41results about How to "Reduce output efficiency" patented technology

In the Group III nitride-based compound semiconductor light-emitting device of the invention, an non-light-emitting area is formed in a light-emitting layer. In a light-emitting diode where light is extracted on the side of an n-layer, an outer wiring trace portion and an inner wiring trace portion of an n-contact electrode impedes light emission from the light-emitting layer. Therefore, there are provided, at the interface between a p-layer and a p-contact electrode, high-resistance faces having a width wider than the orthogonal projections of contact areas between the outer and inner wiring trace portions and the n-layer on the interface between the p-contact electrode and the p-layer. Through this configuration, current flow is limited, and portions having a total area equivalent to that of the high-resistance faces of the light-emitting layer serve as non-light-emitting areas. Thus, current can be supplied preferentially to an area of the light-emitting area where the outer wiring trace portion and the inner wiring trace portion are difficult to shade light, whereby light extraction efficiency with respect to supplied current can be enhanced.

The invention discloses a high-frequency inverter power supply of a wireless power transmission device and a frequency doubling control method for the inverter power supply. An inverter frequency doubling circuit (2) consists of n sets of parallel inverter units (2'); a main controller (8) determines output power and output frequency according to the working conditions of a noncontact transformer (4) and a load (7), adjusts duty ratios of pulses and phases between the pulses and sends driving pulse signals; the n sets of inverter units (2') of the inverter frequency doubling circuit (2) are driven to act by a driving circuit (13) in a time division mode, so that the output voltage frequency or the current frequency of the inverter frequency doubling circuit (2) is n times those of the inverter units (2'), and adjustment of a 1 to n-times output frequency range is realized; and a primary resonant capacitor (5) and a secondary resonant capacitor (5') can be adjusted according to the output frequency of the inverter frequency doubling circuit (2) to keep efficient transmission, wherein n is an integer not less than 1.

The invention discloses a wide-input-voltage power supply converter, which has the advantages of ultra-wide voltage input range, high product reliability and high response speed. The wide-input-voltage power supply converter comprises a BOOST circuit (1), a DC (Direct-Current)/DC converter circuit (2), a BOOST control circuit (6), an IC (Integrated Circuit) power supply circuit (5) for supplying power to the BOOST control circuit (6), a voltage detecting circuit (3) with a power supply switching-off reference voltage, and a power supply switching-off circuit (4) for executing an operation of switching off the power supply circuit (5), wherein the voltage detecting circuit (3) is used for detecting a direct-current input voltage and outputs a logic level by comparing a detecting result with the power supply switching-off reference voltage, so that the power supply switching-off circuit (4) is driven to switch the power supply circuit (5) off or do not act.

The invention discloses a high-frequency dedusting transformer which comprises a low voltage winding, a high voltage winding and an iron core; the iron core takes a 'Square' shape which consists of two half-'Square' shapes in butt joint, and the iron core is made from ferrite material; the output voltage of the low voltage winding is 0.68kV, the output voltage of the high voltage winding is 66kV, and the working frequency of the transformer is 7-8kHz. The low voltage winding is wound by copper foil, the high voltage winding is of multi-pancake continuous type, and insulation and cooling are realized by transformer oil. Compared with the prior art, the high-frequency dedusting transformer has the advantages that the operation is stable, the dedusting efficiency is increased by about 20% relative to that of a power frequency transformer, the volume of the transformer is decreased by about 10%, which facilitates the installation of the whole set of equipment, and the high-frequency dedusting transformer is applicable to environment-friendly dedusting equipment.

In an FC system of an FC vehicle, if a control device determines that conditions of an idling power generation suppression mode of a FC are satisfied, the control device sets the voltage of the FC to a predetermined voltage value outside a voltage range where an oxidation-reduction of platinum proceeds, and controls a reactant gas supply apparatus to change a supply amount of air such that the FC has an output in accordance with the electric power required by a load.

An electric power distribution system includes a first path through which electric power is supplied from a DC/DC converter to a driven load to be driven in a load group; a second path connected in parallel with the first path and through which electric power is supplied from the battery to the driven load; a third path connected in series with the second path and connecting the DC/DC converter and the battery; a first switching circuit provided in the third path and switched to either ON state or OFF state; and a control unit switching the first switching circuit to either the ON state or the OFF state based on travel route information of a navigation system. The control unit switches the first switching circuit to the ON state according to a peak current of a load current of the driven load derived from the travel route information.

A phosphor device of an illumination system emitting a first color light in a first waveband region includes a first region having n sub-regions and n single-powder phosphor agents, wherein n is ≧2. The n single-powder phosphor agents are coated on the n sub-regions, respectively, for transforming the first color light in the first waveband region into n color lights in n waveband regions. The n sub-regions are arranged in a specific area ratio. The first color light in the first waveband region is cyclically transformed into a second color light in a second waveband region, a third color light in a third waveband region, . . . , and a (n+1)^th color light in a (n+1)^th waveband region in a specific time ratio according to the specific area ratio, such that the n color lights sequentially outputted in the specific time ratio are integrated as a specific color light.

The invention relates to a direct cooling system applied to a rotor and a winding of a high-speed permanent magnet motor. Cooling liquid enters from a hollow cavity of a rotating shaft, passes through a rotating shaft guide hole under the rotating centrifugal effect of the rotor and flows into an area formed by the end face of the end plate and a rotor core; the area formed by the end face and the rotor core is communicated with a rotor de-weight hole and an end plate guide hole; one part of the cooling liquid is thrown out from the end plate guide hole and is in contact with the inner end face of the winding for heat exchange, and winding cooling is completed; and the other part of the cooling liquid passes through the rotor de-weight hole communicated with the rotor core, so that the cross flow in the axial direction is completed, and the rotor iron core is cooled. According to the invention, the hollow shaft, the end plates, the rotor core, the permanent magnet magnetic isolation bridges and other structures are fully utilized to set the cooling flow channels, so that the influence of the cooling flow channels on electromagnetic performance is reduced; through a rotor encapsulation process, the change of a cooling flow channel structure is realized, and the flow demand and the temperature rise demand are balanced. and the rotation inertia is reduced, the oil stirring loss is reduced, and the motor performance output and the system efficiency are improved.

The invention discloses an early-maturing efficient planting method for intercropping of greenhouse broad beans and garlic and belongs to the technical field of crop planting. The method comprises the following steps of: intercropping greenhouse broad beans and garlic, ridging and transplanting vernalized broad bean seedlings from the bottom of July to the beginning of October, and sowing garlic in the corresponding period; harvesting the broad bean green pods from the beginning of December to the Spring Festival, harvesting garlic sprouts from the first ten-day period of October to the Spring Festival, and retaining garlic without harvesting the garlic sprouts to the coming year to harvest young garlic shoots and the heads of garlic, wherein 1000-1250kg of garlic sprouts are produced per mu, so that 3000-4500 yuan can be increased per mu; about 1500-2000kg of broad bean green pots are produced per mu, so that the output value per mu of broad beans is about 10000 yuan. The planting method is incomplex in technology and stable in benefit, and the economical benefit is favorably increased and the income of farmers is favorably increased; the utilization efficiency and yield efficiency of land are favorably increased; sterilization and insect dispelling are facilitated, so that plant diseases and insect pests are prevented or reduced, and the cost is lowered and the effect is increased; by reducing nitrogen competition of soil, input of a nitrogen fertilizer is reduced, so that the cost is lowered.

The invention belongs to the technical field of nanogenerators, and relates to a Spiro-MeOTAD/ZnO piezoelectric type nanogenerator and a preparation method thereof. The structure of the nanogeneratorcomprises a zinc oxide nanowire array, a zinc oxide seed layer, Spiro-MeOTAD organic coating layers, a conductive substrate, an upper electrode, lead wires and an encapsulation layer, wherein the conductive substrate serves as a lower electrode of the generator, the zinc oxide nanowire array is grown on the conductive substrate covered with the zinc oxide seed layer, and the Spiro-MeOTAD organic coating layers cover the surfaces of zinc oxide nanowires to form PN junction structures; and the upper electrode is arranged above the nanowire array, the upper electrode and the conductive substrateare led out by means of the two lead wires as output ends of current and voltage, and finally the whole device is wrapped with the encapsulation layer. The PN junction piezoelectric type nanogenerators disclosed by the invention has the advantages of simple and compact structure and simple preparation process, and adopts a special mode to greatly improve the output performance.

The invention discloses a toxin-free seedling production method suitable for fast propagation of submerged plants. The toxin-free seedling production method suitable for fast propagation of the submerged plants comprises the following steps: eliminating apical dominance; cutting explants; disinfecting the explants; activating lateral meristems; inducing complete seedlings; strengthening the seedlings; and packaging engineering seedlings. The toxin-free seedling production method suitable for fast propagation of the submerged plants is suitable for multiple kinds of submerged plants, with stemswith joints, bud segments and rhizomes of the submerged plants applied as the explants, through non-callus culture and fast propagation, the production cost is reduced, a culture medium formula is adjusted for different species, high-quality toxin-free seedlings of the multiple kinds of submerged plants are subjected to scale production, the requirements of diversity of species in an aquatic ecological environment are met, and the high-quality toxin-free seedlings of the multiple kinds of submerged plants have effects in the aspects of ecological environment construction, comprehensive treatment of water environments and wetland rejuvenation engineering.

An electrical power control system includes a first fuel cell system and a second fuel cell system, and a waste electricity unit connected in series with a switch unit. The waste electricity unit and the switch unit are connected in parallel with each of the fuel cell systems. At a time when at least one power supply system is started, a control unit selectively executes a charging control and a waste electricity control, based on at least one of temperature information and electrical storage information. The charging control suppresses a rise in voltage by supplying the electrical power of the power supply system to the power storage device. The waste electricity control suppresses a rise in voltage by supplying the electrical power of the power supply system to the waste electricity unit.

The invention discloses a permanent magnet motor rotor and a motor. The permanent magnet motor rotor comprises a rotor assembly, 2n (n=1, 2, 3...) built-in rectangular grooves are formed in the rotor assembly along the circumferential surface, the rectangular grooves are linear, magnetic isolation edges are arranged at the two ends of the outer sides of the rectangular grooves, magnetic isolation bridges are arranged at the positions of central symmetry lines of the rectangular grooves, and the number of the magnetic isolation bridges can be set to be zero when the linear speed Vtip of the motor rotor is low, otherwise, the number can be set to be one. According to the linear speed (mechanical centrifugal force of the outer surface of the rotor) of the rotor, the width of the magnetic isolation edges and the number and width of the magnetic isolation bridges are reasonably designed, so that the rotor assembly and the permanent magnets do not move left and right in the rectangular grooves, and the mechanical strength under the centrifugal force is guaranteed; therefore, the magnetic field effect and the output electrical performance of the motor are satisfied, the vibration resistance of the motor rotor is improved, and the rotating speed range of the motor is effectively expanded.

The present invention provides a rotating electric machine unit capable of suppressing a decrease in output efficiency of a rotating electric machine without decreasing the cooling efficiency of the rotating electric machine. The rotating electric machine unit includes: a rotating electric machine; a rotor shaft in which a cooling medium flow path is provided; and a cooling medium supply device that supplies a cooling medium to the cooling medium flow path. The cooling medium passing through the cooling medium flow path is supplied to the rotor and the stator of the rotating electric machine to cool the rotating electric machine. The cooling medium supply device is provided with: a switching unit that switches between an axial cooling implementation state in which the cooling medium is supplied to the cooling medium flow path and an axial cooling stop state in which the cooling medium is not supplied to the cooling medium flow path; and a control unit that controls the switching unit. When the cooling medium temperature calculated by the cooling medium temperature calculation unit is a temperature within a predetermined cooling medium temperature range, the control unit controls the switching unit so that the axial cooling is stopped.

The invention provides a valve operating device. By adopting the valve operating device, assigned torque at an input side is reduced, the characteristics of a normal-inverse rotation prevention function can be played, an output torque can be high efficiently acquired at an output side, more assigned torque on the operation can be loaded, and a compact structure can be achieved. In order to open and close a valve by rotating a valve rod of the valve which is arranged on a pipeline and the like, the valve operating device comprises a worm gear mechanism, a whirlwind-type reducer and a valve rod embedded shaft, wherein the worm gear mechanism is provided with a mechanism for inputting the rotation, a rotating shaft which rotates through the mechanism and is provided with a worm gear and a worm wheel which is engaged onto the worm gear; the whirlwind-type reducer is used for implementing the rotation input and reduction output of an input shaft for supporting the worm gear; and the valve rod embedded shaft is used for transferring the rotation output from the whirlwind-type reducer to the valve rod of the valve, so that the normal-inverse rotation prevention function achieved through the engagement between the rotating shaft and the worm wheel can be acquired, the output torque can be high efficiently acquired through the whirlwind-type reducer, and the compact structure can be realized through the combination of the worm gear mechanism and the whirlwind-type reducer.

The invention discloses a display device used for industrial design products and an assembling method of the display device. The display device comprises a base and a supporting column fixed to the base, a display platform is rotatably connected to the top of the supporting column and driven by a driving motor installed in the supporting column to rotate, a cavity which is distributed in the axisinside the supporting column, the driving motor is fixedly installed on the base, an output shaft of the driving motor is connected with the display platform through a drive part, a circle of lateralwall is arranged on the outer circle of the bottom of the display platform, the drive part is in drive connection with the inner wall of the lateral wall and the center of the bottom of the display platform, and the lateral wall of the bottom of the display platform and the top face of the supporting column are rotatably connected together. On the premise that the installing position of the motoris not changed, the display device is reliable and stable during rotation, it is guaranteed that the display platform rotates constantly, the display platform is prevented from stopping rotating, andaccordingly the models can be effectively displayed in all directions.