147results about How to "Reduce conversion loss" patented technology

A control device for a vehicular drive system including (a) a differential mechanism operable to distribute an output of an engine to a first electric motor and a power transmitting member, and (b) a second electric motor disposed between the power transmitting member and a drive wheel of a vehicle, and a differential-state switching device operable to place the differential mechanism selectively in one of a differential state and a locked or non-differential state, the control device including a switching control portion operable to control the differential-state switching device to place the differential mechanism selectively in one of the differential and locked states, and a power-source torque-change restriction control portion operable to restrict a change of an output torque of the engine upon switching of the differential mechanism between the differential and locked states, or a torque-reduction control portion operable to reduce at least one of output torques of an engine and first and second electric motors, upon switching of the differential mechanism from the differential state to the locked state, or to reduce an inertial torque generated due to a speed change of the differential mechanism upon switching of the differential mechanism from the differential state to the locked state.

The present invention provides a small optical waveguide structure capable of converting the spot size of light, and capable of reducing the conversion loss when compared under the condition of the same waveguide length and performing an optical conversion with high efficiency. An optical waveguide structure (100) includes a base waveguide (110) including a taper section (111) whose width becomes continuously narrower from one side toward another side, and a narrow-width section (112) that is consecutively connected to a narrow-width side of the taper section (111) and extends toward the another side. In the optical waveguide structure (100), at least three-layered upper waveguides (121 to 123) each of which has a planar shape smaller than the taper section (111) and includes a planar-view-roughly-wedge-shaped section whose width becomes continuously narrower from the one side toward the another side at least on a tip side are stacked above the taper section (111) of the base waveguide (110) in such a manner that the planar shape becomes successively smaller from the base waveguide side (110).

The invention relates to a direct current microgrid, specifically relates to a power pool-based dual-layer bus direct microgrid and a control method therefor, and solves the problems of high energy conversion loss and low system operating efficiency of the existing single-bus direct current microgrid, and high probability of power interference and poor system operating economy of the existing dual-bus direct current microgrid. The power pool-based dual-layer bus direct microgrid comprises an energy storage voltage regulation system, a direct current sub grid I and a direct current sub grid II, wherein the energy storage voltage regulation system comprises a power pool, a lithium battery pack, a DC/DC converter I, a DC/DC converter II and a DC/DC converter III; the power pool comprises a supercapacitor and a middle bus in parallel; the direct current sub grid I comprises a photovoltaic power generation unit I, a direct current load I and a direct current bus I; the direct current sub grid II comprises a photovoltaic power generation unit II, a direct current load II and a direct current bus II; and the direct current sub grid I and the direct current sub grid II have different voltage levels. The power pool-based dual-layer bus direct microgrid is applicable to a variety of fields.

A photoelectric converter includes a lower electrode layer, a compound semiconductor thin film of a chalcopyrite structure functioning as a photoabsorption layer and a light transmitting electrode layer that are sequentially laminated on a substrate. An end portion of the of compound semiconductor thin film is positioned outward beyond an end of the light transmitting electrode layer.

The invention relates to a hydrogen hybrid electric vehicle, which adopts hydrogen as fuel and belongs to the field of automobiles. The hydrogen hybrid electric vehicle is characterized in that an alcohol pyrolysis hydrogen generator is serially connected onto an exhaust pipeline of a hydrogen engine, alcohol is catalyzed and pyrolyzed to generate hydrogen in the vehicle by the aid of exhaust waste heat (a supplementary heat source for realizing cold state temperature rise and keeping constant temperature of a reaction bed of the alcohol pyrolysis hydrogen generator adopts an electric heating mode), and generated hydrogen is transferred as the fuel of the engine so as to drive the vehicle to run and drive the engine to generate power and supply power for users. An ultra-low emission or zero emission level can be achieved when the hydrogen is combined with the engine to drive the vehicle. Alcohol can be made of various raw materials, including sugarcanes, corns, broomcorn, cassavas and the like which are reproducible resources and are inexhaustible. The alcohol as a raw material for generating the hydrogen can be water-contained methanol or ethanol of 50 degrees to 65 degrees, manufacturing process is simple, and cost is low. In addition, the liquid alcohol is also quite safe and convenient in storage, transport and network supply.

Various embodiments of the invention reduce switching losses associated with existing non-zero volt switching and non-zero current switching in DC/DC converters without the need for a resonant design. Certain embodiments of the invention provide for improved efficiency by reducing switching losses related to the simultaneous presence of current and voltage across high power switching devices. In certain embodiments, this is accomplished by adding a relatively small inductor and two switching elements to various switching regulator topologies. Energy stored in the inductor is used to transition the output of the switching converter to achieve zero volt switching and zero current switching.

A hybrid renewable energy and energy storage system power supply system and a control method thereof integrate an electrochemical energy storage device with a mechanical energy storage device, and then match a solar photovoltaic and wind power generation system, and are grid-connected with a mains supply. In the control concept, an AC-DC is supplied preferentially to an AC-DC load, to reduce the conversion loss. The power supply system allows residence, base stations or computer rooms to be electricity self-sufficient, can conduct electric power trading with electric power companies when being grid connected with the mains supply, can avoid electric transient interruption during power outage and can also ensure a certain degree of power supply.

The invention discloses a production process of poly-crystal rocky candy. The production process comprises the following six steps: by taking first-grade white sugar as a raw material, dissolving the sugar, micro-filtering and clarifying, desalting and decolorizing by using ion exchange resin, concentrating in vacuum, charging seeds for crystallization, drying and packaging to produce the poly-crystal rocky candy. The poly-crystal rocky candy produced by the method disclosed by the invention is sweet and delicious in taste and white and transparent in color and luster; no sodium hydrosulfite is added for color protection during the overall production, so the product is environmental friendly and safe; the crystallization rate of the rocky candy is above 95%; the problem of low crystallization rate during production of the poly-crystal rocky candy for a long time is solved.

A multiple input/output power converter includes: at least two input/output circuits to be connected to electric units; a plurality of power converting circuits including switches and at least an inductor, a plurality of capacitors connected to the power converting circuits; and a control circuit for controlling the switches in a plurality of modes to selectively operate the inductor and the capacitors to operate the power converting circuits in either of stepping up, stepping down, or conducting operation. The capacitors are shared among the power converting circuits.

The invention discloses a method for clarifying cane juice by combining air floatation purification and thermal floatation purification. The method comprises the following steps of: preheating mixed juice to 45-55 DEG C, conveying into a reactor, and adding lime for adjusting the pH value to 5.6-6.6, wherein the adding amount of the lime is 0.02-0.05 percent of the weight of the mixed juice; and charging fine uniform air bubbles by using a bubble maker, adding a flocculating agent, mixing uniformly, adding into a thermal tubular purifier, performing air floatation purification in the thermal tubular purifier to obtain primary clear juice, extracting the primary clear juice into a stirrer, adding a clarifying agent and a flocculating agent simultaneously, and feeding into the thermal tubular purifier through a circulating pump for performing thermal floatation purification to separate secondary clear juice and floating slag out. An air floatation purification technology and a thermal floatation purification technology are combined, so that the clarifying efficiency and effect of the clarifying agent are increased, the quality of a white sugar product is improved simultaneously, and environmental pollution caused by lime sludge is lowered.

The invention discloses a device for generating compressed air by virtue of wind and power complementation, and the device provided by the invention comprises a wind turbine, a transmission shaft, a second accelerating commutator, a first air compressor, a three-way solenoid valve, a second air compressor and an air reservoir, wherein the wind turbine comprises a first accelerating commutator; the output shaft of the first accelerating commutator is connected with the upper end of the transmission shaft by virtue of a coupler; the lower end of the transmission shaft is connected with the input shaft of the second accelerating commutator by a coupler; the output shaft of the second accelerating commutator drives the first air compressor to operate; the air outlet of the first air compressor is connected with the inlet of the three-way solenoid valve; a first air pipe of the three-way solenoid valve is connected with the air inlet of the second air compressor; and a second air pipe is connected with the air reservoir via a third air pipe. The control device controls the two air compressors to respectively or simultaneously operate to achieve a function of wind and power complementation according to the working condition. The device is used for producing compressed air, ensures that the power consumption is reduced, and has the advantages of low investment, high efficiency, low operation and maintenance cost and the like.

The invention relates to the field of desalination of sea water, in particular relating to a high-pressure pump device for driving sea water to be desalinated through complementation of wind and power. The high-pressure pump device comprises a wind machine, a transmission shaft, a gear tumbler, an acceleration gear case, a wind power-driven high-pressure water pump and an electric water pump, andis characterized in that the output shaft of the wind machine is fixedly connected with the upper end of the transmission shaft; the lower end of the transmission shaft is fixedly connected with the input shaft of the gear tumbler; and the output shaft of the gear tumbler is connected with the input shaft of the acceleration gear case through a coupler; and the output shaft of the acceleration gear case is connected with the main shaft of a wind-driven high-pressure pump through a coupler. In the scheme provided by the invention, the wind-driven high-pressure pump is taken as main power, whenthe wind power is not enough or the wind does not exist, the high-pressure pump device can be properly started to ensure facilities to operate. The device is used for desalinating reverse osmosis seawater, and has the advantages of saved investment, high efficiency, low operation and maintenance cost and the like; and by utilizing the device provided by the invention, the power consumption is reduced.

The invention discloses a distributary plate type evaporating cooling air conditioner system driven by photovoltaic direct current. The system comprises a distributary plate type evaporating cooling air conditioner which is connected with a control energy storage cabinet and a photovoltaic cell panel in sequence through lead wires. An inverter is not arranged in a power supply system in the distributary plate type evaporating cooling air conditioner system driven by the photovoltaic direct current, compared with the mode that the inverter is arranged, alternating current is obtained by converting, and then using is carried out, the system has the advantages of being high in power supply efficiency, and investment is saved. Secondly, a distributary plate type indirect evaporating cooling heat exchanger is used, and the advantages of high heat exchanging efficiency and convenience on washing and maintaining are achieved. Finally, an oblique water collecting pool and an added water collecting pit are used, circulating water can be collected quickly and conveniently, and water can be replaced timely and effectively.

The invention discloses a fully-solar-powered data center, which is used for lowering the energy consumption of the data center. According to the technical scheme provided by the invention, the fully-solar-powered data center comprises a server system and a power supply and distribution system, wherein the power supply and distribution system comprises a solar photovoltaic assembly, a diesel generator, commercial power, a centralized UPS (Uninterrupted Power Supply) battery pack and a three-in-one controller; the three-in-one controller comprises a charging and discharging protection controller and a rectifying charging controller; the solar photoelectric assembly is used for supplying power to the server system through the charging and discharging protection controller and charging the centralized UPS battery pack in a centralized way; the input end of the rectifying charging controller is connected with the diesel generator and the commercial power through a transfer switch; and the output end of the rectifying charging controller is used for supplying power to the server system and charging the centralized UPS battery pack. Due to the adoption of the fully-solar-powered data center, the energy consumption of the data center is lowered through a plurality of methods, environment friendliness and energy saving of the data center are realized, the bottleneck limiting the development scale of the data center is eliminated, and further development of the electronic information industry can be facilitated.