40 results about "Maximum torque" patented technology

The application provides a permanent magnet synchronous motor weak magnetic transition area smooth transition method and system based on a reference voltage adaptive reduction, and belongs to the field of permanent magnet synchronous motor control. The method solves the problem of torque fluctuation caused by voltage overshoot in the existing voltage closed-loop weak magnetic control with a fixed reference voltage. The method comprises the following steps: obtaining a theoretical maximum torque according to a preset current limit value by simultaneously solving a torque equation and a current constraint equation; calculating torque ratio parameters and speed ratio parameters in real time; calculating a reference voltage adaptive coefficient based on an adaptive smooth transition algorithm; multiplying the adaptive coefficient by the inscribed circle voltage of an inverter to dynamically adjust the reference value of the voltage closed loop, so that smooth control of the weak magnetic transition area is realized. The method is mainly used in the fields of electric aircrafts, electric vehicles and robots.

This invention discloses a sensorless adaptive starting method for a high-speed permanent magnet synchronous motor. The method first... I‑f A high-speed permanent magnet synchronous motor under starting conditions is modeled. Based on this, a speed differential damper is designed to compensate for the reference speed, increase the system damping ratio, and improve starting stability. Then, an extended state observer-phase-locked loop structure is constructed to demodulate the position, speed, and speed differential, providing a basis for the adaptive starter controller and the speed differential damper. Finally, an adaptive starter controller is designed to coordinate the adjustment of the current vector amplitude and acceleration, ensuring that the motor always operates near the maximum torque-to-current ratio operating point, balancing stability, speed, and high efficiency.

The application discloses a wind turbine load control method and system under the condition of stuck blade, which calculates the real-time hub bending moment and hub bending moment change rate through the blade root load of the wind turbine, predicts the hub bending moment of multiple time periods in the future according to the hub bending moment and the hub bending moment change rate, and obtains the predicted hub bending moment of different time scales; the pitch rate of the wind turbine is dynamically adjusted according to the predicted hub bending moment of different time scales, the pitch rate is doubly adjusted in the azimuth angle interval where the fault blade contributes most to the hub bending moment in combination with the azimuth angle information of the wind turbine; and the maximum torque output and yaw action of the wind turbine are simultaneously controlled. The algorithm is simple and effective, can greatly reduce the load of the main part of the wind turbine under the condition of stuck blade, improve the safety of the wind turbine, reduce the design cost of the wind turbine, and reduce the power generation loss of the wind turbine under the condition of stuck blade.

The application discloses a kind of self-adapting permanent magnet synchronous motor fault-tolerant control methods based on dynamic phase-locked loop, first, by analyzing the operating characteristics under minimum copper loss mode and maximum torque mode, a unified reference current strategy is constructed in harmonic subspace.Second, the second-order generalized integrator phase-locked loop is used to extract the fault current angle, ensuring that reliable angle estimation can be achieved under light load conditions.In addition, the fault angle information obtained by identification is used to adjust the current reference parameters, allowing flexible switching between minimum copper loss and maximum torque operating modes without the need for additional control structures related to fault types.The application has a smooth dynamic process when the motor switches from the fault state to the fault-tolerant running state without additional hardware.

Control unit for estimating the traction of a vehicle, comprising the following: a monitoring module that monitors wheel torque values; a determination module for determining maximum torque values ​​by obtaining and storing empirical data while driving on a surface, wherein the maximum torque values ​​are the wheel torque values ​​immediately before wheel slippage; a prediction module that predicts a traction threshold based on the maximum torque values, where the traction threshold is based on a stochastic model of the maximum torque values; and a control module that outputs a signal indicating the traction threshold.

The application relates to the technical field of gearboxes, in particular to a stepless gearbox for a high-horsepower electric tractor and a use method, which comprises a gearbox shell, a driving shaft is rotationally connected in the interior of the gearbox shell, a motor is fixedly installed on the gearbox shell, the output shaft of the motor is fixedly connected to one end of the driving shaft, a first gear is fixedly connected to the surface of the driving shaft, an inner gear ring is rotationally connected in the interior of the gearbox shell, a transmission shaft is rotationally connected to the shaft center of the inner gear ring, a second gear is fixedly connected to one end of the transmission shaft, and the second gear and the first gear are mutually meshed; the stepless gearbox is realized by single power transmission, in a high-load working scene, power output is converted into maximum torque, and the intervention of a speed change mechanism in power output is removed, so that the pressure wear of the speed change mechanism is effectively reduced, and the service life of equipment is prolonged.

This invention relates to a tool for the automatic placement of manual rivets, based on the rotation of a threaded shank that moves a deformable sleeve over the indeformable body of the rivet until the threaded inner shank breaks at a fracture groove. The tool utilizes a polygonal nut housing for manual rivets, secured with a combination of claws and a retractable pin, while the threaded shank is inserted into a rotating key with limited stroke and torque to engage the drive face, and then rotated multiple times on a preloaded rotating shaft to generate maximum torque for riveting. All of this is associated with a rotatable actuator located externally to the tool. The main advantage of this tool is that it allows for the automated use of manual rivets and can be connected to an automated system, whereas previously only manual tools were provided for insertion, thus avoiding the need for a dual inventory.

This invention proposes a maximum torque-to-current ratio control method and system considering the inductor nonlinearity of a permanent magnet synchronous motor (PMSM), belonging to the field of motor technology. The method includes alternating injection of a voltage square wave at a frequency one-quarter of the control frequency, extracting the difference current between two control cycles, and identifying the fully incremental inductance containing cross-coupled inductance under various operating conditions. The cross-coupled inductance is divided into relative position mutual inductance and flux linkage saturation mutual inductance. Under unsaturated conditions, the relative position mutual inductance is used to calculate the actual position coordinate system angle. Under saturated conditions, the flux linkage saturation mutual inductance is obtained through a mutual inductance iteration method to calculate the decoupling coordinate system angle. A high-order sliding mode observer is used to fit the back electromotive force to observe the permanent magnet flux linkage and phase resistance parameters. The optimal current angle is calculated in the decoupling coordinate system to achieve maximum torque-to-current ratio control. This invention considers the influence of PMSM inductor nonlinearity on maximum torque-to-current ratio control, improving control accuracy and robustness, and achieving higher system efficiency.

This invention provides a control method for an electronic differential limiting device that can temporarily increase the maximum torque. Even when the maximum torque of the electronic differential limiting device is applied and the wheel slip increases to a certain level or its rate of increase is relatively fast, by temporarily increasing the maximum torque upward to the design margin, the maximum wheel speed difference can be reduced and the time required for the wheel speed difference to converge can be reduced.

This invention discloses a system and method for testing the swing torque of an intermediate shaft fork, relating to the field of steering system testing technology. The system includes an industrial computer, a PLC motion controller, a servo motor driver, a data acquisition board, a barcode scanner, a load module, and a MES traceability system. The data acquisition board is used to synchronously acquire torque and angle signals; the PLC motion controller is used to read the product code and control the swing test; the host computer software is used to display the torque-angle variation curve during the swing of the inner and outer forks in real time, and calculates the maximum, minimum, range, and maximum torque fluctuation per 5° after the test, outputting the test results. The product code, test data, and test results are bound and stored in agreed addresses on the industrial computer and PLC respectively for the MES traceability system to read. This invention enables rapid, intuitive, efficient, accurate, and traceable testing of the swing torque of the intermediate shaft fork.

The application relates to an engine plateau maximum power control strategy and a control system, and relates to the field of engine control, and comprises the following steps: determining a map serial number: according to the current altitude where a vehicle is located, a map serial number is obtained through table lookup; determining a maximum basic torque: the maximum basic torque is obtained through table lookup according to the map serial number and the current intake temperature; post-intercooling temperature correction: a first torque correction value is obtained through table lookup according to the post-intercooling temperature, the maximum basic torque is corrected by using the first torque correction value, and a corrected maximum torque is obtained; pre-turbine temperature correction: a second torque correction value is obtained through table lookup according to the pre-turbine temperature, the corrected maximum torque is corrected by using the second torque correction value, and a final maximum torque is obtained. The maximum power control strategy and the control system consider the influence of plateau temperature on engine power, and can make the engine exert maximum power under the condition of ensuring safety.

The invention discloses a non-feedback propeller motor low-energy-consumption control method integrating active disturbance rejection and resonance suppression, and belongs to the technical field of motor driving control. Aiming at a hardware constraint that a direct current bus cannot feed back, the method comprises the following steps: firstly, establishing a propeller system energy consumption model; secondly, an asymmetric minimum energy rotating speed switching track is generated, an S-shaped polynomial curve is adopted in the acceleration stage to reduce copper consumption, and pseudo-coasting control is conducted through the natural resistance characteristic of propeller loads in the deceleration stage; meanwhile, a linear active disturbance rejection controller (LADRC) is constructed to observe and compensate external load disturbance in real time, current vector distribution is optimized by combining a maximum torque current ratio (MTPA) strategy in a current loop, and a quasi-resonance controller is connected in parallel to suppress specific harmonic torque ripple. According to the invention, the problems of high energy consumption, poor anti-interference performance and operation noise in the rotating speed switching process of the large-inertia propeller motor are effectively solved, and energy optimization and mute operation of the system are realized.

The application discloses a damper, a power assembly and a vehicle, and relates to the technical field of dampers, and comprises a mass disc, a centrifugal pendulum assembly and a damping elastic element. The mass disc is suitable for being connected with an engine, and the mass disc has a first rotating part. The centrifugal pendulum assembly comprises a flange and a first centrifugal block. The flange has a second rotating part, and the mass disc drives the flange to rotate by pushing the second rotating part through the first rotating part when the mass disc rotates. The first centrifugal block is slidably installed on the flange in the rotating direction of the flange. The damping elastic element is located between the first rotating part and the second rotating part, and the damping elastic element transmits the driving power for rotating the flange by being compressed by the first rotating part and the second rotating part. A torque limiting assembly is suitable for being connected with a gearbox, and the torque limiting assembly is in contact with the flange. The torque limiting assembly limits the maximum torque transmitted to the gearbox by the friction between the torque limiting assembly and the flange. The damper according to the embodiment of the application not only has the function of limiting torque, but also has the advantages of good damping effect, smooth torque transmission and the like.

The application belongs to the technical field of motor system control, and discloses a motor feasible task design method based on motor performance parameters and controller structure, which comprises the following steps: first, determining two types of motor performance parameters of the maximum torque and the peak power of the selected motor; second, based on Euler-Lagrange equation, establishing motor dynamics differential equation containing unknown rotational inertia, unknown friction resistance, and describing the characteristics of motor generalized speed; third, designing an adaptive controller to realize speed tracking control and online estimation of unknown rotational inertia, unknown friction resistance and unknown external disturbance; fourth, based on motor performance parameters and adaptive controller structure, establishing task feasibility constraint inequality, and determining motor feasible task in combination with the task load condition. The application can realize the analysis and determination of motor feasible task based on the control strategy and the maximum speed and the maximum torque of the motor without experimental test.

The application discloses a kind of optimization method, device and vehicle for the roar of acceleration and braking of hybrid vehicle, the method comprises: obtaining the current speed of vehicle and front electric drive request torque;Determine whether the current speed is less than or equal to the preset speed, and determine whether the front electric drive request torque is greater than or equal to the allowable maximum torque of the powertrain suspension system of vehicle;If both are satisfied, the current state of vehicle engine is obtained;If the current state is not started, the engine start is prohibited;If the current state is started, the engine stop is controlled.The method can avoid the roar frequency band in the process of acceleration and braking by controlling the start and stop of engine without changing hardware, and effectively solve the roar and reverse disc vibration problem.

This application proposes a robot operation control method, electronic device, and robot. The method includes: acquiring parameter information and operating condition information of the target robot, wherein the parameter information includes: the arm length, reduction ratio, rated torque of the motor corresponding to the target joint, and motor torque limit of the target robot; the operating condition information includes: load mass and load motion trajectory; based on a dynamic model and according to the parameter information and operating condition information, determining the torque information of the target joint during the execution of the target task by the target robot, wherein the torque information includes: maximum torque and / or average torque; and adjusting the operating parameters of the target joint of the target robot according to the torque information, wherein the operating parameters include: operating speed and / or operating acceleration, which can realize the pre-control of the operating speed and / or operating acceleration of the target joint of the target robot to protect the operating safety of the motor corresponding to the target joint and maximize the efficiency of the motor corresponding to the target joint.

This invention relates to a crankless piston internal combustion engine and its operating method, which can be widely applied to various motor vehicles and stationary engines. Engines according to this invention will provide higher economic efficiency and longer service life during operation. The engine efficiency according to this invention is achieved by applying a basic kinematic scheme that converts the linear reciprocating motion of the piston into the rotational motion of the engine drive shaft (9). The piston (21) performing the working cycle stroke completes its full working stroke by rotating the drive shaft (9) by 90°, instead of 180° as in conventional engines. Each stroke begins with drive gear sets (10, 11, 12, 13) (each set corresponding to one piston (21)) arranged at an angle of approximately 45° relative to the direction of piston (21) motion, and the sets are offset from each other by approximately 90°. The offset angles between the drive gear sets, starting with the drive teeth of the "expansion" stroke, are arranged at different angle values, allowing two, three, or more "expansion" strokes to be performed simultaneously. Each piston stroke does not begin with a zero torque value, but rather with a value equal to the maximum torque value of the crank-driven engine. According to the present invention, the engine torque and power values ​​are approximately three times, six times, and nine times that of an engine with a crank mechanism, respectively, at the same speed.

This invention discloses a fault-tolerant control method for a two-phase four-switch permanent magnet synchronous motor based on MPC. After an inverter switch failure, this method connects the motor neutral point to the DC power supply midpoint and reconfigures the inverter into a two-phase four-switch fault-tolerant operating topology using the remaining switches. The control system adopts a dual-loop structure. The outer loop controls the motor speed through a PI regulator and provides torque and flux linkage reference values ​​to the inner loop based on the maximum torque-to-current ratio. The inner loop employs model predictive direct torque control, using the stator voltage equation and stator current prediction model to obtain predicted flux linkage and torque values. The optimal switching state of the inverter is obtained using a value function, and the remaining switches are controlled to achieve fault-tolerant operation of the motor after a switch failure. This invention enables stable system operation even after a switch failure without requiring control strategy switching, effectively improving the safety and reliability of permanent magnet synchronous motor operation.

The invention relates to a method and a device for tracking a minimum torque per ampere condition for controlling an electrical machine using direct flux vector control. The invention: - determines a torque reference; - determines a provisional flux target from the torque reference using a torque-flux dependency rule; - determines a flux target by adding a low frequency flux signal to the provisional flux target; - controls the electrical machine using direct flux vector control according to the flux target; - measures the current provided to the electrical machine at at least three time events, which are times at which the low frequency flux signal has different values; - estimates a maximum torque per ampere flux from the measured currents; - updates the dependency rule according to the estimated maximum torque per ampere flux.

The utility model discloses a network wiring winding device, has effectively reached the purpose of conveniently winding different model wire coil, including support frame, the middle part fixed connection of support frame has a support sleeve, the inside of support sleeve is equipped with a rotatable power axle, the middle part rotatable connection of support sleeve has a conical sleeve, the outside of support sleeve right part is equipped with a plurality of rotatable drive wheel with power axle rotation, and the drive wheel is equipped with an adjusting rod for adjusting the position of drive wheel between every drive wheel and support sleeve, the outside of support sleeve detachable connection has a wire coil, the utility model novel structure, the clever idea is simple and convenient to operate, and effectively the winding of wire harness is facilitated, reduces the probability that wire harness is damaged by excessive tension, increases the function of limiting the maximum torque, can drive the wire coil of different aperture.

The vertical pressure involved in the cigarette stacking unit overall rotation method is based on the vertical pressure of the involved cigarette packing machine assembly, which is used to drive the stacking unit to make horizontal rotary motion; the vertical pressure of the involved cigarette packing machine assembly includes a lower turntable device and an upper pressure disc device; the upper pressure disc device includes an upper pressure disc and a rotary lifting drive assembly; the rotary lifting drive assembly includes a motor A, a nut, a lead screw, a guide seat, a limit block, a stop block and a spring; the upper pressure disc rotates against the rotation limit of the limit block, and the minimum torque required is T1; the upper pressure disc and the lead screw rotate relative to each other, and the minimum torque required is T2; the maximum torque output by the motor A is T3; then T3>T1>(1+a)T2; the method is as follows: 1, stacking the stacking unit; 2, driving the stacking unit to rotate. The present application can realize the overall rotation of the stacking unit on the lower turntable, and provides necessary method and structure support for realizing the automatic film wrapping and packaging of the involved cigarette.

A gearmotor assembly comprises a stepper motor, a reduction gearbox, and a torque limiter. The stepper motor is configured to receive input power to selectively rotate a motor shaft about a motor axis. The reduction gearbox includes a reduction gear assembly, a motor shaft coupling configured to operably couple the motor shaft and the reduction gear assembly, and a gearbox coupling operably coupled to the reduction gear assembly and having a gearbox coupling axis. The torque limiter is positioned to operably couple the stepper motor, the reduction gear assembly, and the gearbox coupling when a relative net torque between the stepper motor, the reduction gear assembly, and the gearbox coupling is below a maximum torque and to operably decouple the stepper motor, the reduction gear assembly, and the gearbox coupling when the relative net torque is at or above the maximum torque.

A motor control device includes: a field-weakening control unit that performs field-weakening control based on a motor voltage command value; and a current command limit unit that limits each of a d-axis current command and a q-axis current command based on a current limit value. The field-weakening control unit increases a magnitude of the d-axis current command such that the motor voltage command value follows an output voltage maximum value when the motor voltage command value is equal to or larger than the output voltage maximum value. The current command limit unit sets the current limit value at a maximum torque current value corresponding to a rotation speed of a motor.

The application discloses a kind of hydraulic expansion sleeve couplings and oil injection method of hydraulic expansion sleeve coupling, belong to hydraulic expansion sleeve coupling oil injection technical field.Oil injection method includes: the screw position of pressure regulating screw is adjusted to the deepest screw position corresponding to the maximum oil pressure of inner cavity;First standard tension and second standard tension are determined according to the deepest screw position and preset standard contrast curve;Hydraulic expansion sleeve coupling is injected by oil injection channel;The inner diameter tension and outer diameter tension of hydraulic expansion sleeve coupling are measured and recorded in real time during oil injection process;When inner diameter tension is equal to first standard tension and outer diameter tension is equal to second standard tension, oil injection is completed.The hydraulic expansion sleeve coupling that is completed by the above method guarantees that the required maximum torque can be provided, meets the maximum torque demand, without skid test, greatly reduces the labor cost, and also does not make product appear test wear condition, reduces the scrappage rate of product.

The application discloses a torque control system and method of a hybrid engine. The torque control system comprises a data acquisition module for acquiring the hybrid engine speed, the maximum torque value allowed by the hybrid engine, the engine coolant temperature, the fault diagnosis state of the thermal management controller, the actual opening degree of the thermal management controller, the fault diagnosis state of the electronic water pump and the actual speed of the electronic water pump in real time, and transmitting them to a calculation execution module; the calculation execution module is used for determining the temperature limit torque value of the hybrid engine, the opening degree limit torque value of the hybrid engine and the speed limit torque value of the hybrid engine, and transmitting them to a torque output module; the torque output module is used for outputting the overall limit torque value to the hybrid engine according to the temperature limit torque value, the opening degree limit torque value and the speed limit torque value, and can comprehensively consider different fault diagnosis states to limit the output torque of the hybrid engine, thereby greatly improving the service life of the hybrid engine.

This utility model relates to the field of mechanical transmission system technology, specifically to a planetary gear carrier for a bulldozer, comprising planetary gears and a carrier assembly. The carrier assembly includes a shaft hole mounting portion, multiple planetary gear shaft mounting portions, and multiple transition portions. The shaft hole mounting portion has an input shaft hole at its center, and the planetary gear shaft mounting portions have planetary gear shaft mounting holes. Multiple planetary gear shaft mounting portions surround the shaft hole mounting portion, and a transition portion is fixedly connected between any two adjacent planetary gear shaft mounting portions. The shaft hole mounting portion, planetary gear shaft mounting portions, and transition portions are integrally formed. The planetary gears are mounted on the inner side of the planetary gear shaft mounting portions. The thickness of the shaft hole mounting portion is 8-12 mm, and the thickness of the planetary gear shaft mounting portions is 15-20 mm. By using different thicknesses in different areas to form the carrier assembly, the maximum equivalent stress of the carrier assembly can be reduced, and the maximum torque that the carrier assembly can withstand can be increased.

The embodiment of the application provides a kind of method, device and processor for determining the maximum torque of electric sanitation vehicle.The method comprises the following steps: collecting the actual speed of motor in real time;Determine the peak torque and rated torque according to the actual speed of motor;Select any one time as target time, and the previous time of target time as first time;Determine the maximum torque of electric sanitation vehicle at first time;According to the actual speed of motor at first time, determine the attenuation duration of motor speed from first time to target time;Control the torque of electric sanitation vehicle attenuates from the maximum torque of first time to the rated torque corresponding to target time within attenuation duration;The rated torque corresponding to target time is determined as the maximum torque of electric sanitation vehicle at target time.Using the above technical solution, the attenuation torque of electric sanitation vehicle can be controlled within the attenuation duration, which avoids the power shortage of vehicle caused by sudden attenuation of torque, and provides a good driving experience for the driver.

The application provides an energy consumption optimization control method and device of an agricultural plant protection motor, comprising: collecting agricultural plant protection motor operation parameters, plant protection operation scene parameters and load characteristic data in real time; identifying a dynamic load rate and equivalent wind resistance loss in real time through an extended Kalman filtering algorithm; adaptively adjusting equivalent magnetic resistance of a rotor magnetic circuit according to an identification result, changing air gap magnetic flux distribution through gap change of a deformable magnetic barrier structure of the motor; correcting a maximum torque current ratio control strategy based on the dynamic load rate and equivalent wind resistance loss, and dynamically distributing motor direct axis demagnetizing current and quadrature axis driving current, so that the sum of copper loss and iron loss of the motor under current working conditions is minimum. In the application, the coupling relationship between the dynamic load rate and the equivalent wind resistance loss is accurately identified, the energy efficiency of the plant protection motor is improved, and operation endurance is prolonged.

This invention relates to the field of permanent magnet synchronous motor vector control technology, specifically to a rapid calibration method for permanent magnet synchronous motors in new energy vehicles. It includes a calibration table for the maximum torque-to-current ratio; a calibration table for the motor flux linkage; a calibration table for the motor inductance; and obtaining the target torque T. req And by consulting the calibrated lookup tables, the required d-axis current i to be output is obtained. dref and q-axis requested current i qref This method does not require the motor to operate at high speeds, reducing risks and minimizing the need for high-speed testing benches. It also offers high calibration efficiency and high control precision.