discharged, a DC/DC converter which DC/DC-converts power output from the fuel cell and outputs power, the DC/DC converter monitoring an output voltage of a cell in the fuel cell and dropping an output voltage of the DC/DC converter when the monitored output voltage of the cell reaches not more than a predetermined value, and a diode OR circuit which selectively acquires power according to a load to which the power is supplied, from power output from the DC/DC converter and power output from the secondary battery, and outputs the acquired power.

A process for manufacturing a semiconductor device of the trench variety with reduced feature sizes and improved characteristics which process includes forming a termination structure having a field oxide disposed in a recess below the surface of the semiconductor die in which the active elements of the device are formed, and forming source regions after the major thermal steps have been performed.

The invention discloses a device used for controlling the switch of a main power supply and a backup power supply. The device comprises a main circuit power switch module, an over-voltage and under-voltage detecting module, a backup starting module and a backup control module. The invention also discloses a method used for controlling the switch of the main power supply and the backup power supply. The proposal of the embodiment of invention leads to a more perfect switch control of the main power supply and the backup power supply.

An electronic apparatus, capable of efficiently supplying power in accordance with execution process analysis of the electronic apparatus and classification of externally connected external equipment, includes an equipment connection section for connecting with multiple external equipments, a process judgment section for making a judgment as to a process to be performed by the electronic apparatus, an equipment selection section for selecting external equipment based on the judgment result of the process judgment section, and a power supply section for supplying power to the external equipment selected by the equipment selection section.

A cluster system includes a plurality of blade servers including at least one auxiliary blade server, the rest of the blade servers being used for actual operation of the cluster system, a power-supply unit supplying electrical power to each of the blade servers, a power-supply controller which controls on/off in supplying electrical power to each of the blade servers from the power-supply unit, and a blade server monitoring unit which monitors whether there occurs any trouble in each of the blade servers. The power-supply controller, when the blade server monitoring unit finds a trouble in any one of the blade servers, stops power-supply to a blade server in which the trouble was found, and turns the auxiliary blade server into a blade server to be used for actual operation of the cluster system, in place of the blade server in which the blade server monitoring unit found a trouble.

An integrated power and attitude control system and method for a vehicle efficiently supplies electrical power to both low voltage and high voltage loads, and does not rely on relatively heavy batteries to supply power during the vehicle initialization process. The system includes an energy storage flywheel, and a solar array that is movable between a stowed position and a deployed position. The energy storage flywheel is spun up, using electrical power supplied from a low voltage power source, to a rotational speed sufficient to provide attitude control. Then, after the solar array is moved to its deployed position, the energy storage flywheel is spun up, using electrical power supplied from a second power source, to a rotational speed sufficient to provide both attitude control and energy storage.

A power feeding system is provided, in which a detected value of reflected power at a power supply device in a power feeding installation is sent from the power feeding installation to a vehicle via a first communication device, the vehicle has an impedance matching device for adjusting an impedance at a resonance system that is constituted of a power transmission resonator, including a primary self-resonant coil and a primary coil in the power feeding installation, and a power receiving resonator, including a secondary self-resonant coil and a secondary coil in the vehicle, and the impedance matching device is controlled based on the detected value of the reflected power at the power supply device, which has been received from the power feeding installation.

The present disclosure relates to an RF power amplifier (PA) power supply that includes a series pass circuit coupled across a direct current (DC)-to-DC converter to receive a power supply input signal, such as provided from a battery, to provide a power supply output signal to at least a first RF PA based on an output setpoint. Control circuitry selects between a switching supply operating mode and a non-switching supply operating mode based on the output setpoint. During the switching supply operating mode, the DC-to-DC converter provides the power supply output signal and during the non-switching supply operating mode, the series pass circuit provides the power supply output signal.

A more efficient power supply unit and a method for supplying power using same are disclosed. The power supply unit comprises a relay for switching alternating current power supplied from a plurality of sources; a direct current power supply for converting the switched current power to direct current power; and a controller for generating a switch signal to control the relay to switch the sources on the basis of the result for monitoring the alternating current power supplied from the sources.

The invention discloses a method for reliably connecting a flexible thin-film solar cell and an airship envelop. According to the method, solar cells are interconnected through brocade silk ropes which penetrate through stainless steel buttonholes, thereby realizing assembly in an array manner; the solar cells and lateral connecting cord fabrics welded on the airship envelop are connected with each other through the brocade silk ropes which penetrate through the stainless steel buttonholes, thereby realizing the reliable connection between a solar cell array and the envelop; and a multi-layer thermal insulation assembly is closely connected with the airship envelop by employing nylon fasteners (groups), thereby realizing the isolation of waste heat of the solar cells and solving the problem of thermal coupling between the solar cells and the airship envelop. The connecting method can be widely applied to various airship platforms which generate power by solar energy and has wide military and civil application prospect.

Provided is a water treatment method and a water treatment apparatus for elctrolyzing the water to be treated by detecting the quality and quantity of the water to be treated and adjusting the electrolytic density according to the state of the water to be treated. When sewage is treated by immersing electrodes 11A, 12A, 11B, 12B, 11C and 12C for electrolysis in an electrolytic cell 15 in a sewer pipeline 1 and producing hypo-halogenous acid, ozone or active oxygen in the sewage, the states of the sewage before and/or after the treatment are detected with a flow rate sensor 16 and a turbidity sensor 17, and the number of the electrodes to be energized (the area to be energized) and/or electric power to be supplied to each of the electrodes are controlled according to the detection result.