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46results about How to "Achieve high torque output" patented technology

Electrically-driven nose wheel steering device for unmanned aerial vehicle

The invention relates to an electrically-driven nose wheel steering device for an unmanned aerial vehicle. The electrically-driven nose wheel steering device comprises a steering drive actuator, a steering torque arm, a link assembly and a drum assembly, wherein a motor in the steering drive actuator drives an output shaft to rotate through a transmission mechanism; the steering torque arm rotates along with the output shaft, the steering torque arm is connected to the link assembly through a knuckle bearing, and the link assembly drives the drum assembly to rotate; and the drum assembly is connected with an upper torque arm of an undercarriage torque arm, and drives nose wheels to steer through the undercarriage torque arm. The electrically-driven nose wheel steering device disclosed by the invention is driven by the motor, has the advantages of being light in weight, high in reliability and maintainability, and the like, as well as is more applicable to undercarriage systems of small and medium-sized unmanned aerial vehicles. The electrically-driven nose wheel steering device disclosed by the invention is obtained through an improvement on the basis of the existing undercarriage structure, and an undercarriage does not need to be re-designed, thus avoiding the high cost brought by the re-designing.
Owner:CHINA ACAD OF LAUNCH VEHICLE TECH

Composite flexural vibration sandwich type double-foot linear ultrasonic motor vibrator

The invention discloses a composite flexural vibration sandwich type double-foot linear ultrasonic motor vibrator, and belongs to the technical field of piezoelectric ultrasonic motors. The vibrator solves the problem that the output thrust of a motor is affected by inconsistent vibration properties of two driving feet of the conventional flexural vibration modal beam type linear ultrasonic motor vibrator. Eight flexural vibration piezoelectric ceramic chips are sleeved on a stud of the vibrator, two end covers are respectively screwed at two ends of the stud to compact the eight flexural vibration piezoelectric ceramic chips, an electrode plate is respectively arranged between the adjacent flexural vibration piezoelectric ceramic chips and between the contact faces of the flexural vibration piezoelectric ceramic chip and the big end face of the end cover, insulating bushes are arranged between the contact faces of all the flexural vibration piezoelectric ceramic chips and the stud and between the contact faces of all the electrode plates and the stud, two thin-wall beams are symmetrically arranged at two sides of the big end face of each end cover, a mounting seat is fixed at the outer side of each thin-wall beam, a driving foot is arranged on the small end face of each end cover, and the driving feet are blocks, the sections of which are in the same shape as the small end faces. The vibrator is suitable for an ultrasonic motor.
Owner:HARBIN INST OF TECH

Cantilever longitudinal-bending composite transducer type cylindrical traveling-wave ultrasonic motor vibrator

The invention relates to a cantilever longitudinal-bending composite transducer type cylindrical traveling-wave ultrasonic motor vibrator belonging to the technical field of piezoelectric ultrasonic motors and solving the problems that the mechanical output capability of a motor is restricted because the prior ultrasonic motor vibrator adopts a metal elastic body to bond piezoelectric ceramic thinplates to excite, and the mechanical output capability and the controllability of an ultrasonic motor are lowered because a plurality of transducers are simultaneously driven. The cantilever longitudinal-bending composite transducer type cylindrical traveling-wave ultrasonic motor vibrator comprises a cylinder and a cantilever longitudinal-bending composite sandwich transducer which are connectedinto a whole by two cantilevers, a fastening screw is fixedly screwed with a rear end cover after passing through central through holes of a front end cover and the two cantilevers, four longitudinalvibration piezoelectric ceramic plates are arranged between the two cantilevers, two pairs of bending vibration piezoelectric ceramic plates are respectively arranged between the front end cover andthe first cantilever and between the rear end cover and the second cantilever, and the adjacent bending vibration piezoelectric ceramic plates and the adjacent longitudinal vibration piezoelectric ceramic plates have opposite polarization directions. The cantilever longitudinal-bending composite transducer type cylindrical traveling-wave ultrasonic motor vibrator is used for the field of manufacturing ultrasonic motors.
Owner:HARBIN INST OF TECH

Rotary motor using composite bending vibration biped linear ultrasonic oscillators

The invention provides a rotary motor using composite bending vibration biped linear ultrasonic oscillators, belonging to the technical field of piezoelectric ultrasonic motors. The invention solves the problems that the existing patch type rotary piezoelectric ultrasonic motor has low coupling efficiency, and the mechanical output capability is difficult to improve. The rotary motor provided by the invention comprises n oscillators, a rotor assembly, a base, n plate springs, n pre-pressing screws and 4n baffle plates, wherein n is a positive integer; the center of the base is provided with a central through hole and a bearing seat; the rotor assembly is arranged in the central through hole; n rectangular section slots are uniformly distributed on the base along the outer circumference direction of the bearing seat; one oscillator is arranged in each rectangular section slot; one plate spring is also arranged in each rectangular section slot; and the two ends of each plate spring are respectively connected fixedly with two installing seats of the oscillator positioned in the rectangular section slot. The rotary motor provided by the invention can realize large-torque output.
Owner:HARBIN INST OF TECH

Magnetic coupling steering device for deep sea glider

InactiveCN106927010AAvoid the disadvantages of high friction, easy wear and water leakageImproves sealing reliabilitySteering ruddersCouplingDrive shaft
The invention belongs to the field of underwater robots, and particularly relates to a magnetic coupling steering device for a deep sea glider. A steering cabin seat is mounted on the deep sea glider, a steering hatch is mounted on the steering cabin seat in a sealed mode, a rudder piece support frame is mounted on the steering hatch, and a rudder shaft is rotatably mounted on the rudder piece support frame; magnetic couplings are mounted on both sides of the steering hatch, the magnetic coupling on one side is located in the steering cabin seat and connected with a transmission mechanism, the magnetic coupling on the other side is located in the rudder piece support frame and connected with one end of the rudder shaft, and the other end of the rudder shaft is connected with the lower end of a rudder piece; the lower end of a stabilizer is mounted on the steering hatch, and the upper end of the stabilizer is rotatably connected with the upper end of the rudder piece; and a driving mechanism drives a transmission shaft to rotate through the transmission mechanism and drives the rudder shaft and the rudder piece to rotate synchronously through the magnetic couplings, and steering of the deep sea glider is achieved. The magnetic coupling steering device for the deep sea glider has the advantages of good airtightness, compact structure, low energy consumption, high reliability, convenient assembly and maintenance and the like.
Owner:SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI

Mating rotary disc of rock core drill

The invention relates to a mating rotary disc of a rock core drill. The mating rotary disc of the rock core drill comprises a shell, an input shaft and a driving gear, a clockwise and anticlockwise operating mechanism, an intermediate gear and an anticlockwise gear are arranged on one side of the driving gear, the clockwise and anticlockwise operating mechanism is used for the driving gear to vertically slide, the intermediate gear is meshed with the driving gear and sleeved with an intermediate shaft when the driving gear slides to the lower side, and the anticlockwise gear is meshed with the driving gear when the driving gear slides to the lower side. The intermediate gear is meshed with the clockwise gear, both the clockwise gear and the anticlockwise gear are sleeved with a hollow shaft, the upper end of the hollow shaft is provided with a rotary plate synchronously rotating with the hollow shaft, two shifters are arranged at the opposite corners of the rotary plate, a driving lever is fastened on the shifters, and the middle of the driving lever is provided with a square drill hole connected with a square drill pipe. Since the driving gear is matched with the clockwise and anticlockwise gears and drives the hollow shaft to drive the rotary plate via the same, the shifters and the driving lever on the shifters can rotate to finally drive the square drill pipe in the square drill hole in the middle of the driving lever to rotate, and large-torque output is realized.
Owner:TIANJIN FUKAICHENG GEOLOGICAL MACHINERY MFG

Robot joint system

The invention discloses a robot joint system. The system comprises resonant oil supply systems 1 (including 1a and 1b), a lower mechanical arm 2, a cylinder piston rod 3, a screw shaft 4 and an upper mechanical arm 5, wherein the resonant oil supply systems 1a and 1b are symmetrically and reversely installed inside the lower mechanical arm 2; the lower mechanical arm 2 comprises a right oil chamber 2a and a left oil chamber 2b; an oil inlet jacket 14 of the resonant oil supply system 1a is communicated with the left oil chamber 2b via an oil hole 2c; an oil outlet jacket 10 of the resonant oil supply system 1b is communicated with the left oil chamber 2b via an oil hole 2d; the screw shaft 4 is installed inside the lower mechanical arm 2; internal and external threads of the cylinder piston rod 3 are respectively matched with an external thread of the screw shaft 4 and an internal thread hole of the lower mechanical arm 2; the screw shaft 4 is driven by hydraulic oil to swing; the upper mechanical arm 5 is installed at the shaft end of the lower mechanical arm 2 via a sliding bearing 11 and is fixed at the right side of the screw shaft 4. The system has the beneficial effect that the flexibility and compactness of robot joints are improved through reasonable integration of the resonant oil supply systems, a screw swing cylinder and the joint screw shaft.
Owner:UNIV OF JINAN

Power wrench

The invention relates to a power wrench. The power wrench comprises a housing, wherein the front end of the housing is equipped with a torque output structure used for torque output; and at least twopower sources which are in transmission connection with the torque output structure and are used for outputting torques of different sizes to the torque output structure separately are arranged on thehousing. According to the power wrench disclosed by the invention, more than one power source is arranged, and each power source outputs torques of different sizes to the torque output structure, sothat different power sources are only needed for outputting torques for different torque output environments. Compared with the prior art, the power wrench has the advantages that different torque output is realized by only one power source and a complex transmission mechanism, and the structure is simple.
Owner:ZHENGZHOU DONGCHEN SCI & TECH

Internal spraying milling and digging machine device

The invention discloses an internal spraying milling and digging machine device, and belongs to an engineering mechanical device. The structure comprises a chassis, a bearing box arranged at the tailend of the chassis, milling and digging heads arranged at the two ends of the bearing box in sleeved modes and an internal spraying waterway penetrating through the inner part of the chassis, the chassis is used for transmitting power to the bearing box, the bearing box is used for driving the milling and digging heads to rotate at high speed, and the spray waterway is used for communicating waterinjection nozzles on the milling and digging heads and high pressure dedusting liquid. The internal spraying milling and digging machine device solves the technical problem of internal spraying of the milling and digging heads; and by reasonably arranging a pipeline and a sealing structure, high efficiency dust removal and ash removal functions of the milling and digging machine device are achieved, the current construction environment is greatly improved, the extensive environmental value and social value are achieved, and the internal spraying milling and digging machine device has great application prospects.
Owner:陕西力明众创机电设备有限公司

Planetary gear type pure electric power-assisted steering gear

The invention discloses a planetary gear type pure electric power-assisted steering gear which comprises a power-assisted motor, a cylindrical gear speed reducing mechanism, a planetary gear speed reducing mechanism, a worm and worm gear speed reducing mechanism, a steering output shaft, a steering input shaft, a shell and a torque sensor. A combined structure of the planetary gear speed reducingmechanism and the cylindrical gear speed reducing mechanism is adopted for reducing the speed and increasing the torque of power output of the power-assisted motor, so that the steering output shaft of the steering gear can output torque and rotating speed which meet use requirements. The worm and worm gear transmission mechanism is used for transmitting the control torsion of a steering wheel andthe reverse feedback of the wheel steering resistance, the power-assisted steering and the steering control are two independent power transmission chains, and the output torque of power-assisted steering and the output torque of steering control are finally gathered on the steering output shaft to be superposed into the working output torque of a product. The limitation of an existing electric power-assisted steering gear in the application field of commercial vehicles is effectively solved, and the pure electric steering gear which is efficient, capable of saving energy, light in steering and good in controllability can be selected for passenger and freight commercial vehicles.
Owner:宁波旰辉智能科技有限公司

Fixed-torque electric spanner

InactiveCN108466217AAccurate conversion of output torqueReduce structural complexitySpannersWrenchesEngineeringForce sensor
The invention relates to a fixed-torque electric spanner. The fixed-torque electric spanner comprises a shell. A torque output structure with the rotating axis stretching in the front-and-back direction is arranged at the front end of the shell, a battery is mounted at the rear end of the shell, a counter-acting force measuring arm is fixedly arranged on the shell, a force detection structure forbeing in force transmission cooperation with a corresponding fixing part to detect acting force borne by the counter-reacting force measuring arm is arranged on the counter-acting force measuring arm,and the force detection structure comprises a force sensor. Torque is output to a bolt or a nut through the torque output structure, when tightened to a certain degree, the bolt or the nut cannot continue to be tightened, according to the acting force and the counter-acting force, the shell can bear counter-acting force at the moment, the force detection structure of the counter-acting force measuring arm is blocked on one fixing part, the counter-acting force borne by the shell at the moment is detected by the force sensor, and the output torque at the position of the torque output structurecan be precisely converted according to the counter-acting force.
Owner:郑州拽亘电子科技有限公司

Power-assisted electric loader driving system

The invention discloses a power-assisted electric loader driving system which comprises a main driving system, the two ends of the main driving system are connected with a front transmission shaft and a rear transmission shaft respectively, the front transmission shaft is connected with a front driving axle, and the rear transmission shaft is connected with a rear driving axle. The power-assisted type electric loader driving system further comprises a power-assisted type auxiliary power system connected with the front transmission shaft, the main driving system and the power-assisted type auxiliary power system are connected with a vehicle control unit, and the vehicle control unit calculates and obtains torque needed under various working conditions.
Owner:SHANGHAI XINGUO POWER TECH CO LTD

Orthogonal transducer type cylindrical traveling-wave ultrasonic motor vibrator

The invention relates to an orthogonal transducer type cylindrical traveling-wave ultrasonic motor vibrator belonging to the technical field of piezoelectric ultrasonic motors and solving the problemsthat the mechanical output capability of a motor is restricted because the prior ultrasonic motor vibrator adopts a metal elastomer to bond piezoelectric ceramic thin plates to excite, and the mechanical output capability and the controllability of an ultrasonic motor are reduced because a plurality of transducers are driven simultaneously. The orthogonal transducer type cylindrical traveling-wave ultrasonic motor vibrator comprises a cylinder and an orthogonal transducer, wherein the orthogonal transducer is formed by orthogonally connecting amplitude rods of a first transducer and a secondtransducer into a whole, both sides of each transducer flange are respectively connected with screw posts which are respectively screwed with the amplitude rods and a rear end cover, the screw posts among the flange, the amplitude rods and the rear end cover are respectively sleeved with piezoelectric ceramic plates and electrode plates, insulating sleeves are arranged among the piezoelectric ceramic plates, the electrode plates and the screw posts, and a plurality of comb-shaped driving teeth are evenly distributed on the inner wall of the cylinder along a circumferential direction. The orthogonal transducer type cylindrical traveling-wave ultrasonic motor vibrator is used for the field of manufacturing ultrasonic motors.
Owner:HARBIN INST OF TECH

High-speed planetary reducer used for new energy automobiles

The invention relates to the field of reducers used for new energy automobiles such as pure electric automobiles and hybrid automobiles, in particular to a high-speed planetary reducer used for the new energy automobiles. The high-speed planetary reducer comprises a reducer box body, output gear rings, an output flange, a sun gear, a planet gear set and a planet carrier. The planet carrier is fixedly connected with the reducer box body through bolts. The output gear rings are fixedly connected with an output shaft. The output shaft is connected with the reducer box body through a first bearing in a rotating manner. The output flange is in key joint with the output shaft. The planet gear set comprises a planet gear, a second bearing and a shaft, wherein the shaft is connected with the planet carrier, and the planet gear is connected with the shaft through the second bearing in a rotating manner and is engaged with the output gear rings. The sun gear is engaged with the planet gear. One-stage planetary transmission is achieved, the speed ratio range is wide, the transmission efficiency is high, large-torque output can be achieved, and the structure is compact. A reducer shell comprises a water tank and a circulation water channel, circulating water cooling is adopted, and the transmission temperature rise of the reducer is low.
Owner:QINGDAO INFINITY PRECISION MACHINE

Composite flexural vibration sandwich type double-foot linear ultrasonic motor vibrator

The invention discloses a composite flexural vibration sandwich type double-foot linear ultrasonic motor vibrator, and belongs to the technical field of piezoelectric ultrasonic motors. The vibrator solves the problem that the output thrust of a motor is affected by inconsistent vibration properties of two driving feet of the conventional flexural vibration modal beam type linear ultrasonic motor vibrator. Eight flexural vibration piezoelectric ceramic chips are sleeved on a stud of the vibrator, two end covers are respectively screwed at two ends of the stud to compact the eight flexural vibration piezoelectric ceramic chips, an electrode plate is respectively arranged between the adjacent flexural vibration piezoelectric ceramic chips and between the contact faces of the flexural vibration piezoelectric ceramic chip and the big end face of the end cover, insulating bushes are arranged between the contact faces of all the flexural vibration piezoelectric ceramic chips and the stud and between the contact faces of all the electrode plates and the stud, two thin-wall beams are symmetrically arranged at two sides of the big end face of each end cover, a mounting seat is fixed at the outer side of each thin-wall beam, a driving foot is arranged on the small end face of each end cover, and the driving feet are blocks, the sections of which are in the same shape as the small end faces. The vibrator is suitable for an ultrasonic motor.
Owner:HARBIN INST OF TECH

Control method and device of frequency conversion air conditioner and frequency conversion air conditioner

The invention relates to a control method and device of a frequency conversion air conditioner and the frequency conversion air conditioner. The control method of the frequency conversion air conditioner comprises the steps of determining a target frequency f of the air conditioner in operation according to outdoor environment temperature Tao; judging the relation between the target frequency f and a boundary point frequency f4 of a winding of a motor of an air conditioner compressor, and controlling the mode and operation frequency of the winding of the motor of the air conditioner compressoraccording to a comparison result of a frequency comparison module, and in the frequency adjusting process, if the frequency of the air conditioner is directly adjusted to the target frequency f without passing through the winding boundary point frequency f4, an oil return stop platform is inserted when the air conditioner frequency is adjusted to the target frequency f. According to the control method of the frequency conversion air conditioner, state conversion of the coil winding and the target frequency f of the air conditioner and control over air conditioner oil return can be combined, precise control over operation of the air conditioner is achieved, and the air conditioner operation energy efficiency can be improved.
Owner:QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD +1

Control method and control device of variable frequency air conditioner and variable frequency air conditioner

The invention relates to a control method and a control device of a variable frequency air conditioner and the variable frequency air conditioner. The control method of the variable frequency air conditioner comprises the steps that the target frequency f of air conditioner operation is determined according to the outdoor environment temperature Tao; and a relation between the target frequency f and the winding demarcation point frequency f4 of a motor of an air conditioner compressor is judged, the motor winding mode and the oil return pause strategy of the air conditioner are determined according to the relation between the target frequency f and the winding demarcation point frequency f4, and oil return pause platforms are correspondingly inserted in the process of adjusting the air conditioner frequency to the winding demarcation point frequency f4 and adjusting the winding demarcation point frequency f4 to the target frequency f. According to the control method of the variable frequency air conditioner, the target frequency f of the air conditioner, state switching of the coil winding and air conditioner oil return control can be combined, fine control over operation of the air conditioner is achieved, and the operation energy efficiency of the air conditioner is improved.
Owner:QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD +1

Frequency conversion air conditioner control method and device and frequency conversion air conditioner

The invention relates to a frequency conversion air conditioner control method and device and a frequency conversion air conditioner. The frequency conversion air conditioner control method comprisesthe steps that target frequency f of running of the air conditioner is determined according to the temperature Tao of the outdoor environment; and the relation between the target frequency f and the winding demarcation point frequency f4 of an electric motor of an air conditioner compressor is judged, the motor winding mode and an oil return pause strategy of the air conditioner are determined according to the relation between the target frequency f and the winding demarcation point frequency f4, and an oil return pause platform is inserted one time in the process of adjusting the air conditioner frequency to the target frequency f from the winding demarcation point frequency f4. According to the frequency conversion air conditioner control method, the target frequency f of the air conditioner can be combined with state switching of a coil winding and air conditioner oil return control to achieve precise control over the running of the air conditioner, and the running energy efficiencyof the air conditioner can be improved.
Owner:WUHAN HAIER ELECTRONICS CO LTD +2

Control method and control device of variable frequency air conditioner and variable frequency air conditioner

The invention relates to a control method and a control device of a variable frequency air conditioner and the variable frequency air conditioner. The control method of the variable frequency air conditioner comprises the steps that the target frequency f of air conditioner operation is determined according to the outdoor environment temperature Tao; and the relation between the target frequency fand the winding demarcation point frequency f4 of a motor of an air conditioner compressor is judged, and air conditioner motor winding modes and oil return pause strategies are determined accordingto the relation between the target frequency f and the winding demarcation point frequency f4. According to the control method of the variable frequency air conditioner, the target frequency f of theair conditioner, state switching of the coil winding and air conditioner oil return control can be combined, fine control over operation of the air conditioner is achieved, and the operation energy efficiency of the air conditioner is improved.
Owner:QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD +1

An electro-fluid dual-run drive system

The invention discloses an electric fluid type double-running driving system which comprises a battery set. The battery set is connected with a current converter, the current converter is connected with a driving motor, the driving motor is connected with a speed reducer, the speed reducer is connected with a double-acting liquid booster pump, a liquid outlet end of the double-acting liquid booster pump is connected with a load hydraulic motor, the load hydraulic motor is connected with a main driving shaft by a planetary speed reducer, another liquid outlet end of the double-acting liquid booster pump is connected with a driving hydraulic motor, the driving hydraulic motor is connected with a first T-shaped speed reducer, the first T-shaped speed reducer is provided with power generators, the power generators are connected with IGBT (insulated gate bipolar transistor) switching power supplies, the IGBT switching power supplies are connected with first intermittent discharge units, the first intermittent discharge units are connected with a Faraday module capacitor, the Faraday module capacitor is connected with a second intermittent discharge unit, and the second intermittent discharge unit is connected with the battery set. The electric fluid type double-running driving system has the advantages that currents of the storage battery set for providing power can be compensated, accordingly, the balance of the storage battery set can be improved, and the endurance mileage of the storage battery set can be increased.
Owner:杨旭

Execution system for driving automobile gearbox to shift gears

PendingCN112539250ALow costCompensation for gap lossPortable liftingToothed gearingsLow noiseGear wheel
The invention relates to an execution system for driving an automobile gearbox to shift gears. The execution system comprises a shell, a direct-current motor is arranged on one side of an inner cavityof the shell, the direct-current motor is in driving connection with a worm through an output shaft, the worm is positioned on the other side of the shell, a turbine is arranged in the shell througha rotating shaft, the turbine is positioned above the worm, and the worm meshes with the turbine; the rotating shaft is provided with a gear, the gear is further embedded in the center of the turbineand synchronously rotates along with the turbine, a rotating output shaft is arranged in the shell, the rotating output shaft is provided with a fan-shaped gear which synchronously rotates, the fan-shaped gear meshes with the gear, a control circuit board is arranged in the shell, and a sensor is arranged on the front face of the control circuit board; and the fan-shaped gear is provided with a magnet, the magnet is located above the sensor, when the fan-shaped gear rotates, the magnet is driven to rotate synchronously, and the magnet and the sensor are arranged in a matched mode. The performance of low cost, miniaturization, low noise and the like of the execution system is realized.
Owner:智蔻科技(苏州)有限公司

Longitudinal and bending composite mode sandwich two-foot ultrasonic linear motor oscillator with elastic support

ActiveCN102355160BLongitudinal vibration energy utilization rate is highSimple structurePiezoelectric/electrostriction/magnetostriction machinesUltrasonic linear motorPrism
The invention relates to a longitudinal and bending composite mode sandwich two-foot ultrasonic linear motor oscillator with an elastic support, and relates to the technical field of piezoelectric ultrasonic motors. The problems that the traditional ultrasonic motor oscillator has insufficient vibrational energy utilization and restricted mechanical output capability are solved. The oscillator comprises two end covers, two pairs of longitudinal vibration piezoelectric ceramic chips, two pairs of bending vibration piezoelectric ceramic chips, a stud, four mounting seats, four thin-walled beams, an insulating sleeve, nine electrode chips and two friction plates, wherein the end cover is a tapered quadrangular prism body with a rectangular section, the small end surface of the end cover is used as a driving foot, the friction plates are fixed in through grooves of the small end surfaces of the end covers, and the end covers are respectively screwed on the two end parts of the studs through threaded holes on the large end surfaces of the end covers, so that the bending vibration piezoelectric ceramic chips and the longitudinal vibration piezoelectric ceramic chips are tightly pressed between the two end covers. The invention can be applied to the field of ultrasonic motor production.
Owner:HARBIN INST OF TECH

Control method and control device of variable frequency air conditioner and variable frequency air conditioner

The invention relates to a control method and control device of a variable frequency air conditioner and the variable frequency air conditioner. The control method of the variable frequency air conditioner comprises the steps that the target frequency f of air conditioner operation is determined according to the outdoor environment temperature Tao; the relation between the target frequency f and the winding demarcation point frequency f4 of a motor of an air conditioner compressor is judged, and an oil return pause platform is inserted in the process that the air conditioner frequency is adjusted to the winding demarcation point frequency f4 and the winding demarcation point frequency f4 is adjusted to the target frequency f; and the frequency of the oil return pause platform inserted in the process that the air conditioner frequency is adjusted to the winding demarcation point frequency f4 is smaller than the frequency of the oil return pause platform inserted in the process that theair conditioner frequency is adjusted to the target frequency f from the winding demarcation point frequency f4. According to the control method of the variable frequency air conditioner, the target frequency f of the air conditioner, state switching of the coil winding and air conditioner oil return control can be combined, fine control over operation of the air conditioner is achieved, and the operation energy efficiency of the air conditioner is improved.
Owner:QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD +1

Exoskeleton knee joint module and exoskeleton robot

The present disclosure provides an exoskeleton knee joint module, comprising: a reducer, including an input end and an output end; a torsion spring base connected with the output end; a casing sleeved on the reducer, and a first end of the casing is An arc-shaped chute is arranged on the end surface; a torsion spring is sleeved on the casing, and both ends of the torsion spring are fixedly connected with the torsion spring base and the first end respectively; a plurality of magnetorheological fluid bearings are sleeved on the reducer at intervals On the upper side, the inner ring of the magnetorheological fluid bearing is connected with the reducer, and the outer ring of the magnetorheological fluid bearing is connected with the outer shell; the excitation coil is arranged between two adjacent magnetorheological fluid bearings; two one-way bearings , the inner ring is sleeved on the shaft of the input end respectively, and the overtaking directions of the two one-way bearings are the same; the first connecting piece is sleeved on the outer ring of one one-way bearing, and the first connecting piece is provided with a boss, the convex The table is slidably clamped in the arc-shaped chute; and the second connecting piece is sleeved on the outer ring of the other one-way bearing. The present disclosure also provides an exoskeleton robot.
Owner:龚兴龙 +2

Control method and control device of variable frequency air conditioner as well as variable frequency air conditioner

The invention relates to a control method and control device of a variable frequency air conditioner as well as the variable frequency air conditioner. The control method of the variable frequency airconditioner comprises the steps that the target frequency f of air conditioner operation is determined according to the outdoor environment temperature T<ao>; and the relation between the target frequency f and the winding demarcation point frequency f4 of a motor of an air conditioner compressor is judged, and the winding mode of the motor of the air conditioner is determined according to the relation between the target frequency f and the winding demarcation point frequency f4. According to the control method of the variable frequency air conditioner, the target frequency f of the air conditioner and state switching of coil winding can be combined, so that fine control over operation of the air conditioner is achieved, and the operation energy efficiency of the air conditioner is improved.
Owner:QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD +1

Orthogonal transducer type cylindrical traveling-wave ultrasonic motor vibrator

The invention relates to an orthogonal transducer type cylindrical traveling-wave ultrasonic motor vibrator belonging to the technical field of piezoelectric ultrasonic motors and solving the problems that the mechanical output capability of a motor is restricted because the prior ultrasonic motor vibrator adopts a metal elastomer to bond piezoelectric ceramic thin plates to excite, and the mechanical output capability and the controllability of an ultrasonic motor are reduced because a plurality of transducers are driven simultaneously. The orthogonal transducer type cylindrical traveling-wave ultrasonic motor vibrator comprises a cylinder and an orthogonal transducer, wherein the orthogonal transducer is formed by orthogonally connecting amplitude rods of a first transducer and a secondtransducer into a whole, both sides of each transducer flange are respectively connected with screw posts which are respectively screwed with the amplitude rods and a rear end cover, the screw posts among the flange, the amplitude rods and the rear end cover are respectively sleeved with piezoelectric ceramic plates and electrode plates, insulating sleeves are arranged among the piezoelectric ceramic plates, the electrode plates and the screw posts, and a plurality of comb-shaped driving teeth are evenly distributed on the inner wall of the cylinder along a circumferential direction. The orthogonal transducer type cylindrical traveling-wave ultrasonic motor vibrator is used for the field of manufacturing ultrasonic motors.
Owner:HARBIN INST OF TECH

A speed limit control method for distributed electric drive vehicles

The invention discloses a distribution type electrically driving vehicle speed limit control method. Accelerator pedal information is firstly collected, torque T0 given by a accelerator pedal is calculated, then the current rotating speed value Ni, allowable maximum torque Tmaxi, allowable maximum working rotating speed Nmaxi and disoperation condition information Si of all driving motors are collected, motor rotating speed Nmax corresponding to the highest vehicle speed allowable highest vehicle speed of an existing vehicle and the average rotating speed Navg of a non-fault motor are calculated, the amount of the motor rotating speed Nmax and the amount of the average rotating speed Navg are prepared, the smaller one is the speed limiting value Nlimit of all driving motors, and the torqueorder of all driving motors are calculated according to a speed limiting and controlling unit. According to the distribution type electrically driving vehicle speed limit control method, the difficult problem that control of all driving motors and a whole vehicle speed of a distribution type electrically driving vehicle is complex is efficiently solved, and requirements of vehicle high speed limiting and controlling of part of the motors are reconciled.
Owner:江苏迈吉易威电动科技有限公司
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