592results about How to "Increased power capacity" patented technology

A system and method of reactive power regulation in a wind farm having a plurality of wind turbines that provides optimum control of the reactive power compensation in the wind farm and is able to keep a reactive power reserve in order to support eventual grid contingencies.

A high efficiency, low maintenance single stage or multi-stage centrifugal compressor assembly for large cooling installations. The assembly is highly efficient by virtue of a variable frequency drive (VFD) that drives a permanent magnet motor and matches compressor speed with compressor load, a direct drive impeller that eliminates gearing losses, and magnetic bearings that reduce frictional losses. The back-emf produced by the motor provides an intermediate power source for the magnetic bearings in the event of a loss of electrical power. A cooling system provides direct cooling of the rotor with gas refrigerant, and cooling of the stator with liquid refrigerant. Modular construction allows the compressor to be retrofit with upgrades. An inlet guide vane system operates without need for oil lubrication. The use of light metal castings and elimination of gearing reduces the weight to one-third or less of comparably powered conventional units.

The battery charger is modular and reconfigurable. It includes charging modular power stages that are configured to receive an alternating current (AC) input and provide a direct current (DC) output for charging a battery. These modular power stages include an inverter coupled to a rectifier circuit that outputs a battery charging current. The modular power stages can also each include a current mode controller coupled to the output of the rectifier circuit and configured to provide a current control signal for the modular power stage, a voltage mode controller coupled to the output of the rectifier circuit and configured to provide a voltage control signal for the modular power stage, and a droop sharing control and configured to ensure current sharing between a plurality of modular power stages under constant voltage operation. A system controller is configured to interface with the modular power stages.

A method for controlling and addressing a battery power source device having a plurality of battery pack systems connected in parallel or serially in parallel, each battery pack system having a battery pack block and a battery ECU connected thereto, is provided. The battery ECUs are connected to each other over communication lines, and a plurality of address setting terminals and address lines are connected to each other differently to provide a unique address to each battery ECU. When an abnormal state is detected in one of the battery pack blocks over the communication line, control is provided to the abnormal one of the battery pack blocks, identified by its address, to turn off its open/close relay contact to disconnect it from the parallel or the serial parallel connection, thereby preventing the function of the entire battery power source device from being stopped or degraded.

Magnetic component assemblies including moldable magnetic materials formed into magnetic bodies, at least one conductive coil, and termination features are disclosed that are advantageously utilized in providing surface mount magnetic components such as inductors and transformers.

Magnetic component assemblies including moldable magnetic materials including surface mount termination features, as well as manufacturing methods therefor, are disclosed that are advantageously utilized in providing surface mount magnetic components such as inductors and transformers.

An electrically variable transmission includes a power source, three differential gear sets, first and second motor/generators each connected to at least one of the gear sets, and torque-transmitting mechanisms. An input member transfers power from the power source through the differential gear sets to an output member. The torque-transmitting mechanisms are selectively engageable to provide an input-split first electrically variable mode having equal forward and reverse speed ratios for given input speeds and a compound, power-split second electrically variable mode. Torque provided from the power source is added to torque provided from the second motor generator in both forward and reverse electrically variable modes.

An electrically variable transmission includes a power source, three differential gear sets, first and second motor/generators each connected to at least one of the gear sets, and torque-transmitting mechanisms. An input member transfers power from the power source through the differential gear sets to an output member. The torque-transmitting mechanisms are selectively engageable to provide an input-split first electrically variable mode having equal forward and reverse speed ratios for given input speeds and to provide substantially equal fixed forward and reverse speed ratios.

A radiation emitting device of the present invention includes at least one radiation emitter, first and second electrical leads electrically coupled to the radiation emitter, and an integral encapsulant configured to encapsulate the radiation emitter and a portion of the first and second electrical leads. The encapsulant has at least a first zone and a second zone, where the second zone exhibits at least one different characteristic from the first zone. Such different characteristics may be a physical, structural, and/or compositional characteristic. Preferably, the at least one different characteristic includes at least one of the following: mechanical strength, thermal conductivity, thermal capacity, coefficient of thermal expansion, specific heat, oxygen and moisture impermeability, adhesion, and transmittance with respect to radiation emitted from the radiation emitter. The radiation emitter may be in a form of an emitter, and is preferably an LED.

A method for integrating photovoltaic module includes providing a cover plate having a first surface and a second surface opposed to the first surface and supplying photovoltaic devices respectively formed on substrates. The photovoltaic devices include photovoltaic cells electrically coupled to each other, and each cell is characterized by a thin-film photovoltaic layer sandwiched between a first electrode material and a second electrode material. The first electrode material overlies the substrate and the second electrode material overlies the thin-film photovoltaic layer. The method further includes disposing the solar devices side by side to laminate with the cover plate by means of a first organic material filled between the second electrode material and the second surface. Each of the solar devices has a peripheral edge region being sealed by a second organic material. The method further includes electrically coupling the solar devices to each other.

The invention discloses an electric field coupled power transfer system and a control method based on the novel topology. The system comprises a high-frequency inverter, a high-frequency resonator, an electric field coupling mechanism and an electric energy conversion link, and is characterized in that the high-frequency inverter is a double-E type amplifying high-frequency inverter, a high-frequency transformer is arranged between the high-frequency inverter and the high-frequency resonator, the high-frequency resonator is further connected with a controller, and the output end of the controller is connected with an inductance compensation tuning module and a drive circuit. The electric field coupled power transfer system has the obvious effects that the high-frequency voltage at the two ends of a coupling mechanism is increased, the strength of an electric field is enhanced, the transmission distance is lengthened, the voltage at the two ends of a high-frequency switch tube is increased to meet the requirement of high-frequency power electronic devices at the present stage, the power capacity of the system is improved, the voltage of the switch tube is reduced, the switch loss is reduced, and the adaptive ability of the system is improved.

An improved air tool includes an integrated air motor and electrical generator wherein the stator is positioned on a side of the rotor body opposite the working end of the tool to reduce vibrations transmitted to the stator. The stator is also positioned between the compressed air inlet and the rotor body such that compressed air flows across the stator to prevent overheating of the stator. The air tool includes an indicating circuit connected to the battery charging circuit for indicating a battery charge condition, a battery discharge condition, and a low lubrication condition of the air vanes. A light ring assembly is attached to the working end of the tool housing to provide light at the working end of the tool. Materials chosen for the magnets and the poles of the stator increase the power capability of the electrical generator. An illuminating apparatus for a conventional air tool includes a light ring with integral generator.

A high power high temperature superconductive circuit for use in various microwave devices including filters, dielectric resonator filters, multiplexers, transmission lines, delay lines, hybrids and beam-forming networks has thin gold films deposited either on a substrate or on top of the high temperature superconductive film. Alternatively, other metal films can be used or a plurality of dielectric films can be used or a dielectric constant gradient substrate can be used. The use of these materials in a part or parts of a microwave circuit reduces the current density in those parts compared to the level of current density if only high temperature superconductive film is used. This increases the power handling capability of the circuit.

The invention provides a radio frequency MEMS (micro-electromechanical system) switch and a forming method thereof. The switch comprises a substrate, a barrier layer formed on the substrate, a drive electrode, a microwave signal coplanar waveguide transmission line and a metal cantilever beam arm formed on the microwave signal coplanar waveguide transmission line, the drive electrode and the microwave signal coplanar waveguide transmission line are formed on the substrate, the microwave signal coplanar waveguide transmission line is provided with a switch contact point and an anchor region, the position of the switch contact point corresponds to a free end of the metal cantilever beam arm, the anchor region corresponds to a fixed end of the metal cantilever beam arm, and the switch contact point is composed of a copper film and a graphene film formed on the copper film. When the drive electrode is not applied with drive voltage, the metal cantilever beam arm is disconnected with the switch contact point to enable the switch to be off, and when the drive electrode is applied with drive voltage, electrostatic force is generated between the metal cantilever beam arm and the drive electrode, and the metal cantilever beam arm is enabled to bend to contact with the switch contact point so as to enable the switch to be on. The switch and the method have the advantages of lower thermal failure and high power capacity of the switch.

A high-density power converter that benefits from improved packaging techniques and thermal handling capability is provided. The power converter includes a magnetic core. The converter further includes a printed circuit board providing at least one cutout for receiving a portion of the magnetic core. A circuit is magnetically coupled to the magnetic core. A stopper is configured at an edge of the cutout proximate to the circuit to hold the magnetic core at a predefined distance relative to the circuit, thereby meeting a safety distance requirement between the core and the circuit. Advanced thermal management is provided by way of a heatsink assembly to enhance the thermal-handling capability of the converter.

The invention relates to a cavity type film bulk acoustic resonator, comprising a substrate, an isolation layer, a support layer, a bottom electrode layer, a piezoelectric layer and a top electrode layer that are sequentially arranged from bottom to top, wherein the middle part of the upper surface of the isolation layer is recessed downwards to form a groove, the groove is sealed by the support layer and the substrate to form a sealed cavity, the height of the lower surface of the sealed cavity is less than the height of the upper surface of the substrate, the lower surface of the sealed cavity is a flat surface, and the material of the support layer is SiC. And meanwhile, the invention also discloses a preparation method of the acoustic resonator. According to the cavity type film bulk acoustic resonator and the preparation method thereof disclosed by the invention, the structure of the device is stabilized by the SiC support layer, and the power capacity can be improved; the heat can be effectively dissipated, the thermal steady-state temperature of the device can be reduced, and good thermal stability can be achieved; and according to the method, amorphous silicon layers are removed by using an acetone solution lift-off process, a CMP process can be simplified, the grinding time can be reduced, the grinding uniformity can be improved, and the frequency stability and the rate of finished products of the device can be improved.

A power storage device which has improved performance such as higher discharge capacity and in which deterioration due to peeling or the like of an active material layer is less likely to be caused is provided. In an electrode for the power storage device, phosphorus-doped amorphous silicon is used for the active material layer over a current collector as a material that can be alloyed with lithium, and niobium oxide is deposited over the active material layer as a layer containing niobium. Accordingly, the capacity of the power storage device can be increased and the cycle characteristics and the charge-discharge efficiency can be improved.

The invention discloses a high-linearity broadband stacking low noise amplifier based on a gain compensation technology. The high-linearity broadband stacking low noise amplifier comprises a two-stacking low noise amplification network, an interstage matching network and a two-stacking gain expansion amplification network which are connected in sequence; and a first power supply bias network and a second power supply bias network which are connected with the two-stacking low noise amplification network and the two-stacking gain expansion amplification network. According to the high-linearity broadband stacking low noise amplifier, a serial stacking structure is realized through adoption of two transistors with different sizes and ultra wide band noise and impedance matching are realized through combination of an RLC feedback network; through utilization of the gain compression compensation technology, the gain compression property of the two-stacking low noise amplification network is cancelled within a certain bias range through the two-stacking gain expansion amplification network and a linearity index of the amplifier is improved, so the whole low noise amplifier has good broadband, linearity, low power consumption and low noise amplification capability; and moreover, the low breakdown voltage property of an integrated circuit technology is avoided and the stability and reliability of a circuit are improved.