33 results about "Magnetic chain" patented technology

The invention relates to the technical field of servo control, in particular to a high-precision current closed-loop control system and method for a servo driver, and the method comprises the steps: collecting three-phase current, rotor position, winding temperature and bus voltage, and constructing a state data set; constructing a parameter identification model fusing physical prior and an attention mechanism, deducing inductance and flux linkage parameters influenced by temperature, saturation and cross coupling, and correcting a motor model in real time; the correction parameters are injected into an FOC decoupling and feedforward link, and a self-adaptive PI regulator is linked to set the gain of a current loop on line; calculating a d-q axis voltage command according to the update model to respectively control excitation and torque components; an extended state observer is introduced to estimate load abrupt change and parameter disturbance, feed-forward compensation is carried out, and three-phase PWM is generated through anti-Parker and SVPWM; and an inverter nonlinear compensation model of a dead zone and switch delay is constructed, PWM is pre-distorted and output to a power device, and robust and low-ripple current closed-loop control of the servo motor is realized.

The present invention belongs to the technical field of parameter identification for permanent-magnet synchronous motors. Disclosed are a parameter identification method and apparatus for a permanent-magnet synchronous motor, and a storage medium and a device. The method comprises: using a variable step-size feedback neural network algorithm to solve a voltage equation and a d-q axis current discrete state equation, which take cross-coupled inductance into consideration, of a permanent-magnet synchronous motor in a dq coordinate system, so as to obtain intermediate parameters generated in the process of constructing the d-q axis current discrete state equation; and performing calculation on the basis of the intermediate parameters, so as to obtain the stator resistance, the d-axis inductance, the q-axis inductance, the cross-coupled inductance and the permanent-magnet flux linkage of the permanent-magnet synchronous motor, and thereby completing parameter identification. The present invention takes cross-coupled inductance into consideration and uses the variable step-size feedback neural network algorithm, such that the computational load is extremely small, the degree of complexity is reduced, rapid and effective identification can be realized, and errors can be reduced; in different convergence time periods, the algorithm adjusts the step size on the basis of the magnitude of steady-state errors, such that identification results approach stable values more quickly, thereby improving the speed and stability of convergence.

The invention provides an oblique coil electromagnetic classificator for separating weak magnetic impurities from strong magnetic concentrate, which comprises a separation cylinder, an ore feeding device and a flushing device, an ore feeding pipe of the ore feeding device extends into the separation cylinder from the top end of the separation cylinder, the flushing device is arranged below the ore feeding pipe, and an oblique coil is arranged on the outer side of the separation cylinder, so that the weak magnetic impurities can be separated from the strong magnetic concentrate. Magnetic lines of force are obliquely distributed, magnetic linkages formed by magnetic particles are oblique, the whole magnetic linkages can be efficiently impacted in cooperation with vertical component force Fz of water flow of the flushing device, and scattering of magnetic aggregates is facilitated; the tail control flat coil and the concentrate gathering flat coil at the upper end and the lower end effectively control tailings and concentrates respectively, so that the separation efficiency of strong magnetic concentrates and weak magnetic impurities is improved, for example, in the iron-titanium separation operation of vanadium titano-magnetite ore dressing, ilmenite mixed into iron ore concentrates can be reduced, the grade of the iron ore concentrates can be improved, and titanium metal resources can be fully recycled.

The invention discloses a flux linkage interpolation model adaptive gradient scheme-based switched reluctance motor sensorless control method, which comprises the following steps of S1, designing a flux linkage interpolation model FLIM by representing flux linkage characteristics of rotor misalignment and alignment positions of a switched reluctance motor SRM; s2, designing an adaptive gradient optimization algorithm, and estimating the optimal position of the rotor by updating an interpolation function in real time; and S3, aiming at the phase fault problem, providing a fault-tolerant strategy, namely fault phase flux linkage reconstruction FPFR, and reconstructing the flux linkage at the fault phase. According to the method, FLIM magnetic flux link modeling, adaptive gradient optimization and FPFR fault-tolerant control are combined, and the FLIM model not only significantly reduces the modeling complexity, but also lays a foundation for high-precision observation. According to the adaptive gradient method, real-time dynamic optimization is realized through a magnetic flux link error, and the inherent problems of calculation complexity and response lag of a traditional observer are effectively solved. The FPFR strategy reconstructs the fault phase magnetic flux characteristics, and a feasible solution is provided for high-reliability application.

The invention discloses a permanent magnet synchronous motor inductance matrix automatic calibration method and system, and the method comprises the steps: carrying out the system initialization, permanent magnet flux linkage reference calibration, weak magnetic region progressive current scanning, inductance parameter differential calculation and parameter integration, employing a positive and negative q-axis current symmetric excitation and differential operation mechanism as the core, and automatically counteracting the influence of a resistance item. Meanwhile, the weak magnetic working range of the d-axis current from-100A to-1000A is completely covered, and a full-working-condition inductance parameter two-dimensional mapping table is generated. The system does not need extra precision equipment, is small in algorithm calculation amount, is high in calibration efficiency, can adapt to batch application of a production line, can directly integrate a mapping table into a motor controller, achieves the real-time high-precision parameter calling through an interface function and two-dimensional linear interpolation, remarkably improves the torque precision and operation stability of field-weakening control of the permanent magnet synchronous motor, and is suitable for popularization and application. The method is suitable for motor parameter calibration in the fields of electric automobiles, industrial servo and the like.

The invention relates to the technical field of converters, in particular to a power dispatching system based on a multi-level direct current chopping technology, which comprises a flux linkage trend analysis module, a duty ratio constraint module, a standby unit evaluation module and a path synchronization coordination module. According to the method, the power integral curve is constructed in real time, the flux linkage increment trend is analyzed, the relevance between the flux linkage direction and the current change is dynamically judged, the duty ratio amplitude limiting range is adjusted in combination with the exponential smoothing prediction model, and phase compensation correction is executed, so that the dynamic response capability of the system is remarkably improved; a sliding standard deviation algorithm is adopted to screen a standby unit group and analyze a current fluctuation coefficient, linear regression is combined to process a temperature change trend, the anti-interference capability of the system is enhanced, a dynamic time warping algorithm is adopted to calculate a phase offset and construct a voltage difference vector, accurate synchronous control of a multi-level architecture is realized, and the stability of the system is improved. Harmonic content and energy loss are effectively reduced, electric energy conversion efficiency and equipment operation stability are improved, and the service life of a power device is prolonged.

The application discloses a kind of magnetic seed induced mineral separation methods of iron ore, comprising the following steps: (1) processing mixed iron ore obtains dry magnetic separation concentrate and dry magnetic separation tailings;(2) dry magnetic separation tailings magnetization roasting obtains artificial magnetite;(3) dry magnetic separation concentrate is mixed with artificial magnetite;(4) the raw ore into mill is sent into one-stage closed-circuit grinding classification system, then enters one-stage low-intensity magnetic separation operation;(5) one-stage low-intensity magnetic rough concentrate is sent into two-stage closed-circuit grinding classification system, then enters two-stage low-intensity magnetic roughing operation;(6) two-stage low-intensity magnetic roughing concentrate is demagnetized after entering two-stage low-intensity magnetic cleaning operation by demagnetizer;(7) two-stage low-intensity magnetic cleaning concentrate is concentrated after demagnetization by demagnetizer, and iron concentrate product is obtained by flotation.The application adds natural magnetite contained in ore into artificial magnetite, which is easy to form magnetic chain with natural magnetite as core to strengthen the magnetic separation recovery of artificial magnetite, and the separation process has high iron recovery rate and high concentrate grade.

This application discloses a magnetorheological extrusion mode suspension and its control method, an on-board terminal, and a vehicle. The magnetorheological extrusion mode suspension includes: a sleeve; a bracket located inside the sleeve; a hollow support member located between the sleeve and the bracket; a magnetorheological fluid located within the cavity of the hollow support member; and a coil disposed on the bracket at a position corresponding to the cavity. The normal direction of the coil extends radially along the sleeve and passes through the magnetorheological fluid. Different current intensities result in different magnetic field intensities and different yield strengths of the magnetorheological fluid; different current directions result in different magnetic field directions, different magnetic flux directions, and different damping forces of the magnetorheological fluid. Therefore, the intensity and direction of the current can be adjusted according to the excitation conditions to form magnetorheological fluids with different yield strengths and different damping forces to adapt to vibrations in a wide frequency range and achieve better vibration isolation effects across the entire frequency range.

The invention provides a motor angle and rotating speed determination method and system, electronic equipment and a storage medium. The method for determining the angle and the rotating speed of the motor comprises the following steps: detecting first voltage and first current of the motor; obtaining a first flux linkage according to the first voltage, the first current and a voltage model in a flux linkage observer; obtaining a second flux linkage according to the first current and a current model in the flux linkage observer; determining a third flux linkage according to the first flux linkage, the second flux linkage and a switching function in the flux linkage observer; and inputting the third flux linkage into a phase-locked loop module to determine the angle and the rotating speed of the motor. According to the method, the first flux linkage is determined by inputting the voltage and the current of the motor into the voltage model, the second flux linkage is determined by inputting the current into the current model, and then the final third flux linkage is obtained according to the first flux linkage, the second flux linkage and the switching function, so that the anti-interference capability of estimating the flux linkage position is improved; and the problems of direct current bias and integral saturation are avoided.

The invention belongs to the technical field of rare earth permanent magnet material preparation, and provides a neodymium-iron-boron magnet and a preparation method for improving the orientation degree of the sintered neodymium-iron-boron magnet, and the preparation method comprises the step of sintering a neodymium-iron-boron green body in a magnetic field. Preferably, the magnetic field is a direct-current magnetic field, and the magnetic induction intensity of the direct-current magnetic field is 10-13T. The high-intensity magnetic field can magnetize magnet powder particles in the sintering process, so that a magnetic chain is formed among the powder particles, the binding force among the particles is improved, and the powder particles cannot rotate due to the generation of a liquid phase. The neodymium-iron-boron powder particles are arranged according to the magnetic field direction in the sintering process, so that the high orientation degree of the magnet is ensured, and the high-performance neodymium-iron-boron magnet is obtained.

The invention relates to the field of medical equipment, and discloses a magnetic ring array treatment device, which comprises at least two closed magnetic rings or magnetic linkages, the magnetic rings or magnetic linkages are arranged in a fan shape, a circle shape or a spherical arc shape and then are fixed on a fixed support to form a magnetic ring array, and at least one metal coil is wound on each magnetic ring or magnetic linkage. A closed loop is formed between each of the two ends of each metal coil and one alternating signal generating circuit; in the magnetic ring array, preset alternating electric fields generated in the magnetic rings or the magnetic linkages are superposed and converged at a focal point. When in use, a carrier of tumor cells which are rapidly split is directly placed on a convergent focus of a preset alternating electric field generated in each magnetic ring or magnetic chain in the magnetic ring array, so that a superposed alternating electric field can be generated in the tumor cells which are rapidly split, similar to energy concentration, and a disease part can be treated more effectively; alternating electric fields in different directions can be generated, disease parts can be treated from different angles, and the device does not need to be tightly attached to the skin.

The invention relates to the field of motor control methods, in particular to a motor torque precision control method and device, a medium and equipment, and the method comprises the steps: obtaining a first stator flux linkage estimation value of a d axis and a second stator flux linkage estimation value of a q axis of a stator when a motor operates at a low speed, the first stator flux linkage estimated value is the sum of the flux linkage of the permanent magnet and the flux linkage generated by the d-axis current through the inductor, and the second stator flux linkage estimated value is the flux linkage generated by the q-axis current of the stator through the inductor; when the motor runs at a high speed, acquiring third stator flux linkage estimated values of the d axis and the q axis of the stator, calculating a difference value between the voltage signal and the current signal of the d axis and the q axis of the stator, and performing integration to obtain the third stator flux linkage estimated value and an actual flux linkage estimated value of the motor; and calculating the ratio of the actual flux linkage estimated value to the initial permanent magnet flux linkage to obtain a torque error compensation coefficient of the permanent magnet flux linkage influenced by the temperature, and correcting a q-axis current instruction output by the MTPA lookup table based on the torque error compensation coefficient to correct a torque error. According to the invention, temperature compensation is carried out on motor torque control, so that the motor can accurately and stably output at different temperatures, and the torque output precision of the motor is improved.

The application relates to the technical field of robot control, and discloses a control method and system for a robot finger joint, which comprises the following steps: performing multi-physical field signal acquisition, injecting a high-frequency excitation into a driving voltage, and extracting a current response; using a high-frequency response to analyze a resistance value, combining a heat conduction model to calculate a real-time temperature of a coil, and reconstructing an effective magnetic chain of a permanent magnet according to a temperature coefficient; according to the temperature, lubricating viscous characteristics are mapped, and an adaptive chatter signal with the amplitude and frequency dynamically mapped to a thermal state is generated in combination with a real-time rotating speed; based on the effective magnetic chain, a torque conversion coefficient is corrected, and the chatter signal is superimposed to a current loop to generate a target current instruction to drive a motor. Through the construction of a sensorless thermal magnetic observation mechanism and a thermal viscous coupling compensation strategy, the application effectively solves the problems of thermal parameter drift and friction nonlinearity of a miniature joint caused by space limitation, and guarantees high-precision torque output and low-noise smooth operation in a full-temperature-range working condition.

The present application belongs to the field of wireless power transmission, and particularly relates to a multi-rectangular transmitting coil of a wireless power transmission system and an assembling method thereof, aiming to solve the problem that the magnetic field of the existing multiple rectangular coils will cause the magnetic chain and the induced voltage of the receiving coil to fluctuate greatly when the receiving coil moves to the vicinity of the handover area of the adjacent transmitting coil. The present application comprises: in the N rectangular transmitting coils, the first rectangular transmitting coil comprises a left plane bending area, a straight area and a right plane bending area, and the i-th rectangular transmitting coil comprises a left upper and lower plane bending area, a straight area and a right plane bending area; the left upper and lower plane bending area of the i-th rectangular transmitting coil is arranged below the right side of the straight area of the (i-1)-th rectangular transmitting coil as an overlapping area; a magnetic core plate is arranged above the overlapping area, and i is an element of [2, N]. The magnetic field of the present application is relatively uniform in the entire transmitting coil coverage length range, without the need for additional hardware circuits or software algorithms, and the present application has the advantages of less material laying, simple installation and the like.

The invention relates to a ship PMSM control method and system based on an adaptive overcompensation multi-vector cascade sliding window integral model, and the method comprises the steps: S1, building a PMSM mathematical model considering parameter mismatch and model uncertainty, and calculating a k + 1 moment axis current, PMSM torque and d-axis flux linkage equation without disturbance compensation; s2, the torque of the PMSM at the k + 1 moment without disturbance compensation and the d-axis flux linkage error are converted into a shaft current compensation signal to be fed back to the shaft current, and a k + 1 moment shaft current, PMSM torque and d-axis flux linkage equation with disturbance compensation is constructed; s3, predicting a k + 2 moment axis current, a PMSM torque and a d-axis flux linkage equation based on the k + 1 moment axis current with disturbance compensation, applying a sliding integral window and designing an adaptive integral weight, and designing and evaluating a cost function in a novel proportion-integral form so as to select an optimal inverter switching vector; and S4, flux-weakening control is designed on an outer ring, a d-axis current reference value is provided, and flux-weakening operation optimization is realized.

According to the electromagnetic composite tool, the electromagnetic composite magnetic field cluster magneto-rheological polishing device comprising the electromagnetic composite tool and the polishing method, a strong coupling magnetic field generated by the electromagnetic composite tool changes the clamping capacity of a magnetic chain string to a machining abrasive, the mechanical property of a magneto-rheological polishing pad is improved, the shear yield stress of the magneto-rheological polishing pad is enhanced, and the polishing effect is improved. And the magnetorheological polishing pad is in the dynamic change process, the machined abrasive can be clamped again along with rotation of the polishing disc, the self-sharpening updating capacity of the abrasive is enhanced, machining nonuniformity is reduced, and machining efficiency is improved. Different processing environments are adapted by increasing or reducing the types of the magnetic field generating devices and changing the intensity of the generated magnetic field, and compared with a frame for processing a plurality of magnetic field generating devices, the magnetic field generating devices are variable and share one outer frame structure, so that the manufacturing cost of the device is reduced, and the processing flow is simplified.

The invention relates to a motor flux linkage observation method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring a motor rotating speed and a switching frequency; determining a carrier ratio based on the motor speed and the switching frequency; if it is determined that the motor is in a low-speed operation state according to the carrier wave ratio, obtaining a current current value of the motor, and calculating a resistance voltage loss value of the motor according to the current current value; if it is determined that the motor is in a non-low-speed operation state according to the carrier wave ratio, a compensation function based on current amplitude and phase and a current current value of the motor are obtained, and a resistance voltage loss value of the motor is calculated according to the current current value and the compensation function; and based on the resistance voltage loss value, a flux linkage observation value of the motor is calculated through a flux linkage observation model. By adopting the method, the accuracy and performance of motor flux linkage observation can be improved.

The invention discloses a full-automatic magnetic bead cleaning and separating device for a chemiluminescence immunoassay analyzer, and relates to the technical field of chemiluminescence immunoassay equipment.The full-automatic magnetic bead cleaning and separating device comprises an outer shell, and the top end of the outer shell is rotationally connected with a supporting rotary disc used for bearing test tube pieces; the problem that magnetic beads at the bottom cannot be effectively separated due to the fact that the magnetic beads cannot be effectively separated due to the fact that the magnetic beads are easily blocked by impurities in the prior art is solved, the magnetic beads can be cleaned only after multiple times of separation, and through the transmission design of a traction push rod and a multiplication chain, the displacement output of the push rod can be amplified; the lifting stroke of the flexible magnetic chain is more accurate and controllable, the structural linkage not only ensures the movement stability of the flexible magnetic chain when the flexible magnetic chain is close to or far away from the test tube, avoids unstable magnetic attraction force caused by shaking, but also can flexibly adjust the position of the flexible magnetic chain according to the distribution condition of the magnetic beads in the test tube, and further enhances the magnetic bead adsorption effect.

This invention belongs to the field of mineral processing particle washing and beneficiation technology, and discloses a washing and separation device for iron ore, including a feed chamber and a device body. The feed chamber is located on and connected to the device body. An electromagnetic coil is arranged at the axis of the device body. The magnetic field generated by the electromagnetic coil is generated downward in a circulating pulse manner to guide the iron concentrate to settle downward. An indentation zone is provided in the middle of the device body, which is used to form eddy currents in the lower section of the device body to break up magnetic agglomerates. This invention outputs pulse levels through the PLC controller port, and controls the conduction of the large circuit via a relay to supply pulse current, thereby forming a circulating and single downward flowing pulse magnetic field that pushes and attracts the iron concentrate downward. In addition, such a pulse magnetic field can effectively prevent the formation of magnetic agglomerates, and the pulse magnetic field is also conducive to breaking up magnetic agglomerates and magnetic chains, thereby separating gangue impurities in magnetic agglomerates and magnetic chains.

The invention relates to the field of medical equipment, and discloses an alternating electric field device of a three-dimensional magnetic ring, which comprises at least one group of three closed magnetic rings or magnetic linkages (1) fixed on a rack, and the central axes of the three magnetic rings or magnetic linkages in each group are respectively positioned in three surfaces of a three-dimensional coordinate system XYZ and intersect at the original point of the three-dimensional coordinate system XYZ. At least one metal coil (2) is wound on each magnetic ring or flux linkage, and two ends of each metal coil respectively form a closed loop with an alternating signal generating circuit; each alternating signal generating circuit circularly loads preset alternating current on each metal coil in turn, and each preset alternating current circularly generates a preset alternating electric field of which the center points to the original point in each magnetic ring or magnetic chain in turn; in use, the carrier of the cells that are rapidly split is located at the origin. The device can act on tumor cells which are rapidly split from different directions and different angles as much as possible, no electrode exists, the device does not need to be tightly attached to the skin for use, and the comfort level is high.

The application belongs to the technical field of permanent magnet motor modeling, and discloses a mathematical modeling method of an asymmetric interior permanent magnet motor, which specifically comprises the following steps: considering that the permanent magnet axis of the asymmetric interior permanent magnet motor is ahead of the maximum reluctance axis by 45 degrees of electric angle, selecting the permanent magnet axis as a reference direct axis, and establishing an air gap distribution function of the asymmetric interior permanent magnet motor; according to the air gap distribution function, successively establishing winding magnetic potential, magnetic density and flux distribution functions under the action of A-phase, B-phase and C-phase currents, and calculating an inductance matrix of the asymmetric interior permanent magnet motor; performing park transformation on the motor model in a three-phase coordinate system to obtain a mathematical model of the asymmetric interior permanent magnet motor in a corresponding dq coordinate system. The application realizes the establishment of the mathematical model of the asymmetric interior permanent magnet motor considering the magnetic axis offset, and provides a model basis for the control method design and operation performance analysis of the asymmetric interior permanent magnet motor with improved torque component utilization.

An abrasive flow polishing device (and method) for polishing of an inner surface of slender tubes includes a workbench, fluid processing units and a magnetic control fluid unit. Two fluid processing units are symmetrically mounted on left and right sides of the workbench. The slender tube is connected to the fluid processing units. Left and right ends of a slender tube are connected to the fluid processing units on the left and right sides of the workbench. The magnetic control fluid unit is disposed below the workpiece, and controls magnetic particles in a polishing liquid through a magnetic field applied by a magnetic pole to form a magnetic chain with a certain yield strength in a direction of a magnetic force and form a local blocking block adsorbed on an inner surface of the workpiece to reduce an actual aperture for flowing the polishing liquid in the blocking area.

The present application relates to the technical field of static magnetic chain measurement of electromagnetic mechanism, and particularly discloses a DC electromagnetic mechanism coil static magnetic chain measurement method, which comprises the following steps: step one, building a DC electromagnetic mechanism coil current test platform; step two, establishing a measured current decomposition and filtering model to filter out irrelevant high-frequency noise signal interference; step three, establishing a DC electromagnetic mechanism coil inductance equivalent improved first-order RC mathematical model; step four, establishing an improved first-order RC weighted fitting model of the coil current-time relationship; step five, establishing an optimal improved first-order RC weighted fitting model of the DC electromagnetic mechanism coil current-time relationship; and step six, solving the total magnetic chain of the coil based on the magnetic chain model.The present application has the beneficial effect that the fast and accurate measurement and calculation of the electromagnetic mechanism coil magnetic chain can effectively determine the saturation degree of the DC electromagnetic mechanism, and better assist the electromagnetic mechanism design.

The invention discloses a light-sensing intelligent girth ruler capable of being automatically triggered. Relates to the technical field of medical instruments and intelligent measurement. The ruler belt assembly comprises a flexible main ruler belt and a measurement magnetic suction end, one end of the flexible main ruler belt extends into the handheld main body and is wound on the ruler belt roller, a segmented magnetic suction chain belt is arranged on the flexible main ruler belt in the axis direction, the measurement magnetic suction end is arranged at the other end of the handheld main body relative to the flexible main ruler belt, and a closed detection circuit is arranged on the measurement magnetic suction end; the segmented magnetic chain belt is composed of a plurality of rigid modules which are sequentially connected in series through flexible hinges, more than two permanent magnets are embedded in each rigid module, and magnetic poles of the permanent magnets in the adjacent rigid modules are alternately and differently arranged in the extending direction of the flexible main ruler belt. According to the light-sensitive intelligent circumference ruler capable of being automatically triggered, automatic triggering, light-sensitive measurement, error compensation and wireless transmission are integrated, and the measurement efficiency, precision and user experience can be improved.

The invention provides a preparation method and application of a one-dimensional nano magnetic chain, and particularly relates to a one-dimensional nano magnetic chain taking a nano magnetic bead as an inner core and a molecular polymer as a shell. The invention further provides a colorimetric chromatography platform based on the one-dimensional nano magnetic chain, a preparation method and application of the colorimetric chromatography platform and a colorimetric chromatography detection method. The 1-DMC with the one-dimensional chain structure has magnetic responsiveness and a color development function, can load biomolecules at high density, accelerates the reaction process and enhances a chromatography color development signal. The method effectively solves the problems of weak signal, low sensitivity and poor anti-interference capability of the traditional chromatography technology, does not need complex equipment, meets the disease screening requirements of point-of-care testing (POCT) and primary medical treatment, and has wide clinical application prospects.

The invention relates to the technical field of computers, in particular to an online parameter identification method, device and equipment for a permanent magnet synchronous wind driven generator and a storage medium. The method comprises the following steps: acquiring a stator angular velocity, a stator current d-axis component and a stator current q-axis component of the permanent magnet synchronous wind driven generator; according to the stator angular velocity, the stator current d-axis component and the stator current q-axis component, an inductance correction value and a flux linkage correction value of the permanent magnet synchronous wind power generator are determined; correcting the initial inductance value of the permanent magnet synchronous wind driven generator according to the inductance correction value to obtain a corrected inductance value; and correcting the initial flux linkage value of the permanent magnet synchronous wind power generator according to the flux linkage correction value to obtain a corrected flux linkage value. By adopting the scheme, the inductance value and the flux linkage value of the permanent magnet synchronous wind driven generator can be accurately obtained.

The application discloses a compressor resistance estimation method, system and device and related equipment. The method comprises the following steps: calculating permanent magnet chains of an alpha shaft and a beta shaft of a compressor, and calculating a magnetic chain amplitude of the compressor based on the permanent magnet chains and the permanent magnet chains to obtain the magnetic chain amplitude; obtaining a magnetic chain average value at a previous moment, and calculating a current magnetic chain average value of the compressor at the current moment based on the magnetic chain average value at the previous moment and the magnetic chain amplitude to obtain the current magnetic chain average value; calculating a pulsation component amplitude value of the permanent magnet chain at the current moment based on the current magnetic chain average value and the magnetic chain amplitude to obtain the pulsation component amplitude value at the current moment; determining a resistance adjustment step length at a next moment according to the pulsation component amplitude value at the current moment, and estimating a resistance value of a stator resistance at the next moment based on the resistance adjustment step length and a preset resistance default value to obtain a resistance estimation value of the stator resistance at the next moment. The method utilizes physical quantities of vector control to realize accurate estimation of the stator resistance.

The invention discloses a multi-cavity sorting and sheet mixing tool and method for eliminating the same-plate difference of stator cores, and relates to the technical field of motors, the multi-cavity sorting and sheet mixing tool comprises a long plate machine table, a feeding structure is installed on the upper surface of the left end of the long plate machine table, and a step mounting frame is fixedly connected to the middle position of the upper surface of the long plate machine table; the lower surface of the upper end of the stepped mounting frame is provided with a doped sheet grabbing structure; firstly, the position adjusting air cylinder is controlled to be started to drive the grabbing suction cup to move up and down, the grabbing suction cup can move up and down to drive three kinds of punching sheets in the multi-cavity loading frame to move upwards, and when the three kinds of punching sheets make contact with the surface of the magnetic chain belt upwards, adsorption of the multiple punching sheets is completed at the moment; then the transmission motor is controlled to start to drive the magnetic chain belt to rotate, the magnetic chain belt rotates to drive the three kinds of punching sheets to move rightwards, the position adjusting air cylinder and the conveying motor are used in cooperation to continuously complete conveying of the punching sheets, and the sheet mixing efficiency of the punching sheets is fully improved.

The application provides a permanent magnet synchronous motor external characteristic calibration data correction method, device and medium, relates to the permanent magnet synchronous motor calibration data processing technical field, and includes: obtaining the bus voltage and the rotating speed under the calibration condition, and obtaining the calibration permanent magnet magnetic chain; performing unit substitution to integrate a calibration data unit value table; the ratio of the bus voltage to the rotating speed and the calibration permanent magnet magnetic chain is input to the calibration data unit value, and the d-axis current unit data, the q-axis current unit data and the torque unit data are matched; obtaining the target bus voltage, the target rotating speed and the target rotor temperature, and obtaining the target permanent magnet magnetic chain; determining the correction input data, obtaining the target d-axis current unit data, the target q-axis current unit data and the target torque unit data; performing reverse unit substitution to obtain the target external characteristic data, and overcoming the problem that the permanent magnet synchronous motor external characteristic calibration data obtained by table lookup is inaccurate due to the difference between the actual rotor temperature and the calibration rotor temperature.