131results 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 is provided with electric motors (1 and 4) for driving or braking drive wheels (3 and 6), wheel speed detectors (9 to 12) for detecting the wheel speed of the drive wheels and the driven wheels (7 and 8) in an electric drive vehicle provided with an electric motor controller (33) for controlling the electric motors, computing means (22 to 28, 35 to 38) for computing the slip ratio of the drive wheels on the basis of the wheel speeds of the drive wheels and the driven wheels, and a determiner (29) for determining that drive wheels are slipping if the slip ratio exceeds a slip ratio assessment value. At the determiner (29), when the wheel speed of the driven wheels is lower than a set speed (Va2 or Vb2), the slip ratio determination value is modified to the value having the same sign as, and a greater absolute value than, the value (?a2 or ?b2) used when the wheel speed of the driven wheels is greater than the set speed (Va2 or Vb2). As a result, the acceleration time when the vehicle is accelerating and the braking distance when the vehicle is decelerating are shortened and vibration of the electric drive vehicle is suppressed.

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 relates to an efficient acceleration control method for a permanent-magnet synchronous motor. The efficient acceleration control method comprises the steps as follows: the rotating speed of the permanent-magnet synchronous motor is detected in real time and is compared with a target rotating speed; when the rotating speed of the motor is less than k (k is less than or equal to 1) times of the target rotating speed, the permanent-magnet synchronous motor enters an efficient acceleration control mode; the torque axis current iq reaches the maximum stator current value ilim under the limiting conditions of an inverter and the permanent-magnet synchronous motor to obtain the maximum electromagnetic torque, so that the motor always approaches the target rotating speed at the maximum acceleration; the steps are an open-loop control stage; when the rotating speed of the motor reaches k times or more of the target rotating speed, the permanent-magnet synchronous motor quits the efficient acceleration control mode, enters a stable control mode, and is switched into a vector control strategy of id=0; and the permanent-magnet synchronous motor enters double closed-loop control of the current and the rotating speed, so that the motor relatively stably approaches the target rotating speed; and the system stably runs at the expected rotating speed. According to the method, when the permanent-magnet synchronous motor is started or the preset rotating speed greatly changes, the target rotating speed can be reached as soon as possible; the acceleration time of the motor is greatly shortened; and the efficient acceleration control method is simple in structure and easy to realize.

The invention provides a motor control apparatus. A power running / regeneration discriminator (175) uses a torque current command IqCB and a motor rotating speed [omega]m to identify a power running / regeneration status. A limiter (190) enables the torque current command IqCB to pass when a motor (180) is in a power running status, and in a regeneration status, limits the magnitude of the torque current command IqCB according to a limit value IqLIM and enables the torque current command IqCB to pass. A field current command arithmetic unit (135) uses the motor rotating speed [omega]m to identify a rotation status of the motor (180) and calculates a field current command IdC corresponding to the rotation status. A motor drive part (q-axis current controller (130), d-axis current controller (145), a coordinate converter (160), a PWM controller (165) and a power converter (170)) uses the torque current command IqC passed from the limiter and the calculated field current command IdC to drive the motor (180).

The invention discloses a method for making a glass substrate of touch control display equipment. The method is used for making a glass plate into a plurality of glass substrates, and contains the following steps of: comprehensively reinforcing the glass plate on which a patterned electric control line layer is formed, forming a plurality of protective layers, then performing chemical cutting treatment to form the plurality of glass substrates, performing a modification and reinforcement program for side edges of each glass substrate, and finally removing the protective layers. Thus, by chemical cutting treatment of a special reinforced substrate which cannot or is difficult to be physically cut, not only reinforced time of the glass substrate can be greatly reduced, but also the formed protective layers can be removed after the modification and reinforcement program for side edges is ended. In a whole flow step, the time for cutting and reinforcing the glass substrate can be greatly reduced because of flow smooth.

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.

The invention discloses an LED lighting product accelerated attenuation test method based on multilevel stepping stress. The method includes the following steps that first, the value of confidence and the number of samples are set; second, constant humidity stress, multiple stepping temperature stress levels and the total time of a test are set, and the step length time of all the temperature stress and measurement time nodes are set; third, the initial values of the luminous flux of target samples are measured, and luminous flux attenuation trajectory data of the target samples are obtained; fourth, an attenuation mechanism index test is performed; fifth, the pseudo failure life of the target samples is calculated; sixth, a distribution test is performed on the pseudo failure life, and a distribution function is selected; seventh, the distribution parameter of the distribution function is solved, and in combination with an Arrhenius temperature acceleration model, the reliability distribution function, the average life and the median life of the target samples are obtained. Through the method, the flexibility and the universality of a stepping stress test method applied to LED lighting products can be improved, the acceleration time is further shortened, and the accuracy of service evaluation of the accelerated test is improved.

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 provides a guidance and hanging separated cantilever beam composite structure of an integrated climbing frame. The guidance and hanging separated cantilever beam composite structure comprises guide steel beams and hanging steel beams, wherein the guide steel beams and the hanging steel beams have the same cantilever supporting sections, and guide seat fixing ends are arranged at the forefront ends of the cantilever supporting sections of the guide steel beams. When the guidance and hanging separated cantilever beam composite structure is installed, the guide seat fixing ends are connected with integrated climbing frame fixing attachment supports, the outward extension lengths and positions of the cantilever supporting sections of the guide steel beams enable an integrated climbing frame top fixing attachment support and the two supports below floors to form a straight line on the same vertical plane. Unit hanging ends are arranged at the forefront ends of the cantilever supporting sections of the hanging steel beams, and hanging points and frame body bearing and hanging points are vertically coaxial during installation. The tail ends of the cantilever supporting sections of the guide steel beams and the hanging steel beams are fixed to a floor slab concrete structure through T-shaped plate screws and steel base plates. When the local outline or an individual floor of a building structure using the integrated climbing frame has adduction change, the process change of the integrated climbing frame can be decreased and an installation mode can be simplified by means of the guidance and hanging separated cantilever beam composite structure.

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 discloses a method and device for improving the low-speed dynamic property and the acceleration responsiveness of a turbocharged engine. On the one hand, according to the method for improving the low-speed dynamic property and the acceleration responsiveness of the turbocharged engine, gas is supplied to the engine through a turbocharger; and on the other hand, the method further comprises an auxiliary gas supplementation device used for supplementing gas to the engine, and when the engine needs gas supplementation, the auxiliary gas supplementation device is driven to supplement gas to the engine by means of detection of an electronic controller of the engine. The device for implementing the method is further provided. According to the method and device, the dynamic property of low-speed operating of the turbocharged engine can be improved, and the acceleration response time of the turbocharged engine can be shortened.

The invention discloses a control method for torque output of an electric bicycle, and belongs to the technical field of electric mopeds. The method comprises the following steps of Step 1, measuring motor speed n, Step 2, determining a bus current threshold set value ID according to the motor speed n when the motor speed n is greater than 0, Step 3, obtaining sampling current I(f) from a master control circuit, and obtaining a loop current control set value Ip based on a PD (proportion-differential) correction control mode of loop current Ir, and Step 4, obtaining bus current according to a formula that Id is equal to sigma*Ir. According to the control method, the bus current threshold set value ID is adjusted according to the speed, so that the variable bus current replaces the traditional constant current control mode, the torque output in a whole starting process of the electric bicycle from stationary to full speed is increased, the whole process of the electric bicycle from the stationary to the full speed is a gradual acceleration process, the acceleration time of the electric bicycle is shortened, and the smoothness of starting of the electric bicycle is improved.

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.

The invention provides an acceleration method for a propeller engine. The acceleration method comprises the following steps: an acquiring step: acquiring the atmospheric pressure PH, the atmospheric temperature tH*, a flight Mach number M, an accelerator angle alpha and an actual rotating speed n of the engine; calculating step: obtaining a given fuel flow G of fuel and a given propeller blade angle beta n of the propeller according to the acquired data; converting step: converting the given fuel flow G of the fuel into a fuel flow electric signal and converting the fuel flow electric signal into a corresponding fuel flow hydraulic signal; converting the given propeller blade angle beta n of the propeller into a propeller blade angle electric signal and converting the propeller blade angle electric signal into the corresponding propeller blade angle hydraulic signal; a control step: controlling the power of the engine according to the fuel flow hydraulic signal; and controlling the rotating speed of the engine according to the propeller blade angle hydraulic signal. The invention also provides an acceleration system for the propeller engine. The acceleration system comprises an acquisition device, a control device, a fuel metering unit and a propeller blade angle control unit.

The invention relates to improvements on a railway train running method as well as a vehicle and other railway facilities, in particular to a product for reducing railway train stops and improving facilities such as a railway switch, a railway vehicle, a ticket checking machine and so on. To solve a problem that it is hard to get one ticket sometimes due to train service shortage, the invention discloses a novel railway train running method and a matched product for improving the railway vehicle and other railway devices. The traditional railways and vehicles are properly improved so that common trains become non-stop trains; except for stations in which the trains must to stop, the main body part of a train group can run at an optimal economic speed without stopping; people, who need to get on and off the trains in the midway, and articles, which need to loaded to and unloaded from the trains, are gathered in a vehicle with enough power in advance, and the vehicle with the enough power is added to or separated from the train group; and the improved railway switch is switched at a higher speed for the vehicle with the enough power to be added to or separated from the train group. These methods and products are also applicable to railway freight.