151results about How to "Reduce conversion loss" patented technology

A pulse frequency modulation (PFM) controller for controlling a switching mode power supply. The controller includes an output terminal for providing a control signal to turn on and off a current in the power supply to regulate an output of the power supply. A first input terminal receives a feedback signal related to the output of the power supply, the feedback signal exhibiting a ringing waveform when the current in the power supply is turned off. The controller also includes a control circuit configured to provide the control signal in response to the feedback signal. The control signal is adapted to turn on the current in the power supply when the feedback signal is substantially at a valley of the ringing waveform of the feedback signal. In an embodiment, such a PFM controller can reduce turn-on transition loss in a power supply and provides frequency dithering to reduce electromagnetic interference.

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 invention relates to a high-frequency transmission line connection structure, a circuit board having the connection structure, a high-frequency module having the circuit board, and a radar apparatus. A first laminated waveguide sub-line part (21) includes a pair of main conductor layers that oppose each other in a thickness direction with a dielectric layer (31) having the same thickness as a dielectric layer (31) of a microstrip line (1) interposed therebetween. A second laminated waveguide sub-line part (22) includes dielectric layers (31, 32) thicker than the dielectric layer of the first laminated waveguide sub-line part (21). A laminated waveguide main-line part (23) includes dielectric layers (31, 32, 33) thicker than the dielectric layers of the second laminated waveguide sub-line part (22). A conversion part (10) connected to the microstrip line (1) is formed by integrating with an upper main conductor layer constituting the respective line parts.

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).

A control apparatus for a vehicular drive system including a differential mechanism including an electric motor. The drive system includes a switching clutch and switching brake to switch the transmission mechanism between a continuously-variable shifting state and a step-variable shifting state. A shifting control mechanism changes a manner of controlling shifting action of the transmission mechanism during shifting action of an automatic transmission portion, for reducing a shifting shock, depending upon whether a differential portion is placed in the continuously-variable shifting state in which engine speed is variable due to differential function irrespective of rotating speed of power transmitting member, or the non-continuously-variable shifting state in which the engine speed is more difficult to be variable than in the continuously-variable shifting state.

The invention relates to a wind and solar hybrid generation system for a communication base station based on dual direct-current bus control, comprising photovoltaic arrays, a wind-power generator, storage battery sets, unloading devices, an intelligent controller, a charging side direct-current bus, a discharging side direct-current bus, a storage battery set switching circuit, a photovoltaic array switching circuit, an unloading device switching circuit, an overload protecting circuit, a load distributing circuit, an AC / DC converter and a DC / AC inverter. The intelligent controller is sequentially connected to a charging storage battery set and a discharging storage battery set in turn through monitoring the voltage and current change of the dual direct-current buses, switches the photovoltaic arrays and is connected to the unloading devices step by step to control the connection of secondary loads. The invention can effectively enhance the generating capacity of the photovoltaic arrays and the wind-power generator and the utilization ratio of storage batteries, extend the service lift of the storage batteries, supply stable direct-current output, reduce the cost of the system andprovide continuous stable power supply to the communication base station far away from a grid.

The invention provides a single planetary line power dividing hybrid power system. The single planetary line power dividing hybrid power system comprises an engine power input shaft, a one-way clutch,a double-clutch driving disc, a first clutch driven disc, a second clutch driven disc, a first clutch shaft, a second clutch shaft, a power output driving gear, a planet wheel, a planet carrier, a sun gear, a first motor EM1, an internal gear ring, a second motor EM2, a differential mechanism, a main reduction driven gear, a second motor EM2 power output gear, an intermediate gear, a power outputintermediate shaft and a main reduction driving gear. As a double-clutch module is applied to a planetary line power dividing hybrid power configuration, the single planetary line power dividing hybrid power system has the advantages of multiple working modes, high power performance and more energy saving performance. A pure electric mode can be a single motor mode and can also be double-motor mode; and as a parallel mode of an engine and any motor can be adopted at a high speed, efficiency decrease caused by a specific power dividing phenomenon of a planetary line at the high speed is avoided. If any motor has a fault, a vehicle can still normally run so that the redundancy rate of the system is increased.

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.

This invention offers an battery system that reduces a conversion loss due to a charger to reduce power consumption. The battery system has a solar battery, a battery module, a bypass route to bypass a charger to charge the battery module with DC power generated by the solar battery, and a control unit to control so that the electric power generated by the solar battery is supplied to the battery module through the bypass route when an output voltage of the solar battery is equal to or higher than a first predetermined voltage, that is higher than a terminal voltage of the battery module, and equal to or lower than a second predetermined voltage.

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.

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).

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.

A switching controller for a boost power converter includes a switching-control circuit and a programmable feedback circuit. The programmable feedback circuit is coupled to an output of the boost power converter via a voltage divider. The programmable feedback circuit includes a current source coupled to a switch. On a light-load condition, a power-saving signal turns on the switch. The switch will conduct a programming current supplied by the current source toward the voltage divider. Furthermore, the voltage divider is externally adjustable for programming a determined level of an output voltage of the boost power converter on the light-load condition. Additionally the present invention increases system design flexibility to meet practical power-saving requirements without adding circuitries and increasing cost.

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 belongs to the technical field of food-grade sulfuric acid production, in particular relates to a method for cleanly producing food additive sulfuric acid. The method for cleanly producing food additive sulfuric acid comprises the following steps: (1) sulfur melting; (2) sulfur burning; (3) conversion; (4) absorption and drying; (5) waste heat recovery. The method for cleanly producing food additive sulfuric acid aims at reutilizing waste heat and residual pressure during sulfuric acid production, is based on the purpose of further improving the waste heat and residual pressure utilizing efficiency and adopts hot steam to do work to a back-pressure steam turbine to drive an air blower, and the low-pressure steam after doing work is sold externally. Thereby, the electricity used by the air blower is greatly reduced, the steam after doing work is fully utilized, and not only can the energy waste be avoided, but also economic benefits are created.

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 provides a four-drive vehicle hybrid power system. The four-drive vehicle hybrid power system comprises an engine, a first clutch, an engine power input shaft, a driven gear, a driving gear, a first motor, a second clutch, a front main reduction driving gear, a front main reduction driven gear, a front differential, a second motor, a rear main reduction driving gear, a rear main reduction driven gear and a rear differential. The four-drive vehicle hybrid power system is simple in structure, one motor is arranged on a front drive axle, one motor is arranged on a rear drive axle, the structure is not dependent on the traditional automatic gearbox technology, and the structure is easy to design and manufacture; and by arranging the two clutches in a front power coupling box, thenine modes including three pure electric drive modes, three parallel drive modes, engine direct drive, series connection and a parking power generation mode can be achieved, and the system redundancyis increased.

The invention is suitable for the technical field of energy management, and provides a verification system, method and device of energy management strategy and a control system. A load simulation device is mainly used for simulating load operation conditions. The load simulation device can depend on an energy exchange system constructed by power electronic components. Energy exchange is directly carried out according to working condition data, so that direct charging and discharging operation is carried out on an energy system to simulate energy consumption and energy recovery when a load runs, the working condition simulation effect is good, energy conversion loss is reduced, and verification accuracy can be well guaranteed. Deployment is relatively simplified, efficiency is high, and cost is reduced. No running mechanical part exists in the working condition simulation process, the safety is high, and mechanical vibration and noise are eliminated.

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.