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244results about How to "Increase output power" patented technology

Local aluminum back surface field solar battery with two diaphanous faces and preparation method thereof

The invention discloses a local aluminum back surface field solar battery with two diaphanous faces. The aluminum back surface field solar battery comprises a silicon substrate, an emitting electrode, a front antireflection passive film, a front electrode, a back passive film, a back surface field and a back electrode, wherein the emitting electrode, the front antireflection passive film and the front electrode are arranged on the front face of the silicon substrate, and the back passive film, the back surface field and the back electrode are arranged on the back face of the silicon substrate. The back surface field is a local aluminum back surface field, a hole or a groove is formed in the back passive film, the area where the hole or the groove is formed is covered with linear aluminum paste, partial back passive film is reserved not to be covered with the aluminum paste, and the local aluminum back surface field is formed in the area where the hole or the groove is formed after sintering. The local aluminum back surface field is communicated with the back electrode. The back passive layer (film) of the solar battery is not completely covered with the aluminum paste, the battery can absorb part of incident light or scattered light on the back, the current of the battery and the current of components are increased, and therefore the photoelectric conversion efficiency of the battery and that of the components are improved. The invention further discloses a preparation method for the local aluminum back surface field solar battery with the two diaphanous faces.
Owner:JA SOLAR TECH YANGZHOU +1

Tangential and radial resultant magnetic field embedded permanent magnet rotor driving motor

The invention provides a tangential and radial resultant magnetic field embedded permanent magnet rotor driving motor, and belongs to the technical field of automobile motor electric appliances. The tangential and radial resultant magnetic field embedded permanent magnet rotor driving motor is composed of a front end cover, a rear end cover, a shell, a rotor and a stator. Pieces of rectangular permanent magnet steel are embedded into tangential rectangular grooves and radial rectangular grooves of a rotor iron core respectively. Due to the fact that the tangential and radial resultant magnetic field embedded permanent magnet rotor driving motor is of a rotor magnetic bypass structure, the problem that irreversible demagnetization is generated when the permanent magnet steel bears excessively-high temperature or the action of the armature reaction of an impact current can be effectively avoided, it is ensured that demagnetization does not happen on the permanent magnet steel, the magnetic field of the rotor of the driving motor is supplied by both the tangential magnetic field and the radial magnetic field, the magnetic field intensity is large, output power is high, an electro-magnetic winding is not required, power consumption is little, a carbon brush and a mechanical diverter are omitted, the failure rate is low, and the tangential and radial resultant magnetic field embedded permanent magnet rotor driving motor has the advantages of being high in efficiency and power density, compact in structure, reliable in work and the like.
Owner:SHANDONG UNIV OF TECH

Underwater rotary type piezoelectric power generation device

The invention discloses an underwater rotary type piezoelectric power generation device, and belongs to the technical field of new energy sources. The underwater rotary type piezoelectric power generation device is particularly suitable for converting collected kinetic energy generated by flowing of water particles in rivers or oceans into electric power. The underwater rotary type piezoelectric power generation device is composed of a driving component and a vacuum transduction component. In the driving component, an impeller is fixed at one end of a transmission shaft, the transmission shaft is positioned inside a left cavity through a bearing, and the transmission shaft and a driving wheel synchronously rotate. A plurality of left cavity permanent magnets are evenly arranged on the periphery of the driving wheel in an array mode, a left end cover is fixed on the left side of the left cavity, and a sealing ring is fixed on the left end cover through a gland. The vacuum transduction component comprises a first kind of vacuum transduction component and a second kind of vacuum transduction component. The underwater rotary type piezoelectric power generation device together has three structure styles. The underwater rotary type piezoelectric power generation device is used in water and can be effectively prevented from being damaged by extreme storm waves. Meanwhile, the output power of the underwater rotary type piezoelectric power generation device can be increased through the vacuum sealing cavity. The underwater rotary type piezoelectric power generation device is particularly suitable for collecting the kinetic energy generated by the flowing of the water particles in the environments such as the rivers and the oceans.
Owner:DALIAN UNIV OF TECH

DET power supply system of satellite

The embodiment of the invention provides a DET power supply system of a satellite. The DET power supply system is used for improving the output power of a solar cell array of the DET power supply system of the satellite at the initial stage. The power supply system comprises a solar cell array, a power supply control and distribution unit and a storage battery pack. The power supply control and distribution unit comprises an S3R shunt regulator, an MEA and a reference voltage module. The solar cell array is used for converting the obtained solar energy into electric energy; the S3R shunt regulator is used for carrying out shunt control according to the differential signal; the MEA is used for carrying out amplification and integration according to the difference value between the referencevoltage and the bus voltage obtained through control of the S3R shunt regulator to obtain a differential signal and outputting the differential signal to an S3R shunt controller; the reference voltage module is used for generating the reference voltage; the storage battery pack is connected with a bus and used for charging and discharging according to shunt control; the reference voltage module is specifically used for generating different target reference voltages; and the S3R shunt controller is specifically used for carrying out control according to the target differential signal control to obtain different target bus voltages.
Owner:航天行云科技有限公司

Oppositely arranged swing piston type vacuum pump used for automobiles

An oppositely arranged swing piston type vacuum pump used for automobiles comprises a pump body, a power source, an eccentric shaft and a pair of pistons, wherein an external end cover is arranged on each external end surface of the pump body, a cylinder body is formed in the pump body and comprises two internal end surfaces arranged relative to the two external end surfaces, and an internal end cover is arranged on each internal end surface. An exhaust hole and an air inlet pipe connector which are communicated with the cylinder body are also arranged on the surface of the pump body. The eccentric shaft and the pair of pistons are all arranged in the cavity of the cylinder body, the eccentric shaft is driven to rotate by the power source, the pair of pistons are arranged at an angle of 180 degrees in between, each piston comprises a piston head and a connecting rod, a seal ring is arranged on the periphery of the piston head, one end of the connecting rod is connected with the piston head, and the other end of the connecting rod is connected with the eccentric shaft, the piston heads of the pistons are respectively opposite to the internal end covers, and the piston heads and the internal end covers are respectively provided with a check valve. The oppositely arranged swing piston type vacuum pump has the advantages of no noise which can be generated by friction of vanes, high working efficiency and long continuous working period.
Owner:SHANGHAI AUTOMOTIVE BRAKE SYST +1

Ultraviolet LED element and fabricated method of AlGaN base sapphire substrate

ActiveCN101527342AIncrease exit apertureIncrease output powerSemiconductor devicesMicroelectronicsWetting
The invention discloses an ultraviolet LED element and a fabricated method of AlGaN base sapphire substrate, relates to the technical field of microelectronics and mainly solves the problem of low emergent light efficiency. The ultraviolet LED element comprises a low-temperature AlN nucleating layer, a high-temperature AlN nucleating layer, an intrinsic AlGaN epitaxial layer, an n-AlGaN barrier layer, an active zone, a p-AlGaN barrier layer, a low Al component p-type AlGaN layer, a p-type GaN cap layer, and a window zone arranged at the p-type GaN cap layer, which are sequentially arranged from top to bottom. The ultraviolet LED element etches the p-AlGaN cap layer until the p-AlGaN with low Al component by a drying method to form the column emergent light window, and then etches the p-AlGaN cap layer until the p-AlGaN with low Al component by a wetting method so as to change the column emergent light window into a similar hemispheric window, can make the material surface of the window be coarsened while increasing the emergent pore diameter of the window, and greatly improves the power and the efficiency of emergent light. The invention has simple process, good repetitiveness and high reliability, and can be used to occasions of water treatment, medical treatment and biomedicine, and the white light illumination.
Owner:XIAN CETC XIDIAN UNIV RADAR TECH COLLABORATIVE INNOVATION INST CO LTD

Piezoelectric static composite-type low-frequency vibration energy collector

The invention discloses a piezoelectric static composite-type low-frequency vibration energy collector which comprises a mass block, a PVDF film, a flexible variable capacitor and a silicon substrate. The flexible variable capacitor comprises a PDMS flexible cavity, a PDMS carbon nano tube upper electrode and a PDMS carbon nano tube lower electrode, the PDMS carbon nano tube upper electrode and the PDMS carbon nano tube lower electrode are located on the upper surface and the lower surface of the cavity respectively. The PVDF film is arranged on the PDMS carbon nano tube upper electrode of the flexible variable capacitor, and the PDMS carbon nano tube lower electrode of the flexible variable capacitor is fixed to the silicon substrate. The mass block is used for reducing work frequency of a device. According to the energy collector, an MEMS transducer can obtain large output power and high energy conversion efficiency in a low-frequency vibration environment; the energy collector is simple in structure, easy to manufacture, small in size and capable of operating in the low-frequency environment and has high energy conversion efficiency in an environment vibration range.
Owner:SHANGHAI JIAO TONG UNIV

Large power fiber laser with inner cavity frequency doubling

The invention discloses a large power fiber laser with inner cavity frequency doubling, comprising a fiber laser resonant cavity and an inner cavity double-frequency system, wherein the fiber laser resonant cavity comprises at least one pair of cavity mirrors to form the resonant cavity; the resonant cavity is provided with at least one group of high power pump light sources, at least one fiber combiner which couples the pump light into active fiber to form population inversion, at least one signal wavelength selector, and at least one section of large mode field double-cladding polarization-maintaining rare earth doped fiber; the inner cavity double-frequency system comprises at least one frequency doubling crystal, at least one reflector, and at least one dichroic mirror, wherein a laser beam passes through the frequency doubling crystal and is output by the dichroic mirror. According to the inner cavity frequency doubling large power fiber laser, double-cladding large mode field fiber is adopted to increase the output power of near infrared fiber laser; by means of inner cavity frequency doubling, the conversion efficiency of double-frequency is substantially increased; by means of the polarization maintaining fiber, the fiber near infrared laser output polarization direction is made to be consistent with that of the frequency doubling crystal and stable double-frequency output is obtained.
Owner:INNO LASER TECH CORP LTD
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