165results about How to "Guaranteed torque" patented technology

The invention discloses an alternating current permanent magnet synchronous machine control system for an electric vehicle. The system comprises an alternating current permanent magnet synchronous machine, a power convertor, a controller and detectors; the controller is a digital signal processor (DPS); the detectors comprise a position detector and a current detector; the position detector and the current detector input rotor positions/speed signals and current signals, which are detected by the position detector and the current detector respectively, of the alternating current permanent magnet synchronous machine to the DSP; the DSP calculates the given value of the current according to the input rotor positions/the speed signals and compares the given value and the input current detection value to obtain a corresponding control signal, and the alternating current permanent magnet synchronous machine is driven by the power convertor; and the power convertor has a three-phase double-inversion bridge structure consisting of a metal-oxide-semiconductor field effect transistor (MOSFET) inverter and an insulated gate bipolar transistor (IGBT) inverter. The system has the advantages of compact and firm structure, reliable performance, high control efficiency and accuracy and the like and runs stably and a circuit is simple.

The present invention provides a motor torque correction method and device, a motor and a vehicle, and relates to the automobile technology field. It is realized that a permanent magnet synchronous motor still can ensure that the motor outputs torque satisfying demands after attenuation. The main technical scheme of the invention is a motor torque correction method. The method comprises: obtaining the real flux linkage data of a motor; performing correction of d-axis current and q-axis current of the motor according to the real flux linkage data to obtain a d-axis current correction value and a q-axis current correction value; and correcting the output torque of the motor according to the d-axis current correction value and the q-axis current correction value. The motor torque correction method is mainly used for correction of the output torque of the motor to allow the motor to output the torque satisfying demands.

The invention discloses an intelligent electric-driven and pneumatic-type wide seedling strip wheat precision and uniformity seed-metering device. The device comprises a pneumatic multi-row precisionseed meter arranged on a bearing frame, a row seeding conversion manifold block, a wide seedling strip row ditcher and an intelligent collection control circuit part, wherein a seed transport interface is arranged at the upper end of the pneumatic multi-row precision seed meter; the pneumatic multi-row precision seed meter comprises a multi-circle combined discharge plate driven by a servo motor;a seed cleaning knife mechanism is arranged on the multi-circle combined discharge plate; the row seeding conversion manifold block is connected to the lower part of an outlet of the multi-circle combined discharge plate; the wide seedling strip row ditcher is connected to the lower end of the row seeding conversion manifold block; the intelligent collection control circuit part comprises a speedcollection sensor; the speed collection sensor is arranged on a land wheel shaft of a matched machine, collects a land wheel speed and transmits a signal to a touch terminal; an advance speed of a seeding machine is calculated; and the discharge plate outputs a control signal of driving the servo motor to drive the servo motor, thereby matching a rotating speed of the discharge plate with the advance speed of the machine and achieving the stability and consistency of per mu seeding rate and a set value.

The invention provides an engine intelligent idling control system and method. The system comprises an engine rotation speed sensor, an accelerator pedal position sensor, a brake pedal position sensor, a gear sensor, a wheel speed sensor, an electronic stabilization controller, a transmission controller and an engine controller. The engine rotation speed sensor is used for acquiring the current rotation speed of an engine. The electronic stabilization controller is used for calculating the real-time vehicle speed according to the wheel speed. The transmission controller is used for calculatingthe current rotation speed of a transmission according to the current gear and the real-time vehicle speed. The engine controller is used for judging the rotation speed difference between the currentrotation speed of the engine and the current rotation speed of the transmission when a vehicle is in a sliding mode and controlling the actual output rotation speed of the engine according to the rotation speed difference. It can be guaranteed that under a sliding working condition, the rotation speeds of input shafts of the engine and the transmission are synchronous.

The invention belongs to the technical field of well drilling, and discloses a vibration impacting device. The vibration impacting device includes an outer cylinder, a lower connector and a rotating assembly and a fixing assembly which are arranged inside the outer cylinder, the fixing assembly is arranged between the rotating assembly and the lower connector, and the lower connector is connectedwith the outer cylinder and the rotating assembly separately. The rotating assembly includes a connecting piece, an impacting cavity connected to the connecting piece, an impacting hammer arranged inside the impacting cavity, a change-over valve arranged inside the impacting hammer, and a throttle assembly which abuts against the inner wall of the impacting cavity, and the impacting hammer and thechange-over valve are arranged between the connecting piece and the throttle assembly. The connecting piece, the impacting cavity, the impacting hammer, the change-over valve and the throttle nozzleare all of a hollow structure and communicated with one another. The lower connector is connected to the impacting cavity, both the impacting hammer and the change-over valve can rotate in the circumferential direction in a reciprocating mode, the impacting cavity can limit the impacting hammer, the impacting hammer can limit the change-over valve, and therefore it is ensured that torque which a PDC drill bit is subjected to is constant.

The present invention discloses a motorcycle air filter which comprises an air filter casing, an air filter cover, an air filter filtering core, an air inlet pipe and an air outlet pipe, wherein, the air outlet pipe is connected with an air outlet at the wall of the air filter casing; the air filter casing is buckled with the air filter cover; the air filter filtering core is arranged in an inner cavity formed by the air filter casing and the air filter cover; the air filter cover and the air inlet pipe are in an integral structure; the end of the air inlet pipe is open; a tubular air inlet connecting piece is assembled at the air inlet pipe by the open end of the air inlet connecting piece; the closed end of the air inlet connecting piece is provided with an air inlet. The motorcycle air filter can ensure that sufficient air enters into a carburetor, and the air and gasoline are atomized and mixed in the carburetor with good effect by reducing the air inlet resistance of the air filter and enlarging air inlet quantity, so that mixed gas enters into the engine and can burn entirely; the power and the torquemoment of the engine are all ensured; the motorcycle air filter reduces fuel consumption and also effectively reduces the tail gas emission at the same time.

The invention provides an air inlet manifold and an automobile engine comprising the air inlet manifold. The air inlet manifold comprises a pressure stabilizing cavity and at least two air channels which are communicated with the pressure stabilizing cavity, wherein the pressure stabilizing cavity is provided with an air inlet connected with a throttle valve; the joints of the air channels and the pressure stabilizing cavity have unequal filleted structures by which air is uniformly distributed into each air channel after passing through the air inlet and being subjected to pressure stabilization in the pressure stabilizing cavity. Preferably, at the joints of the air channels and the pressure stabilizing cavity, the fillet of a single air channel vertical to the air inlet direction is greater than a fillet in the air inlet direction; at the joints of the air channels and the pressure-stabilizing cavity, the fillet of a first air channel in the air inlet direction is greater than the fillet of a tail air channel, and the fillet of a middle air channel is smaller than the fillets of the first air channel and the tail air channel. By adopting the structure, the air inlet pressure loss can be reduced effectively, the difference among the pressure loss of each air channel is lowered, the air inflow of each cylinder kept uniform while the air inflow of each cylinder is increased, and the power performance and economical efficiency of the engine are improved and increased.

The invention discloses an intelligent torque driving control mechanism. The intelligent torque driving control mechanism comprises a servo motor, a speed reducer and a controller used for monitoring output torque values of the servo motor. The speed reducer is connected with the servo motor, the controller is connected with the speed reducer, and the controller comprises the torque output end which is connected with the outside.

The invention discloses a mining nut dismounting device. The mining nut dismounting device comprises a shell, wherein the inner side wall of the shell is connected with a movable shell in a sliding mode; a motor is fixedly installed in the movable shell; a hydraulic telescopic rod is fixedly installed at the bottom end of the movable shell; the other end of the hydraulic telescopic rod is fixedlyconnected with the shell; an output shaft of the motor penetrates through a bearing sleeve; the output shaft of the motor is connected with a torque sensor; a clamping mechanism is mounted on a transmission shaft of the torque sensor; a lubricating mechanism is mounted on the clamping mechanism, at least one handle is mounted on the side surface and the bottom end of the shell; and a controller and a programming controller are further arranged on the side surface of the shell. According to the mining nut dismounting device, automatic lubrication is carried out according to need during disassembling, so that damage is avoided during disassembling and assembling equipment and nuts, torque required by nuts of different specifications is ensured during assembling, the problem of low safety coefficient caused by unreliable installation is effectively avoided, the mining nut dismounting device is suitable for disassembly and assembly operation of nuts of various specifications, and the disassembly and assembly efficiency of machinery is effectively improved.

The invention relates to a bend and twist combination test machine. When a non-destructive twist test is performed, a stepping motor is used for driving a bevel gear to rotate, so that a test piece which is synchronous with the bevel gear is twisted, and a torque sensor is used for measuring torque acted on the test piece; when a bend test is performed, a fixing lead screw and a nut pair are used for driving parallel slideways fixed on nuts to move, bending force is exerted on the test piece, and at the same time, another lead screw which is perpendicular to the fixed lead screw and a nut pair are used for regulating the position of a force applying point on the test piece; a pressure sensor and a displacement sensor are respectively used for measuring force acted on the test piece and deformation generated by the test piece, the bending tests of a simple support beam, a cantilever beam and an overhanging beam are performed.

The invention provides an automatic disengaging and engaging projectile hoist. The automatic disengaging and engaging projectile hoist comprises a driving device, a projectile shifting wheel, a bracket, a disengaging and engaging device movable block and a disengaging and engaging device fixed block; and an automatic disengaging and engaging device is composed of the disengaging and engaging device movable block and the disengaging and engaging device fixed block, one end of the automatic disengaging and engaging device is connected with a projectile hoisting device, and the other end of the automatic disengaging and engaging device is connected with a decelerator. When a projectile supplied by the automatic disengaging and engaging projectile hoist is in a saturated state, the projectilehoisting resistance of the automatic disengaging and engaging projectile hoist is increased, the disengaging and engaging device is separated, and projectile supplying is stopped; and due to continuous shooting, when the projectile is in an unsaturated state, the projectile supplying resistance is decreased, the disengaging and engaging device is closed, and the automatic disengaging and engagingprojectile hoist starts projectile hoisting again. According to the automatic disengaging and engaging projectile hoist, a ratchet wheel is arranged, so that reverse rotation due to the gravity of projectile chains is effectively prevented; and motor starting is earlier than shooting starting, motor stopping is later than shooting stopping, and thus it is ensured that a projectile box guide is always in a saturated state during shooting. The automatic disengaging and engaging projectile hoist provides power for projectile supplying of a large-aperture gatling weapon, consistency of projectileshooting and projectile supplying is ensured, the projectile hoisting speed is larger than or equal to the shooting speed, and thus the high-speed shooting requirement can be met.

The invention belongs to drilling equipment, and particularly relates to a drilling and soil sample taking double-wall drilling rig. The drilling and soil sample taking double-wall drilling rig comprises a drill pipe, wherein the upper end of the drill pipe is connected with a driving drill pipe through a drill pipe joint; the upper end of the driving drill pipe is connected with a faucet; the lower end of the drill pipe is connected with a drill bit; the drill pipe comprises a drill pipe outer tube and a drill pipe inner tube; the drill pipe inner tube is fixed in the drill pipe outer tube; a drill pipe flushing liquid annular channel is formed between the drill pipe outer tube and the drill pipe inner tube; the driving drill pipe comprises a driving drill pipe outer tube and a driving drill pipe inner tube; the driving drill pipe inner tube is fixed in the driving drill pipe outer tube; a driving drill pipe flushing liquid annular channel is formed between the driving drill pipe outer tube and the driving drill pipe inner tube; an exhausting hole which obliquely extends to the outer wall from the inner wall is formed in the upper portion of the driving drill pipe inner tube; and an upper end opening of the exhausting hole is also provided with a water-stop sealing gasket. The drilling and soil sample taking double-wall drilling rig is simple in structure and convenient to operate; disturbance on soil samples is small during drilling and sample taking; and soil sample taking efficiency is high.

The invention provides a robot joint motor driving circuit. The robot joint motor driving circuit comprises a main control CPU (Central Processing Unit) module, wherein the main control CPU module is connected with a power supply module; the power supply module outputs pure stable direct-current voltage after being started and detected to be errorless; the main control CPU module is connected with a driving power module; the driving power module is used for controlling a brushless motor according to an instruction of the main control CPU module and recording and storing motor working information; the main control CPU module is connected with a detection feedback and protection module; the detection feedback and protection module is used for detecting a working state of a whole system and indicating when the system is abnormal; and the main control CPU module is connected with a communication module and the communication module is connected with an upper computer. According to the robot joint motor driving circuit, better open loop and closed loop control are realized aiming at the brushless motor, and each main control CPU module is used as a node to realize networking control of a plurality of joint motors; and a special driver is not needed any more.

The invention discloses a floating-type navigation mark with a tidal power generation function. The floating-type navigation mark comprises a sealing bin, a vacuum bin and a navigation mark body; thesealing bin is formed in the upper end of the navigation mark body, and a wind speed detector is arranged at the upper end of the sealing bin; a hollow pipe is arranged on one side of the wind speed detector, and a light source is arranged at one end of the hollow pipe; a storage battery is arranged in the sealing bin, and a small electric generator is arranged at the lower end of the storage battery; one side of the small electric generator is provided with a processor; a transmission bin is formed in the lower end of the sealing bin, and a first belt pulley is arranged at the upper end in the transmission bin; a second rotary shaft is arranged on one side of the first belt pulley, and a second belt pulley is arranged on the surface of the second rotary shaft; and a first gear is arrangedat the lower end of the second belt pulley, and a second gear is arranged on one side of the first gear. Through the semi-circular bottom and interference of a rollover-prevention counterweight cone,the navigation mark body is prevented from toppling over, and stability is ensured.

The invention discloses a lamp. The lamp comprises a base, a lamp holder, a lamp arm which is provided with a hollow structure and connected between the base and the lamp holder, a first rotating shaft mechanism located between the lamp arm and the lamp holder and/or between the lamp arm and the base, and a connecting wire, wherein the first rotating shaft mechanism comprises a first rotating shaft part with a penetrating space, a first rotating structure and a first friction structure, a first fixing support with a first wire casing, and a first rotating support with a second wire casing; thefirst rotating support is connected with the first fixing support through the first rotating shaft, and the penetrating space is located between the first rotating structure and the first friction structure; or, the penetrating space surrounds the first rotating structure or the first friction structure; the connecting wire penetrates through the first wire casing, the penetrating space, the second wire casing and the hollow region of the lamp arm so that the lamp holder can be electrically connected with the base. While internal wiring can be achieved, the size of the first rotating shaft part is reduced, and torsion and service life are ensured.

The invention discloses a plastic throttle body, which comprises a wire drawing swing frame, a plastic casing, a reset spring, a throttle valve sheet, a first tapping screw, a throttle valve shaft, a bearing, a limit clamping board, a long groove, a first hanging leg, a second hanging leg and an installing hole insert piece. The installing hole insert piece is pressed into the plastic casing, the bearing is pressed into the plastic casing, the throttle valve shaft penetrates through the bearing and keeps to be connected with the bearing in rolling mode, the limit clamping board is fastened onto the plastic casing through the first tapping screw, the long groove is arranged on the throttle valve shaft, the throttle valve sheet is arranged in the long groove, one end of the reset spring is hung at the first hanging leg, the other end of the reset spring is hung at the second hanging leg, and the wire drawing swing frame is arranged at one end of the throttle valve shaft. The weight of the plastic throttle body is reduced.

The invention discloses a flared tube and joint tightening machine. The problems that the mode of manually tightening a flared tube and a joint is high in labor intensity, high in rejection rate and low in assembly efficiency in the prior art are solved. The flared tube and joint tightening machine comprises a support seat, a nut clamping mechanism, a joint clamping mechanism and a power mechanism; a nut at one end of the flared pipe is fixed through the nut clamping mechanism,the joint is fixed through the connector clamping mechanism, thus, the joint cannot rotate and can move in the radialdirection along with the nut, and the power mechanism is arranged to drive the nut clamping device to rotate and further drive the nut to rotate, and the nut and the joint are tightened; when the nuttightening pressure reaches a preset value, the power mechanism stops working, the nut does not continue to be tightened any more, semi-automatic tightening of the flared tube and the joint can be achieved, the workload of an operator can be reduced, the assembly efficiency can be improved, the assembly quality can be guaranteed, and the cost is reduced.

The invention provides a magnetic disk, a stirring cutter assembly and a food processor. The magnetic disk comprises: a support, wherein the support comprises a bottom support, a plurality of bafflesare arranged in the circumferential direction of the support at intervals, a positioning column is arranged in the middle of the support, and a partition plate is arranged between the side wall of thepositioning column and each baffle; a plurality of magnetic parts, which are clamped between the two adjacent partition plates, wherein bosses extending into the space between the two adjacent partition plates are arranged on the outer surfaces of the magnetic parts, and the outer surfaces of the magnetic parts can abut against at least one baffle; and a cover plate, which is mounted at one end,far away from the bottom support, of the positioning column. The bottom support, the baffles, the positioning columns and the partition plates are of an integrated structure. According to the scheme,a part of the outer surfaces of the magnetic parts can be exposed through the gap between the two baffles, so the blocking of the support on a magnetic field is reduced and the acting force of the disk is increased. The magnetic parts can be partially embedded into the outer side wall of the magnetic disk through the bosses, so that when the two magnetic disks are mounted in a sleeving manner, theradial distance between the inner and outer magnetic parts can be reduced to enhance the torque transmission.

The invention discloses a space vector pulse width modulation method for a multiphase motor fault, and belongs to the technical field of motor control. The invention aims to solve the problem that the common-mode voltage cannot be inhibited by the existing fault-tolerant control method in the case of the open-phase fault of the motor. A novel space voltage vector diagram is obtained by adopting a magnetomotive force conservation principle before and after phase failure and taking maximum torque output as a constraint condition, ten non-zero voltage vectors with the maximum amplitude and the minimum common-mode voltage amplitude are selected, the space voltage vector diagram is divided into ten sectors, sector judgment is carried out on the reference voltage vector, the action sequence of all basic voltage vectors is determined with the minimum number of switching tubes acting each time as an optimization target, and the action sequence and action time of the basic voltage vectors are calculated. According to the invention, the operation performance of the multi-phase motor in a fault state is obviously improved, and the reliability of a speed regulation system is effectively improved.