130results about How to "Acceleration time shortened" patented technology

A drive system of a permanent magnet motor is constituted of a mode switching trigger generator which monitors a state of a permanent magnet motor and issues a mode switching trigger, a conduction mode determining unit which receives the mode switching trigger and switches the mode of the permanent magnet motor, and a PWM generator which outputs a PWM signal to an inverter in accordance with the output of the conduction mode determining unit. The mode switching trigger is generated on condition that the speed electromotive force of the permanent magnet motor exceeds a constant or variable threshold value.

The invention discloses an acceleration and deceleration controlling method based on an S-shaped curve. An S-shaped curve is applied to speed planning of an i+1 section of a processing track, wherein the i+1 section of the processing track is arranged between a first transfer position and a second transfer position, and accelerations of the first transfer position and the second transfer position are controlled not to be zero. The invention further discloses a controlling device of acceleration and deceleration based on the S-shaped curve and the numerically-controlled machine tool. Due to the fact that the acceleration and deceleration method based on the S-shaped curve and the equipment using the acceleration and deceleration controlling method based on the S-shaped curve of a numerically-controlled system control the accelerations of the first transfer position and the second transfer position not to be zero, processing efficiency can be effectively improved, and impact to the machine tool during the processing process is reduced.

The present invention relates to a launch control unit for selectively engaging a revised shift control strategy. The revised shift control strategy is operable to control an internal combustion engine and/or an automatic transmission of a motor vehicle. The launch control unit can be configured to receive a brake signal from a foot brake and a torque demand from a throttle pedal. In use, the launch control unit is operable to engage said revised shift control strategy upon receipt of a torque demand greater than or equal to an upper torque threshold within a predefined time period of receipt of a brake signal less than or equal to a lower brake threshold.

The invention discloses an energy recycling system and method for a liquid hydrogen fuel cell car. The system comprises a superconducting coil, a superconducting switch, a full-bridge type direct current chopper, a superconducting current lead, a direct current link capacitor, a DC-AC bilateral transducer, a vehicle-mounted motor and a measurement and control system, wherein the superconducting coil is immersed in a liquid hydrogen container, the superconducting switch and the full-bridge type direct current chopper are installed in a low-temperature Duval, and the superconducting current lead, the direct current link capacitor, the DC-AC bilateral transducer, the vehicle-mounted motor and the measurement and control system are arranged in a low-temperature hydrogen pipeline. The superconducting current lead is used for connecting the superconducting coil, the superconducting switch and the full-bridge type direct current chopper. The low-temperature hydrogen pipeline is used for connecting a liquid hydrogen fuel cell, the liquid hydrogen container and the low-temperature Duval. Compared with the prior art, the energy recycling system has the advantages that the superconducting coil is cooled directly through vehicle-mounted liquid hydrogen, the superconducting current lead, the superconducting switch and the full-bridge type direct current chopper are cooled directly through the low-temperature hydrogen produced through gasification of the vehicle-mounted liquid hydrogen, a supermumetal energy storing device is actually used in the liquid hydrogen fuel cell car, the brake energy recycling and reutilizing ratio of the car is improved, and staring time and accelerating time of the car are shortened.

This invention discloses a method for synchronizing search of local areas based on time domain process, which applies a phase difference of two TDM CPICH to identify a harass code set in a data frame sent at the transmitting end and extra masks are not needed, so it will not increase interference to other local areas and reduces complexity of related test operation to frequency domain of OFDM signals.

The invention discloses a control system and a control method for mining the acceleration potential of an aero-engine. The control system comprises the aero-engine, an optimization controller, a full authority digital electronic controller and an engine non-linearity real-time mathematical model, wherein a sensor used for testing the rotating speed, temperature and pressure of the engine is installed on the aero-engine, and the full authority digital electronic controller controls the aero-engine through an electromagnetic valve component. On the basis of avoiding model error brought by linearization treatment of an engine model, compared with the existing control algorithm at present, the control method disclosed by the invention has the advantages that after a designed optimizing control algorithm introduces security constraints on the basis of ensuring the optimizing control effect, so that the working security of the engine in the acceleration process can be greatly improved; compared with the traditional control method, the control method disclosed by the invention can be used for avoiding the linearization error of the engine model, and greatly improving the confidence coefficient of the system optimization effect.

The invention discloses a swing type cable hoisting frame for electricians. The swing type cable hoisting frame comprises a base. A support is fixedly arranged on the base. A screw rod is rotatably mounted on the left side of the support. A second bevel gear is fixedly arranged at the lower end of the screw rod. A rotary shaft is rotatably mounted on the lower side of the support. A first bevel gear is fixedly arranged at the left end of the rotary shaft. The first bevel gear is engaged with the second bevel gear. A thread sleeve is in threaded connection with the screw rod. The right side ofthe thread sleeve is slidably connected with the support. A push rod is rotatably mounted on the left side of the screw rod. A swing fulcrum bar is rotatably mounted at the upper end of the support. The lower side of the swing fulcrum bar is rotatably connected with the other end of the push rod. A hoisting frame body is fixedly arranged at the left end of the swing fulcrum bar. The inner side ofthe lifting frame body is symmetrically and fixedly provided with two electric push rods. The telescopic ends of the electric push rods are fixedly provided with limiting disks. The swing type cable hoisting frame for the electricians is simple in structure, convenient to operate, high in hoisting speed, capable of saving cable drum hoisting time and suitable for hoisting of small and medium-sizedcable reels.

The invention discloses a torque output method and device for an electric automobile and the electric automobile. The torque output method of the electric automobile comprises the steps that when an electric automobile powering-on signal is detected and the electric automobile is in a stop state, the gear state, the state of a parking brake, the state of a brake pedal and the state of an accelerator pedal are detected; when the gear state is a forward gear state, the parking brake is in a released state, the brake pedal is in a trod state and an accelerator pedal signal is a released signal, a constant-value torque output command is generated; and the constant-value torque output command is sent to a driving motor, and the driving motor outputs the constant-value torque based on the constant-value torque output command. By the adoption of the torque output method and device for the electric automobile and the electric automobile, the response time of the driving motor can be shortened, the acceleration time is shortened, and the acceleration performance of the whole automobile is improved.

The invention relates to a solid-liquid phase composite internal combustion engine oil. According to the theory of solid-liquid phase composite lubrication technology, and aimed at the requirements of the performance, characteristics, working conditions and the like of an internal combustion engine on a lubrication system, the invention provides a technical scheme for the solid-liquid phase composite internal combustion engine oil composition and a preparation method thereof. The components of the oil include solid lubricant material, liquid medium and other auxiliary materials-dispersing agent, oxidation and corrosion inhibitor, detergent additive, internal combustion engine oil complexing agent, defoaming agent and stabilizing and dispersing agent, which are processed into the solid-liquid phase composite internal combustion engine oil with a stable dispersion system by high-speed shearing emulsification, ultrasonic oscillation and sanding dispersion.

The invention relates to a vehicle control method and device, a storage medium and a vehicle. The pressure of a brake master cylinder and the opening degree of an accelerator pedal are obtained; when the pressure of the brake master cylinder is greater than a first preset pressure threshold value, the opening degree of the accelerator pedal is not less than a first preset opening degree threshold value, and the moment when the pressure of the brake master cylinder is greater than the first preset pressure threshold value is earlier than the moment when the opening degree of the accelerator pedal is not less than the first preset opening degree threshold value; the vehicle is controlled to enter an activated state of an ejection starting function; and an engine of the vehicle is controlled to output the target torque under the condition that the vehicle is in the activated state. Thus, a driver can simultaneously operate a brake pedal and an accelerator pedal to enable the vehicle to enter an activated state of an ejection starting function before starting, that is, torque output can be provided according to the state of the accelerator pedal when the vehicle is in a brake state, so that the vehicle can be quickly started with large power, the acceleration time is reduced, and catapult starting is achieved.

The invention discloses a catalyst for chemical enhancement of an ultrathin optical glass panel, and applications of the catalyst. The catalyst is prepared by mixing the following raw materials in percentage by weight: 25-50% of potassium carbonate, 5-25% of potassium chloride, 2-15% of sodium chloride, 3-25% aluminium oxide, and 2-15% of diatomaceous earth. The applications of the catalyst comprise the steps of production and enhancement of fused salt. The catalyst can accelerate the ion exchange between Na<+> in glass and K<+> in fused salt, so as to offset microcracks, and can obviously shorten the time for chemical enhancement on the basis of not reducing the properties of the ultrathin optical glass panel.

A sheet feeding device includes a sheet storage unit, a driving unit, a first detection unit, a second detection unit, and a control unit. The sheet storage unit includes a tray on which a sheet bundle including a plurality of sheets is to be stacked. The driving unit lifts up the tray. The first detection unit detects, at a predetermined position, a top surface of the sheet bundle stacked on the tray and lifted up. The second detection unit detects whether a sheet is stacked on the tray. The control unit controls, while the first detection unit has not detected the top surface of the sheet bundle, the driving unit to lift up the tray at a first speed until the second detection unit detects the sheet, and to lift up the tray at a second speed lower than the first speed after the second detection unit detects the sheet.

The invention relates to a propulsion device without a gear box for the vector control of a permanent magnet synchronous motor of an electric ship. Two power supplies are respectively electrically connected with an FOC (Field Oriented Control) vector control frequency converter through a propulsion operation platform and a cable; the FOC vector control frequency converter is electrically connected with a permanent magnet brushless synchronous motor through a cable; the permanent magnet brushless synchronous motor is coaxially connected with a rotary transformer and a propeller and mechanically connected with a speed indicating generator; the rotary transformer is electrically connected with the FOC vector control frequency converter through a cable; the speed indicating generator is electrically connected with the combined type propulsion operation platform through a cable; and the speed indicating generator and a storage battery are electrically connected with the FOC vector control frequency converter through cables. The invention directly drives the permanent magnet brushless synchronous motor by adopting the vector control without using the gear box and a brake, thereby optimizing the control characteristics of the electric ship and saving the electric energy.

A method for determining the amount of template nucleic acid present in a sample comprising the steps of: i) bringing into association with the sample all the components necessary for nucleic acid amplification, and all the components necessary for a bioluminescence assay for nucleic acid amplification and subsequently: ii) performing the nucleic acid amplification reaction; iii) monitoring the intensity of light output from the bioluminescence assay; and iv) determining the amount of template nucleic acid present in the sample.

The invention provides an additional variable active intake grille and an vehicle, which relates to the automobile field. The additional variable active intake grille includes a variable active intakegrille frame having a plurality of air inlets; Each air inlet of the variable active air intake grille frame is provided with a rotatable variable active air intake grille blade group; Each set of the variable active intake grille blade sets includes a plurality of variable active intake grille blades; The variable active intake grille is also provided with a driving mechanism for driving a plurality of the variable active intake grille blades to rotate synchronously. The automobile includes a fixed intake grille, and further includes an additional variable active intake grille as described above, the additional variable active intake grille being mounted behind the intake direction of the intake grille, and the inlet of the additional variable active intake grille being sealingly connected to the inlet of the intake grille. The invention solves the technical problem that the wind resistance of the existing automobiles is large.

The invention provides a magnetic circuit structure of a washer variable frequency DC motor, and relates to the technical field of washers. The magnetic circuit structure of the washer variable frequency DC motor comprises a stator iron core, magnetic shoes are arranged on the outer circumference of the stator iron core, and a magnetic yoke is arranged outside the magnetic shoes. The magnetic circuit structure of the washer variable frequency DC motor is characterized in that an N pole and an S pole are formed in the same magnetic shoe through magnetic steel magnetizing, the magnetic shoes are circumferentially and evenly distributed on the magnetic yoke so that each pair of N pole and S pole can deflect relative to the angle of the circle center, harmonic waves of 2p and the multiple of 2p are weakened, the efficiency of the motor is improved, and meanwhile the processing technology is simplified. Twelve magnetic shoes are evenly distributed on the magnetic yoke to form a motor with 12 pairs of poles, and cogging torque can also be weakened. The entire machine working noise caused by torque fluctuation is reduced, meanwhile, the motor can achieve higher torque density, the mechanical hardness of the motor is improved, and revolution drop caused by incremental loading of the motor is reduced. Meanwhile, the system response speed is increased under the condition of the same loads, the acceleration time can be shortened, and the unit eddy-current loss of the stator iron core of the motor can further be reduced.