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58results about How to "Run efficiently" patented technology

Control method and system for permanent magnet synchronous motor based on current prediction

The invention discloses a control method for a permanent magnet synchronous motor based on current prediction and belongs to the field of control over permanent magnet synchronous motors. The method mainly comprises the steps of predicting the improved current and identifying the sensorless rotating speed and a corner based on a phase-locked ring idea combined with the predicting step. According to the control method, the current of a motor stator is predicted ahead of a switch period according to the detected current of the motor stator and a current instruction; corresponding control voltage is predicted; and motor rotating speed and corner position information is identified according to the estimated counter electromotive force of the motor. The invention further provides a control system for realizing the control method. The control system comprises a rotating speed regulator, a current predicting unit, a counter electromotive force estimation unit, a controller and a space vector modulating unit. According to the control method and the control system disclosed by the invention, the permanent magnet synchronous motor can be enabled to still safely operate at high efficiency when the parameters change; and the control method and the control system have a favorable application prospect in the field of control over the permanent magnet synchronous motor.
Owner:HUAZHONG UNIV OF SCI & TECH

Car air conditioning system electronic expansion valve control method

The invention discloses a car air conditioning system electronic expansion valve control method. In a primary stage of start of a compressor, the electronic expansion valve is controlled to reach a constant valve opening corresponding to the rotating speed of the compressor according to timely collected signals of compressor rotating speed to enter a normal operation and control stage by the constant valve opening corresponding to the rotating speed of the compressor and ensure that the valve opening of the electronic expansion valve is transmitted into a control mode of the degree of superheat conveniently. The valve opening of the electronic expansion valve is not influenced by the degree of superheat of the car air conditioning system in the primary stage of start of the compressor. Compared with the prior art, in the primary stage of start of the compressor, the valve opening of the electronic expansion valve is kept at the constant valve opening by the electronic expansion valve control method through the rotating speed of the compressor, the constant valve opening ensures that the valve opening of the electronic expansion valve can be in a relatively stable state and the expansion valve of the primary stage is under a stable operation condition, and therefore influence on the expansion valve resulting from great disturbance is effectively avoided, and normal and high-efficient operation of the system is ensured.
Owner:ZHEJIANG SANHUA AUTOMOTIVE COMPONENTS

Non phase separation type traction power supply equipment for railway locomotive

A non-split-phase type traction power supply device used for rail vehicles belongs to technical field of railway electric traction power supply. The device comprises a traction transformator and an energy distribution regulating machine which mainly consists of a main controller, a driver, an electronic power switch bridgearm, a support capacitance arm, three electric current sensors, three voltage transducers and three reactors, wherein, the driver is connected between a control terminal of the electronic power switch bridgearm and the main controller, the electric current sensors and the voltage transducers are respectively connected between the main controller and A phase, B phase and C phase of an output end of the traction transformator, and the reactors are connected between the center of the bridgearm and the A phase, the B phase and the C phase of an output end of the traction transformator. The invention has the advantages that split-phase power supply is changed into non-split-phase power supply, great run-through of the traction contact network can be realized, and power phase position exchange for power supply again caused by frequent power failure can be avoided, so that safe, high speed and high-efficiency running of train can be guaranteed.
Owner:四川省佳灵电气有限公司

Parameter coupling design method for liquefied air energy storage system

The invention provides a parameter coupling design method for a liquefied air energy storage system. The parameter coupling design method is implemented through at least one processor, a memory in communication connection with the processor and a computer readable storage medium storing computer programs. According to the invention, the maximization of the electricity-electricity conversion efficiency of the system is taken as a design target.Main parameters such as liquefied air energy storage pressure, main compressor/circulating compressor working stages, a main compressor/circulating compressor interstage cooling scheme, a compression heat recycling scheme and cold box high-pressure side outlet air temperature are used as optimization variables; aspen Plus process simulation software is adopted for system thermal simulation, the design process can be effectively simplified, and the design time is greatly shortened. According to the liquefied air energy storage system parameter coupling design method provided by the invention, by comprehensively considering the mutual influence among the unit-unit, the parameter-parameter and the unit-parameter of the liquefied air energy storage system, long-term reliable, stable and efficient operation of the energy storage system under variable working conditions of variable operation parameters, variable external parameters and the likecan be realized.
Owner:NORTH CHINA ELECTRICAL POWER RES INST +3

Hybrid power transmission system, control method and automobile

The invention discloses a hybrid power transmission system, a control method and an automobile, belonging to the field of hybrid power. The system comprises: first spindle, second spindle, an engine sequentially connected to the first spindle, First clutch, a third gear driving gear, a second clutch, a first gear driving gear, a synchronizer, a second gear driving gear and a second electric motor,wherein the first electric motor, the third gear driving gear, the third clutch, the first gear driving gear and the second gear driving gear are sequentially connected with the second main shaft, and the ratio of the number of the first gear driving gear gears to the number of the first gear driving gear gears is a first gear speed ratio; the ratio of the number of gears of the second gear passive gear to the number of gears of the second gear driving gear is the ratio of the second gear speed; the ratio of the number of gears of the third gear passive gear to the number of gears of the third gear driving gear is the speed ratio of the third gear; the second gear passive gear is connected to the wheel. The synchronizer is combined with the driving gear of the first gear or the driving gear of the second gear, so that the automobile has different speed ratios in various modes and has good fuel economy.
Owner:CHERY AUTOMOBILE CO LTD

Pre-drying brown coal power generation system integrated with air heater and pre-drying brown coal power generation method

The invention discloses a pre-drying brown coal power generation system integrated with an air heater and a pre-drying brown coal power generation method. The system comprises a coal-fired power generation system body, a brown coal preheater, a superheated steam fluidized bed drier with an internal heater, an air heater system body and the like. An outlet of the brown coal preheater is connected with an inlet of the superheated steam fluidized bed drier with the internal heater, an outlet of the drier is connected with an inlet of a coal mill, and part of moisture in brown coal is removed in the drier. A heat source inlet of the internal heater is connected with a steam extraction opening of a certain level of a turbine, and an outlet of the internal heater is connected with the hydrophobic side of a corresponding reheating heater. The operation mode of the air heater system changes according to different loads of the air heater. The air heater system can safely and efficiently work in different seasons under different brown coal moisture contents and different dry degrees, waste heat of smoke exhausted from a boiler and waste heat of dried tail gas can be utilized at the same time, and the adverse influence of operation of the air heater on power generation efficiency is eliminated.
Owner:XI AN JIAOTONG UNIV

Unit nozzle for organizing combustion of large flow medium and low calorific value fuel

ActiveCN103104936AEnhanced incision orientationRun efficientlyContinuous combustion chamberEngineeringStreamflow
The invention relates to a fuel nozzle, in particular to a unit nozzle for organizing combustion of large flow medium and low calorific value fuel. The aim of the unit nozzle is that operation of the fuel nozzle can be safe, stable and efficient. A central oil nozzle is arranged in a conic shell and coaxial with the conic shell. A conic shell body air swirler is arranged on an outer wall at an outlet end of the conic shell. An outer surface of the conic shell body air swirler is gradually contracted and the gradually contracted direction of the conic shell body air swirler is identical to that of the conic shell. A leaf crown is fixedly connected on an outer edge of an outlet end of the conic shell body air swirler, the leaf crown is coaxial with the conic shell body air swirler and an end face of the leaf crown is aligned to an end face of the conic shell body air swirler. The outlet end of the conic shell is arranged in a sleeve tube and connected with the sleeve tube through the leaf crown. An inner space of the sleeve tube located on the upper portion of the outlet end of the conic shell is a mixing section of compressed air and medium and low calorific value gas. According to the unit nozzle for organizing the combustion of the large flow medium and low calorific value fuel, a first swirl flow relative to the fuel is matched with a second swirl flow relative to air, so that fuel-air mixture is delivered to the fuel nozzle. The fuel nozzle is safe, stable and efficient in operation.
Owner:HARBIN TURBINE +1

Powerless pile separation device

The invention discloses a powerless pile separation device. The powerless pile separation device comprises a machine body, a pile separation module, a conveying module and a connecting rod module, wherein the machine body is provided with a first slide way and a second slide way arranged at intervals; the first slide way and the second slide way are used for conveying goods containers; the pile separation module is connected with the machine body, is arranged above the first slide way, and is used for separating the goods containers on the first slide way; the conveying module is arranged between the first slide way and the second slide way, and is used for conveying the goods containers to the second slide way after separation by the pile separation module; the connecting rod module is rotationally arranged on the machine body; one end of the connecting rod module is connected with the pile separation module, and the other end of the connecting rod module is connected with the conveying module; the connecting rod module is provided with a handle; and when the handle pulls the connecting rod module to move, the connecting rod module drives the pile separation module to separate thegoods containers on the first slide way, and the connecting rod modules drives the conveying module to convey the goods containers, separated on the first slide way, to the second slide way. The powerless pile separation device is simple and small in structure and convenient for operation and application to a small production line.
Owner:GAC TOYOTA MOTOR

Automobile storage and fetch apparatus for stereo garage

The invention discloses an automobile storage and fetch apparatus for a stereo garage. The apparatus comprises horizontal walking rails, a combined frame moving horizontally along the walking rails, an elevating platform disposed inside the combined frame and moving vertically along a vertical column, a telescoping device fixed to the elevating platform, and an electric control system used for control the action of the combined frame, the elevating platform and the telescoping device. In the prior art, a stacking type stereo garage has a relatively high automation degree, a four-wheel walking mechanism is arranged at the bottom of a carrying device, two operation rails are needed, and the garage has a high technical requirement on the parallelism degree of the two rails. According to the invention, the walking rails support the combined frame to move horizontally in a stereo garage tunnel; the telescoping device reaches a parking platform or a parking space in the garage through a telescoping mechanism of the telescoping device, fetches an automobile and moves the automobile to the elevating platform; and auxiliary devices are not needed in the stereo garage during a whole automobile storage and fetch process; so that the size of the combined frame is decreased, and the storage and fetch apparatus is light in weight and simple in structure, is high in operation efficiency, can independently store and fetch the automobile, and can save the cost.
Owner:YUNNAN KUNMING SHIPBUILDING DESIGN & RESEARCH INSTITUTE

High-speed image transmission system applied to unmanned aerial vehicle system

The invention provides a high-speed image transmission system applied to an unmanned aerial vehicle system. The system comprises an unmanned aerial vehicle signal sending system assembly and a ground signal receiving assembly. The unmanned aerial vehicle signal sending system assembly comprises a high-definition motion camera and a transmitter. The transmitter comprises an H264 coding unit and a transmitting antenna for transmitting a signal. The ground signal receiving assembly comprises a controller, a signal receiving antenna, an H264 decoding unit, a high-definition display screen and a code compiler. Before the H264 decoding unit carries out decoding processing, the code compiler compiles code required for the decoding processing in advance. When the H264 decoding unit carries out the decoding processing, a processing process is carried out by directly employing the compiled code. Some variables in the code can be decoded by the H264 decoding unit. The variables comprise frames, heights, the macro number of images, and parameters such as a quantification factor, and so on. The variables are taken as constants for compiling. A cpu register is no longer occupied. Parameter transmission is unnecessary. The integrated operation of the code is more efficient. An effect of improving the decoding efficiency by 30-50%% is achieved.
Owner:深圳市唯科视科技有限公司

Continuous laminar flow conversion oxygenation and biological enhancement integrated device for black stinking water treatment

The invention discloses a continuous laminar flow conversion oxygenation and biological enhancement integrated device for black stinking water treatment. The device comprises a biochemical reactor, an air pump, a solar power generation system and an artificial biological floating island which are sequentially connected, wherein an aeration device is arranged in the biochemical reactor and is connected with the air pump; the air pump is connected with the solar power generation system; the biochemical reactor is suspended in a water body below the artificial biological floating island; the solar power generation system comprises a solar cell panel; the artificial biological floating island comprises a UPVC frame; a nylon net is laid on the top of the UPVC frame; aquatic plants are planted on the surface of the nylon net; a first base plate and a second base plate are arranged on the nylon net; a waterproof box is fixed on the first base plate; and the solar cell panel is fixed on the second base plate. The device can be used for treatment of urban black stinking water and can achieve the aims of effectively removing pollutants in water, increasing the oxygen content in the water body and inhibiting water eutrophication; meanwhile, the solar power generation system serves as a power supply of the air pump, so that automatic and stable operation of the system is guaranteed, and the investment and operating cost can be saved.
Owner:BEIJING GEOENVIRON ENG & TECH

Detection method for X ray of boiler tube panel

The invention discloses a detection method of the X ray of a boiler tube panel. The detection method comprises the steps of inclining an X-ray machine to the inclining angle position of the X-ray machine when the X-ray machine is aligned to a panel horizontally along the movement direction of a designed inclination axis, and deflecting the X-ray machine by taking the movement direction Y1 as reference, thus determining the vertical orthogonality of ray beam and the panel; descending the panel to the lowest position, sending a steel tube of the tube panel into a protection lead room, pressing an ascending button on the panel, ascending the panel to the highest position, practically measuring, inputting engineering calculation data, panel following engineering calculation data and the diameter (D) of the steel tube of the tube panel of the X-ray machine during the deflection of the X-ray machine; inclining the X-ray machine to the largest inclination angle position, and operating imaging software to complete 0-degree shooting; correcting the direction of the X-ray machine along the deflection movement direction of the axis line, carrying out interpolation motion by the X-ray machine along the backward direction Y1 and the panel along the advancing direction Y2 to reach 0-degree shooting position; rotating the panel along the horizontal rotation movement direction of the panel, thus adjusting the best shooting position; and operating the imaging software to complete 90-degree shooting.
Owner:LANZHOU SANLEI ELECTRONICS

Device used for long-distance large-pipe-diameter pipeline water delivery pipeline tail end and having function of removing water hammer in pipeline

The invention discloses a device used for a long-distance large-pipe-diameter pipeline water delivery pipeline tail end and having a function of removing a water hammer in a pipeline. The device comprises a pond, a pipeline water outlet front end, a pipeline water outlet tail end, a first service valve, a flow adjusting valve, a bypass pipe, a second service valve and a pressure fluctuation pre-check valve. The pipeline water outlet front end is connected with the pond, the first service valve and the flow adjusting valve are sequentially arranged on the pipeline water outlet tail end, the bypass pipe and the pipeline water outlet tail end are arranged in parallel, and the second service valve and the pressure fluctuation pre-check valve are sequentially arranged in the liquid flowing direction on the bypass pipe. Safe, stable and efficient running of water delivery system equipment can be ensured, the major accident of the water delivery and transfer pipeline system can be effectivelyreduced, the phenomenon of water source losing or damage to the surrounding ecological environment due to pipe blasting can be avoided, the water hammer generated by non-normal closing of a brake andother valves in the pipeline can be removed, manual intervention is reduced, and the automation degree is improved.
Owner:YUNNAN DAHONGSHAN PIPELINE
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