33 results about "Vector control system" patented technology

The present application relates to a kind of permanent magnet shielding motor vector control energy efficiency optimization method considering magnetic field lagging phase angle, belong to permanent magnet shielding motor control field.It is characterized by: by analyzing shield sleeve eddy current effect, the analytical expression of magnetic field lagging phase angle is derived using electromagnetic field theory;The lagging phase angle is introduced into permanent magnet flux linkage term to be corrected, and the eddy current loss of shield sleeve and stator iron loss are combined into equivalent iron loss component, and a system controllable loss model is constructed;Under the constraint of constant torque, the analytical expression of total controllable loss about direct-axis current is derived and the optimal direct-axis current given value is solved.The actual application introduces angle compensation in the coordinate transformation link of vector control system, and the optimal direct-axis current given value is sent into current regulator, the accurate decoupling of dq axis current is realized, the total loss of motor is reduced, so as to improve the overall efficiency of motor control system.

The invention discloses a dead-beat current prediction control method based on parameter adaptive online identification. The method comprises the steps of S1, mathematical modeling of a three-phase permanent magnet synchronous motor; s2, designing and simulating a vector control system based on PI control; s3, designing a dead-beat predictive current control algorithm; s4, vector control system simulation based on a dead-beat predictive current control algorithm; s5, analyzing the performance of the dead-beat predictive current control algorithm under the parameter mismatch condition; s6, a parameter identification algorithm based on model reference self-adaption; s7, performing model reference adaptive parameter identification algorithm simulation; and S8, performing parameter identification-based permanent magnet motor dead-beat predictive current control system simulation. According to the method, permanent magnet synchronous motor parameter identification based on a model reference adaptive algorithm is combined with dead-beat predictive current control, so that the stability and the interference resistance of the system are improved.

The utility model discloses a kind of torque vector control systems, including differential, the differential one side is connected with left half axle, the other side is connected with right half axle, the differential one side is equipped with transmission assembly to receive the power of vector motor output, the transmission assembly at least includes first planetary row and second planetary row sharing same connecting gear ring, the first planetary carrier of first planetary row is fixedly connected with left half axle;The second planetary carrier of second planetary row is fixedly connected with the shell of differential.The utility model has the beneficial effect mainly reflected in: the system has torque distribution function, and the radial space of double planetary row shared gear ring is smaller, by reasonable arrangement to vector motor and speed reduction mechanism, so that its application is more widely, and performance is stronger.Simultaneously, the system has torque distribution function, and energy consumption problem in yaw dynamics control and driving experience are considered;Can effectively improve the economy of car, steering stability and initiative safety.

This invention discloses a harmonic current injection active disturbance rejection control method for motors. It is a harmonic current suppression and tracking control scheme for permanent magnet synchronous motors based on an improved QRADRC. Strong disturbance suppression is achieved by embedding quasi-resonance in the ESO (Electronic Stability Oscillator), and high-precision tracking is achieved by embedding quasi-resonance in the control law. Combined with a dual-quasi-resonance coordinated tuning rule, harmonic current injection and control are completed directly within the dq synchronous rotating coordinate system without additional coordinate transformation. This invention is applicable to motor vector control systems based on the dq0 synchronous rotating coordinate system, and is particularly suitable for high-precision current control and active harmonic injection applications of surface-mounted permanent magnet synchronous motors under inverter nonlinearity, dead-zone effects, and parameter perturbations.

The invention discloses a phase-locked loop control method of a permanent magnet synchronous generator, which belongs to the technical field of motor control and wind power generation, and comprises the following steps: acquiring two-phase current and two-phase voltage under a static coordinate system, and calculating through a sliding-mode observer to obtain a shaft and an extended counter electromotive force estimated value of the shaft; designing a finite position set phase-locked loop based on Taylor series and a Newton iteration method, performing quadrant judgment and correction processing on a rotor position estimation value after primary iteration to obtain a final rotor position estimation value, performing differential operation on the final rotor position estimation value, and processing a differential result by using a low-pass filter to obtain a final rotor position estimation value; obtaining a rotating speed estimation value of a rotor, and integrating the sliding-mode observer and a finite position set phase-locked loop to a motor vector control system to realize position sensorless control; according to the phase-locked loop control method of the permanent magnet synchronous generator, the calculation burden is greatly reduced while the precision is ensured.

The utility model provides a vector control system and a vehicle. The vector control system comprises a transmission system and a torque vector control system, the torque vector control system comprises a clutch group; the clutch group comprises a first clutch and a second clutch; the transmission system is connected with a right wheel through a first clutch; the transmission system is connected with a left wheel through a second clutch; the transmission system is in transmission with at least one of the pair of wheels through the clutch set. Traditional complex mechanisms such as a differential mechanism and a bilateral speed reducer are omitted, and clutches are only arranged at the left wheel end and the right wheel end respectively. By means of the design, the number of parts is remarkably reduced, and the overall weight of the system is reduced. The simplified structure directly reduces the production cost, and provides convenience for subsequent maintenance. Through mutual switching control of the clutches, the rotating speed difference between the left half shaft and the right half shaft can be rapidly adjusted, and therefore accurate distribution of torque is achieved.

The application relates to a kind of twelve-phase permanent magnet motor control methods based on rotating shaft position observation, belong to motor control technical field. By equivalent twelve-phase permanent magnet synchronous motor to four three-phase control units;Design state observer based on rotating shaft for each unit to observe back electromotive force;Through phase-locked loop, the rotor position and speed signal of each unit is extracted from back electromotive force;According to master-slave control method, select one from four control units as master controller, use the rotor position and speed signal corresponding to the master controller as the final observation result of the system;At the same time, it is used as feedback signal, input to the double closed loop vector control system of twelve-phase permanent magnet synchronous motor, realize twelve-phase high-speed permanent magnet synchronous motor sensorless control. The observer based on rotating coordinate system of the application is better designed, and is more stable when low carrier ratio control.

The utility model relates to an intelligent control acquisition device for a marine permanent magnet motor, which includes an X1 junction box, an X2 junction box, an X3 junction box, an X4 junction box, and a main junction box; the X1 junction box, the X2 junction box, the X3 junction box, and the X4 junction box are respectively installed on the right side surface of the main junction box by screws; the X1 junction box, the X2 junction box, and the X3 junction box are all weak current junction boxes; the X1 junction box is used for leading wires for bearing temperature measurement and water leakage alarm; the X2 junction box is used for leading wires for winding temperature measurement; the X3 junction box is for resolver wiring; the X4 junction box is a heating tape, and the X4 junction box is a strong current junction box. The utility model is easy for later maintenance and repair; effectively monitors the health status of the motor operation; combines with a vector control system to make the permanent magnet motor operate under reasonable working conditions; effectively prevents the internal windings of the motor from condensing.

The invention relates to the technical field of motor detection, in particular to a medical operation high-speed permanent magnet synchronous micromotor rotor position detection method, which comprises the following steps: acquiring the output voltage and current of an alternating-direct axis current regulator; based on the output of the quadrature-direct axis current regulator, the position error and the rotating speed error of a motor rotor are calculated respectively, the output of the quadrature axis current regulator is subjected to low-pass filtering and then integrated to obtain a decoupling rotating speed, and then the decoupling rotating speed is integrated to obtain a decoupling rotor position angle; the output of the direct-axis current regulator is subjected to low-pass filtering and then compensation solution to obtain an estimated rotor position angle, and then the estimated rotating speed can be obtained after differential. The method does not depend on a motor model, motor parameters are not needed, the speed of a motor rotor is detected from voltage output by a quadrature-direct axis current regulator of a control system with direct axis current as a zero vector, and then the position of the rotor is detected after integration.

The invention discloses a permanent magnet synchronous motor adaptive sliding mode observation method based on fuzzy logic and DSOGI-PLL, and belongs to the technical field of motor sensorless control. According to the method, aiming at the buffeting and phase lag problems of a traditional sliding mode observer, a fuzzy logic controller is adopted to dynamically adjust the sliding mode gain and the F (s) function slope coefficient, and the buffeting of the system is effectively inhibited; meanwhile, a double-second-order generalized integrator phase-locked loop is introduced to carry out orthogonal decomposition and harmonic filtering on the back electromotive force signal, a fundamental component is accurately extracted, and phase delay is reduced. The method is embedded into a permanent magnet synchronous motor vector control system and can replace a mechanical position sensor to realize high-precision rotation speed and position estimation. Simulation and experiment results show that the method has remarkable advantages in the aspects of buffeting suppression and counter electromotive force estimation precision.

The application is suitable for the technical field of motor control, and provides a PMSM sensorless control method based on ESMO and SPLL, comprising: establishing a foc vector control mathematical model of a permanent magnet synchronous motor; designing an extended sliding mode observer by regarding back electromotive force as a state variable, adopting a double power sliding mode surface and a high-order sliding mode control law with an adaptive variable speed approaching term to complete back electromotive force observation; connecting an improved SOGI module with a compensation link to filter and process the observation signal and cross-compensate two-phase back electromotive force errors, optimizing a phase discriminator and a loop filter of a phase-locked loop, and extracting rotor position and speed; connecting the outputs of the observer and the phase-locked loop to a FOC vector control system to complete sensorless control closed loop building. The application effectively suppresses the chattering problem of the traditional sliding mode observer, improves the phase discrimination accuracy and dynamic response speed under low-speed working conditions, and enhances the anti-interference ability under load mutation.

The application discloses a global finite time convergence permanent magnet synchronous motor control method based on a backstepping method framework, comprising the following steps: 1) on a MATLAB platform of an upper computer, a permanent magnet synchronous motor control system is designed based on model-based design by using MATLAB / Simulink software; 2) a hardware circuit of a permanent magnet synchronous motor vector control system is built; 3) a finite time nonlinear extended state observer NLESO is designed; and 4) under a recursive control framework of the backstepping method, a super-spiral sliding mode algorithm with a second-order sliding mode characteristic is fused, and a globally finite time stable compound controller is designed. By integrating the observer convergence and the double closed loop stability, the application effectively suppresses the 'chattering' phenomenon of the traditional sliding mode control, and significantly improves the dynamic response speed, the steady state tracking accuracy and the anti-interference robustness of the motor in the whole working condition range.

The invention discloses a phase-locked loop control method of a permanent magnet auxiliary synchronous reluctance motor, which belongs to the technical field of motor control, and comprises the following steps: constructing a nonlinear flux linkage observer to obtain estimated values of a shaft and a shaft flux linkage, designing a finite position set phase-locked loop based on an inverse quadratic interpolation method, carrying out differential operation on the estimated value of a rotor position, and carrying out phase-locked loop control on the rotor position. Processing a differential result through a low-pass filter to obtain a rotating speed estimated value of a rotor, and integrating a nonlinear flux observer and a finite position set phase-locked loop based on an inverse quadratic interpolation method into a motor vector control system to realize position sensorless control; according to the phase-locked loop control method of the permanent magnet auxiliary synchronous reluctance motor, parameter setting is not needed, the robustness is high, the dynamic performance is good, and an innovative solution is provided for high-performance motor driving.

The invention discloses a single main rotor-double vector slave rotor heterogeneous multi-rotor layout, and relates to the technical field of unmanned aerial vehicle aircraft design, the layout comprises a main rotor arranged in the middle of a fuselage and two vector slave rotors symmetrically arranged on the left and right sides of the main rotor; the main rotor provides main lift force, the two vector slave rotors are provided with independent vector control systems respectively, the tension directions of the vector slave rotors can be deflected independently so as to carry out attitude control of pitching and yawing, rolling control is carried out by adjusting the rotating speed in a differential mode, and meanwhile the reaction torque of the main rotor is balanced by installing a preset inclination angle. According to the layout, the aerodynamic efficiency, the cruising ability and the flight control performance of the unmanned aerial vehicle are remarkably improved through a decoupled lift force and attitude control strategy.

The application discloses a permanent magnet synchronous motor rotor position filtering and zero position calibration method, which comprises rotor position filtering and coordinate transformation vector angle calculation and rotor zero position calibration; wherein: the rotor position filtering and coordinate transformation vector angle calculation is used for filtering the rotor position and completing the coordinate transformation vector angle calculation of the vector control system; the rotor zero position calibration is used for permanent magnet synchronous motor rotor and sensor zero position deviation calibration, and the obtained rotor position is compensated. The application can make the rotor position obtained by the sensor more stable and accurate, so as to ensure the high efficiency, stability and robustness of the electric drive system.

The present invention relates to a system for vehicle motion control (100) of a vehicle with at least a steering system and one or more of a brake system (24) and a torque vectoring system, a number of sensors (11.21) for sensing at least vehicle speed or wheel speed, yaw rate and wheel angle, said vehicle motion control system comprising a Yaw Stability Control (YSC) functionality comprising an oversteer control function, wherein the YSC function is arranged to be fail-operational.

This invention discloses a heterogeneous multirotor layout with a single main rotor and two vector slave rotors, relating to the field of unmanned aerial vehicle (UAV) design technology. The layout includes a main rotor located in the middle of the fuselage and two vector slave rotors symmetrically arranged on the left and right sides of the main rotor. The main rotor provides the primary lift, and the two vector slave rotors are each equipped with an independent vector control system, capable of independently deflecting their thrust direction for pitch and yaw attitude control, and differentially adjusting their rotational speed for roll control. Simultaneously, a preset tilt angle is used to balance the anti-torque of the main rotor. This layout, through a decoupled lift and attitude control strategy, significantly improves the aerodynamic efficiency, endurance, and flight control performance of the UAV.

The application relates to the technical field of motor control, and discloses a permanent magnet synchronous motor control method based on K-Means optimized fuzzy RBF neural network, which initializes fuzzy RBF neural network parameters through K-Means clustering; actual output values V of a permanent magnet motor vector control system are obtained through sampling, and the actual output values V are subtracted from given values V ★ to calculate the deviation and the deviation change of the system; a fuzzy RBF neural network controller is constructed, e(k) and e c (k) of the system are taken as inputs of the fuzzy RBF neural network controller, k p , k i , k d are obtained through a four-layer network, and the outputs are input into a PID controller to obtain an output control amount iq, and current loop PID control is continuously carried out; the motor control method has obviously improved steady-state and dynamic performance, has strong robustness, and can effectively enhance the anti-interference capability of the motor.

The application discloses a permanent magnet synchronous motor speed loop control method based on a DDPG algorithm, and comprises the following steps: constructing a motor vector control system to obtain the state of the permanent magnet synchronous motor during operation; constructing a DDPG intelligent controller, which comprises an Actor network, a Critic network, a target Actor network, a target Critic network, an experience replay pool, a first optimizer and a second optimizer, training the parameters of the Actor network and the Critic network to obtain a trained Actor network; inputting the state of the permanent magnet synchronous motor into the Actor network to output a quadrature-axis reference current; and transmitting the quadrature-axis reference current to the motor vector control system to control the speed of the permanent magnet synchronous motor in a wide speed regulation range according to the quadrature-axis reference current. The application realizes the fast response and high robustness control of the target rotating speed of the permanent magnet synchronous motor under the load mutation working condition.

A method for adaptively adjusting feedforward parameters of a vector control system of a permanent magnet synchronous motor, comprising the following steps: 1) setting an adaptive adjustment time threshold and a relationship curve segment number threshold; 2) segmenting a current-inductance relationship curve; 3) when the duration of the permanent magnet synchronous motor vector control system in a stable working condition is not less than the adaptive adjustment time threshold, adaptively adjusting the current loop feedforward parameters according to the following steps: 3-1) judging that the current direct-axis target current is in the n-th segment of the direct-axis current-inductance relationship curve and the current quadrature-axis target current is in the m-th segment of the quadrature-axis current-inductance relationship curve; 3-2) calculating the current direct-axis target voltage and the current quadrature-axis target voltage; 3-3) calculating the direct-axis inductance theoretical value and the quadrature-axis inductance theoretical value; 3-4) calculating the direct-axis feedforward parameter deviation percentage and the quadrature-axis feedforward parameter deviation percentage; and 3-5) calculating an end point update value to form an updated current-inductance relationship curve.

The application discloses a kind of vehicle-motor system discrete domain stability analysis methods of introducing kinetics model, based on the digital control system of permanent magnet motor vector control method, establish discrete system mathematical model;After model is determined, the model is analyzed using discretization D segmentation method, based on unknown speed ring PI parameter, establish equation group containing unknown parameter, obtain the relationship between PI parameter and system frequency, and the relationship between PI parameters characterized by system frequency;Based on this relationship, the stable domain boundary of system PI parameter value can be drawn;A simplified two-degree-of-freedom vehicle dynamics discrete model is established, and the critical vehicle speed that can maintain the stability of vehicle motion during steering is analyzed. The above two analysis results are combined, and the theoretical design scheme of the permanent magnet motor vector control system of electric vehicle is obtained, which ensures the stability of the permanent magnet motor system operation and ensures the stability of the vehicle steering motion.

The application relates to a permanent magnet synchronous generator rotor position and rotating speed estimation method based on SMO, which comprises the following steps: when a permanent magnet synchronous generator starts from zero speed, a sliding mode state observer is not started; the rotor position and rotating speed of the permanent magnet synchronous generator are extracted according to an established PMSG extended back electromotive force model; the rotor position and rotating speed meeting a set stable condition are taken as initial states of a previous beat before the sliding mode state observer is started, and the sliding mode state observer is started; the back electromotive force is estimated by using the sliding mode state observer; a Lyapunov function is constructed according to a current error, so that a sliding mode gain coefficient meets a stable condition of the sliding mode state observer; and the rotor rotating speed and position information are extracted from the estimated back electromotive force. The application effectively shortens a steady state regulation time, avoids possible overshoot, oscillation and other phenomena in a process of transition from an initial state to a stable state, and improves the stability of a permanent magnet synchronous generator vector control system.

The application relates to the technical field of aviation aircraft, and particularly discloses a kind of aircraft duct ring distributed omnidirectional vector control systems, and front vector control device and rear vector control device are respectively arranged at the outlet end of front duct and rear duct, each vector control device includes multiple groups of independently arranged vector vane units, and the complete coverage duct outlet full flow cross section;The pivot shaft of each group of vector vane units is arranged along the radial direction of the duct, the guide blade spanwise is along the circumference of the duct, and the guide blade chordwise is along the axial direction of the duct.Front duct fan unit and rear duct fan unit are respectively arranged in front duct and rear duct, and the installation height of front duct fan unit is lower than that of rear duct fan unit.The vector control system of the application has simple structure, high fault tolerance rate, and can be widely applied to industrial-grade unmanned aircraft, urban low-altitude manned aircraft, special vertical take-off and landing aircraft and other scenes, and fully meets the airworthiness design requirements of civil aircraft.

The invention discloses a sensorless control method for a synchronous reluctance motor, which is characterized by comprising the following steps of: firstly, respectively acquiring a two-phase static current signal and a two-phase static voltage signal of the synchronous reluctance motor, and then acquiring a first stator flux linkage through a voltage model in a composite flux linkage observer; a second stator flux linkage is obtained through a current model and converted into a third stator flux linkage, a flux linkage compensation feedback module obtains a difference value obtained by subtracting the third stator flux linkage from the first stator flux linkage and multiplies the difference value by a preset feedback coefficient to obtain a flux linkage compensation value, the flux linkage compensation value is fed back to the input end of a voltage model, and finally a compensated stator flux linkage observation value is output. The orthogonal phase-locked loop extracts an actual rotor position angle and an actual rotating speed according to the second stator flux linkage and the compensated stator flux linkage observation value and feeds back the actual rotor position angle and the actual rotating speed to the vector control system so as to control the synchronous reluctance motor to rotate; the method has the advantages that the observation precision is high, the dynamic performance is strong, and the position-sensorless control of the synchronous reluctance motor in a wide speed range can be realized.

The application relates to the technical field of motor detection, in particular to a medical operation high-speed permanent magnet synchronous micro motor rotor position detection method, which comprises the following steps: acquiring output voltage and current of a cross-axis current regulator; based on the output of the cross-axis current regulator, calculating a motor rotor position error and a rotating speed error respectively; after low-pass filtering and integration of the output of the cross-axis current regulator, a decoupling rotating speed can be obtained; after integration of the decoupling rotating speed, a decoupling rotor position angle can be obtained; after low-pass filtering and compensation of the output of the direct-axis current regulator, an estimated rotor position angle can be obtained; and after differentiation, an estimated rotating speed can be obtained. The method does not depend on a motor model and does not require motor parameters, can detect the motor rotor speed from the voltage output of the cross-axis current regulator of a zero vector control system with a direct-axis current, and then can detect the rotor position after integration.

The invention discloses a model prediction method for NPC type three-level inverter control in the technical field of multi-level power converters. The method comprises the following steps: S1, constructing an NPC type three-level inverter vector control mathematical model based on DSP modularization on an MATLAB platform of an upper computer; s2, establishing two-way communication between the upper computer and a hardware circuit of a preset NPC type three-level inverter vector control system based on DSP modularization; s3, state evolution of a hardware circuit is predicted, an event triggering mechanism is introduced, and whether a control instruction needs to be updated or not is judged; s4, outputting a voltage tracking reference voltage instruction to maintain the balance between the symmetry of the three-level output voltage and the neutral-point voltage; according to the method, computer simulation and a hardware system can be combined, and the switching frequency of an inverter system can be remarkably reduced through event-triggered model prediction control; by introducing an extended state variable into the system, high real-time performance and stability can be maintained under a high-frequency sampling condition.

The invention discloses a sensorless control method of a permanent magnet synchronous generator, which belongs to the technical field of motor control and wind power generation, and comprises the following steps: obtaining a voltage component and a current component under a static coordinate system, and calculating to obtain observation values of a shaft and a shaft flux linkage through a nonlinear flux linkage observer; and performing iterative calculation on the cost function of the finite position set phase-locked loop based on a Newton iteration method to obtain a rotor position estimation value, performing differential filtering processing on the rotor position estimation value to obtain a rotating speed estimation value of a rotor, and feeding back the rotor position estimation value and the rotating speed estimation value to a motor vector control system of the permanent magnet synchronous generator. Position-sensorless control is realized; according to the sensorless control method of the permanent magnet synchronous generator, the problems that a traditional method in a wind power generation system is heavy in calculation burden and slow in dynamic response are solved by optimizing a cost function and an iteration strategy.

The invention discloses a method for improving the dynamic decoupling performance of a current loop of a low-switching-frequency electric propulsion system, and the method is based on a vector control system which is composed of a rotating speed regulator, a complex vector current regulator, a coordinate transformation module, a PWM pulse generation module, a frequency converter and a multi-phase open-winding induction motor. The complex vector current regulator directly designed in the discrete domain can use d-axis and q-axis components of a reference current and a feedback current as input for subtraction, and directly calculates to obtain a voltage reference value of the discrete domain, so that a discretization process is omitted, and discrete errors are avoided; the complex vector current regulator considering digital control delay is directly designed in a discrete domain by adopting a pole-zero cancellation principle, the excitation and torque current decoupling performance in closed-loop vector control is improved, and the dynamic precision of the rotating speed is further improved.

The invention discloses a motor control method and system based on a sliding-mode observer and an improved phase-locked loop, and relates to the technical field of motor control, and the method comprises the steps: building a motor mathematical model under a static coordinate system, designing a variable-order sliding-mode observer integrated with stator resistance identification, obtaining a back electromotive force, and suppressing buffeting, the back electromotive force is input into an improved phase-locked loop with low-speed compensation and phase correction, rotor position and rotating speed information is obtained after reconstruction, commutation position errors are eliminated, multi-parameter coupling is collected to obtain compensation voltage, the inverter dead-zone effect is compensated, current and position estimation errors are fused, and online self-tuning PI parameters are achieved; relevant information and parameters are input into a vector control system, and inverter driving pulses are generated through inverse Park conversion and SVPWM modulation. Full-process cooperative control is realized, the estimation and control precision of each link is improved, the operation stability and reliability of the motor are enhanced, and different motors and working conditions are adapted.