195 results about "Rotor angle" patented technology

The invention relates to the technical field of industrial automation control, and discloses a water-based paint production and processing equipment control system, which comprises the following steps: acquiring stator current and rotor angular velocity, and reconstructing total load torque by using a sliding mode algorithm; extracting an input power low-frequency component to construct a heat dissipation slow manifold, and calculating a thermal drift disturbance component and an orthogonal residual component through orthogonal projection; on the basis of a two-component generation superposition instruction closed-loop adjustment driving mechanism, a double-time-scale orthogonal projection mechanism is utilized, non-structural thermal drift interference is automatically stripped under the condition that heat transfer parameters of equipment do not need to be predicted, the problem of control divergence caused by model parameter mismatch is solved, and decoupling control over the real rheological state of materials is achieved.

The invention relates to a non-inductive FOC open-loop to closed-loop switching method and device for an electronic water pump and a vehicle. The method comprises the steps that a rotor is pre-positioned; starting an open loop I-F; switching condition judgment; estimating the rotor speed based on an observer, calculating a normalization factor, and obtaining a mixed scale factor through cubic polynomial operation; acquiring an open-loop current instruction of a q axis and a closed-loop current instruction output by a closed-loop speed PI regulator; performing weighted synthesis on the two paths of current instructions according to the mixing scale factor to obtain a temporary target current instruction, and applying a change rate limit to obtain a final current instruction output in the current period; the original angle error of the observer estimation angle and the open-loop slope angle is calculated and normalized, the allowable adjustment step length and direction of the round are dynamically determined, and the angle correction amount of the round is generated and superposed to the open-loop slope angle to update the rotor angle reference value; and closed-loop switching is completed. According to the invention, the problems of electromagnetic torque impact and rotating speed fluctuation caused by instruction step change are solved.

The invention discloses an electric power system transient stability state and stability margin evaluation method, device and equipment based on Grapher multitask learning and a medium, and relates to the technical field of electric power, and the method comprises the steps: carrying out the standardization of node features corresponding to a bus and edge features related to a power transmission line and a transformer branch, and obtaining standardized features; determining a dichotomy label based on a power angle difference between the generators after a fault occurs, determining a regression label based on a difference between a generator rotor angle trajectory and an inertia center trajectory, and determining a target Grapher multi-task learning model by using the standardized features, the dichotomy label, the regression label and an initial Grapher multi-task learning model in combination with a multi-task loss function; and determining a transient stability state and a transient stability margin of the power system based on the real-time operation data and by using the target Grapher multi-task learning model. Therefore, the accuracy of transient stability evaluation is improved.

The invention discloses a multi-domain fusion motor torque zero-crossing compensation control system and method, and the method comprises the steps: obtaining a motor rotor angle according to a motor rotation position signal, and calculating an actual motor rotation speed; calculating an equivalent motor rotating speed according to the wheel speed signal; according to the driving mode, the accelerator pedal change rate, the driving habit information and the road information, calculating a dynamic threshold value of an absolute value of a difference value between the actual motor rotation speed and the equivalent motor rotation speed; judging whether the reduction gearbox backlash is closed or not; judging whether the driving demand torque reaches a calibration value or not according to the accelerator pedal opening degree; calculating a target motor torque according to the opening degree of an accelerator pedal, judging whether the wheel speed is greater than a set value or not according to a wheel speed signal, judging whether feedforward torque compensation is needed or not according to judgment results of whether a reduction gearbox backlash is closed or not and whether a driving demand torque reaches a calibration value or not, and if so, calculating a feedforward compensation torque and superposing the feedforward compensation torque with the target motor torque; and if not, outputting the target motor torque as the motor torque instruction.

The invention discloses a dynamic balance adjusting device and method for a magnetic suspension fan rotor, and relates to the technical field of self-adaptive adjustment. The method comprises the steps of collecting a suspension bearing displacement signal, a magnetic suspension coil current signal, a machine body vibration acceleration signal, a motor end electromagnetic response signal and a rotor angular displacement parameter, and constructing a rotor operation signal set; performing preprocessing and feature extraction on each signal to obtain four types of feature data; inputting the comprehensive characteristic data into a rotor balance diagnosis model to identify the unbalance state of the rotor; based on an amplitude phase inversion algorithm, solving a virtual counterweight amplitude and a phase adjustment amount, and injecting into a suspension coil to execute adjustment; judging whether dynamic correction is needed or not according to the real-time comprehensive characteristic data, and if yes, generating a dynamic gain coefficient to correct the adjustment parameters and then injecting the adjustment parameters into the suspension coil again; according to the invention, real-time identification and self-adaptive adjustment are carried out on the mass unbalance vibration of the magnetic suspension fan rotor, the operation vibration of the rotor is effectively inhibited, and the balance stability and reliability of the system are improved.

The invention discloses a brushless motor rotor angle determination method and device, equipment and a storage medium. The method comprises the following steps: synchronously acquiring original angle data of a Hall sensor, an incremental encoder and a back electromotive force observation module; respectively determining confidence coefficients of the Hall sensor, the incremental encoder and the back electromotive force observation module according to the rotating speed of the rotor, and performing weighted fusion on the original angle data of the Hall sensor, the incremental encoder and the back electromotive force observation module to obtain an initial fusion angle; based on the motor temperature, the motor phase current and the rotor speed, calculating a temperature drift compensation angle through a segmented temperature drift coupling model, and compensating the initial fusion angle according to the temperature drift compensation angle to obtain a temperature drift compensated angle; and inputting the temperature drift compensated angle into an extended Kalman filter for state estimation and filtering to obtain a rotor angle estimation value at the current moment. By means of the method, high-precision real-time calculation of the rotor angle within the wide temperature range and the full rotating speed range can be achieved.

An electromagnetic transient modeling method and system for a high-efficiency synchronous machine, and, a device. The method comprises: predicting, of a synchronous machine, a first rotor angular velocity, a first rotor angle, and a first current q component of and a first current d component of an armature current, establishing a first Norton circuit for simulating the synchronous machine, and solving at the same time a second Norton circuit after equivalent transformation and a network conductance matrix so as to obtain a three-phase voltage of a synchronous machine port; according to the three-phase voltage, obtaining a second current q component, a second current d component, a second rotor angular velocity and a second rotor angle; and by means of error-controlled iterative solving, determining an electromagnetic transient simulation calculation result of the synchronous machine.

The invention relates to the field of magnetic suspension motor driving control, and discloses a high-reliability motor commutation method based on same-frequency displacement conversion of a magnetic suspension rotor, and the method comprises the following steps: collecting a multi-channel rotor displacement signal of a magnetic suspension bearing system; carrying out same-frequency positive-sequence component extraction and phase locking calculation to obtain a rotor space angle position estimation value; multiple paths of redundant rotor angular position signals are constructed, and main rotor space angular position signals are generated; executing initial alignment and error correction of a motor rotor angle, and locking an angle compensation value in a closed loop mode based on the waveform change rate of the direct current bus current at the pre-estimated commutation moment; synthesizing the motor commutation angle, and generating a pulse width modulation signal to drive the motor to operate. A magnetic suspension rotor displacement signal is processed through a second-order generalized integrator cascade instantaneous symmetric component method, so that the effect of high signal-to-noise ratio rotor position detection is realized by directly utilizing an existing magnetic bearing displacement sensor under the condition that a Hall element or a photoelectric encoder does not need to be additionally arranged.

A method for rotor angle estimation for a 3-phase BLDC or stepper motor with a saliency ratio different from 1 includes receiving a requested duty cycle per motor phase from a motor control algorithm or deriving it from an output voltage per motor phase. The method involves providing a PWM pattern to each motor phase during operation, where the PWM pattern per motor phase matches the requested duty cycle or includes an equal fixed additional duty cycle. Current slopes in each motor phase are measured during active PWM pulses, and these measured current slopes or their average are compared to estimate the rotor angle.

The invention relates to a method, a device and equipment for determining the operation condition of a switched reluctance motor. The method includes obtaining a first data set of phase inductance, phase current, and rotor angle for the switched reluctance motor. The method further includes expanding the first data set into a second data set by the neural network model, the phase inductance in the second data set being associated with the flux linkage of the switched reluctance motor, the flux linkage being used to determine the operating condition of the switched reluctance motor. Through the mode, the data sets of the phase inductance, the phase current and the rotor angle can be expanded based on the neural network model, the situation that only the switched reluctance motor is observed to collect data is avoided, the data size of the data sets is increased, the collection cost of the data sets is reduced, and therefore the accuracy of the flux linkage and the operation condition is improved; and thus, the control accuracy of the switched reluctance motor is improved.

This invention provides a method, apparatus, device, and medium for determining the rotor temperature of an asynchronous motor, thereby improving the accuracy of determining the real-time rotor temperature. The method includes: determining the real-time slip angular velocity; wherein the slip angular velocity is the difference between the stator angular velocity and the rotor angular velocity; determining the real-time rotor resistance based on the slip angular velocity and the q-axis rotor voltage equation; and determining the real-time rotor temperature based on the real-time rotor resistance and a preset formula; wherein the preset formula corresponds to the temperature change characteristics of the rotor resistance.

A motor starting control method, device, and system, the method including: accumulating electrical parameter to obtain accumulated electrical parameter values, which are alternately assigned to a direct-axis electrical parameter and quadrature-axis electrical parameter; accumulating an angular increment to obtain accumulated values of a forced-driving angle; generating a control signal for a motor based on real-time values of the direct-axis electric parameter, quadrature-axis electrical parameter, and forced-driving angle; the control signal drives the motor; repeating said steps until the direct-axis electrical parameter or the quadrature-axis electrical parameter reaches a target electrical parameter, and then continuing accumulating to obtain the accumulated values of the forced-driving angle while forcibly driving the motor based on the corresponding control signal; when the real-time value of the forced-driving angle stays in sync with the rotor angle, the motor completes the startup; the motor is driven by alternately applying two perpendicular forces to the rotor.

The invention relates to the technical field of plastic pipe cutting, and provides a multi-angle band saw operation control method and system.The method comprises the steps that vibration data, current data and rotor angles at different collection moments are collected in the plastic pipe cutting process, and the target collection moment is marked; constructing a vibration sequence, a current sequence and a rotor angle sequence at a target acquisition moment; determining a cutting misalignment degree, a cutting misalignment degree sequence and a cutting misalignment degree predicted value sequence at the target acquisition moment, and determining a notch form offset degree at the target acquisition moment according to the difference between the cutting misalignment degree sequence at the target acquisition moment and the cutting misalignment degree predicted value sequence; and an integral gain adjustment value at the target acquisition moment is calculated, and real-time adjustment of operation of the multi-angle band saw for plastic pipe cutting is achieved in combination with the rotor angle at the target acquisition moment. According to the method, the integral gain is adaptively valued, and the cutting track offset is reduced.

The invention discloses a permanent magnet synchronous motor sensorless efficient starting method based on residual Hall sensors, and the method comprises the steps: monitoring the signals of three Hall sensors in real time, judging the current electrical angle interval of a rotor according to the residual Hall signals, and selecting the middle angle of the interval as a pre-positioning angle, direct-axis current is injected for directional pre-positioning; and after the pre-positioning is completed, performing second positioning, detecting whether the Hall signal has expected jump, starting the motor by adopting an I / f control mode from the verified positioning angle, performing forced calibration on the estimated rotor angle by utilizing the edge of the residual Hall signal, and operating the rotor angle observer. According to the invention, when the Hall sensor is partially invalid, the remaining Hall information is used to realize directional pre-positioning; the success rate and the efficiency of starting the position-free sensor are improved; smooth switching to position-sensorless control is achieved, and reverse rotation and shaking are avoided.

The invention discloses a motor rotor angle determination method, system and device and a medium, and relates to the technical field of motor detection.The method comprises the steps that angle collection is conducted on a rotor of an electric power steering motor in real time through a magnetic encoder, and a real-time detection angle is obtained; acquiring a historical amplitude, a historical angle tracking error and a historical zero offset value output by the zero offset compensation adaptive wave trap after previous angle acquisition, and a historical angle output by the phase-locked loop; performing adaptive processing based on the real-time detection angle, the historical amplitude, the historical angle tracking error, the historical angle and the historical zero offset value by using a zero offset compensation adaptive wave trap to obtain a real-time reference signal; and inputting the real-time reference signal into a phase-locked loop for angle tracking error compensation to obtain a real-time target angle of the rotor. According to the invention, continuous signal processing can be directly carried out through the zero offset compensation adaptive wave trap and the phase-locked loop, and the calculation amount and noise influence are reduced, so that the result accuracy can be improved.

The application provides a control method, device and equipment of an actuator of a vehicle and a storage medium, and comprises: determining whether a vehicle self-control instruction is received; if the vehicle self-control instruction is received, forming a control strategy based on a rotor angle of a vehicle driving motor, a first communication detection signal, a second communication detection signal or a battery remaining capacity, and controlling a specific actuator of the vehicle to operate based on the control strategy. By using the technical solution provided in the application, the problem that the vehicle may appear non-driver expected action or false failure to stop in a strong electromagnetic interference environment such as an aluminum electrolysis plant is solved, and the vehicle can stably run at low speed in a strong electromagnetic interference working condition, so that the reliability and safety of the vehicle are improved.

The invention discloses a sensorless field-oriented control motor driving method and device for a molecular pump, and relates to the technical field of molecular pumps, and the method comprises the steps: S1, starting a motor, and obtaining related data; s2, positioning a rotor; s3, rotor acceleration; s4, judging whether a stable condition is met or not, if so, entering S5, and otherwise, returning to S3; s5, obtaining related data; s6, whether the rotor speed reaches the standard or not is judged, if yes, S13 is executed, and if not, S7 is executed; s7, analyzing the current component and the current; s8, analyzing a back electromotive force component; s9, analyzing a rotor angle estimation value and an angular velocity estimation value; s10, outputting a voltage instruction; s11, generating and compensating a PWM driving signal; s12, driving the three-phase inverter, and returning to S5; s13, judging whether to stop or not, if so, stopping, and if not, stably operating; counter electromotive force estimation, rotor angle tracking, current control and starting and closed-loop switching processes are cooperatively designed, so that the problem of insufficient suitability of a traditional scheme in application of the molecular pump is solved, and the high-speed and high-torque requirements of the adaptive molecular pump are met.

The invention discloses a three-dimensional angle eccentric permanent magnet synchronous motor electromagnetic force wave calculation method based on magnetic conductance correction, and the method comprises the following steps: obtaining the parameter information of a motor in a normal state, calculating the air gap flux density of the permanent magnet synchronous motor under a load through the parameter information of the motor, and obtaining the radial flux density and the tangential flux density; a magnetic conductance correction coefficient under static eccentricity is introduced, and radial flux density and tangential air gap flux density after eccentricity are obtained through calculation; calculating radial force waves and tangential force waves acting on the surfaces of the stator and the rotor during eccentricity according to the flux density after eccentricity; and introducing a magnetic conductance correction coefficient under inclined eccentricity to obtain a three-dimensional electromagnetic force wave which changes along with a space axial position under angular eccentricity of the inner rotor of the permanent magnet synchronous motor. According to the method, by introducing the axial eccentricity correction coefficient, the electromagnetic force wave of the permanent magnet synchronous motor in the angular eccentricity state of the inner rotor is represented as a function about the axial coordinate, and the technical problem that a traditional two-dimensional eccentricity model cannot process axial angular eccentricity is effectively solved.

The application relates to the technical field of rotary transformers, in particular to a rotary transformer control protection circuit and a protection method thereof, wherein the circuit compares a feedback signal with a normal feedback threshold interval to determine the circuit state of the rotary transformer, can realize fast response to the abnormal state of the circuit, and thus protects the circuit in time. Meanwhile, when the feedback signal is in the normal feedback threshold interval, the feedback signal detection circuit can be regarded as an open circuit due to the high-impedance input characteristics of the comparator, the current of the feedback signal shared by the feedback signal detection circuit is very small, the feedback signal detection circuit cannot lower the amplitude of the feedback signal received by the AD decoding chip, the accuracy of the rotor angle calculated by the AD decoding chip is ensured, and the independence of protection and measurement is realized.

The invention relates to an air conditioner and a control method thereof. The air conditioner comprises two draught fans, inverters connected with the draught fans respectively and a controller connected with the inverters, and the controller is configured to determine current reference values corresponding to the draught fans according to the rotating speeds of the draught fans and feedback currents output to the draught fans at the current moment based on the rotor angle positions of the draught fans. According to the current reference value and the voltage corresponding to the fan when the inverter is in different switching vectors, current predicted values of the fan at the next moment when the inverter is in different switching vectors are predicted respectively, the current reference value and the current predicted values are substituted into a value function so as to determine a target switching vector, and the target switching vector acts on the inverter, so that the current reference value is obtained. By adopting the air conditioner provided by the invention, the number of devices can be reduced, so that the cost is reduced, and meanwhile, the fan is driven by adopting the predictive control strategy, so that the inverter has lower switching frequency, and the loss of the air conditioner is reduced.

A nonlinear and adaptive alternating-current servo electric motor angular position control method and system includes: acquiring original electric motor rotor angular position data; inputting the original electric motor rotor angular position data into a rotor angular position control module; performing second-order time differentiation on the electric motor rotor position data, so as to generate electric motor rotor angular acceleration data; inputting the electric motor rotor angular acceleration data and an output from the rotor angular position control module into an incremental inverse dynamic control module at the same time; and inputting the output from the incremental inverse dynamic control module into an electric motor current control module.

A device for determining the angular position of a rotor of a rotary electric machine on the basis of signals delivered by a plurality of position sensors. The device includes a circuit that applies a control loop to estimate the position of the rotor, and that delivers as output a signal representative of the position of the rotor. Also included is at least one circuit for performing dynamic processing of an odd-order harmonic of a signal resulting from the signals delivered by the position sensors.

The utility model discloses an angular displacement sensor vibration tool capable of adjusting a rotor angle, and belongs to the technical field of auxiliary tools. Comprising a bolt a (2), a pressing ring (3), a shaft locking piece (4), a main body (5), an adjusting rod (6), a gland (7), a bolt b (8), a bolt c (9) and a bolt d (10). According to the utility model, the design of flexible adjustment and control of the rotor angle of the angular displacement sensor is realized by using a friction locking principle and an ingenious structure. The problem that an existing angular displacement sensor vibration tool cannot meet the requirement for effective control over the rotor angle is solved, and the applicability and practicability of the tool are improved. The angle of the sensor rotor is flexibly adjusted, the requirements of different vibration tests are met, and the flexibility and multifunctionality of the tests are improved. The tool is simple in structure and easy to manufacture and install, and has sustainability and economical efficiency.

The invention discloses a permanent magnet water pump system for wafer manufacturing temperature control equipment and a control method, and belongs to the technical field of semiconductor manufacturing. The system comprises a permanent magnet synchronous motor, a magnetic coupler, an impeller, a pump cavity and a controller. The magnetic coupler achieves non-contact torque transmission through the driving half shaft, the driven half shaft and the isolation sleeve, heat conduction is isolated, and motor parameters are prevented from being affected by temperature. The controller estimates magnetic coupling angle deviation by utilizing a nonlinear elastic angle-torque relation based on a position-sensorless algorithm, realizes high-precision rotor angle estimation in combination with current information, and has intelligent protection functions of slipping, locking, idling and the like. The problems that a traditional alternating current asynchronous motor is narrow in speed regulation range and poor in low-speed load and a permanent magnet motor parameter temperature excursion are solved, and the alternating current asynchronous motor has the advantages of being wide in speed range, high in precision, high in reliability, high in adaptability and the like and is suitable for high-cleanliness and high-precision temperature control scenes in wafer manufacturing.

Method for determining the rotor angular velocity of a power steering motor in a vehicle, in which data representing information on the rotor angular velocity are used, the acquired data are filtered with a filter so that filtered data are obtained, and the filtered data are evaluated to determine the rotor angular velocity.

There is described a method of detecting a fault during low rotational speed operation, the fault relating to determination of a rotor angular position of a permanent magnet synchronous machine (111) having at least one set of multi-phase stator windings, the method comprising: checking consistency (1) of at least two independent rotor angular position determination methods, thereby using at least an encoder-based method and a high-frequency injection-based method; if at least one consistency check fails, a fault (13, 14) is indicated.

The invention discloses a permanent magnet synchronous motor rotor polarity judgment method and a permanent magnet synchronous motor. The method comprises the following steps: injecting high-frequency voltage to obtain an initial observation angle by extracting high-frequency current response; selecting an injection angle closest to the initial observation angle from injection angles of two-two conduction and three-three conduction corresponding to a single voltage vector as a first injection angle, and determining an angle which differs from the first injection angle by 180 degrees as a second injection angle; and injecting square wave pulses at the first injection angle and the second injection angle respectively to obtain a first current vector and a second current vector, and taking the initial observation angle or an angle which differs by 180 degrees from the initial observation angle as a rotor angle based on a comparison result of the current vectors. According to the method, two angles are selected from 12 injection angles of two-two conduction and three-three conduction for rotor polarity judgment, so that the difference value between the voltage vector injection angle and the real position is reduced, and the accuracy of rotor polarity judgment is improved.

The application discloses a speed re-throw control method, device and equipment of a double three-phase permanent magnet synchronous motor, relates to the motor control technical field, and comprises the following steps: taking the current command and the voltage command as zero, and measuring the counter electromotive force of the double three-phase permanent magnet synchronous motor; determining the first rotor angle of the double three-phase permanent magnet synchronous motor according to the counter electromotive force, and controlling the double three-phase permanent magnet synchronous motor according to the first rotor angle; setting the d-axis current command as non-zero, and measuring the output voltage of an inverter; determining the second rotor angle of the double three-phase permanent magnet synchronous motor according to the output voltage of the inverter, and controlling the double three-phase permanent magnet synchronous motor according to the second rotor angle; estimating the third rotor angle of the double three-phase permanent magnet synchronous motor according to the current command, the voltage command and the phase currents of the double three-phase permanent magnet synchronous motor, and controlling the double three-phase permanent magnet synchronous motor according to the third rotor angle. The method can reduce the inrush current during the restart and improve the performance of the speed re-throw.

The embodiment of the invention discloses a holder motor rotor angle positioning method and device, equipment and a storage medium, and relates to the technical field of motor rotors. The method comprises the following steps: acquiring an external differential Hall signal value and an internal differential Hall signal value of a pan-tilt motor; determining a rotor magnetic pole interval according to the external differential Hall signal value; determining the initial angle of the rotor according to the internal differential Hall signal value; and obtaining a rotor positioning angle according to the rotor magnetic pole interval and the rotor initial angle. Thus, rotor coarse positioning is performed through the external differential Hall signal value of the pan-tilt motor, and rotor accurate positioning is further performed by using the internal differential Hall signal value, so that two-stage Hall positioning with higher positioning accuracy is realized, the positioning cost can be reduced, an encoder is not needed, and the positioning cost can be reduced.

The air conditioner comprises a refrigerant circulation loop, an outdoor fan module and a controller, and the controller is configured to receive three-phase current; determining a zero crossing point of the three-phase current; determining a rotor angle and a rotating speed of the outdoor fan based on the zero crossing point of the three-phase current; the operation state of the outdoor fan is controlled on the basis of the rotor angle and the rotating speed, so that the outdoor fan is started in the forward and reverse directions, and the problem that in the prior art, due to weak signals and large external interference, the rotor angle and rotating speed estimation deviation is large, and consequently starting of the outdoor fan fails is solved; the influence of outdoor air on starting of the outdoor fan is effectively overcome, and the success rate of clockwise and counterclockwise starting of the outdoor fan under different conditions is remarkably increased.