428 results about "Resolver" patented technology

The invention relates to a wheel speed redundancy detection system and method, computer equipment, a storage medium and a vehicle. The system comprises four groups of wheel speed detection modules and a first domain controller, the wheel speed detection module comprises a transmission, a driving motor, a rotary transformer sensor and a motor controller; the transmission is connected with wheels of the vehicle; the driving motor is respectively connected with the transmission and the motor controller; the rotary transformer sensor is arranged on the driving motor and is connected with the motor controller; the motor controller is also connected with the first domain controller, and is used for collecting the resolver signal, obtaining a motor rotating speed according to the resolver signal, and obtaining a corresponding wheel rotating speed according to the gear information of the transmission and the motor rotating speed; the first domain controller is used for performing motion control on the vehicle according to the wheel rotating speed. Redundancy of the vehicle wheel speed signals can be achieved based on the rotary transformer sensor, a wheel speed sensor does not need to be used, and a corresponding sensor wire harness does not need to be added, so that the vehicle using cost can be reduced, and the vehicle development period is shortened.

The invention provides a scraper conveyor coal flow real-time monitoring system and method, and belongs to the technical field of coal flow monitoring. The problem that the coal flow on the scraper conveyor is not uniformly distributed due to the fact that the coal cutting amount and the coal sweeping amount are not organically combined in the coal flow monitoring of the scraper conveyor in the prior art is solved. Comprising coal flow monitoring devices used for collecting coal flow data generated by coal cutting or coal sweeping of a left rocker arm or a right rocker arm in the coal mining process in real time, the two coal flow monitoring devices are connected with a coal flow resolver, and the coal flow resolver communicates with a coal mining machine control system and a scraper conveyor control system. The coal flow resolver is used for receiving data acquired by the coal flow monitoring devices on the left / right rocker arm, resolving the acquired data into actual coal flow, and sending the coal flow of the left / right rocker arm and total coal flow data to the coal mining machine control system and the scraper conveyor control system; the method is applied to monitoring and adjusting the coal flow of the scraper conveyor on the fully mechanized coal mining face.

A lidar system includes a transmitter that encodes successive transmit pulses with different pulse characteristics and a receiver that detects the pulse characteristics of each received (scattered or reflected) pulse and that distinguishes between the received pulses based on the detected pulse characteristics. The lidar system thus resolves range ambiguities by encoding pulses of scan positions in the same or different scan periods to have different pulse characteristics, such as different pulse widths or different pulse envelope shapes. The receiver includes a pulse decoder configured to detect the relevant pulse characteristics of the received pulse and a resolver that determines if the pulse characteristics of the received pulse matches the pulse characteristics of the current scan position or that of a previous scan position.

The invention discloses an integrated linear steering engine, which belongs to the technical field of linear steering engines, and comprises a shell, and a motor assembly, a transmission assembly and a sensor which are arranged in the shell, the transmission assembly comprises a multi-stage gear pair, a lead screw pair and an output shaft assembly. The lead screw pair output shaft assembly and the motor assembly are arranged in parallel. The multi-stage gear pair comprises an input gear, a transfer gear and an output gear which are sequentially arranged in a meshed mode, and the input gear is connected with the output end of the motor assembly. The lead screw pair output shaft assembly comprises a lead screw and a nut output shaft. One end of the lead screw is connected with the output gear, the other end of the lead screw is connected with the nut output shaft, and the nut output shaft extends out of the shell to achieve linear output. The sensor comprises a rotary transformer sensor, and the rotary transformer sensor is arranged at the end, away from the output end, of the motor assembly. The size and weight of the steering engine can be greatly reduced, and the steering engine has the advantages of being large in output torque and high in transmission precision.

The invention relates to the technical field of vulnerability detection, in particular to a code-level security vulnerability detection method, electronic equipment and a storage medium. The method comprises the steps of obtaining a logic graph corresponding to a target code, wherein the logic graph comprises a role node, a service entity node, an operation edge and an access constraint edge; obtaining an application scene label of the target code according to the logic graph; inputting the target code into an AST resolver to obtain a syntax tree corresponding to the target code; obtaining a sensitive function library B and a suppression function library C matched with the target code according to the application scene label of the target code; and judging whether the target code has security vulnerabilities or not according to the syntax trees corresponding to the B, the C and the target code. According to the method, the unauthorized risk vulnerabilities in the program codes can be effectively identified.

The invention discloses a whole vehicle zero position online self-learning method and system. The method comprises the steps that a motor controller sets a current zero position value as a median value of a first zero position interval, a vehicle is subjected to power-off and power-on operation, whether the vehicle shakes or not is judged, and if the vehicle does not shake, the current zero position value is a correct zero position value; if the absolute value of the rotating speed change rate of the motor is smaller than the first critical value and the absolute value of the torque value of the motor is smaller than the second critical value when the vehicle shakes, whether the motor torque is a correct zero value or not is judged after the motor torque is given, the situation that the vehicle does not shake but the zero value deviates is avoided, and the method is easy to operate, capable of achieving autonomous learning, high in applicability and suitable for popularization and application. The accuracy is high; the system comprises a motor controller, a rotary transformer, a judgment module and a motor, is suitable for executing the method, can complete zero-position self-learning only through simple power-on and power-off operation, can be applied to different motors and motor controllers, and has good expansibility.

The invention discloses a compensation method for an angle sensor of a permanent magnet synchronous motor, and the method comprises the steps: collecting an original output signal of the angle sensor, and carrying out the electrical angle compensation of the original output signal, and obtaining an electrical angle parameter compensation value; performing mechanical angle compensation on the original output signal to obtain a resolver zero deflection angle and a mechanical angle parameter compensation value; compensating an original output signal by using the electrical angle parameter compensation value, the resolver zero deflection angle and the mechanical angle parameter compensation value, and taking the compensated signal as an angle input signal for closed-loop control of the permanent magnet synchronous motor; the original output signals comprise two sinusoidal signals and two cosine signals. The signal error of the permanent magnet synchronous motor angle sensor can be corrected, and the control precision of the motor is improved.

The invention provides a double-rotor aero-engine built-in generator device and method, and the system comprises a second engine fulcrum, a third engine fulcrum, a two-fulcrum housing assembly, a bearing cavity, a sealing cover, a power output system, a built-in generator, a control system of the built-in generator, and an intermediate case, the two-fulcrum shell assembly is arranged above the two-fulcrum shell assembly; and the dual-redundancy resolver is integrated with the built-in generator, and a resolver signal line of the dual-redundancy resolver is led out by a lead support plate reserved on the intermediate case. According to the invention, a high-performance built-in generator scheme and system design in a narrow space are realized, and the electrodynamic transformation requirement of an aero-engine with a traditional architecture can be met.

The invention relates to the technical field of vehicle control, and discloses a pure electric commercial vehicle resolver observation mechanism which comprises the following steps: in a whole vehicle driving state, judging whether to enter an observation mode or not, if the rotating speed of a motor is greater than an observation threshold value, entering the observation mode; if the rotating speed of the motor is smaller than the observation threshold, the observation mode is not entered or quitted; after entering the observation mode, calculating according to an LO observation model to obtain a back electromotive force observed quantity; inputting the back electromotive force observed quantity into the phase-locked loop model, and calculating to obtain a target observed quantity; meanwhile, a real signal is acquired and decoded by the rotary transformer; the target observed quantity and the real signal both comprise an angle and an angular velocity; and comparing the real signal with the target observed quantity to judge whether fault early warning is needed or not and judge whether the real signal meets the observation expectation or not. The real state of the driving system can be accurately observed, the robustness and reliability are high, and the operation efficiency is high.

The invention discloses a zero-phase-shift-angle dual three-phase permanent magnet synchronous motor control method, solves the problem that DTP-PMSM current reconstruction control needs a single current sensor to perforate more than three branches, and belongs to the field of motor driving. According to a sampling mode and a modulation mode of ISAMPLE of a sum of current between A and B two-phase lower bridge arms of a first set of three-phase windings of a motor and current between X and Y two-phase upper bridge arms of a second set of three-phase windings, and spatial distribution characteristics of the two sets of windings of the motor, a reconstruction region is constructed; constructing a motor six-phase current reconstruction expression of each reconstruction region; selecting a corresponding six-phase current reconstruction expression according to the reconstruction area where the reference voltage vector is located and the ISAMPLE collected in real time, and reconstructing the six-phase current; and controlling the motor according to the reconstructed six-phase current. Unification of current reconstruction, torque ripple suppression and dual three-phase resolver delay compensation can be realized.

The invention provides an extended-range power assembly capable of achieving non-inductive starting, a shutdown method and a vehicle, relates to the field of new energy automobiles, and can be applied to extended-range electric vehicles. The range-extended power assembly comprises a generator and a motor controller, in the rotor rotation process of the generator, the motor controller is used for receiving a rotor position signal from a rotary transformer sensor, and the rotor position signal is used for indicating the rotor position angle of the generator. In the shutdown process of the engine, the motor controller is used for controlling a rotor of the generator to stop rotating at a preset rotor position according to a rotor position angle of the generator indicated by the rotor position signal after the engine flames out, and the shutdown process of the engine refers to the process that a piston of the engine is switched from a reciprocating motion state to a motion stopping state. According to the scheme, the problem of starting jitter or starting failure during starting of the engine can be effectively solved, engine side sensor data is not needed, control signal delay is low, reliability is high, and applicability is high.

The invention discloses a single-chip resolver / LVDT (Linear Variable Differential Transformer) signal-digital conversion method and circuit. The method comprises the following steps: generating an excitation signal; the excitation signal is input to a primary side coil of the rotary transformer / LVDT sensor; two pairs of differential signals output by the secondary side of the resolver / LVDT sensor are converted into single-end analog signals respectively, the difference is made, and first error signals are obtained; detecting the phase difference of two pairs of differential signals and excitation signals output by the secondary side of the resolver / LVDT sensor; converting the first error signal into a digital error signal; removing an excitation signal in the digital error signal to obtain a second error signal epsilon; judging whether the second error signal epsilon is approximately equal to 0 or not, if yes, completing conversion, and ending the process; otherwise, executing the next step; obtaining a digital displacement signal psi according to the second error signal epsilon; and feeding back the digital displacement signal psi to the digital-to-analog conversion module through sine and cosine transformation or linear transformation, and returning to execute the fifth step. The whole circuit is integrated on a single chip, the circuit structure is simple, implementation is easy, and the anti-interference capability is high.

A stator includes a stator core, a stator winding wound via an insulator provided at the stator core, and a terminal block arranged at an outer side in a direction of the stator core. The stator core includes an end portion protruding from an opening of a housing in an axial direction and is mounted to the housing by a mounting bracket being in contact with an end face of the end portion. The mounting bracket includes an annular portion having a C-shape, a connecting portion disposed between both ends of the annular portion, and a bent portion protruding upward in the axial direction at an inner circumferential edge portion of the annular portion. The bent portion is in contact with the end face of the stator core. The connecting portion includes a relief portion extending at a position away from the terminal block.

Variable reluctance (VR) resolvers applicable to even or odd speed are provided. In an N-phase VR resolver, 2N coil-poles are evenly distributed around the stator, N being odd integer greater than or equal to three. Primary coils are wound with the same number of turns, but their winding polarities alternate across the coil-poles. The number of turns and winding polarities for sine and cosine signal sensing coils are determined by sine and cosine synthesis coefficients of N-phase zero-force transform. The coil turns ratios between sine and cosine signal sensing coils relative to the primary coil are dictated by absolute values of the coefficients, while the winding polarities are determined by signs of the coefficients. In odd-speed VR resolvers, winding polarities of pair of sensing coils symmetrically located 180 degrees apart must be identical, whereas in even-speed VR resolvers, these winding polarities must be opposite.

The application provides a power assembly with reducer side wire outlet, a double-motor power assembly and an electric vehicle. The power assembly comprises an intermediate integrated shell, a resolver sensor, a motor and a reducer. The intermediate integrated shell comprises a partition plate and two circumferential shells. One circumferential shell is used for fixing a motor stator of the motor and accommodating a motor rotor of the motor, and comprises at least one through hole. The other circumferential shell is used for accommodating a gear set of the reducer. The partition plate is used for separating the inner cavities of the two circumferential shells. The partition plate comprises a shaft hole and at least one wire outlet hole. The shaft hole and the at least one wire outlet hole are used for connecting the inner cavities of the two circumferential shells. The shaft hole is coaxially arranged with an input shaft of the reducer or a motor shaft of the motor. The distance between the at least one wire outlet hole and the center point of the shaft hole is greater than the inner diameter of a resolver stator of the resolver sensor. The power assembly provided by the application has a smaller axial dimension.

The invention relates to a driving motor control method and device, electronic equipment and a vehicle, relates to the technical field of vehicles, and aims to improve the running stability of a motor. The method comprises the steps that under the condition that a rotary transformer signal measured by a position sensor or a calculated rotation angle is abnormal, an estimated rotation angle is determined based on electrical parameters of a driving motor in the vehicle; controlling the operation of the driving motor based on the estimated rotation angle; wherein the electrical parameters comprise at least one of the following items: voltage and current; and the position sensor is used for measuring a rotary change signal of the driving motor and determining a resolving rotation angle based on the rotary change signal. Therefore, under the condition that the position sensor cannot accurately measure the rotation angle, the normal operation of the driving motor is maintained by estimating the rotation angle.

A motor includes a housing including a housing base and a housing shaft portion that is provided on the housing base and extends in a direction along a rotation center axis, a motor stator that is disposed outward in a radial direction of the housing shaft portion, a motor rotor that is provided between the motor stator and the housing shaft portion, a bearing that is provided inward in a radial direction of the motor rotor and rotatably supports the motor rotor to the housing shaft portion, a sealing structure that is provided on an opposite side to the housing base in an axial direction of the motor rotor and seals between the motor rotor and the housing shaft portion, and a resolver that is configured to detect rotation of the motor rotor.

The invention relates to the technical field of motors, and particularly discloses a dual-redundancy servo motor which comprises a shell, and the interior of the shell is hollow. The driving mechanism comprises a permanent magnet alternating current servo motor and a transmission shaft, the permanent magnet alternating current servo motor comprises a stator and a rotor, and the stator drives the transmission shaft to rotate; the two brushless resolver engines are arranged adjacent to the transmission shaft, the two brushless resolver engines are both provided with resolver parts, and the resolver parts are connected with two annular resolver parts arranged at the two ends of the interior of the shell; the heat dissipation mechanism comprises a heat dissipation annular plate, a heat dissipation spiral pipe and a peristaltic pump; the servo motor overcomes the defects that in the prior art, the temperature control of the servo motor is poor, and the utilization rate of the internal space is low.

In accordance with various embodiments of the present disclosure, an integrated circuit for determining an angular position of an electric motor having a rotatable shaft and a resolver is provided. In some embodiments, the integrated circuit comprises (i) an angle sampling module adapted to receive a signal from the resolver and to repeatedly determine, at an angle sampling rate, the angular position of the rotatable shaft using the signal from the resolver, (ii) an interpolation module to determine an interpolated value of the angular position of the rotatable shaft at each cycle of a motor control loop rate, and (iii) a motor control module adapted to provide a pulse width modulated (PWM) signal to the motor. The PWM signal is based at least in part on the determined interpolated value of the angular position of the rotatable shaft determined at each cycle of the motor control loop rate.

The invention discloses a rapid target plate calibration device, and belongs to the technical field of laser boresighting, the device comprises a laser boresighting mirror and a laser resolver, the laser boresighting mirror is used for emitting laser beams, the laser resolver is installed on an aircraft target plate, a laser receiver of the laser resolver is used for splitting light, a vertical camera is installed at the top of the laser resolver, and the vertical camera is connected with a camera. A parallel camera is installed at the rear end of the laser resolving instrument, the laser receiver divides a received laser beam into two light beams perpendicular to each other, and the two light beams are transmitted to the vertical camera and the parallel camera respectively. Compared with the prior art, the device does not need a tedious aircraft leveling process, remarkably reduces the operation complexity, adopts an advanced laser image detection technology and a high-precision sensor, can realize high-precision fixed-axis measurement, adopts a near-infrared band CCD (Charge Coupled Device) industrial camera, is provided with a narrow-band optical filter at the front end, can effectively filter the interference of environmental visible light, and is high in measurement precision. The pose of the target plate is automatically adjusted through automatic calculation of an algorithm, and personal errors are reduced.

The invention discloses a quadrature error correction method and device, electronic equipment and a storage medium, and relates to the technical field of error correction, and the method comprises the steps: obtaining a quadrature error angle, an excitation angle and a rotation output shaft angle, the quadrature error angle being a phase deviation generated when the mechanical dislocation of a secondary winding of a resolver is not 90 degrees; constructing a correction signal according to the orthogonal error angle, the excitation angle and the rotation output shaft angle; and performing error correction on the resolver sine signal and the resolver cosine signal based on the correction signal to obtain a rotation demodulation signal. The technical scheme of the invention aims to completely eliminate the quadrature error.

A shipping jig for an e-motor includes a central axis, an annular disk arranged for fixing to a cover of the e-motor, and a cylindrical portion extending axially from the annular disk and arranged for axially and radially positioning a rotor carrier of the e-motor relative to a stator of the e-motor. The annular disk includes a first plurality of holes distributed about a first bolt circle and a second plurality of holes distributed about a second bolt circle, smaller than the first bolt circle. The cylindrical portion may also be arranged for radially positioning a portion of a resolver relative to the stator. The first plurality of holes may each have a same third diameter and the second plurality of holes may each have a same fourth diameter, greater than the same third diameter.

Processing circuitry comprising an analog-to-digital converter configured to perform the techniques of this disclosure. The analog-to-digital converter may obtain, based on electrical interactions with a resolver sensor, a noisy modulated digital cosine signal (NMDCS) and a noisy modulated digital sine signal (NMDSS). The processing circuitry includes a filter configured to process the NMDCS and the NMDSS to output a filtered NMDCS and a filtered NMDSS, and a rectifier configured to process the filtered NMDCS and the filtered NMDSS to output a rectified NMDCS and a rectified NMDSS. The processing circuitry includes a digital signal processor that executes a first trained machine learning model to process the rectified NMDCS and the rectified NMDSS to obtain a demodulated DCS and a demodulated DSS, and compute, based on the demodulated DCS and the demodulated DSS, an approximate angle of the rotating element.

The invention discloses a motor resolver angle calibration method and a related device. The method comprises the following steps: controlling a motor to accelerate to a preset first rotating speed based on a preset torque and an initial resolver angle, and carrying out zero clearing operation on the torque. The motor outputs the direct-axis voltage based on torque zero clearing, zero approaching control is carried out on the direct-axis voltage so as to adjust and update the resolver angle corresponding to the direct-axis voltage, the resolver angle corresponding to the direct-axis voltage meeting the set condition is determined as the target resolver angle of the motor, and the calibration efficiency of the resolver angle of the motor can be improved. Meanwhile, zero clearing operation is carried out on the torque, so that the motor determines the target resolver angle under loop control, the influence of the motor load can be reduced, and the accuracy of calibration of the resolver angle of the motor is improved.

To provide a method for manufacturing a rotor having a rotor shaft having a metal part and a resin part which can position rotation directions of the respective components with high dimensional accuracy.SOLUTION: A method for manufacturing a rotor 10 includes: a component arrangement step of arranging a resolver rotor 60, a rotor yoke 21, and a metal part 31 of a rotor shaft 30, in a first mold 110; and a resin filling step of filling a cavity CV formed by combining the first mold 110 with a second mold 120 with a resin and forming a resin part 40 of the rotor shaft 30, and integrally insert molding the resolver rotor 60, the rotor yoke 21, and the metal part 31. The first mold 110 is provided with a plurality of positioning parts P1, P2 and P3 for positioning each of the resolver rotor 60, the rotor yoke 21, and the metal part 31 in rotation directions of the rotor 10.SELECTED DRAWING: Figure 6

The invention provides a method and system for conveniently measuring the comprehensive backlash of a vehicle transmission system, and the method comprises the steps: measuring a motor resolver angle # imgabs0 # switched to an N gear or a P gear and a motor resolver angle # imgabs1 # switched to a D gear for multiple times through a motor resolver sensor when a vehicle is located on a flat road surface and is in a static state, so as to obtain a single-time transmission system backlash value # imgabs2 #; according to the method, the change of the backlash of the transmission system is represented by introducing the signal of the motor rotary transformer sensor, the comprehensive backlash value of the transmission system can be measured without external equipment and a measuring tool, the operation is convenient and fast, the method can be applied to software control, and the method is suitable for large-scale popularization and application. And therefore, the problem of vehicle jitter caused by backlash dispersion difference can be accurately optimized with better related control parameters.

Systems and methods for a secure cross-chain atomic swaps are disclosed herein. A user submits to a swap platform a signed limit order to atomically swap an amount of input token for an output token. The swap may involve a Dutch auction approach, in which the order execution price depends on time of inclusion in a block and decreases over the duration of the Dutch auction. The swap platform provides the order details to whitelisted resolvers to evaluate if / when / how to fill the order. Once a resolver makes that determination, it can utilize smart contracts associated with the swap platform to perform the atomic swap on behalf of the user and itself (e.g., without active involvement of the user). Input tokens deposited on an escrow contract are unlocked at the same time that output tokens deposited on another escrow contract are unlocked.

The utility model discloses a signal processing circuit and system, and relates to the technical field of signal processing, and the signal processing circuit comprises a timing comparator which is used for carrying out counting reset and signal comparison according to an edge event obtained by detecting a zero crossing point of an excitation signal, and outputting a periodic event signal and a sampling trigger signal; the interrupt controller is connected with the timing comparator and is used for outputting an interrupt trigger signal according to the periodic event signal; the AD converter is respectively connected with the timing comparator and the rotary transformer and is used for carrying out sine and cosine electric signal sampling on the rotary transformer according to the sampling trigger signal to obtain a sampling signal; and the microcontroller is respectively connected with the interrupt controller and the AD converter, and is used for carrying out peak value sampling according to the excitation signal and the sampling signal when receiving the interrupt trigger signal so as to extract and obtain an envelope signal. According to the method and the device, the effect of improving the accuracy of envelope signal extraction and the accuracy of subsequent rotor angle calculation is achieved.

The present invention involves in the technical field of resolver transformers, specifically in a motor-integrated resolver transformer simulation device and the simulation method thereof. The present invention obtains the current sinusoidal and cosinusoidal signals of a motor module through a resolver transformer module provided therein, and compare them with the excitation signals inputted by a motor controller, so as to determine whether the resolving circuit of the motor controller is faulty, and, by improving the brush device of the motor module, the service life of the motor module is increased and the testing cost is reduced.

The present invention relates to the technical field of vehicle motors. Disclosed are a motor rotor position correction method and an electronic device. The method comprises: acquiring a first signal and a second signal, wherein the first signal is a signal inputted by a resolver, and the second signal is a signal observed by an angle observer; on the basis of the first signal and the second signal, determining a feedforward correction function, wherein the feedforward correction function is used for carrying out feedforward correction on an output angle of a motor rotor position; and using the feedforward correction function to determine a correction angle of the motor rotor position. The present invention solves the technical problem in the prior art of poor motor control stability caused by a large error of a motor rotor position obtained by calculation.