136 results about "Maximum torque" patented technology

The invention belongs to the field of motor control, and relates to a permanent magnet synchronous motor MTPA control method based on end-to-end reinforcement learning, in a motor control system, motor current and rotating speed collected in real time are constructed into a state vector, a trained intelligent agent is input for reasoning, and control voltage is output as an action vector. Finally, a voltage instruction is correspondingly generated to drive a motor; the network structure of the intelligent agent is constructed based on a TD3 algorithm, training data of the intelligent agent comprises random motor physical parameters and dynamic motor working condition rotating speed, iterative training of the intelligent agent is based on a dynamic reward function, and the intelligent agent is guided to converge automatically through the dynamic reward function. According to the method, a control strategy of directly mapping the rotating speed and the current state of the motor to the optimal voltage instruction can be obtained, so that rotating speed tracking is met, the maximum torque-current ratio working point is spontaneously converged, and the method has adaptive compensation capability for parameter nonlinear drift in motor operation.

The invention discloses a hybrid power parameter determination method and device and electronic equipment, and relates to the field of vehicle design, and the method comprises the steps: determining the engine displacement of which the average operation power of an engine is consistent with a target fuel consumption area according to the average operation power, the torque standard deviation, the maximum torque fluctuation value and the fuel type in a vehicle road spectrum; according to the method, the determined engine can work in the interval with higher efficiency, the fuel economy is improved while the conventional power requirement is met, and the engine cost is reduced. The rated power of the motor is further determined according to the maximum operation power in the vehicle road spectrum and the target engine external power, and the target engine external power is the external power corresponding to the target vehicle speed or the target rotating speed under the maximum operation power. And determining the battery capacity according to the rated power of the motor, the climbing duration in the vehicle road spectrum and the battery adjustment coefficient. And on the basis of the engine, motor driving is matched to increase the endurance mileage, and the economy of the whole vehicle is improved.

The invention discloses a performance analysis method for a topological structure of a multi-topology axial flux permanent magnet motor based on electromagnetic-thermal coupling, and the method comprises the steps: firstly building three-dimensional electromagnetic finite element models of four typical axial flux permanent magnet motors, and calculating electromagnetic loss including iron core loss, copper loss and permanent magnet eddy current loss; importing the loss data into a three-dimensional fluid-thermal coupling model, and simulating the temperature rise of the motor under a natural cooling condition; the performance of the motor is subjected to double constraints of winding insulation and irreversible demagnetization temperature of a permanent magnet, so that the maximum current density of safe steady-state operation of the motor is determined and identified by adopting an iterative electromagnetic-thermal coupling analysis method, and the maximum torque density of each topological structure is evaluated under thermal constraints. The electromagnetic performance and the thermal constraint can be coupled, so that the optimal performance achieved by different axial magnetic flux permanent magnet motor topological structures can be compared, and the problem of inaccurate performance evaluation caused by neglect of the thermal constraint in the existing motor design is solved.

The invention relates to a stabilization self-adaptive control method and device based on double gyroscopes, and the self-adaptive control method comprises the steps: constructing a real-time updated'sea wave-ship-double gyroscope 'coupling dynamic model, and introducing the online identification of ship rolling parameters; physical limit, damping, maximum torque and other constraints of the double-gyroscope executing mechanism are explicitly written into a control law; the two gyroscopes are symmetrically arranged and opposite in precession direction, so that yawing torques are mutually counteracted and rolling torques are superposed, and the stabilization efficiency is improved; adaptively selecting PID according to the rolling amplitude, the sea condition uncertainty and the working state of the actuator, and adaptively switching the fuzzy adaptive PID and the model prediction control strategy; calculating a control instruction based on the selected strategy and the updating model, and performing physical constraint processing such as torque saturation and angle amplitude limiting; and outputting a safety instruction to drive the gyroscope to generate stabilization torque. The method can adapt to different working conditions, and the efficient and stable active stabilization performance and stabilization effect are kept under the multiple working conditions.

The invention discloses a permanent magnet synchronous motor wide speed range model prediction control method and system based on a mean value reduction optimization algorithm, and belongs to the technical field of motor control. According to the method, a discrete mathematical model of the permanent magnet synchronous motor is established under a d-q rotating coordinate system, a q-axis current reference value is generated by an outer ring through a speed PI regulator, and a d-axis current reference value is calculated in combination with a maximum torque per ampere (MTPA) principle and a weak magnetic region voltage constraint; finite control set model prediction control is adopted in an inner ring, enumeration prediction is conducted on candidate voltage vectors of the three-phase voltage source type inverter, a cost function containing a d-axis current error, a q-axis current error and an electromagnetic torque error is constructed, an optimal voltage vector is selected, and a three-phase PWM signal is generated through space vector pulse width modulation to drive a motor. The system is provided with a mean value reduction optimization module, joint optimization is carried out on speed outer ring PI parameters and cost function weight coefficients in the off-line stage, the parameters are stored in a lookup table, and automatic setting of control parameters is achieved. The permanent magnet synchronous motor can improve the dynamic response performance of the rotating speed and the current in the base speed area and the weak magnetic area, reduce the total harmonic distortion of the stator current, improve the voltage utilization rate and the overall operation efficiency of the permanent magnet synchronous motor, and is suitable for occasions such as electric vehicle driving and high-performance servo systems.

The invention provides a torque distribution method, an electric drive system, an electric vehicle, equipment and a medium. The method comprises the following steps: predicting temperature data of an inner stator of each electric drive in a future preset duration according to a current temperature parameter of each electric drive and a stator temperature prediction model corresponding to a current torque; determining a torque derating coefficient corresponding to each electric drive according to a maximum torque derating strategy corresponding to the current driving mode and the current stator temperature corresponding to each electric drive; the temperature data and the torque derating coefficient of the inner stator of each electric drive in the future preset duration are uploaded to a vehicle control unit, so that the vehicle control unit carries out torque distribution on each electric drive with the shortest duration for achieving the consistent stator temperature of the front drive and the rear drive as the target; the torque derating coefficient is used for limiting the maximum torque distributed to the corresponding electric drive by the vehicle control unit. By means of the method, the electric drive thermal state and torque distribution can be considered, single electric drive passive derating is avoided, the power potential is fully utilized, the torque sudden change pause feeling is eliminated, and the driving experience consistency is improved.

The alternating-current synchronous motor comprises a stator shell and a rotor, the stator shell is arranged on the ground, the rotor is arranged in the stator shell through an end cover and an insulating bearing, the rotor comprises a rotating shaft and a rotor iron core, the rotor iron core is arranged on the rotating shaft, and a tooth groove set is formed in the rotor iron core in a concave mode. The tooth groove group is composed of a plurality of adjacent tooth grooves, and the windings are arranged in the tooth grooves. The motor has the advantages that the relative positions of the stator and the rotor tooth grooves are collected through the rotor position sensor, the current of the three-phase alternating current and rated torque input are collected through the current sensor, the magnitude of the current of the three-phase synchronous alternating current is controlled, the torque of the motor is controlled, and winding arrangement is optimized, so that the reliability of the motor is improved. In the working process, the magnetic potential direction of the rotor is perpendicular to the magnetic potential direction of the stator at any position, then the maximum torque under the current is output, and meanwhile, the stator permanent magnet cannot be demagnetized due to the change of the magnetic field of the rotor.

The invention relates to the technical field of vehicle control, in particular to an engine power compensation control method, electronic equipment and a vehicle. The method comprises the steps that current environment data of the vehicle and engine running state data are obtained; inputting the environment data into an environment prediction model, and extracting current environment features; the current environment data and the engine operation state data are jointly input into an engine torque prediction model, and the maximum engine torque value in the current environment is obtained; inputting the current environment characteristics and the maximum torque value into a torque compensation control instruction generation model to generate a corresponding torque compensation control instruction; and finally, performing power compensation control on the engine according to the instruction. According to the method, a cooperative control framework integrating environment prediction, torque estimation and intelligent decision making is constructed, dynamic precise compensation of engine dynamic response in a complex environment is achieved, and the torque output precision and the self-adaptive control capacity of the vehicle under special working conditions are effectively improved.

A kind of maximum torque current ratio-based full-order flux linkage observer virtual voltage signal generation method belongs to motor position sensorless control technical field.The present application aims at the problem that the amplitude of existing virtual voltage signal injection based on full-order flux linkage observer is extremely difficult to adjust,which cannot realize stable operation under different load conditions at zero speed.The present application includes the following steps: constructing full-order flux linkage observer based on the voltage equation of built-in permanent magnet synchronous motor under estimated rotating shaft system;linearizing decoupling the flux linkage error dynamic equation of full-order flux linkage observer at local point to obtain the mathematical expression relationship between position estimation error of full-order flux linkage observer and virtual voltage signal;then establishing the relationship between position estimation error and torque of built-in permanent magnet synchronous motor;setting position estimation error as maximum torque current ratio angle,calculating to obtain the injection coefficient of virtual voltage signal;generating virtual voltage signal based on the injection coefficient.The present application can realize parameter tuning of motor position observer.

An electromechanical brake cylinder (2) for actuating a wheel brake (1), in particular a wheel brake (1) of a rail vehicle, comprises: an electric motor (3) with a rotor (5), a spindle nut (7), a torque transmission device provided between the rotor (5) and the spindle nut (7), and a threaded spindle (8). The spindle nut (7) and the spindle (8) are configured to convert a rotary movement of the spindle nut (7) into an axial movement of the spindle (8), wherein the axial movement of the spindle (8) can be converted into a movement of a brake pad (17) of the wheel brake (1) relative to a braking element of the wheel brake (1), and wherein the torque transmission device is configured to transmit a torque less than or equal to a maximum predetermined torque value between the rotor (5) and the spindle nut (7).

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 relates to a compact active artificial knee joint with a torque adjusting device, which comprises a knee joint module, a receiving cavity connecting block, a lower leg connecting piece and a torque adjusting device, wherein the torque adjusting device comprises a spiral spring, a bent spring groove and the like, the knee joint module comprises a knee joint shell, a knee joint shaft center, a knee joint stator sleeve end cover and the like, one end of the spring is fixed at the upper receiving cavity connecting lug through an opening on the motor stator sleeve end cover, and the other end is fixed in the bent spring groove at the position of the motor stator sleeve end cover and the knee joint shaft center. The torque adjusting device can realize torque assistance and adjustment according to the angle size and direction of the limb rotation; meanwhile, the driving peak torque of the motor can be reduced, the size and the maximum torque of the driving motor are smaller due to the fact that the artificial limb needs to be easily worn, energy consumption and space are saved.

The utility model relates to the technical field of control switches, and provides a change-over switch and an electric tool, and the change-over switch comprises a switch body, a first operation part, a triggering part, an induction part and a regulator. The first operating piece is movably connected to the switch body; the triggering piece is arranged in the first operating piece and can synchronously move along with the first operating piece; the sensing piece can be triggered and sensed by the triggering piece and generates a corresponding state signal; the regulator is arranged outside the switch body, is electrically connected with the induction piece, and is used for regulating equipment electrically connected with the regulator according to the state signal; the sensing piece can generate a first state signal and a second state signal; under the first state signal, the regulator outputs a forward rotation instruction of the motor; and under the second state signal, the regulator outputs an instruction of motor reverse rotation and maximum torque. Both of the two can solve the problem that the gear of the electric tool is still kept in the previous state after forward and reverse rotation switching.

The invention is suitable for the technical field of intelligent electric meters, and relates to a sectional type soft start method of an external circuit breaker of an electric energy meter, a medium and a terminal. Determining the maximum torque force of the required motor, and selecting a proper motor; determining the longest contact time of the rotor commutation sheet and the electric brush; the first starting stage comprises the steps of confirming values of Ton and Toff, calculating the number of starting pulses, and pre-starting; in the second starting stage, a fixed pulse mode is adopted, the rotating speed is increased in the mode of increasing the duty ratio, and on the basis of the Ton time, the Ton opening time is increased; entering a third starting stage: increasing the duty ratio of the starting pulse again; after the three stages are completed, the duty ratio is switched to be 1, and full-speed operation is achieved. The method is convenient to operate and low in cost, the overload protection mode of the power supply is skipped while the starting current of the motor is reduced, and the power supply with low power supply capacity can bear large current impact when the motor is started.

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.

Disclosed are a control method and a control device for a permanent magnet motor, wherein the control method comprises: determining active current reference initial values and reactive current reference initial values of the permanent magnet motor in a current control period; searching for optimal active current reference values and reactive current reference values in the current control period based on the active current reference initial values and the reactive current reference initial values, with the maximum torque current ratio in the current control period as the target; and controlling the permanent magnet motor to operate based on the optimal active current reference values and the reactive current reference values; wherein the torque current ratio is calculated based on a torque instruction value received by the permanent magnet motor from a fan main controller and an output current value of the permanent magnet motor. The technical solution of the disclosure can avoid the influence of parameter changes of the permanent magnet motor on the maximum torque current ratio control, thereby realizing accurate optimal torque current ratio control.

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.

To provide a door control device of an elevator capable of achieving appropriate door control in consideration of door characteristics while suppressing a calculation load.SOLUTION: A voltage conversion unit which supplies a voltage to the door motor, a current detection unit which detects a current value of an output voltage of the voltage conversion unit, a door speed calculation unit which calculates a door speed at the time of opening and closing the door on the basis of an output of a motor position sensor of the door motor, and an acceleration command unit which generates an acceleration command at the time of opening and closing the door on the basis of the current value detected by the current detection unit, wherein the acceleration command unit includes: a torque calculation unit which calculates a motor torque on the basis of the current value detected by the current detection unit; a running resistance calculation unit which calculates a running resistance of the door on the basis of the motor torque calculated in a stationary period of the door speed; an acceleration torque calculation unit which calculates an acceleration torque of the door on the basis of the motor torque calculated in an acceleration period of the door speed; and an acceleration calculation unit which generates an acceleration command on the basis of the running resistance, the acceleration torque, and the maximum motor torque of the door motor.SELECTED DRAWING: Figure 5

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.

Motor module. A motor module includes: a motor; a drive unit; a control unit; a memory; and a communication unit. The control unit performs the following operations: receives parameter information specific to a vehicle-mounted device from a management module by the communication unit and stores the parameter information in the memory; in a case where the parameter information is stored in the memory, drives the motor by the drive unit based on an operation signal for operating the vehicle-mounted device input from the outside and the parameter information to operate the vehicle-mounted device so that the motor outputs a predetermined torque; in a case where the parameter information is not stored in the memory, drives the motor by the drive unit based on the operation signal for a certain period of time and then stops the motor to fine tune the vehicle-mounted device so that the motor outputs a maximum torque.

The invention relates to the technical field of automobile safety control, and discloses a distributed electric automobile traction control method and system and a program product, and the method comprises the following steps: after a traction control system is activated, judging the type of a road surface where the automobile is located; judging whether the vehicle responds to the target torque reduction value sent by the traction force control system according to the type of the road surface of the vehicle; if the road surface is a non-separated road surface, responding; if the pavement type is a separated pavement, entering the next step; judging whether the vehicle has an instability trend or not; if so, entering the next step; if not, the low attachment side responds to the target torque reduction value sent by the traction force control system, and the high attachment side responds to the torque required by the driver; and determining the bearable maximum torque difference of the vehicle, and adjusting the high attachment side torque of the vehicle according to the bearable maximum torque difference of the vehicle. The problem that in the prior art, collaborative optimization of the stability and acceleration of the vehicle is difficult to achieve when the vehicle tends to be unstable is solved.

One aspect of the present disclosure provides a boom floating control system for a construction machine including a boom, an arm, and an attachment, the boom floating control system comprising: an electromechanical actuator connected to the boom to raise the boom as the electromechanical actuator is extended and lower the boom as the electromechanical actuator is retracted, the electromechanical actuator including an electric motor configured to convert electric energy into a rotational motion and a linear actuator configured to convert the rotational motion of the electric motor into a linear motion; and a controller configured to, when a boom floating function is activated, perform control such that, with respect to a first external force acting in a direction in which the linear actuator extends, a maximum torque of the electric motor generable in a direction resisting the first external force is limited.

The application discloses a kind of global control method, device and permanent magnet synchronous motor of permanent magnet synchronous motor, by calibration, the three-dimensional current pulse spectrum of non-field weakening area is obtained, and the three-dimensional current pulse spectrum of field weakening area is also obtained by calculation, wherein, three-dimensional current pulse spectrum is voltage-speed-torque three-dimensional current pulse spectrum, in the first working condition, according to the three-dimensional current pulse spectrum of non-field weakening area, maximum torque current ratio control strategy is used, in the second working condition, according to the three-dimensional current pulse spectrum of field weakening area, maximum torque voltage ratio control strategy is used, on the one hand, non-field weakening area uses the method of calibration to obtain three-dimensional current pulse spectrum, field weakening area obtains three-dimensional current pulse spectrum by calculation, while reducing calibration time, reduce calibration cost, can make the current MAP more accurate, on the other hand, different control strategies are used for different working conditions, reduce the mutual coupling influence of field weakening ring and current ring, greatly improve the reliability and stability of field weakening control.

The application discloses a kind of injection molding machine mechanical hand collision detection method, it utilizes acquisition module to collect the data of each axis servo motor and carries out filtering to data, utilizes calibration module according to filtered data when first mode of full-automatic operation determines the motion state of each axis and calibrates the maximum torque value and minimum torque value under this motion state, utilizes calibration module to calibrate the speed time delay between the feedback speed and command speed of each axis simultaneously, utilizes collision detection module according to the command speed and speed time delay of each axis to predict actual speed and actual acceleration when running each mode subsequently determines the motion state of each axis, and according to the motion state of each axis, the maximum torque value and minimum torque value under this motion state, detection sensitivity and the data after filtering, identify whether each axis occurs collision;Advantages are that the collision detection of mechanical hand and external environment can be realized without changing the structure of mechanical hand and without increasing the manufacturing cost of mechanical hand, and detection precision is high.

Drive train (1) for a motor vehicle, comprising at least one internal combustion engine (2) having an output shaft (5) for providing torques for driving the motor vehicle and a full-load line, by means of which the motor vehicle can be driven via the output shaft (5), and comprising at least one electric machine (10) having an electrical operating voltage of at most 60 volts and designed to drive the output shaft (5) to assist the internal combustion engine (2) in driving the motor vehicle, characterized in that: - the powertrain has at least one first operating state in which the electric machine assists the internal combustion engine when driving the motor vehicle in at least one lower and / or upper speed range of the internal combustion engine compared to a medium speed range exhibiting the maximum torque of the full-load curve, such that a torque supplied by the output shaft exceeds the full-load curve and falls below the maximum torque of the full-load curve; and - the drive train has at least one second operating state in which the electric machine assists the internal combustion engine in driving the motor vehicle in the medium speed range in such a way that a torque provided by the output shaft exceeds the full load line and the maximum torque of the full load line.

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.

The application provides a kind of pure electric vehicle slope stall operating mode processing method, comprising: obtaining the motor speed and output torque of electric vehicle in slope stall operating mode, if the motor speed is less than the minimum speed threshold of vehicle climbing, the current motor speed is as the first set speed;If the output torque is greater than the maximum torque threshold required by vehicle climbing, it is judged that the vehicle enters the stall state;Obtain motor temperature and IGBT temperature, judge whether the motor temperature and the IGBT temperature reach the first set temperature, if not, control the motor to maintain the current torque output, if yes, control the motor output torque to limit to the first set torque, wherein the first set torque is less than the maximum torque required by climbing, and greater than the minimum torque required by climbing.The application can improve the safety of electric vehicle in slope stall operating mode.