824 results about "Rotary transformer" patented technology

The invention relates to a tiny fault detection method for a rotary transformer of a vehicle driving motor. The method comprises the following steps: acquiring a three-phase current measured value of a motor, a rotating speed measured value of a motor rotor and a position angle measured value; converting the three-phase current measured value of the motor into a fixed coordinate system through coordinates to obtain a two-phase current measured value; obtaining a two-phase current estimated value, a rotating speed estimated value of the motor rotor and a position angle estimated value output by the fault detection observer, comparing the two-phase current estimated value, the rotating speed estimated value of the motor rotor and the position angle estimated value with the two-phase current measured value, the rotating speed measured value of the motor rotor and the position angle measured value, and calculating to obtain an evaluation function value; whether the evaluation function value exceeds a pre-configured threshold value or not is judged, and if yes, it is judged that the rotary transformer has a fault. Compared with the prior art, the method has the advantages that the influence of the fault can be distinguished from the uncertainty and noise of the system, so that the detection precision is improved.

The invention provides a parameter calculation method and device of a permanent magnet traction motor. The PHM board card is used for collecting the three-phase current of the permanent magnet traction motor, the decoding angle of the rotary transformer, the on-off state of the inverter and the intermediate voltage in the operation process of the traction converter of the motor train unit, so that the inductance, resistance and permanent magnet flux linkage of the permanent magnet traction motor of the motor train unit are monitored in real time, and other hardware facilities do not need to be added; according to the parameter observation scheme disclosed by the invention, the motor parameters can be quickly obtained according to the high-sampling-rate parameters, and an effective reference can be provided for motor state fault early warning.

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.

A system is provided for transferring power between a stator and a rotor of an excitation system. The stator and the rotor may form part of a rotary transformer that includes a primary winding and a secondary winding, where power is transferred from the primary winding to the secondary winding or conversely from the secondary winding to the primary winding.

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 discloses a rotary transformer angle resolving method based on successive approximation of a difference angle formula, and relates to the technical field of motor control, and the method comprises the steps: calculating the maximum change angle of the rotor angle of a rotary transformer in each decoding period based on the maximum operation speed of a rotating mechanism; setting a comparison angle, and setting the value of the comparison angle to be 0; acquiring a sine value and a cosine value corresponding to a current rotor angle of the rotary transformer, calculating a sine value and a cosine value corresponding to a comparison angle, and substituting the sine value and the cosine value into a difference angle formula for calculation; and calculating by adopting a successive approximation method to obtain the current rotor angle of the rotary transformer. According to the method, the comparison angle is set, the sine and cosine values are calculated and substituted into the difference angle formula, the result is calculated, and the current rotor angle of the rotary transformer is calculated by adopting the successive approximation method, so that the angle calculation of the rotary transformer is more accurate, and the problems of poor noise immunity and large static fluctuation of a software decoding scheme are avoided.

The invention provides a motor angular velocity calibration method, a motor control method and a motor control system, and relates to the technical field of motor control, and the calibration method comprises the steps: obtaining angular position information and angular velocity information outputted by a rotary transformer; constructing a discrete expansion state observer DESO, and obtaining an initial ideal angular velocity based on the DESO, the angular position information and the angular velocity information; and processing the initial ideal angular velocity based on a closed-loop transfer function of the same-frequency extractor to obtain an ideal angular velocity. The motor control method comprises the following steps: combining a linear sliding mode surface with a nonlinear sliding mode surface to construct dynamic nonsingular terminal sliding mode control. The problem of contradiction between the sliding mode approaching speed and buffeting is solved, the problem that the rotating speed fundamental frequency is difficult to extract when the CMG system works normally is solved, the precision of the output signal of the rotary transformer is improved, and high-precision speed control of the motor is realized.

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 electrified powertrain of a vehicle includes a battery pack connected to a traction power inverter module (TPIM), which converts a direct current (DC) voltage from the battery pack to alternating current (AC). A rotating electric machine includes a stator, which is excited by the AC voltage from the TPIM, and enclosing a rotor core that can rotate. The rotor core contains recesses that hold conductive bars and permanent magnets, with the conductive bars positioned closer to the center of the rotor core. The conductive bars and permanent magnets are separated by gaps in each recess. An annular end ring assembly is present at one end of the rotor core and has connecting conductors that are connected to subsets of conductive bars and a secondary coil of a rotary transformer. When the stator is excited, the rotor shaft, which is connected to the rotor, rotates.The electric machine drives a gearbox that is coupled to the rotor shaft.

An electrified powertrain of a vehicle includes a battery pack linked to a traction power inverter module (TPIM) that converts a DC voltage from the battery pack to an AC voltage. A rotating electrical machine includes a stator excited by an AC voltage of a TPIM, surrounding a rotatable rotor core. The rotor core includes slots that accommodate conductive strips and permanent magnets, the conductive strips being positioned closer to the center of the rotor core. The conductive strip and the permanent magnet are separated by a gap within each slot. An annular end ring assembly is present at one end of the rotor core, characterized in that the terminal conductors are connected to a subset of the conductive strips and the secondary coil of the resolver. When the stator is energized, a rotor shaft connected to the rotor rotates. An electric machine powers a transmission coupled to the rotor shaft.

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.

The invention discloses a motor controller system and method for determining the rotation angle of an engine crankshaft, the system comprises a rotary transformer, a motor controller and an engine control unit, the crankshaft of a fuel engine and the input shaft of a motor are the same shaft, and the rotary transformer outputs a voltage analog signal; the motor controller receives the voltage analog signal and analyzes the voltage analog signal to obtain angle information, and outputs a pseudo square wave signal; and the engine control unit receives the pseudo square wave signal and controls the engine to perform oil injection and ignition according to the pseudo square wave signal. According to the invention, a crankshaft position sensor does not need to be installed on the flywheel of the fuel engine, signals of the crankshaft position sensor can be simulated, the timing of oil injection and ignition of the engine can be controlled, and the improvement such as analog-to-digital conversion does not need to be added to the engine controller unit, so that the working efficiency is improved.

The invention discloses a dynamic stiffness performance analysis method for an all-in-one motor assembly for a vehicle, sub-components of the all-in-one motor assembly comprise a controller upper cover plate, a controller lower cover plate and a rotary transformer cover plate, and the method comprises the following steps: 1) carrying out frequency domain response tests on the sub-components of the all-in-one motor assembly; 2) modal frequency identification of each sub-component of the all-in-one motor assembly; 3) performing frequency domain response test on each suspension mounting point of the all-in-one motor assembly; 4) calculating the dynamic stiffness of each suspension mounting point of the all-in-one motor assembly; 5) performing a frequency domain response test of the all-in-one motor assembly; 6) identifying the modal frequency of the all-in-one motor assembly; and 7) calculating and analyzing the rigidity performance of the all-in-one motor assembly. According to the invention, rapid iteration of the all-in-one motor assembly can be realized on the premise of no rack and whole vehicle resource support; the purposes of shortening the development period, recognizing risk problems in advance and saving the test cost of the whole vehicle are achieved.

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 discloses a dual-redundancy permanent magnet synchronous motor based on a dual-redundancy brushless rotary transformer. The dual-redundancy permanent magnet synchronous motor comprises a synchronous motor body and a rotary transformer. The motor body adopts an armature duplex winding with double windings, and the rotary transformer rotor component adopts a rotary transformer rotor duplex winding coil with double windings and an annular transformer rotor duplex winding; the rotary transformer stator component adopts a rotary transformer stator duplex winding with double windings and an annular transformer stator duplex winding, that is, the synchronous motor body and the rotary transformer of the dual-redundancy permanent magnet synchronous motor both adopt a structure with double windings. When any one of the armature duplex winding, the rotary transformer rotor duplex winding coil, the ring transformer rotor duplex winding, the rotary transformer stator duplex winding and the ring transformer stator duplex winding breaks down, the other backup winding can continue to work, and the reliability of the duplex winding motor is two times that of a single winding motor. Therefore, the reliability of the permanent magnet synchronous motor is improved.

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.

The invention provides a motor simulator control system and method based on an ARM and double-FPGA architecture, and a computer readable storage medium, and mainly solves the technical problem that the test precision of an existing motor simulator on a motor controller is reduced due to the fact that the simulation precision of the existing motor simulator on a real motor is not enough. Wherein the control system comprises an ARM control unit, a centralized control FPGA unit and a rotary transformer FPGA unit, the ARM control unit and the centralized control FPGA unit mainly realize functions of a motor control algorithm, PWM output and the like, the rotary transformer FPGA unit mainly undertakes a rotary transformer simulation function, and the three units jointly form a whole set of motor simulator model algorithm. Therefore, accurate simulation and high-precision output of the motor model are realized.

A motor assembly includes a brushless electric motor including a motor stator and a motor rotor configured for rotating within the motor stator. The motor stator includes a plurality of windings. The brushless electric motor also includes a rotor shaft non-rotatably connected to the motor rotor for rotating with the motor rotor and a resolver position sensor including a resolver stator and a resolver rotor configured for rotating within the resolver stator. The resolver rotor is non-rotatably connected to the rotor shaft for rotating with the rotor shaft. The resolver stator generates a signal based on a rotational position of the resolver rotor. The brushless electric motor also includes a rotor shaft bearing coupled to the rotor shaft and a bearing support supporting the rotor shaft bearing to allow the rotor shaft to rotate with respect to the bearing support. The bearing support is or includes an electromagnetic interference shield to reduce or block electromagnetic waves emitted by the windings of the motor stator from interfering with the signal generated by the resolver stator.

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 utility model provides a rotary transformer simulation device, which is applied to the technical field of motor testing, and comprises a main controller and an input signal conditioning module, the input end of the main controller is connected with a first input signal, and the output end of the main controller outputs a first output signal through a first output signal module; outputting a second output signal through a second output signal module; the first output signal module comprises a digital-to-analog converter I and an output signal conditioning module I, and the second output signal module comprises a digital-to-analog converter II and an output signal conditioning module II; the input signal conditioning module receives a second input signal and then processes the second input signal, the processed signal is respectively transmitted to the main controller, the digital-to-analog converter I and the digital-to-analog converter II, and the second input signal is an excitation signal EXC output by the motor control driving unit. The device is small in size, light in weight and low in cost, can be suitable for a large-scale production environment, does not have the problems of mechanical wear, aging and the like, and is relatively low in maintenance cost.

The invention discloses a potting type high-precision sine and cosine rotary transformer and a processing method, and relates to the field of sine and cosine rotary transformer processing applied to an extreme environment, and the processing method comprises the following steps: potting and curing a rotor, and potting a part on the outer side of a rotor bracket with a potting material to obtain a rotor potting piece; potting and curing the stator, and potting the inner side part of the primary side iron core of the annular transformer by a potting material to obtain a stator potting piece; and grinding the outer circular surface of the rotor potting piece, and grinding the inner circular surface of the stator potting piece. And the rotary transformer functional parts are all tightly packaged, so that the working field of the rotary transformer is greatly widened, the capability of the rotary transformer for resisting severe environments such as hydraulic oil, moisture and mould is improved, and the explosion-proof reliability is improved.

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 provides a rotary transformer zero calibration method and device. The method comprises the steps of determining a plurality of first test currents according to a pre-calibrated IsMax value and a preset d-axis current instruction value determination algorithm; wherein the q-axis current instruction value of the first test current is 0; performing control test on the motor controller according to the first test current to obtain a rotary transformer zero rough value; determining a first control target and a second control target of the resolver position angle; determining a second test current according to the rotary transformer zero rough value; wherein the q-axis current instruction value of the second test current is 0; performing control test on the motor controller according to the first test current, the first control target and the second control target to obtain a to-be-written rotary transformer zero value; and writing the to-be-written rotary transformer zero value into an NVM (Non-Volatile Memory) of a motor controller. According to the method and the device, the zero position of the rotary transformer can be accurately and quickly recalibrated, so that the NVH problem is avoided, and the performance of the electric vehicle and the user experience are improved.

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.

The utility model discloses a toothed rotary transformer convenient for zero setting by using automatic equipment, which comprises a motor end cover, a rotary transformer stator assembly, a fastening bolt, a rotary transformer shell, a rotary transformer stator coil, a rotary transformer signal line, a rotary transformer toothed shell, a rotary transformer shell gear structure and a zero setting mechanism, the rotary transformer toothed shell is a toothed shell arranged on the circumference of a rotary transformer shell. The utility model has the beneficial effects that the servo motor system is used as a power source for angle adjustment, compared with manual zero adjustment, the angle control of the system is very accurate, the time for repeated adjustment is reduced, and the efficiency is improved.

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.