142 results about "Resolver" patented technology

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 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 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.

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.

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 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 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 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.

The application relates to a resolver signal processing method and device, a vehicle and a storage medium, and relates to the technical field of computers. The method comprises the following steps: obtaining a resolver signal to be detected of a resolver of a motor; the resolver signal is used for representing a rotation angle of a rotor of the motor; performing signal processing on the resolver signal to obtain linearity of the rotation angle and harmonic content of the resolver signal; determining whether the resolver signal is abnormal based on the linearity, and adjusting parameters of a motor system based on the harmonic content in the case that the resolver signal is abnormal; wherein the parameters of the motor system comprise one or more of an electrical parameter of the resolver, a mechanical parameter of the resolver and a mechanical parameter of the motor system. Therefore, the linearity and the harmonic content can assist in guiding the design and improvement of the resolver of the motor, and the quality of the resolver signal is improved. The resolver signal abnormality is identified in time during initial design of the motor, and repeated adaptive design of the resolver in the motor is avoided.

This invention belongs to the field of motor control technology and discloses a dual-motor cooperative control driver and control method based on vector control. Through a built-in parallel two-level cross-coupling synchronous control strategy, the speed loop and clamping force loop are set up in parallel. A cross-compensation algorithm is executed so that the control setpoint of each motor is simultaneously adjusted by its own and the other motor's speed and clamping force errors, achieving adaptive weight adjustment logic to achieve multi-variable cooperation. The driver integrates a force feedback interface, which can be directly connected to a force sensor to form a clamping force-torque composite closed-loop control mode, realizing high-quality closed-loop control from command to output, improving the system's intelligence and control accuracy. The modular hardware design, combined with CAN communication and analog signal acquisition, enhances configuration flexibility and system integration convenience. Precise feedback from the resolver decoding module and current sampling module, and the driving of the three-phase full-bridge drive module, ensure high efficiency from signal sensing to power output.

The invention discloses a rotary transformer adaptive decoding method and device, and the method comprises the steps: obtaining a sampling modulation signal inputted by an analog-to-digital converter, carrying out the phase comparison of the sampling modulation signal and a periodic triangular wave generated according to a configuration parameter, and outputting a starting signal based on a phase comparison result, so as to carry out the signal sampling time sequence control of the analog-to-digital converter; and converting the sampling modulation signal, generating a sine wave signal by combining with the periodic triangular wave, outputting the sine wave signal, integrating and decoding the converted signal to obtain a decoded signal, and outputting the decoded signal. The rotary transformer self-adaptive decoding method can be suitable for winding type and magnetic resistance type rotary transformers, any phase difference is allowed to exist between the excitation winding and the feedback winding of the rotary transformer, and transmission cables with any length are allowed to be used for connecting equipment; the universality of the decoding method of the rotary transformer is greatly improved by widening the decoding application range.

To provide a control device of an internal combustion engine capable of restraining a variation in combustion pressure between cylinders.SOLUTION: A control device for a multi-cylinder engine capable of individually controlling an ignition timing and a fuel injection amount, the control device comprising: a generator configured to generate a reaction torque corresponding to a torque transmitted from the engine; and a resolver configured to detect a rotation angle of the generator, A combustion pressure of each of the cylinders is estimated according to a change in a rotation angle of the power generator detected by a resolver (step S3), a combustion pressure difference between the estimated combustion pressure and an ideal combustion pressure is calculated for each of the cylinders (step S4), and when all the combustion pressure differences are not within a predetermined range, ignition timings or fuel injection amounts of all the cylinders are uniformly corrected, and when any one of the combustion pressure differences is not within the predetermined range, ignition timings or fuel injection amounts of the cylinders having the combustion pressure difference that is not within the predetermined range are individually corrected (steps S8 and S10).SELECTED DRAWING: Figure 2

The utility model relates to the technical field of intelligent resolvers, in particular to an intelligent resolver for recognizing documents, which comprises a bottom plate, a guide rail fixedly connected onto the bottom plate, a sliding sleeve slidably connected onto the guide rail, a vertical frame fixedly connected onto the sliding sleeve, a slider slidably connected inside the vertical frame, a sliding rail fixedly connected onto the slider, and a sliding rod fixedly connected onto the sliding rail. A mounting sleeve is slidably connected to the sliding rail, a rotating seat is mounted on the mounting sleeve through an adjusting structure, a visual camera is mounted on the rotating seat through a mounting structure, an inserting groove is formed in the rotating seat, an inserting block is fixedly connected to the visual camera, the inserting block is connected with the inserting groove in an inserted mode, two shifting blocks are symmetrically slidably connected to the rotating seat, and clamping blocks are fixedly connected to the shifting blocks. Two clamping grooves are symmetrically formed in the inserting block, the clamping blocks are clamped with the clamping grooves, a guide rod is fixedly connected to the interior of the rotating base, the guide rod is sleeved with a second spring, and the two ends of the second spring are fixedly connected with the shifting block and the rotating base respectively; the visual camera can be quickly mounted through the mounting structure, and the mounting and dismounting efficiency of the visual camera is improved.

A resolver includes excitation coils and a detection coil. One of the excitation coils and the detection coil includes a sine coil and a cosine coil that transmit AC signals having phases of the electrical angle different from each other by 90 degrees. Further, the other coil is provided with an annular magnetic pole group in which a plurality of magnetic poles is disposed adjacent to each other in the circumferential direction at a facing face at which the rotor and the stator face each other. The plurality of sine coils and the plurality of the cosine coils are alternately disposed adjacent to each other in the circumferential direction at the facing face. The circumferential intervals between the magnetic poles included in the excitation coils and the detection coil are identical.

In some examples, a method includes applying a bias voltage to a resolver system. The method also includes receiving a sensed signal, the sensed signal varying in value based on a position of a rotary element. The method also includes attenuating the sensed signal to form an attenuated signal. The method also includes performing fault detection on the attenuated signal to detect faults in the resolver system. The method also includes processing the attenuated signal to determine the position of the rotary element.

The present application relates to the field of permanent magnet synchronous motor, specifically a kind of PMSM model predictive control system position sensor fault online diagnosis and compensation method;The basic principle of PMSM model predictive current control system is analyzed, the position deviation caused by the unbalance of resolver amplitude and the imperfect fault of quadrature is analyzed, and the fault characteristics presented in d, q axis stator current, and an effective extraction method based on the fault characteristics of stator q axis current is proposed, and then fault-tolerant control is realized based on the obtained position deviation;The present application is through the position sensor fault diagnosis method of PMSM model predictive current control system, and through the adaptive signal extraction method of the double-frequency fault characteristic current adopted;Through fault mode positioning, identification and fault degree evaluation, the online diagnosis of position sensor fault is realized, and the influence of the q-axis current ripple caused by the inverter dead-time effect on the position sensor fault diagnosis accuracy is avoided.

This specification discloses a motor position detection system, comprising: an eddy current module for outputting eddy current data of the motor; a resolver module for outputting resolver data of the motor; a photoelectric module for outputting photoelectric data of the motor; a data processing module for obtaining an initial position result based on the eddy current data, obtaining a position calibration result based on the resolver data and the photoelectric data; calculating the residual between the position calibration result and the initial position result, determining the cumulative error of the eddy current data based on the residual, correcting the eddy current data using the cumulative error; and obtaining a motor position detection result based on the resolver data, the photoelectric data, and the corrected eddy current data.

The invention provides a soft decoding device for a rotary transformer, which is used for resolving the position of a rotor of the rotary transformer and comprises a controller, an amplifying and filtering processing circuit, a first differential amplifying and biasing circuit and a second differential amplifying and biasing circuit, the controller generates an SPWM (sinusoidal pulse width modulation) signal and sends the SPWM signal to the amplifying and filtering processing circuit; the amplifying and filtering processing circuit amplifies and filters the SPWM signal to generate an excitation signal, the rotary transformer receives the excitation signal to generate a sinusoidal signal and a cosine signal, the sinusoidal signal is processed by the first differential amplifying and biasing circuit to generate a sinusoidal sampling signal, and the sinusoidal sampling signal is sent to the controller; the cosine signal is processed by the second differential amplification biasing circuit to generate a cosine sampling signal and then the cosine sampling signal is sent to the controller, and the controller receives and processes the sine sampling signal and the cosine sampling signal so as to solve the rotor position of the rotary transformer. According to the invention, a complex calculation process is avoided, and the technical effects of saving cost and improving the signal-to-noise ratio and the calculation speed are achieved.

The invention provides a differential lock control method and device, electronic equipment and a storage medium, and relates to the technical field of vehicles. The differential lock control method is applied to a motor controller integrated with a differential lock driving module and comprises the steps that the rotating speed of a motor is obtained through a rotary transformer sensor of the motor controller, and the vehicle speed is determined according to the rotating speed of the motor; and when the vehicle speed meets the preset speed threshold value and the motor controller is in the normal operation state, the differential lock is controlled to be unlocked through the differential lock driving module. According to the invention, the risk of vehicle speed misjudgment caused by communication link interference, poor wiring harness contact or CAN / LIN data abnormity is effectively reduced, the product cost can be reduced, meanwhile, the differential lock is ensured not to be in a locked state under a high-speed working condition, and the safety and reliability of a vehicle in a high-speed driving process are remarkably improved.

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

The invention provides a signal processing method, system and equipment for a rotary transformer, and the method comprises the steps: selecting one of a sine signal and a cosine signal as a comparison signal based on the synchronous sampling of the sine signal, the cosine signal and an excitation signal, the corresponding zero-point timestamps of the excitation signal and the contrast signal in the sampling space are obtained through an algorithm, then the phase delay time of the sine / cosine signal relative to the excitation signal is obtained, and finally the sine / cosine signal is dynamically adjusted according to the obtained phase delay time to improve or eliminate the phase delay. According to the technical scheme provided by the invention, other hardware or equipment does not need to be introduced, phase delay acquisition of the sine / cosine signal relative to the excitation signal can be realized no matter how the rotor position of the rotary transformer is, dispersion errors of a rotary transformer sensor and hardware components thereof can be compensated, the acquired phase delay time is high in precision, and the accuracy of the phase delay is high. And the acquisition mode is convenient to execute and has a promotable value.

In a 1X speed 2N-phase VR resolver, 2N coil-poles are evenly distributed around the stator, N being an integer not smaller than three. A primary coil and sine and cosine signal sensing coils are wound at each coil-pole. All primary coils are wound with the same number of turns, with their winding polarities alternating across the coil-poles. The number of turns and winding polarities for the sine and cosine signal sensing coils at the coil-pole position n (1≤n≤2N) are determined by the sine and cosine synthesis coefficients at position n of the 2N-phase cosine-ZF transform. The coil turns ratios between the sine and cosine signal sensing coils relative to the primary coil are determined by the absolute values of the coefficients, whereas the winding polarities are dictated by signs of the synthesis coefficients and directions of the corresponding primary coils. Considering the sensitivity to misalignment and eccentricity associated with a 1X sinusoidal rotor lobe, a 1X quasi-square-waveform rotor lobe provides a more practical and advantageous alternative.

A motor includes a housing including a housing base and a housing shaft portion provided to the housing base and extending in a direction along a rotation center axis, a motor stator arranged radially outward of the housing shaft portion, a motor rotor provided between the motor stator and the housing shaft portion, a bearing provided radially inward of the motor rotor and rotatably supporting the motor rotor to the housing shaft portion, a seal structure provided in an axial direction of the motor rotor on an opposite side to the housing base and sealing between the motor rotor and the housing shaft portion, and a resolver detecting rotation of the motor rotor, the resolver being arranged in the axial direction on the opposite side to the housing base with respect to the motor stator radially outward of the bearing and in the direction along the rotation center axis.