41 results about "Rotor angle" patented technology

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.

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.

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.

The utility model provides a kind of steam turbine rotor angle visual device, belong to steam turbine dynamic balancing test equipment technical field.The device is by two surfaces of round plate respectively as identification surface and sticking surface;The identification surface is marked with a plurality of parallel lines, and the parallel line passes through the center of the identification surface, and a plurality of pairs of adjacent parallel lines are marked with different marks respectively;The sticking surface is fixed on the shaft end surface of the head of steam turbine or exciter, and the design of cooperating with moving rotating assembly and clamping assembly, solve the existing method of correcting steam turbine dynamic imbalance, because the field of view of balancing block mounting hole is narrow, hole position contrast is difficult to misalign, installation is time-consuming and the angle is easy to deviate.The device includes a round plate, two surfaces are identification surface and sticking surface respectively;Identification surface is marked with a plurality of parallel lines, and the parallel line passes through the center of the identification surface, and a plurality of pairs of adjacent parallel lines are marked with different marks respectively;The sticking surface is fixed on the shaft end surface of the head of steam turbine or exciter.

Embodiments of the present application provide a six-phase permanent magnet synchronous motor control method, device, equipment and storage medium. The method comprises: obtaining a current rotor speed of the six-phase permanent magnet synchronous motor, and determining a speed interval of the six-phase permanent magnet synchronous motor, wherein the speed interval comprises: a zero-low-speed zone, a transition zone and a medium-high-speed zone; determining a composite control strategy of a high-frequency square wave injection method and a sliding mode observation method according to a weighted composite algorithm and the speed interval, and controlling the six-phase permanent magnet synchronous motor by using the composite control strategy; and performing weighted processing on estimated results of the high-frequency square wave injection method and the sliding mode observation method according to the weighted composite algorithm, the speed interval and the current rotor speed, and then determining a target rotor angle and a target rotor speed. The embodiments of the present application can meet the performance requirements of the six-phase permanent magnet synchronous motor in various speed ranges, accurately obtain the rotor angle and improve the robustness.

The application discloses a power system transient stability state and stability margin evaluation method and device based on Graphormer multi-task learning, equipment and medium, relates to the electric power technical field, including: the node characteristics corresponding to the bus and the edge characteristics related to the power transmission line and the transformer branch are standardized to obtain the standardized characteristics; determine the binary classification label based on the power angle difference between each generator after the fault occurs, determine the regression label based on the difference between the generator rotor angle trajectory and the inertia center trajectory, utilize the standardized characteristics, the binary classification label, the regression label and the initial Graphormer multi-task learning model, and determine the target Graphormer multi-task learning model in combination with the multi-task loss function; determine the transient stability state and the transient stability margin of the power system based on the real-time operation data and by utilizing the target Graphormer multi-task learning model. To improve the accuracy of transient stability evaluation.

This invention discloses a sensorless speed and displacement control method for a bearingless permanent magnet synchronous motor. The method involves acquiring the current and voltage components of the torque winding in a stationary coordinate system, processing them through a nonlinear flux linkage observer to obtain a rotor angle error signal, and then processing this error signal through an extended state observer phase-locked loop to obtain the rotor speed and angle. Based on the deviation between the rotor speed and the speed setpoint, a closed-loop speed adjustment is performed to generate a torque winding control signal. The method also involves acquiring the motor-side current component and the current and voltage components of the levitation winding in a rotating coordinate system, processing them through an effective flux linkage observer to obtain the rotor radial displacement component in the rotating coordinate system, and then transforming this displacement component based on the rotor angle to obtain the displacement in the stationary coordinate system. Based on the deviation between this displacement and the displacement setpoint, a closed-loop displacement adjustment is performed to generate a levitation winding control signal.

The application discloses a three-stage starting generator rotor position estimation method suitable for a single-phase exciter, and belongs to the field of motor control. The method estimates the rotor d-axis current and extracts its outer envelope by applying an alternating voltage on the exciter stator side and collecting the stator current. The outer envelope crest and trough are detected to generate the discrete position state of the exciter. The discrete state of the main motor is generated according to the pole pair ratio and the duration is recorded. The discrete rotor position of the main motor and the interval average speed are calculated accordingly. The continuous rotor angle is obtained by using the previous interval speed compensation, and the real-time rotor position is obtained by combining the initial position. The application can realize high-precision estimation of the rotor position of the main motor by using only the electrical signal characteristics of the single-phase exciter itself, without the need for a mechanical position sensor. The application solves the problem that the existing method cannot be applied to the single-phase exciter structure, and has good stability and robustness in severe environments such as aviation high temperature and high pressure, strong electromagnetic interference and the like.

The application discloses a kind of intelligent monitoring method and system of vacuum pump operating state, specifically relates to vacuum pump technical field, the method gathers motor current, rotor position and inlet and exhaust pressure signal, solves real-time electromagnetic torque and motion parameter;With rotor profile and pressure calculation theory aerodynamic load, and calculate inertial torque;Through dynamics decoupling, obtain mechanical friction characteristic residual;Residual is mapped to rotor phase sector, by comparing sector statistical characteristics and global reference value, filter abnormal sector and output the physical angular range of pump cavity mechanical damage.The application effectively eliminates the interference of aerodynamic load fluctuation and speed change to monitoring signal through dynamics model, accurately decouples out pure mechanical friction characteristic, significantly improves the sensitivity and accuracy of early micro-fault identification;Meanwhile, the spatial mapping relationship between residual and rotor angle is established, the transformation of fault feature from time domain to space domain is realized, and the fault troubleshooting efficiency is greatly improved.

A method for determining the rotor angular velocity of a motor of a power steering system in a vehicle is disclosed. According to the method, data is collected representing information about the rotor angular velocity, the data is filtered with a filter so that filtered data is obtained, and the filtered data is analyzed to determine the rotor angular velocity.

This application discloses a joint motor control method, electronic device, and storage medium. By placing a position sensor only in the reducer, the internal structure of the joint is simplified, reducing the space requirement for position sensor installation, thereby reducing assembly difficulty and hardware cost. In cases where reducing the number of position sensors leads to less position detection data and the position sensor detection results lag behind the motion state of the drive motor, joint motion parameters are acquired, including the position parameters collected by the position sensors. Based on the joint motion parameters, a motor rotor angle is generated using a preset virtual axis model. The drive motor rotation is controlled according to the motor rotor angle, which is directly related to the actual position of the load end, ensuring high-precision control of the joint motor.

A method for reducing bias in a periodic signal with a theoretically zero average value provided by a sensor associated with a rotating electrical machine, in particular by a sensor for determining the angular position of a rotating electrical machine rotor, the method comprising: - receiving the signal provided by the sensor - multiplying this signal by a signal proportional to the rotational speed of the rotating electrical machine rotor to obtain a first signal - at least one integration over half a period of the first signal to obtain a second signal - applying a finite impulse response filter to the second signal, in particular a comb filter, to add a delayed version of this second signal to obtain a third signal representative of the bias, in particular equal to the bias of the signal provided by the sensor, and - subtracting the third signal from the signal provided by the sensor.in order to reduce the bias of this signal provided by the sensor. Abbreviated figure: Fig 3,

Described is a method of aligning a stationary rotor of a polyphase synchronous motor having a permanent magnet rotor to a configured rotor angle (θ). The method includes determining corresponding polyphase drive voltages for the synchronous motor based on a user-specified value of a two-axis synchronously rotating reference frame vector voltage (V) for a selected one of two axis of the two-axis synchronously rotating reference frame. Then, determining corresponding polyphase drive voltages for the synchronous motor; and applying said polyphase drive voltages for a predetermined, selected, or calculated time period to rotate the stationary rotor to align said rotor with said configured rotor angle (θ).

This application relates to the field of motor control technology and discloses a method for observing permanent magnet synchronous motors based on voltage models and flux linkages. The method includes: acquiring the voltage and current signals of the permanent magnet synchronous motor, processing them respectively through a voltage model observer and a flux linkage observer to obtain a first rotor angle estimate and a second rotor angle estimate; determining a first weighting coefficient of the voltage model observer and a second weighting coefficient of the flux linkage observer based on the current speed of the motor, with the sum of the weighting coefficients being 1. The weight of the voltage model observer is 1 at low speeds and the weight of the flux linkage observer is 1 at high speeds, with the weights smoothly changing with the speed in the transition speed range; and weighted fusing the two angle estimates based on the weighting coefficients to obtain the final rotor angle estimate. This application achieves high-precision, high-robustness sensorless control of the permanent magnet synchronous motor across the entire speed range, without requiring additional high-frequency signal injection, ensuring performance throughout the entire process from startup to high-speed operation.

The application relates to the technical field of motor control and serial communication, and provides a low-voltage small motor rotating speed monitoring method based on UART communication. The method comprises the following steps: sending a communication handshake data frame to a motor control board through a serial port to establish a stable serial port communication connection; generating a motor rotating speed setting instruction according to the equipment operation requirement and sending the motor rotating speed setting instruction to the motor control board through the serial port; receiving the data frame by the motor control board, obtaining an instruction code and a target rotating speed parameter through analysis and writing the instruction code and the target rotating speed parameter into a control register; according to the target rotating speed value, executing three proportional integral closed loop control algorithms of constant rotating speed, current limiting and power limiting, adopting a magnetic field oriented control mode to accurately control phase current and rotor angle of the motor, adjusting motor driving signals to realize the target rotating speed; encapsulating running data into feedback data frames by the motor control board, analyzing the feedback data, displaying the motor running state, sending new control instructions according to the feedback information, and realizing real-time control and monitoring.

The invention relates to an electric machine with one axis of rotation, comprising at least the following components: - a stator with a stator winding; - a rotor mounted on a rotor carrier with a rotor assembly fixed to the rotor carrier; and - a stator-side sensor unit for detecting the angular position and / or rotational speed of the rotor, wherein the rotor carrier has a first radial section, and wherein the first radial section comprises a rotor target for the sensor unit. The machine is characterized in particular by the fact that the rotor target comprises a first measuring section and a second measuring section, wherein the first measuring section is arranged at a first axial distance and the second measuring section at a second axial distance from the stator-side sensor unit, the first axial distance being greater than the second axial distance.The electric machine is equipped with a space-saving and cost-effective sensor for detecting the rotational speed and / or angular position of the rotor.

This invention discloses a closed-loop chemical flake system with nitrogen-sealed positive pressure protection, relating to the field of chemical flake control technology. The system includes: collecting feed mass flow rate, condensate heat transfer medium reflux heat exchange, and rotor angular velocity to construct an initial state tensor; generating a predicted main compartment volume collapse based on the initial state tensor, and performing band-resistance processing according to the mechanical cutting fundamental frequency to form a lead compensation command; synchronously driving the main and auxiliary gas paths, performing pre-gas replenishment on the upper part of the main compartment and isobaric replacement on the non-discharge zone of the rotary airlock after speed limiting via a micro-pressure clamping multi-hole array; and utilizing a micro-differential pressure transmitter array, oxygen concentration meter, hardware watchdog, isolation baffle, and corrugated compensation airbag for cruise control and disaster recovery interlocking. This system can suppress transient pressure loss, reverse air intake at the discharge end, and control vibration tracking during continuous flake formation, and improve the stability of the inert atmosphere.

The application discloses a synchronous motor open-phase detection method and related device, and relates to the technical field of synchronous motor control, and comprises the following steps: when a synchronous motor is in a light load or no load operation state, whether the synchronous motor has an open-phase fault is judged based on speed fluctuation or torque current fluctuation of the synchronous motor; after judging that the synchronous motor has an open-phase fault, first rotor angle of first phase current injection, second rotor angle of second phase current injection and third rotor angle of third phase current injection are calculated based on rotor speed of the current synchronous motor and current loop stabilization time of the synchronous motor; when the rotor of the synchronous motor rotates to the corresponding angle, a pulse type direct axis current is injected to obtain corresponding phase voltage, so that the specific open-phase condition of the synchronous motor is accurately confirmed through the corresponding phase current under the condition that the synchronous motor is least affected.

A power tool is provided including a housing, a brushless motor disposed within the housing, a power switch circuit that supplies power from a power source to the brushless motor, and a controller configured to apply a drive signal to the power switch circuit to control the supply of power to the brushless motor. The controller is configured to receive at least one signal associated with a phase current of the motor, detect an angular position of the rotor based on the phase current of the motor within a variable speed range of zero to at least 15,000 rotations-per-minute (RPM), and control the drive signal based on the detected angular position of the rotor to electronically commutate the motor within a power output of zero to at least 1500 watts.

Method for sensorless determination of the angular frequency (ωe) and / or position (φe) of a permanent magnet rotor of a brushless electric machine (1), in particular a linear or rotary machine, wherein a d-voltage (ud) and a q-voltage (uq) are provided to the electric machine (1), wherein a high-frequency d-test signal voltage (ud_inj) with a predetermined carrier frequency is applied to the d-voltage (ud) within the framework of an injection method, wherein several phase currents (i1, i2) of the machine (1) are measured and a demodulated current (iq_dem) is determined on the basis of the measured phase currents (i1, i2), wherein a d-voltage deviation (Δud) and a q-voltage deviation (Δuq) are determined on the basis of a motor model (9), in particular a mathematical one.wherein in a fusion device (6) the angular frequency (ωe) and / or position (φe) of the permanent magnet rotor is determined on the basis of the demodulated current (iq_dem) and the d-voltage deviation (Δud) and the q-voltage deviation (Δuq), wherein the fusion device (6) has a controller (22) with an integral component, in particular an integral controller, to which a sum signal is supplied which depends on the demodulated current (iq_dem) and the d-voltage deviation (Δud) and the q-voltage deviation (Δuq) and a feedback of the determined angular frequency (ωe) and / or position (φe) of the permanent magnet rotor, characterized in that the demodulated current (iq_dem) is supplied to a controller with a proportional component, in particular a proportional controller, and an output of the controller with a proportional component is used to generate the sum signal becomes.,

The invention discloses an alternating current servo system control method for controlling the stability of an obstacle breaking vehicle body, and the method comprises the steps: constructing an unscented Kalman filter (UKF) load observer based on the UKF, and estimating a load torque value and the rotor angular speed of a permanent magnet synchronous motor in real time through the UKF load observer; feeding back a rotor angular velocity output based on a UKF load observer to an extended state observer (ESO), introducing a load torque value as a feedforward compensation amount into an NLSEF control law, introducing a Newton-Raphson optimization algorithm (NRBO), and performing global optimization on parameters of an active disturbance rejection controller (ADRC) by taking an improved ITAE index as a fitness function; compared with the prior art, the method can improve the tracking precision and the anti-interference performance of the barrier-breaking vehicle under the complex dynamic working condition, and guarantees the stability of the barrier-breaking vehicle body in the advancing process.

A method for determining the rotor angular velocity of a motor in a vehicle's servo steering system, wherein data representing information about the rotor angular velocity is considered, the detected data is filtered using a filter to obtain filtered data, and the filtered data is evaluated to determine the rotor angular velocity.

This invention provides a sensorless control method for a permanent magnet synchronous motor, comprising the following steps: S1, simulating to obtain the id iq instruction table; S2, setting the motor speed ω to be less than the field weakening speed point, and collecting the three-phase current, voltage, and T of the motor. e S3, after performing Clark transformation on the three-phase current and voltage, i is obtained. α i β u α u β After obtaining the rotor angle, the position estimation module feeds it back to the park transformation unit and the park inverse transformation unit; S4, i α i β After performing the park transformation, we obtain i d i q The comparator in the current loop is fed back; S5, the id iq instruction table sends a set of instructions i to the comparator. d* i q* The system generates three-phase current through a PI current regulator, Park inverse converter, SVPWM module, and inverter. It then collects current, voltage, and electromagnetic torque, estimates the rotor angle, and repeats the current loop adjustment until the motor stabilizes. Finally, the id iq instruction table sends the next set of instructions. d* i q* S6, repeat S5 until all instructions in the id iq instruction table have been issued, and collect data; S7, calculate the optimal torque-speed-current relationship table through a mathematical model.

This application relates to the field of motor control technology and provides a method, device, and medium for positionless control of an air conditioning compressor. The method includes: acquiring the three-phase current of a permanent magnet synchronous motor in the air conditioning compressor and transforming it to an α-β coordinate system to obtain α-axis current components and β-axis current components; inputting the α-axis current components, β-axis current components, and the first α-axis control voltage and the first β-axis control voltage of the previous cycle to a back EMF observer based on an extended state observer to determine the rotor angle of the permanent magnet synchronous motor; determining the second α-axis control voltage and the second β-axis control voltage based on the α-axis current components, β-axis current components, and rotor angle; determining the three-phase duty cycle based on the second α-axis control voltage and the second β-axis control voltage; and driving the permanent magnet synchronous motor to run by controlling an IGBT inverter, thereby improving the robustness and position estimation accuracy of the positionless control of the air conditioning compressor.

This invention discloses a method, device, storage medium, and apparatus for determining the position of a motor rotor. The invention acquires the position signal of the motor rotor and converts it into a resolver signal; demodulates the resolver signal to obtain a demodulated sine envelope signal and a cosine envelope signal; acquires the sine value of the rotor position to be measured corresponding to the sine envelope signal, and the cosine value of the rotor position to be measured corresponding to the cosine envelope signal; and determines the actual position of the motor rotor based on the sine value of the rotor position to be measured, the cosine value of the rotor position to be measured, and the observed sine and cosine values ​​measured by a preset position observer. Because this invention improves upon existing technologies with low sampling rates and reliance on algorithm parameter settings leading to poor calculation accuracy, it enhances the adaptability of traditional rotor angle calculation methods to microcontrollers with slower sampling rates, thereby accurately obtaining the actual position of the motor rotor.

The present specification provides a method and device for adjusting the voltage of a controller of an electric vehicle and the electric vehicle. When the electric vehicle needs to perform a target operation process such as a deceleration process or a braking process, the target vehicle speed of the electric vehicle, the rotor angle of the motor, the current operating voltage of the controller, and the maximum charging current of the battery are first obtained; then, a preset electronic braking algorithm is called to calculate an intermediate voltage according to the target vehicle speed, the rotor angle of the motor, and the current operating voltage of the controller; and a preset vector control algorithm is called to determine the adjusted operating voltage of the controller according to the intermediate voltage and the maximum charging current of the battery. Thus, the operating voltage of the controller of the electric vehicle can be matched and accurately adjusted, and the adjusted operating voltage is used to operate the controller, so that the E-ABS electronic braking system can accurately control the electric vehicle to perform the target operation process, and the regenerated energy can be safely and effectively recovered and utilized.

This invention provides a method for obtaining the stator current value of a permanent magnet synchronous motor, comprising the following steps: S1, establishing a mathematical model in simulation software, simulating the parameters of the motor under test to obtain the id iq instruction table; S2, collecting the current three-phase current, rotor angle, and electromagnetic torque of the motor under test; S3, obtaining the values ​​after Clark and Park transformations of the values, and feeding them back to the comparator; S4, the id iq instruction table sends a set of instructions to generate three-phase current through a PI current regulator, Park inverse transformation, SVPWM module, and inverter, collecting the current, rotor angle, and electromagnetic torque data of the motor under test, repeating the adjustment until stable, and then the id iq instruction table sends the next set of instructions; S5, repeating step S4 until the id iq instruction table has sent all instructions, and using the collected data as the basic training data for constructing the mathematical model; S6, the mathematical model calculates the optimal torque-speed-current relationship table. This invention provides a simple and accurate method for obtaining data, applicable to different motors.

The application provides a flywheel energy storage driver voltage compensation correction method and device, equipment and medium, and belongs to the technical field of flywheel energy storage. The method comprises the following steps: calculating an initial bias power based on a direct current side initial charge-discharge power sequence under an initial delay compensation time, and updating the initial delay compensation time to obtain a first delay compensation time based on the initial bias power; cyclically performing a delay compensation time updating operation until the positive and negative signs of the bias power in the last two times are different, taking the latest obtained delay compensation time as a target delay compensation time, and calculating a space angle value of an output voltage of the flywheel energy storage driver; calculating an amplitude compensation amount of the output voltage based on rotor angular velocity data, compensating the amplitude of the output voltage based on the amplitude compensation amount to obtain a target output voltage amplitude, and determining a target output voltage based on the target output voltage amplitude and the space angle value. The application can realize the balanced output of the charge-discharge power of a low-carrier-ratio high-frequency high-power flywheel energy storage driver.