531 results about "Rotary transformer" patented technology

The embodiment of the invention discloses a fault diagnosis device of a permanent magnet synchronous motor driving system for an electric fuel pump, which is arranged in the permanent magnet synchronous motor driving system and comprises a three-phase voltage and current monitoring module connected to the output end of a permanent magnet synchronous motor, the motor rotating speed acquisition module is arranged on a rotor of the permanent magnet synchronous motor; the permanent magnet synchronous motor turn-to-turn short circuit fault diagnosis module, the permanent magnet synchronous motor uniform demagnetization fault diagnosis module, the permanent magnet synchronous motor local demagnetization fault diagnosis module, the inverter single-tube fault diagnosis module and the rotary transformer fault diagnosis module are arranged in the motor controller. The permanent magnet synchronous motor driving system provided with the fault diagnosis device provided by the embodiment of the invention has diagnosis capability, can realize online calculation and is rapid in diagnosis, so that the fault can be found in time, and technical support is provided for further eliminating the fault hidden danger in the subsequent process.

The invention relates to the technical field of reciprocation pump control, in particular to a closed-loop control motor-driven ball screw reciprocation pump and a control method, and the closed-loop control motor-driven ball screw reciprocation pump is mainly characterized in that an outlet of a fluid end module is connected with a pressure sensor; the pressure sensor, the motor controller, the rotary transformer and the position sensor are electrically connected with the central controller, the central controller is used for outputting a control signal enabling the driving motor to rotate to the motor controller, and the motor controller is used for controlling the driving motor to operate. According to the scheme, a brake is removed, the defects caused by the brake are avoided, in the prior art, no matter whether a brake pad is abraded or the inertia problem of the brake exists, a brake system cannot be achieved in the industry of the reciprocating pump at all, and in the reciprocating pump, the brake pad is not abraded. The speed, the position and the thrust of the reciprocating pump device are accurately controlled in a full-digital manner through the central controller, so that the ball screw reciprocating pump with the structure achieves the purpose of industrial use in the industry.

According to the technical scheme, the underwater rotary hydraulic proportional valve is characterized in that the underwater rotary hydraulic proportional valve comprises a valve body, a steel sleeve, a shell, a coil, a magnet yoke, a stator iron core, an inner end cover, a sealing ring a, a dustproof screw, a sealing ring b, a rotary transformer, a permanent magnet, a sealing ring c, a valve sleeve, a valve element, a bearing and a sealing ring d, and is characterized in that a plurality of hydraulic oil ports are formed in the valve body; the hydraulic oil port is communicated with the oil port through the multiple valve cavities, the shell is installed at one end of the valve body, a driving cavity is formed in the shell, and the valve element and a rotating shaft of the motor are integrated. The wet-type limited angle torque motor is adopted to drive the rotary valve and the valve element to rotate, a motion conversion device is omitted, the valve element and the valve sleeve rotate relatively, friction force is small, the anti-pollution capacity is high, the axial leakage problem does not exist, a motor shaft of the limited angle torque motor can rotate within a limited angle range, and the advantages of being convenient to control, large in torque density, high in reliability and the like are achieved. And the method is simple and reliable.

The invention belongs to the field of synchronous motor rotor position signal acquisition and processing, and particularly relates to a resolver angle compensation method which can improve the motor rotor position signal detection precision. The method comprises the following steps: step 1, acquiring rotary power transformation angle values of n periods; 2, determining an error array of n periods according to the electrical angle value of each period; step 3, performing interpolation calculation on the error array of n periods to obtain a 2-degree error distribution array; and 4, compensating the real-time sampling rotary power transformation angle according to the 2-degree error distribution array.

The invention relates to the technical field of motors, in particular to a double-drive coaxial motor which comprises a main drive motor, an auxiliary drive motor and a motor shell, the main drive motor is arranged at the front end of the motor shell, and the auxiliary drive motor is arranged at the rear end of the motor shell. The main driving motor and the auxiliary driving motor are coaxially connected through a main shaft and synchronously output power; the two ends of the motor shell are connected with a front end cover and a rear end cover respectively, the front end cover is provided with a main drive motor rotary transformer device, and the rear end cover is provided with an auxiliary drive motor rotary transformer device. Through the coaxial integrated design of the main drive motor and the auxiliary drive motor, dual-power superposition output is achieved under the same size, the torque and power density are remarkably improved, the main drive motor and the auxiliary drive motor share the same shell, rotating shaft and cooling system, the overall size and weight are greatly reduced, and the problem of space occupation of a traditional split type dual-motor system is solved.

The invention discloses a detection method of a vehicle transmission system, electronic equipment and a storage medium. The method comprises the steps that in response to a detection instruction for a vehicle transmission system, torques in different directions are applied to a motor in the vehicle transmission system on the basis of preset torque parameters, resolver signal values of the motor in different directions are obtained, and the resolver signal values are used for representing electric signal values output by a rotation position sensor of the motor; the rotation position sensor is used for monitoring position information of a rotor of the motor relative to a stator. Determining a transmission system gap of the motor based on the rotary transformer signal values in different directions; and detecting the vehicle transmission system based on the transmission system clearance to obtain a detection result. The technical problem of low detection accuracy of the vehicle transmission system in the prior art is solved.

A driving circuit board of a vector control permanent magnet synchronous motor controller comprises a microprocessor integrated with an FOC algorithm; a bus voltage acquisition unit; a current acquisition unit; a rotary transformer, Hall and photoelectric speed sensor signal acquisition unit; a man-machine interaction unit; a six-path PWM driving unit; the connector is connected with a reliable monitoring unit. The driving circuit board provided by the utility model can be matched with three-phase full-bridge inversion power circuit boards with different power levels to quickly form a permanent magnet synchronous motor controller with different power levels. According to the utility model, the microprocessor is adopted to acquire various feedback signals such as speed, current, temperature, fault and the like and generate six paths of PWM driving waveforms, various types of speed acquisition units and communication units are integrated, the compatibility is better, the connector is added to connect the reliable monitoring unit, the safety is better, and the man-machine interaction unit is combined, so that control parameters can be adjusted, and the cost is reduced. And the permanent magnet synchronous motor supports various powers, voltages and electrical parameters.

The invention discloses an airborne infrared radiation characteristic measurement pod device. The airborne infrared radiation characteristic measurement pod device comprises a detection unit, a control unit and a servo platform, the detection unit and the control unit are mechanically connected with the servo platform through screws; the detection unit and the control unit are electrically connected with the servo platform through a connector; the detection unit comprises a visible light panchromatic camera, a medium-wave thermal infrared imager, a long-wave thermal infrared imager, a laser range finder and an atmospheric corrector; the control unit comprises a main control assembly, an air pressure control assembly, a temperature control assembly, a black body assembly, a POS assembly and a power supply assembly. The servo platform comprises a shell, an azimuth frame, a pitching frame, a damping assembly, a direct-current brushless torque motor, a rotary transformer and an encoder. The device is suitable for being installed on platforms such as manned aerial vehicles or unmanned aerial vehicles of rotor wings and fixed wings, visible light panchromatic imaging, medium-long wave infrared imaging and temperature measurement of targets in an area can be achieved, and meanwhile distance parameters and atmosphere parameter information on a transmission path are collected.

The invention relates to a system (10) for de-icing the blades (14) of the propeller (12) of an aircraft, the system comprising an H-bridge inverter device (40); a rotary transformer (22) comprising a main primary winding (26), a primary measurement winding (28), and a secondary circuit (30) delivering a secondary alternating voltage (Vs); a rectifier device (50); a de-icing device (20); a control device (60) configured to control the switching elements of the inverter device in an out-of-phase manner, using the value of the voltage (Vpm) across the terminals of the primary measurement winding, measured during a measurement interval of predetermined duration starting at the instant (t11,t33) when the inverter device switches from a controlled state to a short-circuit state.

The invention relates to the technical field of data transmission, and discloses a rotary transformer non-contact energy and data dual-channel transmission method, which comprises the following steps: identifying an energy component and a data component of a high-frequency pulse signal, separating an energy transmission frequency band from a data transmission frequency band, and embedding a coding sequence; based on a thermal compensation mechanism, the expansion amount of the compensation structure and the main structure change synchronously; establishing a dual-channel control mechanism based on the energy transmission frequency band and the data transmission frequency band to avoid interference frequency and perform waveform reconstruction; configuring a frequency band distribution mechanism to enable the energy transmission performance and the data anti-interference capability to form a complementary relationship in a frequency domain; based on the synergistic effect of a thermal compensation mechanism and the frequency band distribution mechanism, the influence of deformation on frequency band isolation is counteracted, and signal interference is eliminated through frequency point avoidance and processing based on the coding sequence, so that the energy transmission efficiency and the data fidelity are optimized. According to the invention, the data transmission reliability can be improved under extreme working conditions.

The invention relates to a rotary transformer 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: acquiring a to-be-detected rotary transformer signal of a rotary transformer of a motor; the rotary transformer signal is used for representing the rotation angle of the motor rotor; performing signal processing on the resolver signal to obtain the linearity of the rotation angle and the harmonic content of the resolver signal; determining whether the resolver signal is abnormal or not based on the linearity, and adjusting parameters of the motor system based on the harmonic content under the condition that the resolver signal is abnormal; wherein the parameters of the motor system comprise one or more of the electrical parameters of the rotary transformer, the mechanical parameters of the rotary transformer and the mechanical parameters of the motor system. Therefore, the design and improvement of the rotary transformer of the motor can be assisted and guided based on the linearity and the harmonic content, and the quality of the rotary transformer signal is improved. The rotary transformer signal abnormity is identified in time during the initial design of the motor, and the repeated adaptive design of the rotary transformer in the motor is avoided.

A vehicle's electrified powertrain includes a battery pack linked to a traction power inverter module (TPIM) converting DC voltage from the battery pack into AC voltage. A rotary electric machine includes a stator energized by the TPIM's AC voltage, enclosing a rotor core capable of rotation. The rotor core contains slots holding conductive bars and permanent magnets, with conductive bars positioned closer to the rotor core's center. The conductive bars and permanent magnets are separated by gaps within each slot. An annular end ring assembly is present at one end of the rotor core, featuring terminal conductors connected to subsets of conductive bars and a secondary coil of a rotary transformer. When the stator is energized, the rotor shaft, connected to the rotor, rotates. The electric machine powers a transmission, which is coupled to the rotor shaft.

Disclosed are a non-contact rotary transformer and a motor comprising same. A non-contact rotary transformer according to the present invention is a device for connecting a rotor of a motor with an external power source in a non-contact manner, and is characterized by comprising: a core part disposed inside a hollow motor shaft in a coaxial structure with the motor shaft; a primary coil part installed on the outer circumferential surface of the core part; a secondary coil part which is installed on an inner main surface of the motor shaft and surrounds the primary coil part at a predetermined interval (air gap) therefrom; and a rectifier circuit part which is coupled to the motor shaft and rotates in synchronization therewith, and which is electrically connected to the secondary coil part.

The invention discloses a rotary transformer performance test method and system for an automobile motor, and relates to the technical field of motor performance test.The method comprises the steps that parameter configuration is conducted on a tested rotary transformer; the method comprises the following steps: connecting a rotary transformer with an automobile motor controller and a rotating speed encoder, controlling the tested rotary transformer to operate in a dynamic rotating speed sequence, synchronously acquiring output voltage, transformation ratio error, phase deviation and temperature drift data, and extracting harmonic distortion rate and dynamic response delay characteristics; constructing a performance evolution graph, and updating the excitation voltage and the initial working frequency of the primary winding; and determining a comparison result according to a performance test standard to obtain a performance test report. According to the invention, the technical problem that the performance test of the rotary transformer for the automobile motor is lack of comprehensiveness and accuracy in the prior art is solved, and the technical effects of realizing the system test of the performance of the rotary transformer for the automobile motor, generating the report and improving the comprehensiveness and accuracy of the performance test are achieved.

The invention discloses a phase sequence learning method for a permanent magnet synchronous motor of a rotary transformer, which comprises a motor positive and negative phase sequence learning process: step A1, a preset direct-axis current and an electrical angle of the permanent magnet synchronous motor are given, and the electrical angle of the permanent magnet synchronous motor is positively increased; a2, sine and cosine signals of the rotary transformer in the rotating process are obtained, and the positive and negative phase sequences are judged according to the sine and cosine signals; the absolute position difference learning process of the rotary transformer and the permanent magnet synchronous motor comprises the steps that B1, preset direct-axis current of the permanent magnet synchronous motor is given, and the electrical angle of the permanent magnet synchronous motor is set to be zero degree; b2, the electrical angle of the permanent magnet synchronous motor is increased until the rotary transformer outputs zero position information; and step B3, acquiring a current rotated angle of the permanent magnet synchronous motor, and calculating an absolute position difference and a rotor position of the rotary transformer and the permanent magnet synchronous motor. According to the method, the problems of phase sequence learning and angle analysis under different pole pair number combinations of different rotary transformers and permanent magnet synchronous motors are solved.

The embodiment of the present application provides a resonant power supply, a primary feedback excitation power supply controller and method, and a control device, which relate to the field of power supply technology and are used to simplify the secondary circuit of the rotary transformer in the process of controlling the current and voltage output by the rotary transformer. In the resonant power supply, the bridge circuit is electrically connected to the power supply, and the bridge circuit is used to convert the direct current provided by the power supply into a square wave signal according to the drive signal. The LC series resonant network is electrically connected to the bridge circuit and the primary winding, and the LC series resonant network is used to convert the square wave signal into alternating current and output it to the primary winding. The alternating current includes an input voltage V t and input current I r The rectifier bridge is electrically connected to the secondary winding and is used to convert the AC power on the secondary winding into DC power. The primary feedback excitation power supply controller is used to receive the input voltage V t and input current I r and outputs the above driving signal to the bridge circuit.

The application discloses a kind of permanent magnet synchronous motor rotor initial position correction methods for electric vehicle, comprising the following steps: S 10, motor pre-positioning;S20, motor continuous positioning;S30, motor repeated positioning;S40, take the average of positioning angle;S50, take the rotor electric angle corresponding to each positioning angle sample value;S60, take the average of error of each position time sample value and actual value;S70, save average error value;S80, angle correction;The application realizes the correction of permanent magnet synchronous motor rotor initial position, solves the error generated in the process of installing rotary transformer as motor position feedback signal, ensures the consistency of permanent magnet synchronous motor rotor installation position in production process, improves the efficiency of entire drive system, reduces the probability that even can cause drive system failure in extreme situation, greatly improves the safety of drive system.

The invention relates to the technical field of automatic detection, in particular to a multi-channel synchronous measurement analyzer for rotary transformers and a control method, and the analyzer synchronously controls a plurality of slave acquisition mother set modules to perform signal acquisition on a plurality of rotary transformers through a master acquisition mother set module; a corresponding FPGA unit in the acquisition sub-board module synchronously controls a plurality of analog-to-digital conversion units to perform signal acquisition; in the collecting process, the FPGA unit conducts multiple times of phase deviation measurement according to analog signals input by the analog-to-digital conversion unit and digital signals output by the analog-to-digital conversion unit, and corresponding parameters in the RC filters are dynamically adjusted based on the multiple times of measurement results. And meanwhile, the inter-board synchronization module dynamically adjusts the calibration period, and adjusts the calibration period again after a plurality of times of calibration period adjustment, and is also used for adjusting the clock frequency of the corresponding FPGA unit. According to the invention, signal acquisition can be carried out on multiple rotary transformers at the same time, and the test efficiency is improved while the measurement precision is ensured.

DC motor (1) for operation in an external magnetic field comprising: a rotor (2) which is rotatable about an axis of rotation (5) and has at least two windings (10, 11), at least four continuous rotary transformers (3), two rotary transformers (3) being assigned to each of the windings (10, 11) and being designed to supply the respectively assigned winding (10, 11) with direct current, an angle sensor (4) designed to determine the angular position of the rotor (2), and a control unit (15) designed to control the current supply to at least one of the windings (10, 11) as a function of the angular position of the rotor (2), wherein the motor (1) is aligned with an external magnetic field during operation such that the axis of rotation (5) extends transversely to the external magnetic field.

The invention relates to an inductively excited synchronous machine (1) with a stator (2), with a rotor (3) rotatably mounted on the stator (2) about an axis of rotation (4), with a rotary transformer (5) having a stator-fixed primary coil (6) and a rotor-fixed secondary coil (7), and with a rotor-fixed rectifier (8), wherein the rotor (3) has a rotor shaft (9), a rotor lamination stack (10) arranged on the rotor shaft (9) and a rotor winding (11) arranged on the rotor lamination stack (10), and wherein the rotor winding (11) has a winding head (14, 15) projecting axially beyond the rotor lamination stack (10) and spaced radially apart from the rotor shaft (9) at each axial end face (12, 13) of the rotor lamination stack (10). A compact design can be achieved if the rotor (3) has a winding carrier (16, 17) on each axial end face (12, 13) of the rotor lamination stack (10), which rests axially on the rotor lamination stack (10) and on which the respective winding head (14, 15) rests axially and radially on the outside, and if one of the winding carriers (16, 17) has a rectifier receptacle (18) in which the rectifier (8) is arranged.

The invention discloses a motor starting method based on angle fitting, and relates to the technical field of motor starting. According to the method, rapid and stable starting of the motor is ensured through fine angle fitting and current closed-loop control, the method is particularly suitable for the motor with a large-inertia load, the method comprises the steps of initial positioning of the motor, dragging acceleration, closed-loop operation and the like, control parameters are adjusted through feedback of a rotary transformer (rotary transformer) during debugging, and faults are monitored during starting operation. In addition, the method also considers forward and reverse rotation switching and communication fault processing under the condition of no-position operation, so that the flexibility and the reliability of the system are improved.

The application discloses a kind of calibration method and device for rotary variation soft decoding, calibration method includes: according to N times oversampling frequency respectively sampling rotary variation feedback sine and cosine feedback signal envelope surface and obtaining positive, cosine oversampling signal;Positive, cosine oversampling signal is handled to obtain the zero position offset of rotary variation positive, cosine envelope signal;Positive, cosine oversampling signal is handled to obtain the amplitude of rotary variation positive, cosine envelope surface;Positive, cosine oversampling signal is handled to obtain the phase deviation of rotary variation positive, cosine envelope surface;Through the amplitude, zero position offset, phase deviation obtained by calculation, the envelope surface of rotary variation positive, cosine is compensated, and the signal after compensation is sent into phase-locked loop to obtain the angle and rotational speed information of rotary variation.The application obtains accurate amplitude, zero position offset, phase difference in turn, and then carries out error compensation, finally obtains corrected positive, cosine signal, effectively guarantees the efficiency of motor.

The invention provides a fine adjustment device for the meshing depth of a transmission gear, which belongs to the technical field of attack angle sensors and comprises a flange bracket, a mounting bracket, a rotary transformer assembly, a damper assembly and a weather vane rotating shaft assembly, the rotary transformer assembly, the damper assembly and the weather vane rotating shaft assembly are fixed in the circular mounting groove through an eccentric mounting flange and are meshed with one another, and mounting bracket scale marks are arranged on the eccentric mounting flange and the circular mounting groove. According to the device, a linear relation is established between the meshing depth and the scale marks, and the gear meshing depth debugging process of all parts of the attack angle sensor, which is adjusted according to artificial experience, is converted into an indication value which can be directly visually observed. The requirement for experience of operators is lowered, unmeasurable artificial experience is solidified into measurable indication data, the debugging efficiency is improved, and the number of times of wind tunnel test verification caused by repeated debugging is reduced.

The invention provides an automobile rotary transformer zero-position self-learning device and method.The device comprises a host, the host is in communication connection with a motor control unit through a butt joint port, and the host is used for controlling the motor control unit to conduct rotary transformer zero-position self-learning; and judging whether the resolver zero self-learning is successful or not according to the resolver zero self-learning result. The method can be directly used for resolver zero-position self-learning after the driving assembly is replaced and resolver loading is carried out, and a series of cost, time and performance influences caused by direct replacement of the driving assembly are reduced.

The invention discloses a rotor position detection method for multiplexing a synchronous motor body as a rotary transformer, and the method comprises the following core steps: a, independent detection windings (2) are embedded in grooves of a stator (3), the number of detection coils contained in each phase of independent detection winding (2) is equal to 1 / 2n of the number of rotor salient poles (4), and n is a natural number smaller than 10; b, detection coil parameters of all the independent detection windings (2) are completely consistent, the electrical phase difference between the independent detection windings (2) of each phase is equal to 360-degree electrical angle divided by the phase number of the independent detection windings, and the independent detection windings (2) are uniformly distributed on the inner circumference of a stator slot; c, the independent detection windings (2) of all phases are sequentially connected in series end to end and then connected into a carrier signal generated by a carrier generator, and the real-time angle position of the rotor salient pole (4) is calculated through a precise full-wave rectifier, a potential translation circuit and a position conversion module. A solid rotor position sensor is abandoned, a synchronous motor body is reused as a core component of a rotary transformer, and sensorless rotor position detection is achieved; the device adapts to special working conditions such as high temperature, strong electromagnetic interference and full sealing; according to the invention, excitation current interference is eliminated, the detection precision is improved, position closed-loop control in a zero-speed-full-speed range is realized, the response speed is high, the control precision is high, the production cost is low, and the synchronous motor is suitable for various synchronous motors with rotor magnetic resistance anisotropy and circumferential uniform distribution, such as a new energy automobile dragging motor, a linear motor and a household appliance totally-enclosed compressor.

The invention provides a system and method for simulating functions of a rotary transformer based on an ARM and an FPGA. Motion simulation of a servo platform and DAC voltage at a certain angle position are achieved through calculation of an ARM + FPGA hardware circuit and a software program on a core board; an angle analog output DAC voltage signal of the core board is sent to a circuit AD5668 of the electronic platform analog board through a serial port, the circuit AD5668 outputs a sine and cosine signal corresponding to the angle, multiplication of an excitation signal and the sine and cosine signal is achieved through AD633JR / AR, a rotary transformer signal is output and directly output to a servo control board, and the servo control board is connected with the electronic platform analog board. Position closed-loop control of the servo platform is realized, and an excitation signal is given by the servo control board to be tested. A method of combining a hardware integrated circuit and a software program is adopted, the function of the rotary transformer is simulated and achieved, uncertain factors caused by the structure are reduced, and the effect of angle output simulation is achieved.

The invention relates to a brushless motor with balance ring diodes. The brushless motor comprises a housing, a stator assembly, a rotor assembly, a rotary transformer and a rectifier. The stator assembly is disposed within the housing and includes a stator winding disposed on a stator core. A rotor assembly is also positioned within the housing with an air gap separating the rotor assembly from the stator assembly. The rotor assembly includes a rotor shaft, a rotor winding, and a balance ring. A resolver is positioned within the housing and includes a primary coil and a secondary coil. The rectifier includes a plurality of diodes positioned on a balance ring. A rectifier is electrically connected between the secondary coil and the rotor winding.

A rotary transformer is disclosed herein comprising a stationary portion and a rotating portion. The stationary portion includes a transformer housing, a primary coil positioned within the transformer housing and defining a central axis, and a stationary printed circuit board (PCB). The stationary PCB includes an excitation coil of an inductive position sensor and at least one sensing coil of the inductive position sensor. The rotating portion of the rotary transformer includes a rotating PCB with a secondary coil of the rotary transformer positioned on the rotating PCB. The rotating portion further includes a diode holder connected to the rotating PCB. The diode holder includes at least one target for the inductive position sensor.

The invention provides a diagnosis method and device for a rotary transformer, electronic equipment and a storage medium, and the method comprises the steps: collecting preset diagnosis data in a soft decoding process of the rotary transformer, carrying out the real-time verification of the diagnosis data, obtaining a verification result corresponding to each fault type, and carrying out the real-time verification of the verification result. And finally, generating a diagnosis result of the rotary transformer according to inspection results corresponding to all fault categories, thereby realizing acquisition of signals of the whole rotary transformer and monitoring of a soft decoding process.

The invention discloses a permanent magnet variable-pitch motor. The permanent magnet variable-pitch motor comprises a motor body, a brake mechanism and a rotary transformation mechanism, the motor body is provided with a driving side and a braking side which are arranged oppositely; the motor body, the braking mechanism and the rotary transformation mechanism are sequentially arranged in the direction from the driving side to the braking side; a rotating shaft is arranged in the motor body; the invention further comprises a rotary transformer stator disassembling and assembling method. The method comprises the steps that firstly, the rotary transformer cover is disassembled; and 2, under the action of external force, the movable head extends out towards one side far away from the sleeve part until the movable head and the sleeve part reach the maximum length. Different from a guide mechanism in the prior art, the sleeve piece can play a role of a rotary transformer rotor pressing plate in the prior art, and meanwhile, the peripheral side surface of the sleeve piece can serve as a guide surface for guiding the rotary transformer stator to be disassembled.