240 results about "Resolver" patented technology

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 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.

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.

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.

Apparatus and associated methods relate to a transformer-less way of demodulating signals generated by a synchro-resolver so as to determine a shaft angle of the synchro-resolver. A first differential output voltage between a first pair of the wye-configured secondary windings is used to generate a first output. A second differential output voltage between a second pair of the wye-configured secondary windings, different from the first pair, is used to generate a second output. The first and second outputs are combined to form a signal quadrature to the first output. The first output and the signal quadrature thereto are used to determine the shaft angle.

The invention relates to the technical field of motor detection, in particular to dual-redundancy angle detection equipment with different working modes, which comprises a rotary transformer switching mechanism used for installing and switching working states of a rotary transformer transmitter assembly, the working states comprise a working position and a standby position, and the rotary transformer transmitter assembly is driven by the rotary transformer switching mechanism to rotate under the working position. The rotary transformer transmitter assembly detects the angle of a motor shaft through a transmission link. According to the invention, the rotary transformer transmitter and the variable differential transformer can be flexibly switched according to scenes, anti-electromagnetic interference, high-precision detection and double-mechanism cooperative verification are realized, and the working condition adaptability is improved.

The invention discloses a rotary transformer testing device and method. The rotary transformer testing device comprises a motor, a motor controller, a high-voltage direct-current power supply, an upper computer, an oscilloscope and low-voltage electrical performance testing equipment, the motor drives the rotary transformer rotor to rotate; the high-voltage direct-current end of the motor controller is connected with a high-voltage direct-current power supply, and the output end of the low-voltage electricity performance test equipment is connected with the low-voltage power supply end of the motor controller to generate a low-voltage interference signal or provide stable low-voltage electricity to be input to the motor controller; the communication ends of the motor controller, the high-voltage direct-current power supply and the low-voltage electrical performance test equipment are connected with the upper computer; the excitation end and the acquisition end of the motor controller are respectively connected with the input end and the output end of the resolver stator, and the motor controller provides excitation signals for the resolver stator and acquires induction signals fed back by the resolver stator; the acquisition end of the oscilloscope is connected with the input end and the output end of the rotary transformer stator, and the oscilloscope acquires and displays waveforms of excitation signals and induction signals. According to the invention, the accurate resolver condition can be obtained, and misjudgment can be avoided.

The application discloses a kind of accurate positioning method and device of robot joint, method includes: obtaining the first position signal of permanent magnet motor collected by resolver and the second position signal of permanent magnet motor collected by hall sensor, and first position signal and second position signal are respectively stored in the form of N-bit binary number;The low M bit of second position signal is used to the low M bit of first position signal is weighted replacement, obtain the motor weighted position signal after synthesis, in order to realize accurate positioning to robot joint, wherein, M < N.The application replaces the data of part of precision of resolver by part of high-precision data of hall sensor, obtains the motor weighted position signal after synthesis, to obtain accurate motor position signal, and then realize accurate positioning of robot joint.

The motor speed control device of the embodiment includes a rotational speed estimation unit and a control unit. The rotational speed estimation unit generates an estimated value of the rotational speed of the motor using a result of FFT analysis of a speed detection signal ωFBK obtained based on a detection result of a resolver that detects the rotational speed of the motor, and the speed detection signal ωFBK. The control unit performs speed control in such a manner that a deviation between a speed command value for the speed control of the motor and the estimated value of the rotational speed is reduced.

A resolver includes a stator having a stator body formed of a first plastic material and a cover covering a side of the stator. The cover has a cover body formed of a second plastic material. The first plastic material of the stator body is attached to the second plastic material of the cover body by a plastic weld.

The utility model discloses a three-phase plastic-coated structure and an electrical device, and relates to the technical field of power distribution structures, the three-phase plastic-coated structure comprises a plastic member, a three-phase copper bar, a rotary transformer sealing assembly and a fixing member, the plastic member is provided with a first mounting hole and at least three second mounting holes; any phase of copper bar of the three phases of copper bars is arranged in the corresponding second mounting hole; the rotary transformer sealing assembly is detachably arranged in the first mounting hole, the rotary transformer sealing assembly comprises a rotary transformer sealing seat and a rotary transformer wire harness arranged on the rotary transformer sealing seat, and the rotary transformer sealing seat and the hole wall of the first mounting hole are arranged in a sealing mode; the fixing part is connected with the plastic part and the rotary transformer sealing seat so as to fix the rotary transformer sealing seat on the plastic part; according to the technical scheme provided by the utility model, the cost of the plastic coating structure can be reduced, the assembly and maintenance efficiency can be improved, the installation reliability can be indirectly improved, and the service life of equipment can be indirectly prolonged.

Methods, systems, and apparatuses for real-time synchronization techniques for rectification of resolver feedbacks are provided. Various embodiments of the present disclosure include generating a synchronized rectification sign signal in real-time, aligned to an external delay, using a sign of modulated feedback waves. Various embodiments may include a process for reconstructing the sign by dynamically selecting the larger signal (in absolute value) of at least one sine signal and at least one cosine signal.

A vehicle control method and apparatus, relating to the field of electric vehicles, describes a method that, under engine idling speed, uses the speed signal collected by the generator resolver, combined with the engine ignition advance angle and the generator resolver angle, to determine the correspondence between the engine crankshaft angle and the generator resolver, generating a generator compensation torque phase waveform, and calculating the generator compensation torque based on the phase offset according to the delay calibration. Furthermore, with engine torque and generator speed fluctuations as the target, the generator compensation torque is adaptively optimized to obtain the final generator compensation torque. By applying the final compensation torque to the generator, the speed pulsation caused by the removal of the engine flywheel and torsional damper can be effectively reduced, thereby improving the overall vehicle NVH performance.

The invention relates to the technical field of electromagnetic induction type encoding, in particular to an electromagnetic induction type encoder which comprises a shell, a rotating shaft, a first bearing, a rotor, a stator, a resolving plate and a compensation assembly. The rotating shaft is installed on the inner side of the shell, the first bearing is connected to the upper end of the rotating shaft, and the rotor, the stator and the resolving plate are sequentially connected to the lower side of the first bearing; the compensation assembly comprises a compensation coil, an electric push rod, a second bearing, a shaft rod, a shaft sleeve and a signal processing module, the shaft rod is installed on the inner side of the lower end of the shell, the shaft sleeve is installed on the outer side of the shaft rod and connected with the stator, and the second bearing is installed on the outer side of the shaft sleeve. The signal processing module and the compensation coil are sequentially installed at the lower end of the rotating shaft, the current in the compensation coil can be changed when the vertical distance between the compensation coil and the stator inner coil changes, and the signal processing module drives the electric push rod to push the shaft sleeve to keep the vertical distance between the stator and the compensation coil constant according to the current change.

This invention relates to a modular rolling mill health status monitoring system, belonging to the field of metallurgical machinery equipment monitoring. It includes a rolling mill body, a weighing module, and a monitoring module. The rolling mill body consists of a work base, rolls, and bearings. The weighing module is located below the work base, and the monitoring module is located at the rolls. The weighing module includes a base plate, which is connected to a collection trough via a pressure sensor. A connecting rod is connected to the side wall of the base plate and is connected to the bottom of the work base. The pressure sensor signal is connected to a controller, and the controller signal is connected to a display module. The monitoring module includes a resolver sensor and a vibration sensor, both connected inside the rolls and connected to the controller signal. This invention acquires digital signals by monitoring the condition of the rolls and bearings, enabling the detection of the rolling mill's health status and simultaneous monitoring of multiple parameters. This provides a basis for predicting the remaining service life of the rolling mill, saving resources and time costs.

The application relates to an angle of attack sensing system and method for self-identifying angle of attack angle deviation, comprising: an angle of attack sensor, comprising: a vane with a shaft coupling, used for sensing the airflow direction and rotating with a wind vane; first and second resolvers, the rotors of the first and second resolvers are driven to rotate with the shaft of the vane through the meshing of driving and driven gears; a third resolver, the rotor of the third resolver is fastened with the shaft of the vane through the shaft coupling; and a processing control module, configured to identify the angle of attack deviation based on the real angle of attack calculation criterion according to the comparison result between the output angles of the respective resolvers, and calculate the corresponding real angle of attack.

The application relates to the technical field of sensors, in particular to a resolver VADC sampling signal processing method and model, which are used to solve the problem that the accuracy of signal processing, especially in the timing aspect, cannot be guaranteed for how the VADC method samples and processes data. The application sets the sampling trigger time of the VADC, the execution of the sampling interrupt task trigger and the initial position of the DMA carrying redirection, so that the timing of the three is kept consistent, thereby guaranteeing the accuracy of the angle and the rotational speed signal calculated therefrom and the accuracy of the torque estimation.

Electric powertrain 1, comprising an oil-cooled electric machine 10 whose wound rotor 12 constructed on a tubular base 12a externally carries a stack of laminations and windings 12c and internally accommodates a torque-sharing differential mechanism 20 comprising a two-part housing 21, 22 containing a spherical differential mechanism with two or four satellites 24 and two planetary gears 23 called tail gears, extending axially, and at the end of which is cut a helical toothing 23c driving the satellites 42 of a reducer 40a, 40b lubricated by oil according to a network common to the cooling of the electric machine 10, characterized in that the parts 21, 22 of the housing, integral in rotation with the wound rotor 12 have axial extensions 21a, 22a, one carries a bearing 35 for guiding the wound rotor 12 in the casing 50 as well as the rotor of the resolver 37,and the other a bearing 35 for guiding the wound rotor 12 in the cover 51 as well as the current supply device 100 of the wound rotor 12 consisting of a fixed element 130 in rotation, connected to an external electric current supply, of two support elements 110 and complementary 120 driven in rotation by the rotor, connected to the coils 12c of the latter and of two intercalated transmitter discs 150a, 150b ensuring the transmission of the current from the fixed element 130 in rotation to the support elements 110 and complementary 120 rotating. Figure for the abstract: Fig.5,

The invention discloses an automatic bandwidth adjustment system and a rotary transformer digital converter, and relates to the technical field of rotary transformer digital converters, and the system comprises an angle error calculation module, a tracking loop module and an automatic bandwidth adjustment module. The angle error calculation module is used for outputting a first angle error signal and a second angle error signal to the tracking loop module and the automatic bandwidth adjustment module; the tracking loop module is used for receiving the first angle error signal, performing phase tracking on the sine and cosine signals to obtain a second speed signal and a rotating phase signal, and sending the second speed signal to the automatic bandwidth adjusting module; the automatic bandwidth adjusting module is used for comparing the second angle error signal with a preset angle threshold value to obtain a first comparison signal, comparing the second speed signal with a preset speed threshold value to obtain a second comparison signal, and sending the first comparison signal and the second comparison signal to the tracking loop module. Therefore, different system bandwidth coefficients can be switched.

The purpose of the present invention is to improve the cooling structure of a rotating machine. A rotating machine according to the present invention comprises: a resolver that measures the rotation angle of a rotor; a resolver chamber that accommodates the resolver at one side in the axial direction of a shaft; a guide part that guides a refrigerant to the resolver chamber; a frame that accommodates a stator and the rotor; and a bracket arranged on one side of the frame in the axial direction. The shaft comprises: a hollow section that extends from an opening section that is open at one side in the axial direction to the other side in the axial direction; and a refrigerant oil passage that penetrates through the shaft from the hollow section to the outside in the radial direction. The shaft is pivotally supported by the bracket via a bearing. The opening section is in communication with the resolver chamber. One end of the shaft in the axial direction penetrates through the bracket from the other side in the axial direction to the one side in the axial direction. The resolver chamber is a space at one side of the bracket in the axial direction. An opening in one side of the resolver chamber in the axial direction is blocked by a sensor cover. Additionally, the guide part includes a through-hole that penetrates through the bracket from the other side in the axial direction to the one side in the axial direction.

The utility model provides a demodulator, a synchro and a synchro nonlinear compensation system, and relates to the technical field of synchro, the demodulator comprises a synchro synchronous digital solver, a processor and an input and output module, the demodulator is used for being electrically connected with the synchro, and the synchro nonlinear compensation system is used for being electrically connected with the synchro. Comprising a nonlinear compensation parameter acquisition system and the demodulator, and the nonlinear compensation parameter acquisition system comprises a high-precision index plate, a rotary driving module, a reading module and a storage module. By using the selsyn nonlinear compensation system, different selsyn nonlinear compensation data packets can be obtained, when the selsyn is used, only the corresponding nonlinear compensation data packets need to be used, and the data of the selsyn is subjected to nonlinear compensation by depending on a selsyn synchronous digital resolver and a processor in a demodulator, so that the non-linear compensation of the selsyn is realized. And data with higher precision and stability can be obtained.

A stator of a resolver includes a body having a pole, a connector interface disposed in a portion of the body and including a terminal having a wire termination at a termination end, and a wire disposed around the pole and extending to the termination end of the terminal. The terminal has a bent section at the termination end that is bent to a bending angle greater than 0° and less than or equal to 90° with respect to a main section of the terminal. The wire is electrically and mechanically connected with the terminal at the wire termination. The bent section of the terminal forms a slackened portion of the wire adjacent to the wire termination.

A hybrid vehicle and a method for controlling there same, includes a motor provided with a resolver configured for detecting a first rotation angle of the motor, and connected to a crankshaft of an engine through a predetermined connecting means; a rotation angle sensor configured for detecting a second rotation angle of the engine; and a control unit electrically connected to the rotation angle sensor and configured to determine whether a failure has occurred in the rotation angle sensor, and determine a first rotation angle corresponding to a specific crank position based on a relationship of a previously obtained first rotation angle and the second rotation angle, and a rotation number of the motor when the control unit concludes that the failure has occurred in the rotation angle sensor.

The invention discloses a rotary transformer zero calibration method and device of a vehicle motor, electronic equipment, a medium and a product. The method comprises the following steps: carrying out first periodic modulation on the switch duty ratio of a three-phase bridge arm of a vehicle motor; when the modulation is completed, obtaining a first mechanical angle offset of the motor rotor; performing second periodic modulation on the switch duty ratio of the three-phase bridge arm of the vehicle motor by adopting an opposite U-phase tube state modulation strategy; when the modulation is completed, obtaining a second mechanical angle offset of the motor rotor; when the second mechanical angle offset is smaller than a preset angle threshold value, the initial rotary zero position of the motor rotor is determined according to the first mechanical angle offset and the second mechanical angle offset; and correcting the initial resolver zero position to obtain a calibrated target resolver zero position. The method can solve the problems of low efficiency, occupation of controller resources and noise caused by dependence on an external power source or high-frequency current scanning when motor resolver zero calibration is carried out in a vehicle static state.

The present invention provides an electric motor allowing stable drive control to be performed even when, in multipole motors, a resolver is used in a position sensor and combinations are realized in which the pole number ratio between the number of poles in the electric motor and the number of poles in the resolver is an indivisible non-integer multiple. This electric motor is characterized in that: said electric motor comprises an electric motor body, a position sensor that detects the position of a rotor of the electric motor body, and a control device that controls driving of the electric motor body; the control device includes a vector control unit that calculates a voltage command value on the basis of information on current flowing in the electric motor body and information on the position of the rotor detected by the position sensor, and an electrical angle phase calculation unit that calculates the electrical angle phase of the electric motor body; the electrical angle phase conversion unit includes an electrical angle conversion unit that converts sensor phase information, which is phase information for the motor body as acquired from the position sensor, into electrical angle phase information, which is phase information for the electrical angle of the rotor, in accordance with the pole number ratio, which is the ratio of the number of rotor poles, which is the number of poles of the rotor, and the number of position sensor poles, which is the number of poles of the position sensor, and outputs the electrical angle phase information, a rotor phase estimation unit that estimates the phase information of the electrical angle of the rotor and outputs the resulting estimate as a position estimation result, a phase correction amount calculation unit that calculates a phase correction amount according to the sensor phase information and the position estimation result, and a phase correction amount addition unit that generates corrected electrical angle phase information according to the value obtained by adding the phase correction amount to the electrical angle phase information; and the phase correction amount calculation unit calculates an initial phase correction amount according to the position estimation result for when the position sensor outputs 0-degree-phase information as the sensor phase information, calculates, once the initial phase correction amount has been calculated, a correction unit amount whereby 1 is added when the sensor phase information outputted by the phase sensor when the initial value is 0 has changed from 360 degrees to 0 degrees and 1 is subtracted when the sensor phase information outputted by the phase sensor when the initial value is 0 has changed from 0 degrees to 360 degrees, calculates a unit correction amount, which is the value obtained by multiplying the pole number ratio decimal value by 360 degrees, said pole number ratio decimal value being the value of the pole number ratio after the decimal point, and calculates as the phase correction amount a value obtained by multiplying the unit correction amount by the correction unit number and adding the resulting product to the initial phase correction amount.

The invention discloses a servo system for a ship towing winch and a control method of the servo system. The servo system comprises a rectifying circuit, a three-phase full-bridge circuit, a braking circuit, a DSP control circuit, an output capacitor C, a brake control circuit and a rotary transformer decoding circuit. According to the servo driver, full electrification of releasing, recycling and zero-speed working condition maintaining of the ship winch is achieved, compared with a hydraulic driving device of a traditional winch, the defects that a hydraulic system is complex in structure, large in size and difficult to maintain are overcome, and an electric driving system is high in control precision, simpler to achieve and more convenient to operate. Compared with conventional alternating-current variable-frequency electric drive of an existing winch, servo drive is more suitable for the low-speed large-torque working condition, efficiency is higher, and cooperation of a PLC is not needed. Compared with a traditional speed loop and current loop control method, the control method for four-quadrant operation of the servo driver enables the winch to have an energy consumption braking function, and meanwhile the safety of the towing winch under the extreme working condition is guaranteed by being matched with a brake of the motor.

The invention provides a multi-mode dynamic elastic defense method for an industrial control system, and belongs to the field of industrial control information security, and the method comprises the steps: calculating an environment weight based on a traffic anomaly index and a key updating frequency, and triggering a heterogeneous execution body to dynamically switch to adapt to a system security state when the weight exceeds a threshold value; detecting the output deviation of the executor through a multi-mode resolver, and executing network parameter randomization and executor regrouping to block attack diffusion when the deviation exceeds a threshold value; a semantic model is adopted to compress a defense action space, and a high-score defense action is preferentially selected in combination with an elastic scoring mechanism; the relevance between a register instruction and sensor data is analyzed, the abnormal probability is calculated through Bayesian verification, when the abnormal probability exceeds a threshold value, a risk instruction is intercepted, a redundancy control channel is started, and dual protection is formed to cope with physical domain attacks. According to the technical scheme, the problems of protocol vulnerability sensing lag, attack chain defense splitting, physical layer response stiffness and the like in the prior art are solved.

The invention discloses a high-power-density motor controller for a low-altitude aircraft. The high-power-density motor controller comprises a heterogeneous master control system (FPGA and DSP), a power driving circuit, a signal sampling circuit and a rotary transformer decoding system. The FPGA and the DSP are connected through an XINTF parallel interface, and the FPGA is responsible for hard real-time tasks including control of multichannel synchronous ADC sampling, generation of PWM signals and processing of pulse width modulation signals of a temperature sensor; the DSP is responsible for complex calculation tasks including motor vector control algorithm resolving, communication with a rotary transformer decoding chip through an SPI interface and operation of a position-sensorless observer to obtain redundant position signals. The power drive circuit adopts a silicon carbide power device, PWM signals and state feedback between the control board and the drive board are transmitted through a bidirectional 422 differential chip, and the drive board is integrated with a hardware short circuit and under-voltage protection circuit. According to the method, the problems of real-time performance, reliability and safety of motor control under high switching frequency are solved, and the power density and system robustness of the controller are remarkably improved.

To provide a highly reliable electronic control device in which an excitation amplifier that outputs an excitation signal to a resolver, a microcomputer, and a power supply IC are mounted, the electronic control device being capable of performing abnormality diagnosis of the excitation amplifier before activation and during operation of a system. An electronic control device includes a power supply IC; a microcomputer to which a power supply voltage is supplied from the power supply IC; an excitation amplifier that excites the resolver; and a diagnostic circuit that monitors an input signal and an output signal of the excitation amplifier and diagnoses abnormality; where the diagnostic circuit compares the input signal with the output signal to perform abnormality diagnosis of the excitation amplifier, and transmits a diagnosis result to the microcomputer.