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70results about How to "Reduce internal losses" patented technology

Wind power and photovoltaic power complementary power supply system based on mixed energy accumulation of super capacitor accumulator

Disclosed is a wind and solar hybrid power system based on an ultra-capacitor battery hybrid system, which includes a DC / DC buck converter (20), an AC / DC converter (30), an ultra-capacitor assembly (40), a DC / AC converter (50), a battery assembly (60), a battery charge circuit (700), a photovoltaic array (70), a wind generator (80) and an oil engine / commercial power interface (90). The photovoltaic array (70) is connected with the ultra-capacitor assembly (40) through the DC / DC buck converter (20); the wind generator (80) and the oil engine / commercial power interface (90) are connected with the ultra-capacitor assembly (40) through the AC / DC converter (30); the ultra-capacitor assembly (40) charges the battery assembly (60) through the battery charge circuit (700); the ultra-capacitor assembly and the battery assembly provides a definite power buffering to the system so that to maintain a stable voltage of the power supply. The wind and solar hybrid power system of the invention can provides uninterrupted power to the telecommunication system and resident living in the undeveloped areas where the power distribution network can not reach.
Owner:INST OF ELECTRICAL ENG CHINESE ACAD OF SCI

Single-substrate integrated terahertz front end

The invention discloses a single-substrate integrated terahertz front end. The single-substrate integrated terahertz front end comprises a dielectric substrate, an inputting waveguide micro-strip transition and a micro-strip air cavity; the micro-strip air cavity is the air cavity; the inputting wave micro-strip transition (a standard waveguide opening WR-15), a CMRC (compact microstrip resonant cell) structure micro-strip low-pass filter, a parallel double-frequency-doubling diode, a frequency-doubling matching branch knot, a local oscillator band-pass filtering device, a frequency-mixing matching branch knot, a frequency-mixing diode, a radiofrequency waveguide micro-strip transition (a standard waveguide WR-2.2) and an intermediate-frequency low-pass filtering device are sequentially arranged on the single-substrate integrated terahertz front end from left to right. The number of dielectric substrates is reduced; circuits are integrated on the substrate; the number of machined cavities is also reduced; the single-substrate integrated terahertz front end is easy to machine and assemble; designing and machining on the waveguide transition are reduced; and the size of the cavity is also reduced.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Terahertz subharmonic frequency doubling and mixing device based on monolithic integrated circuit

The invention discloses a terahertz subharmonic frequency doubling and mixing device based on a monolithic integrated circuit. The device comprises a fundamental wave input waveguide micro-strip transition, a CMRC structure local oscillator low-pass filter, a frequency doubling matching circuit, a four-die frequency doubling diode, a local oscillator matching circuit, a frequency mixing diode, a radio frequency matching circuit, a radio frequency input waveguide micro-strip transition, and a CMRC structure intermediate frequency low-pass filter. According to the terahertz subharmonic frequency doubling and mixing device based on the monolithic integrated circuit, on the one hand, the number of dielectric substrates is decreased, and circuits are integrated on one substrate, so that the number of cavities to be processed is decreased, and processing and assembling are easy; on the other hand, waveguide transitions to be designed and processed are reduced, and the cavity size is reduced.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Anode-supported solid oxide fuel cell, cell stack and preparation method thereof

The invention relates to an anode-supported solid oxide fuel cell, a cell stack and a preparation method thereof, which belong to the field of fuel cell materials. The anode-supported tubular solid oxide fuel cell comprises an anode support tube with one end sealed, wherein a bar-shaped ceramic connector layer is arranged on the outer side surface of the anode support tube; a compact electrolyte layer is arranged at the part of the outer surface of the anode support tube without the ceramic connector layer, and the compact electrolyte layer and the bar-shaped ceramic connector layer are adjacent to each other and completely cover the outer surface of the anode outer surface; the anode support tube, the compact electrolyte layer and the ceramic connector layer are integrated through cofiring; and a cathode layer is further arranged outside the compact electrolyte layer and disconnected with the ceramic connector layer. The anode-supported solid oxide fuel cell is easy for stacking and has high operating temperature and generating efficiency; a connector is stable and reliable and has a long service life; as the connector and the anode support tube biscuit are prepared through cofiring, convenience and low cost are realized; and meanwhile, the cell structure with one end sealed achieves internal reforming of fuel, compact structure and high power density are also realized.
Owner:SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI

Super capacitor and accumulator hybrid energy-storing series type dynamic voltage restorer

The invention relates to a series dynamic voltage restorer which adopts a super-capacitor and battery hybrid energy storage system, belonging to the technical field of power equipment. The dynamic voltage restorer comprises a charge device which is used for charging the super-capacitor and battery hybrid energy storage system, a hybrid storage energy system consisting of a super-capacitor and a battery and used for storing the power energy in direct current form, an invert unit which is used for outputting compensation voltage and a boosting filter unit which is used for connecting the dynamic voltage restorer to a power system. The dynamic voltage restorer uses one hybrid energy storage module to realize the energy storage requirement of the direct current side of the restorer to replace the traditional energy storage manner, thus satisfying the compensation need of short-time drop of voltage in the power system. At the same time, compared with the dynamic voltage restorer which adopts a traditional energy storage unit, the dynamic voltage restorer has better dynamic response, longer compensation time and higher performance price ratio and is more environment-friendly.
Owner:WUHAN HIGH VOLTAGE RESEARCH INSTITUTE OF STATE GRID

GaN (gallium nitride)-based semiconductor laser and manufacturing method thereof

InactiveCN102227046AReduce leakageIncrease the injection currentLaser detailsSemiconductor lasersIonizationMagnesium
The invention provides a GaN (gallium nitride)-based semiconductor laser and a manufacturing method thereof, belonging to the field of semiconductor lasers. The GaN-based semiconductor laser does not have an electronic barrier layer, thus reducing the working voltage of the laser and prolonging the service life of the laser. For the laser, a quantum cascade radiation layer is arranged between an n-type optical limited layer and an n-type waveguide layer of the laser and utilized to generate infrared radiation when the laser operates, thus realizing ionization of magnesium acceptor impurities in a p-type GaN waveguide layer and a AlGaN optical limited layer, improving carrier concentration in each p-type layer, increasing hole injection current, reducing leakage of electronics from an active area, avoiding introduction of a AlGaN electronic barrier layer and eliminating optical absorption loss caused by the magnesium-doped AlGaN electronic barrier layer, thereby reducing the threshold current of the laser, reducing the working voltage of the laser and prolonging the service life of the laser.
Owner:BEIJING UNIV OF CHEM TECH

Flexible transparent functional device and preparation method thereof

The present invention provides a flexible transparent functional device which comprises an electrode layer, an energy collection and conversion layer and protective layers. The energy collection and conversion layer is on the electrode layer, and ohmic contact is formed by the energy collection and conversion layer and the electrode layer. The protective layers are bonded to the upper and lower sides of the electrode layer. A mica plate is taken as the substrate of the electrode layer. According to the flexible transparent functional device, through using the mica plate as the substrate of the electrode layer, the problem of using the high temperature annealing alloy process to realize the ohmic contact when an inorganic material is used as the energy collection and conversion layer is solved, and the overall flexibility and optical transparency of the functional device are ensured at the same time.
Owner:NORTH CHINA UNIVERSITY OF TECHNOLOGY

High-efficiency vertical cavity surface emitting semiconductor laser with asymmetric optical field distribution

In order to solve the problems of high optical field loss on P-type DBR (distributed Bragg reflector) side and restricted conversion efficiency of the existing vertical cavity surface emitting semiconductor laser, the invention relates to a high-efficiency vertical cavity surface emitting semiconductor laser with asymmetric optical field distribution, which belongs to the technical field of semiconductor laser. The high-efficiency vertical cavity surface emitting semiconductor laser with asymmetric optical field distribution comprises, from bottom to top, an N-side electrode, an N-type substrate, an N-type buffer layer, an N-type segmented DBR, an active region, an oxidation confinement layer, a P-type segmented DBR, a P-type cover layer and a P-side electrode, wherein the refractive index difference of the former 6 to 8 pairs of high- and low-refractive index material of the N-type segmented DBR close to the active region is smaller than that of the latter low-refractive index material pairs; and the refractive index difference of the former 6 to 8 pairs of high- and low-refractive index material of the P-type segmented DBR close to the active region is larger than that of the latter low-refractive index material pairs. The high-efficiency vertical cavity surface emitting semiconductor laser provided by the invention has high photoelectrical conversion efficiency, and wide application prospect.
Owner:SUZHOU EVERBRIGHT PHOTONICS CO LTD

Power consumption measuring and control method for sound system switch power source as well as special device thereof

The invention relates to a power consumption detecting controlling method of sound equipment switch power supply and a relative device, which is characterized in that a power detection controller is arranged in the switch power supply of sound equipment, the power detection controller can detect the real-time output power of the switch power supply, wherein (1) when the output power of the switchpower supply is not same as the nominal power of load, the controller controls the output voltage of the switch power supply stable and automatically adapts the output power for load change, (2), when the output power is higher than load nominal power or is increased, the controller generates an overpower signal to reduce the output voltage of the switch power supply, automatically adjust the output voltage and adapt the output power for the load change, thereby reducing internal power consumption. The invention can reduce internal power consumption of sound equipment at high-power operation,with low consumption, high dynamic response and low cost.
Owner:GUANGDONG REAL DESIGN INTELLIGENT TECH

Input zero-ripple wave converter

ActiveCN104022632AImprove input characteristicsGood value for moneyPower conversion systemsPower factorPush pull
The invention relates to an input zero-ripple wave converter. The input zero-ripple wave converter is characterized in that two same BOOST converters are connected in parallel, or two same SEPICs are connected in parallel, trigger circuits of the two BOOST converters or the two SEPICs are in a push-pull-trigger state, input delta current waveforms of the two converters are differed in a half cycle on time, and thus, the currents supplied by a direct-current power supply are ripple-wave-free constant direct currents; if a supplying power supply is a sinusoidal alternating current power supply, the supplied current is an alternating current in same frequency and phase with the voltage of the alternating current power supply. The input zero-ripple wave converter is mainly applied to a switch power supply and can be applied to centralized electronic ballasts (each can be connected with dozens or hundreds of fluorescent lamps or electronic energy-saving lamps) so as to realize the following effects: the power factor is increased, the efficiency is increased, ripple waves at an input ends are eliminated, the manufacturing cost is lowered, the energy is saved, and the environment is protected; the input zero-ripple wave converter can be further applied to direct current voltage regulation and frequency conversion techniques.
Owner:缪恢宏

Power supply circuit and LCD device using the same

A power supply circuit comprises two AC input ends, a transformer, an output circuit and an output end, the transformer comprises a primary winding and a secondary winding, the output circuit comprises a first inductance, a second inductance, a first diode, a second diode and a filter capacitor, the two AC input ends are respectively connected to the two ends of the primary winding, the one end of the secondary winding is connected in series to the first inductance, then is connected to the output end, the other end is connected in series to the second inductance, then is connected to the output end, the first diode positive pole is connected to one end of the secondary winding, the negtive pole is connected to the ground, the second diode positive pole is connected to the other end of the secondary winding, the negtive pole is connected to the ground, the filter capacitor is connected between the output end and the ground. The power supply circuit has advantage of high electric energy utilance. The invention also provides a LCD device using the power supply circuit.
Owner:INNOCOM TECH SHENZHEN +1

Externally connecting method and connector for dye sensitized nanometer thin-film solar cell

A method for the serial-parallel connection between dye sensitized nano-film solar cells to obtain a large-area solar cell features that various connection methods are used, and a cylinder push method is used to make the heating plate have a proper pressure to heat the large-area electrode of solar cell uniformly.
Owner:INST OF PLASMA PHYSICS CHINESE ACAD OF SCI

Three-phase 24 pulse wave double-Y-shaped output winding phase-shifting rectifier transformer

A three-phase 24 pulse wave double-Y-shaped output winding phase-shifting rectifier transformer comprises primary windings, secondary windings and a core. A connection mode of the primary windings adopts triangle, star, hexagon or extended-hexagon connection, and the primary windings are improved in that rated voltage of the primary windings is high voltage or low voltage. The secondary windings in each phase include a long-edge secondary winding, two middle short-edge secondary windings and two auxiliary short-edge secondary windings, the long-edge secondary windings in all phases are the same in turns, symmetrical and mutually unconnected, the middle short-edge secondary windings in all phases are the same in turns and symmetrical, the auxiliary short-edge secondary windings in all phases are the same in turns and symmetrical, the head end of the long-edge secondary winding in each phase is connected with the head ends of the middle short-edge secondary windings in other two phases, and the tail end of the long-edge secondary winding in each phase is connected with the tail ends of the auxiliary short-edge secondary windings in other two phases, so that three reversely connected double-Y-shaped windings are formed, each secondary winding is wound by metal foil or conductors in an insulating mode, and the rated voltage of each secondary winding is high voltage or low voltage. The primary winding and the secondary windings are in concentric or up-down arrangement on a core limb in each phase, and the core is a three-phase core in the shape of two stacked blocks or a triangle. The three-phase 24 pulse wave double-Y-shaped output winding phase-shifting rectifier transformer is simple in structure and energy-saving.
Owner:尤大千

Photovoltaic power generation system based on MOSFET (metal-oxide-semiconductor field effect transistor) counter-current prevention

The invention discloses a photovoltaic power generation system based on MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) counter-current prevention. The system comprises a storage battery, a control module, at least one photovoltaic cell panel, at least one voltage detection module and at least one MOSFET, wherein only one MOSFET is connected between each photovoltaic cell panel and the storage battery, each voltage detection module is respectively connected with the negative pole of each photovoltaic cell panel, each voltage detection module is also respectively connected with the control module, and the control module is connected with the grid electrodes of the MOSFETs and the voltage detection module. According to the invention, traditional counter-current diodes are replaced with the MOSFETs, because the internal resistance of the MOSFETs in the process of being turned on is small, and greatly lower than the internal resistance of a common diode, thereby greatly reducing the internal loss of energy in the photovoltaic power generation system, and improving the efficiency of the system.
Owner:FUZHOU EAST OF TECH

Preparation process of high-density imbricated module

The invention discloses a preparation process of a high-density imbricated module. The preparation process comprises the following steps of: preparation of a slice without a main grid cell; preparation of a battery string; preparation of a long string of cells; preparation of an imbricated module; primary EL test; laminated packaging; framing and assembling of the junction box; and secondary LE test. The obtained high-density imbricated module improves the utilization rate of the defective pieces and improves the module power through a mode of reducing the battery area and reducing the currentmismatching loss, the battery pieces are sliced to be connected in series by employing conductive paste to remove the distance between the battery pieces so as to greatly save the assembling space, the innovative electrical design without the main grid is employed to reduce the internal loss of the module, effectively improve the output power of the single module and improve the module conversionefficiency, and therefore, the preparation process of the high-density imbricated module has an considerable competitiveness and is expected to occupy the mainstream position in the market.
Owner:JETION SOLAR HLDG

Production process for integrated solar cell with diodes and manufacturing method for photovoltaic assembly

The invention discloses a production process for an integrated solar cell with diodes and a manufacturing method for a photovoltaic assembly. The production process comprises the following steps of: generating completely-isolated diodes on part of the back surface of the cell by virtue of the design concept of integrated circuits, a photoetching technology and an etching process; printing the same paste on the back surfaces of cell slices by virtue of a printing silk screen, and connecting the negative poles of the diodes with the positive pole of the cell (or connecting the positive poles of the diodes with the negative pole of the cell); and forming the integrated solar cell which is characterized in that the front surface is provided with the cell while the back surface is partially provided with the diodes. One end of the cell is connected with the diodes, and the other end of the cell is independent. During a process of producing an assembly by using the cell, the cell is connected with the electrodes of the diodes by virtue of a welding strip welding process, so as to form the photovoltaic assembly without a need to be externally connected with bypass diodes.
Owner:HENGSHUI YINGLI NEW ENERGY

Novel semi-solar cell piece and preparation method and application thereof

The invention discloses a novel semi-solar cell piece which is characterized in that the novel semi-solar cell piece is obtained by segmenting an entire cell piece into two in a direction parallel to the main grid line of the cell piece. According to the invention, the entire cell piece is evenly segmented into two in the direction parallel to the main grid line of the cell piece. The novel semi-solar cell piece herein, like conventional semi-cell pieces that are obtained by performing segmentation in the direction vertical to the main grid line, has the advantage of reducing internal consumption of the cell piece in the process of power generation, and can also prevent short circuit which is often caused in the segmentation technology. Also, according to the invention, in the preparation of a solar cell pack, when the same area of cell pieces are paved, the area of the solar cell pack is approximately the same as that of conventional pack, which is to say that when the area of the pack is approximately the same as the that of conventional pack, the novel semi-solar cell piece can also reach the effects of reducing internal consumption and thus achieves explicit economic benefits.
Owner:江阴艾能赛瑞能源科技有限公司

Vibrating film and vibrating film assembling process

The invention discloses a vibrating film. The vibrating film comprises a vibrating film body; the vibrating film body comprises a medium plane part and a peripheral fixing part; a Dome reinforcing part is arranged on the plane part; a first thermosetting adhesive layer is arranged between the plane part and the Dome reinforcing part; the plane part and the Dome reinforced part are integrally adhered by thermal curing through the first thermosetting adhesive. The invention further discloses an assembling process of the vibrating film. The vibrating film is high in adhering force of parts and good in high frequency features.
Owner:GOERTEK INC

Method for improving transmission performance of flow battery and flow battery

The invention discloses a method for improving the transmission performance of a flow battery and a flow battery. According to the method, a deep eutectic solvent electrolyte flow battery is arranged in an ultrasonic generator, so that the ion movement rate of charged ions in electrolyte is improved under the cavitation action of ultrasonic waves, and the conductivity of the flow battery is improved. The flow battery comprises a positive electrode liquid storage tank, a negative electrode liquid storage tank, a first mechanical pump, a second mechanical pump, an ultrasonic generator, an ion exchange membrane, a negative electrode, a positive electrode, a first collector plate, a second collector plate, a first end plate and a second end plate. According to the invention, the chemical and physical characteristics of the deep-eutectic solvent electrolyte are adjusted by adding ultrasonic waves, the diffusion coefficient of ions in the flow battery electrolyte is increased, the problem of low battery power density caused by high viscosity of the existing deep-eutectic solvent electrolyte is effectively solved, and the energy efficiency and power density of the battery are further improved.
Owner:JIANGSU UNIV

Electroacoustic converter

An electroacoustic converter (1) is disclosed for converting electrical energy into mechanical vibrations at a predetermined frequency. The converter (1) is supplied with alternating electrical power from the power supply. The converter has metal front and rear driver masses (3, 5), front and back ceramic stacks (7, 9), a spacer (11) between the front and back ceramic stacks, and a fastener extending axially of the converter coupling the front and back driver masses to clamp the ceramic stacks and the spacer between the front and back drivers. The front and back ceramic stacks are of piezoelectric ceramic material such that when energized with an alternating electrical power from the power supply the piezoelectric material renders the converter resonant at the predetermined frequency. The spacer, and front and back driver masses are provided with fins to radiate heat from the converter. The converter exhibits substantially even temperatures and a vibrational node within the spacer.
Owner:BRANSON ULTRASONIC CORP

Assembly whose inner circuit is optimized

The invention discloses an assembly whose inner circuit is optimized, which, from top to bottom, sequentially comprises packaging glass, EVA, cells, EVA and a back plate, wherein the cells are serially connected via welding ribbons; each welding ribbon is sequentially connected onto the front surface of one cell and the back surface of the next cell; and from the welding ribbon starting point to the front-surface welding ribbon ending point on each cell, the welding ribbon becomes wider or thicker gradually. The inner circuit is optimized, the current bearing ability of the assembly is improved, the inner loss of the assembly is reduced, a narrow welding ribbon part exists, the shading area of the assembly is reduced, and power output of the assembly is improved from the electrical aspect and from the optical aspect.
Owner:SHANDONG YONGTAI CHEM GROUP

Super capacitor and accumulator hybrid energy-storing series type dynamic voltage restorer

The invention relates to a series dynamic voltage restorer which adopts a super-capacitor and battery hybrid energy storage system, belonging to the technical field of power equipment. The dynamic voltage restorer comprises a charge device which is used for charging the super-capacitor and battery hybrid energy storage system, a hybrid storage energy system consisting of a super-capacitor and a battery and used for storing the power energy in direct current form, an invert unit which is used for outputting compensation voltage and a boosting filter unit which is used for connecting the dynamic voltage restorer to a power system. The dynamic voltage restorer uses one hybrid energy storage module to realize the energy storage requirement of the direct current side of the restorer to replacethe traditional energy storage manner, thus satisfying the compensation need of short-time drop of voltage in the power system. At the same time, compared with the dynamic voltage restorer which adopts a traditional energy storage unit, the dynamic voltage restorer has better dynamic response, longer compensation time and higher performance price ratio and is more environment-friendly.
Owner:WUHAN HIGH VOLTAGE RESEARCH INSTITUTE OF STATE GRID

Capacitor and series reactor synchronous capacitance and reactance modulation switch

ActiveCN1674396AFill in the technical gaps that cannot adjust capacity and reactanceGood continuous capacity adjustment and resistance adjustment performanceReactive power adjustment/elimination/compensationReactive power compensationCapacitanceElectric power system
The present invention relates to a capacitor and series-connected reactor synchronous capacitance-regulating reactance-regulating switch. It is composed of insulating cylinder, moving contacts, static contacts, rotating shaft and electric mechanism. Said invention also provides their connection mode and concrete arrangement structure. Said invention has good continuous capacitance-regulating and reactance-regulating property, can be extensively used in 10KV reactive-load compensation equipment of transforming station, and can raise the accuracy of reactive-load compensation equipment of transforming station.
Owner:JINZHOU ELECTRIC POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY

Automatic control electric spark source device applied in field of engineering survey and detection

The invention discloses an automatic control electric spark source device applied in the field of engineering survey and detection. The automatic control electric spark source device comprises a relay, wherein one end of the output end of the relay is connected with the live wire of an AC 220V power supply, the other end of the output end of the relay is connected with one end of the input end ofan AC transformer; the control end of the relay is connected to a controller through a circuit; the neutral line of the AC 220V power supply is connected to the other end of the input end of the AC transformer; the output end of the AC transformer is connected to the input end of a voltage doubling device; the output end of the voltage doubling device is directly connected to the input end of a high-voltage energy storage capacitor; and the controller controls the on-off state of the relay so as to realize a charging control function of the high-voltage energy storage capacitor. The automaticcontrol electric spark source device can automatically control charging and discharging, can greatly improve the field exploration efficiency, and reduce the labor cost. A synchronous trigger signal can trigger equipment such as a sonic instrument, a seismograph, a TSP instrument and the like, can be used in conjunction with the sonic instrument, the seismograph, the TSP and the like, avoids the idleness of the equipment and enhances the usage rate of the equipment.
Owner:CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD

Constant-current output circuit for improving power factor correction efficiency and power supply

The invention relates to a constant-current output circuit for improving power factor correction efficiency and a power supply. The constant-current output circuit comprises a rectification circuit, aPFC circuit, a half-bridge resonant circuit and a detection control circuit, wherein the rectification circuit is connected with a mains supply and is used for receiving an alternating current and rectifying the alternating current to a DC voltage, the PFC circuit is connected with the rectification circuit and is used for receiving and correcting the DC voltage and outputting a PFC voltage, thehalf-bridge resonant circuit is connected with the PFC circuit and is used for receiving the PFC voltage and outputting an output voltage according to the PFC circuit, the detection control circuit isconnected with an input end of the rectification circuit and a control end of the PFC circuit, the detection control circuit is used for outputting a voltage adjustment signal to the control end of the PFC circuit when the mains supply is lower than a preset value, and the PFC circuit is used for receiving the voltage adjusting signal and reducing an output voltage of the PFC circuit according tothe voltage adjustment signal. The output voltage of the PFC circuit can be rapidly reduced when the input voltage of the mains supply is lower than the preset value, the internal loss of the PFC circuit is reduced, and the efficiency of the PFC circuit is improved.
Owner:SHENZHEN SOSEN ELECTRONICS CO LTD
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