377 results about "Maximum torque" patented technology

The invention discloses a weight coefficient-free model prediction control system and method for a permanent magnet synchronous motor, and particularly belongs to the field of permanent magnet synchronous motor control. The control system comprises a direct current voltage source, a three-phase converter, a permanent magnet synchronous motor, a rotating speed outer ring PI control module, an MTPA flux linkage calculation module and a model prediction control module. The control method comprises the following implementation steps: firstly, establishing a torque and flux linkage prediction model of the permanent magnet synchronous motor; then, a reference torque amplitude value and a reference flux linkage amplitude value are obtained through a rotating speed outer ring PI controller and a maximum torque per ampere (MTPA) calculation module respectively; secondly, constructing an independent torque cost function and a flux linkage cost function according to the torque error and the flux linkage error, and forming a cascade form; evaluating the switching states by using a cost function, selecting two vectors from the eight switching states of the converter by using the independent cost function of the torque (or flux linkage), and selecting an optimal vector from the two vectors by using the independent cost function of the flux linkage (or torque); and finally, the execution sequence of the torque and flux linkage cost function is alternated in each subsequent period. Compared with the prior art, the method avoids complex weight coefficient design through a cost function cascading mode, alternates the execution sequence of the cost functions in each period, dynamically balances the weights of the two control targets, and reduces the number of calculation times.

The invention discloses a motor torque calibration method, device and equipment for an electric heavy truck and a storage medium, and the method comprises the steps: obtaining a current motor rotating speed of the electric heavy truck, carrying out the segmented calibration of the motor rotating speed, and obtaining a rotating speed segmented calibration result; determining a corresponding torque correction amount according to a rotation speed segmented calibration result, calibrating a maximum torque current ratio control MTPA curve under the target rotation speed according to the torque correction amount and the voltage grade compensation amount, and obtaining calibration data; according to the method, the calibration data is subjected to Excel inspection, the target calibration data passing the inspection is subjected to calibration precision verification, and the final calibration data is output after the verification is passed, so that the motor calibration period can be remarkably shortened, the full-speed-domain torque precision is improved, the manual intervention and the standardization process are reduced, and the research and development cost and the quality risk are greatly reduced; rapid and high-precision calibration of the motor torque in a full-speed-domain and multi-voltage scene is realized, and the speed and efficiency of motor torque calibration of the electric heavy truck are improved.

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 steering fault-tolerant control strategy suitable for a three-axis modular distributed electric drive heavy-duty vehicle. Determining a six-wheel rotation angle of the health system according to the steering multi-model set, and establishing a model; the input quantity is the front wheel turning angle of the three shafts, and the vehicle yaw velocity is solved by combining the longitudinal velocity of the vehicle; parsing driver pedal input as a target longitudinal speed; setting total driving force and total yawing moment control quantity, and obtaining total driving force and total yawing moment by using a model predictive control algorithm; according to the relation between the longitudinal force and the slip rate and between the lateral force and the slip rate of the tire, the lateral force borne by the fault wheel is minimized, the rotating speed and the driving torque of the fault wheel are calculated, and a cost function is set with the tracking error of the total driving force and the total yawing torque and the attachment rate of the healthy wheel as soft constraints; the maximum torque and the minimum torque which can be output by the hub motor serve as hard constraints, and a multi-objective optimization problem is established and solved; and finally issuing the control quantity. According to the method, steering fault-tolerant control of the three-axle six-wheel vehicle is realized.

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 vehicle control method and device based on a permanent magnet motor. The method comprises the steps of determining a torque output value according to a current rotating speed instruction and an actual rotating speed of a motor based on a rotating speed control strategy in a current rotating speed control period; determining the current required torque according to the torque output value, the current torque limit value and the maximum torque of the motor; determining the current state of the motor at least according to the symbol of the actual rotating speed and the symbol of the current required torque; wherein the current state comprises an electric state or a braking state; the symbols comprise a positive sign and a negative sign; determining a first target current and a second target current according to a first preset corresponding relation corresponding to the current state, the current demand torque, the actual rotating speed and the symbol of the current demand torque; when the current states of the motor are different, the corresponding first preset corresponding relations are different; and controlling the voltage output to the motor according to the first target current and the second target current. According to the technical scheme, the accuracy of vehicle control is improved.

The invention relates to a permanent magnet synchronous motor full-working-condition design method considering driver constraints, and belongs to the technical field of permanent magnet synchronous motor design, and the method comprises the following steps: building a mathematical model of a permanent magnet synchronous motor; calculating the electromagnetic relation of the motor in the constant torque maximum torque / current control mode; calculating the electromagnetic relation of the motor under the constant-power weak magnetic control; and according to the model and the electromagnetic relationship, carrying out full-condition design on the motor. Based on the mathematical model and the control mode of the permanent magnet synchronous motor, by analyzing the influence of the direct current bus voltage and the inverter circuit output current on the maximum rotating speed, the maximum torque and the current density of the motor, the constraint condition of the driver performance on the motor design can be determined. According to the method, whether the electromagnetic performance of the design scheme reaches the standard or not can be calculated and analyzed more quickly, and the design efficiency is improved.

A feedforward control method for an electrified powertrain including a torque transfer device arranged between an electric motor and a transmission includes monitoring a set of operating parameters of the electrified powertrain, determining a desired input speed for the torque transfer device based on the set of operating parameters, determining a desired input torque for the torque transfer device based on a characteristics model or map of the torque transfer device and the desired input speed, performing an observer-based determination of a final feedforward torque for the torque transfer device based on the desired input speed, the desired input torque, a filtered actuator achieved torque for the electric motor, and minimum and maximum torque limits for the transmission, and controlling the electric motor based on the final feedforward torque for the torque transfer device.

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.

A method of operating a hybrid electric powertrain (HEP) may include determining, based on a HEP torque demand and a maximum torque limit for a gas turbine engine having a mechanical output coupled to a power shaft of the HEP, a target torque for the gas turbine engine. The method may also include controlling the gas turbine engine to operate according to a target speed or the target torque. The method may also include, while operating the gas turbine engine according to the target speed or the target torque, determining, based on the HEP torque demand and the target torque, a total torque compensation demand for an electric machine having a mechanical output controllably couplable to the power shaft of the HEP, and operating the electric machine according to the total torque compensation demand.

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 invention discloses an oil temperature control method and device for a water-cooling electric drive system. The method comprises the steps that the rotating speed and torque of a vehicle motor at the current collection moment and historical accumulated heat in reducer oil at the previous collection moment are obtained; if the rotating speed is larger than a preset rotating speed threshold value, table look-up calculation is conducted in a preset target relation table according to the rotating speed and the torque, and the duration corresponding to the rotating speed is determined; according to the duration and the historical accumulated heat at the previous collection moment, target accumulated heat in the reducer oil at the current collection moment is determined; and if the target accumulated heat is greater than the heat threshold value, performing limit value updating on the torque according to the rotating speed and the target relation table to obtain the updated torque for motor adjustment and operation. Therefore, an accurate pre-judgment mechanism of the oil temperature risk is formed by collecting motor parameters in real time, looking up a table to judge the risk and calculating the accumulated heat; and when the heat exceeds the threshold value, the maximum torque output meeting the duration requirement is screened, and balance of safe temperature control and power retention is achieved.

An electrified powertrain that generates and transfers drive torque to a driveline of an electrified vehicle includes an electric motor, a driver interface and a controller. The driver interface has an accelerator pedal and a human machine interface that communicates a signal indicative of activating a torque-boost mode. The controller controls torque delivery based on an accelerator pedal map, the accelerator pedal map having (i) a first torque trace providing a maximum torque output based on a position of the accelerator pedal, and (ii) a second torque trace indicative of the torque-boost mode and providing a maximum torque-boost output based on the position of the accelerator pedal, the maximum torque-boost output being greater than the maximum torque output, wherein the controller commands the electric motor to operate at the maximum torque-boost output based on a driver activation input and a determination that the electrified vehicle is in motion.

The invention discloses a track fastener bolt automatic tightening method and system based on looseness detection, and the method comprises the steps: setting a fastener bolt looseness degree detection model, and calculating the looseness degree of a fastener bolt; a required torque estimation model is set, and the torque required for tightening the fastener bolt is calculated according to the looseness degree of the fastener bolt and the standard torque when the fastener bolt is not loosened; a servo motor rotation angle estimation model is set, and the rotation angle of the servo motor is calculated according to the initial angle of the servo motor, the torque needed for tightening the fastener bolt in the previous control period, the maximum torque capable of being provided by the motor and the torque needed for tightening the fastener bolt; and setting an automatic tightening control signal adjustment model, calculating a control signal value of the servo motor, and when the control signal value of the servo motor exceeds a preset threshold value, sending a signal to the servo motor, so that the servo motor performs rotation control on the fastener bolt according to the rotation angle until the control signal value of the servo motor is smaller than the preset threshold value.

The invention relates to the technical field of soil sampling, and discloses an agricultural soil detecting and sampling device which comprises a torsion adjusting mechanism and a separated linkage mechanism, a rotating shell which is fixedly mounted at the bottom end of the central rotating shaft and is in a hollow state, an upper rotating disc which is positioned in the rotating shell and can rotate along with the rotating shell, a lower rotating disc which is positioned under the upper rotating disc and can drive the sampling screw rod to rotate, and a plurality of balls which enable the lower rotating disc to rotate along with the upper rotating disc are arranged in the rotating shell. According to the agricultural soil detection sampling device, once the torsional resistance of the spiral blade in the sampling screw rod is greater than the deformation resistance strength of the spiral blade, the resistance to the spiral blade in the sampling screw rod is not further increased on the premise of not influencing the basic rotation of the driving motor, so that an effective protection measure is formed for the sampling screw rod; according to the device, the maximum torsion during linkage can be adjusted according to actual needs, so that the applicability of equipment is improved.

The purpose of the present invention is to provide: a rotor for a rotary electric machine, the rotor being capable of reducing torque ripple while suppressing a decrease in maximum torque; and a rotary electric machine. This rotor 3 comprises a rotor core 31 having: magnets; magnet insertion holes into which the magnets are inserted; and flux barriers provided around the magnets. The magnets include: first magnets 32; and second magnets 33 that are arranged in roughly a V-shape inwardly of the first magnets 32 in the radial direction. The flux barriers include: first flux barriers 34a that face the side surfaces 33a of the second magnets 33 at the outer sides thereof in the radial direction; and second flux barriers 34b that are arranged outwardly of the first flux barriers 34a in the radial direction. Each second flux barrier 34b comprises: a first side 34b1 which follows an outer peripheral surface tangent line TL of the rotor core 31; and a second side 34b2 which is located inwardly of the first side 34b1 in the radial direction and of which at least a part is formed along a side 34a1 of the first flux barrier 34a at the outer side thereof in the radial direction.

The invention discloses a synchronous permanent magnet coupling coupler capable of adjusting torque on line, comprising an outer shaft sleeve used for connecting a load shaft; inner shaft sleeves are arranged at one axial end of the outer shaft sleeve at intervals and used for being connected with a driving shaft. A first carrier is coaxially arranged at the end, facing the inner shaft sleeve in the axial direction, of the outer shaft sleeve. An adjusting carrier is arranged on the inner circumferential face of the first carrier in a sliding mode and driven by an adjusting mechanism to move in the axial direction. Outer rotor magnetic steel is arranged on the inner circumferential surface of the adjusting carrier; inner rotor magnetic steel is arranged on the peripheral face of the part, extending into the first carrier, of the inner shaft sleeve, the inner rotor magnetic steel and the outer rotor magnetic steel are correspondingly arranged, and an air gap is formed between the inner rotor magnetic steel and the outer rotor magnetic steel in the radial direction. The maximum torque value can be flexibly adjusted on line, the requirement for entering a protection state in time under different working conditions is met, and the application range is wide.

The invention provides an energy management method, electronic equipment and a vehicle, the method is applied to the technical field of vehicle energy management, and the method comprises the steps that in a direct drive mode, the maximum engine torque is determined according to the battery electric quantity difference value and the engine rotating speed; m engine target discrete torques are obtained based on the maximum engine torque, the engine rotating speed and the discrete engine demand torque; m discrete parameter sets are determined according to the M engine target discrete torques and the engine rotating speed; and target working parameters of the engine are determined. The maximum torque limit value of the engine is determined by combining the battery capacity, and balance between the output torque and the capacity of the engine is guaranteed. In addition, the basic demand torque is determined firstly, and then a small amount of local discretization is performed to obtain the optimal parameter of the engine, so that the optimization workload is reduced, the optimal parameter is matched with the current vehicle working condition, the optimization accuracy is ensured, the fuel economy of the vehicle is improved, the fuel loss of the engine is reduced, and the energy distribution and energy conversion efficiency of the vehicle are optimized.

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.

The utility model relates to the technical field of squirrel-cage synchronous motors, in particular to a rotor punching sheet and a stator punching sheet on a squirrel-cage synchronous motor of a refrigerator compressor, which comprise 24 stator grooves including two special-shaped grooves A and two special-shaped grooves B, two punching sheet yoke parts 1 form a tip structure of the stator punching sheet, and the included angle of the tip end of the rotor groove is set to be 150-165 degrees. According to the technical scheme of the utility model, one side of the stator punching sheet structure adopts the traditional long-edge design, the other side adopts the pointed-end structure, and four of the 24 slots adopt the special-shaped slot design, so that the size rationality of the yoke part of the motor is ensured, the rationality of the magnetic circuit of the motor in design is ensured, the utilization rate of silicon steel of the motor is improved, and the consumption of silicon steel is reduced; the groove-shaped tooth tip parts of the rotor punching sheet are distributed at 150-165 degrees, and on the premise that the tooth width and the groove-shaped length of the rotor are not changed, the cast aluminum volume of the rotor is improved, so that the impedance of the rotor is improved, the magnetic flux density of the rotor is increased, the maximum torque of the motor is improved, and the starting performance of the compressor is improved.

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 utility model discloses a filter element replacing mechanism for a water purification vehicle, and particularly relates to the technical field of filter element replacing devices. The filter element replacing mechanism comprises a dismounting and mounting mechanism, a conveying mechanism is fixedly mounted on one side of the dismounting and mounting mechanism, the dismounting and mounting mechanism comprises a mounting shell, a motor is fixedly mounted in the mounting shell, one side of a gear is connected with a fluted disc in a meshed mode, and the fluted disc is connected with the conveying mechanism. And a plurality of transmission teeth are fixedly mounted at the bottom of the fluted disc. According to the filter element dismounting and mounting mechanism for the water purification vehicle, the arranged motor drives the gear to rotate, then the gear drives the fluted disc to rotate, a filter element is mounted and dismounted, and in the process, when the torque of the dismounting disc during rotation is larger than the elastic force of the spring to the locking ball, the locking ball moves towards the side away from the fluted disc; and the adjusting sleeve is rotated to drive the adjusting disc to move in the mounting shell, so that the extrusion degree of the spring to the locking ball is changed, and the purpose of changing the maximum rotating torque of the dismounting mechanism is achieved.

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.

The invention discloses a stator assembly, a motor and a compressor, the stator assembly comprises a stator punching sheet, a main winding and an auxiliary winding, the stator punching sheet is provided with winding grooves, a plurality of winding grooves form four groove groups, the four groove groups are located in four quadrants, and the winding grooves are arranged in the winding grooves. Each groove group comprises two first grooves, two second grooves, a third groove and a fourth groove, and the slotting sizes of the first grooves, the second grooves, the third groove and the fourth groove are sequentially reduced; the main winding is arranged in the first groove, the second groove and the third groove; the secondary windings are arranged in the second groove, the third groove and the fourth groove, and the secondary windings in the second groove and the third groove are located on the radial inner sides of the primary windings in the second groove and the third groove. Therefore, by optimizing the groove type of the winding groove and the layout of the main winding and the auxiliary winding, the starting torque of the motor can be improved and the starting requirement can be met under the condition that the efficiency and the maximum torque are ensured, and then a starter can be omitted, so that the cost is saved, the size is optimized and the operation reliability is improved.

The present application relates to the field of semiconductors, and relates to a torque calibration method and a semiconductor equipment material storage unit. The torque calibration method includes: calculating the maximum torque of the flip component: T N =P·L, where P is the gravity of the flip assembly and L is the maximum lever arm length from the center of gravity of the flip assembly to the rotation center of the driven wheel, which is recorded as the calibration position; determine the working torque: T, where T ≥ n·T N , n is a safety factor greater than 1; calibrate the torque of the flip assembly: gradually tighten the driven wheel, and when the flip assembly is in the calibrated position and the driven wheel does not disengage, record the applied pressure value: F = F i , the torque T of the flip assembly i =(F b +P)·L, where i is the number of calibrations, F b The force acting on the center of gravity of the flip assembly in the direction of gravity solves the problem that existing vertical opening and closing devices have no anti-pinch function or sensor-based anti-pinch function, which can easily damage precision machinery and materials and cause false detection.

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.