1501 results about "DC motor" patented technology

The invention relates to the technical field of direct current motor servo drive control, and provides a Zynq AXI4 bus-based real-time transmission system and a control method thereof, and the system comprises a Zynq system on chip, a DDR3 common data area, an AXI4 bus interconnection architecture and a dynamic partition manager. By implementing the scheme, firstly, the multi-channel characteristic of the AXI4 bus is utilized, special transmission channels are distributed for different types of data, and parallel data interaction is realized; secondly, a dynamic partition manager is deployed at a PL end, a DDR3 public data area is dynamically divided into a plurality of partitions in real time according to needs, multi-task parallel is achieved, and the real-time performance of the system is improved; thirdly, the read-write operation on the DDR3 in each control period is split into a plurality of state machines through precise scheduling of the state machines, the state machines are combined into a state loop to be mounted to an AXI4 bus, it is ensured that key tasks are completed on time, and the certainty of the system is improved; fourthly, the size and the number of partitions in the DDR3 are dynamically adjusted through a dynamic partition manager, and the storage efficiency is improved.

The present technology relates to fault-managed power (FMP), and particularly, to generating FMP in an industrial automation environment using single-pair Ethernet (SPE) cabling for use by DC motors. An FMP system may include transmitter circuitry and receiver circuits coupled together via a transmission link formed using SPE cable. The transmitter circuitry can generate a FMP and transmit a pulsed signal having the FMP to the receiver circuits. The transmitter circuitry can also exchange data signals with the receiver circuits over a communication channel using the SPE cable. The receiver circuits can identify an expected power consumption of DC motors coupled to the receiver circuits and provide an indication of the expected power consumption to the transmitter circuitry. The transmitter circuitry can detect a fault based on a comparison between the transmitted FMP and the power consumption and terminate transmission of the FMP in response to detecting the fault.

The invention provides an electronic temperature protection control method for a direct current brushless motor, and relates to the technical field of motor control, and the method comprises the steps: temperature sampling: employing a controller or a motor internal sensor and a winding resistor to estimate and collect a temperature signal in real time; temperature filtering: eliminating noise interference by adopting mean value or Kalman filtering; temperature comparison: comparing the filtered temperature value with a preset multi-level threshold value (from one level to three levels); and protection control is carried out, and measures such as power reduction, current limiting or driving signal closing are taken according to the threshold exceeding degree. Through multi-point sampling, heat conduction installation, dynamic filtering parameter adaptation and threshold setting based on the insulation grade, the temperature monitoring precision and response speed are improved, the problems of response lag and cost of traditional hardware protection are avoided, dynamic and precise temperature protection of the motor is achieved in combination with a thermal response time constant and temperature change rate pre-judgment mechanism, and the reliability of the motor is improved. The service life of equipment is effectively prolonged.

The invention discloses a degradation trend prediction method for a brushless direct current motor, and relates to the technical field of motor control, current, temperature and vibration signals of motor operation are collected, a characteristic signal transmission path model of a winding, a bearing and magnetic steel is constructed, and the degradation trend of the brushless direct current motor is predicted by analyzing the reflection characteristics and attenuation conditions of degradation signals of all parts. Extracting characteristic quantities of mutual influence among current, temperature and vibration; according to the method, a multi-component characteristic signal transmission path model is constructed, degradation signals are regarded as fluctuation quantity transmitted and reflected among different components, mutual influence of current, temperature and vibration signals is comprehensively analyzed, false characteristics are separated in combination with heat transfer lag characteristics and cooperative change critical points, accurate extraction of real degradation characteristics is realized, and the accuracy of the degradation characteristic extraction is improved. The problem that weak degradation signals are covered by interference is solved.

There is provided be a brushless direct current, BLDC, electric motor. The BLDC electric motor comprises a rotor comprising a rotor shaft and a stator arranged around the rotor shaft. The stator comprises a stator hub comprising electromagnets, and cooling channels extending in a direction that is parallel to a longitudinal direction of the rotor shaft and the cooling channels are positioned between the rotor shaft and the electromagnets.

A zoom ring drive device (10) comprises a guide unit (11), a guide unit (14), a drive gear (21), and a DC motor (23). The guide unit (11) slides in the optical axis direction of a lens (L1) included in the lens barrel (32). The guide unit (14) is provided to the guide unit (11) and slides in a direction perpendicular to the optical axis direction. The drive gear (21) is provided in the guide unit (14) at a position where the drive gear comes into contact with a ring gear (25) wound around a zoom ring (33), and rotates in a state of being in contact with the ring gear (25) to rotate the zoom ring (33). The DC motor (23) is provided to the guide unit (14) and rotationally drives the drive gear (21).

The invention relates to the technical field of direct current motor driving, and provides a high-speed direct current motor driving system which comprises a control module, a driving module and a feedback module and is based on an analog switch and an FPGA. By implementing the scheme, in the first aspect, the two sides of the direct current motor of the middle bridge arm of the full-bridge power circuit are each connected with a sampling resistor in series, and high-precision bidirectional current measurement of the direct current motor is achieved and the reliability of a driving system is improved through full-path detection and common-mode rejection under the condition that the power extension time and power consumption are not increased; and on the second aspect, the common-mode input voltage of the operational amplifier is relatively small through the use of the analog switch and the amplitude limiting diode, and the operational amplifier is not required to be limited by high common-mode voltage, so that the type of the operational amplifier with higher response speed can be selected. And thirdly, a fault detection unit and a redundancy check unit are arranged in the FPGA, and the safety and the reliability of the system are improved through cooperative work of the FPGA, a double-sampling resistor, an amplitude limiting diode and an analog switch.

The invention relates to a motor control technology, and discloses a current sampling method of a DC brush motor, electromechanical equipment and a storage medium, and the method comprises the steps: configuring a plurality of sampling points in a single carrier period of a PWM signal; controlling the started DC brush motor to operate based on the configured PWM signal; carrying out multi-point sampling of carrier period synchronization on the motor current based on an ADC (Analog to Digital Converter) sensor; automatically storing the sampled data into a buffer area based on DMA (Direct Memory Access); when it is detected that the buffer area is full, sampling interruption is triggered, and current data of the buffer area are read for filtering processing; the filtered current data are input into a current loop PID controller, and the duty ratio of a PWM signal is adjusted; and based on the adjusted PWM signal, returning to execute the step of controlling the started DC brush motor to operate based on the configured PWM signal. The invention further discloses a control device. The invention aims to improve the current sampling precision of the DC brush motor, and further improve the control response speed and stability of the system.

The invention relates to the technical field of sensor fault detection, in particular to a brushless direct current motor sensor fault detection method and system based on a neural network. Comprising the following steps: setting a detection priority of each sensor, and carrying out fault detection in a preset time period; predicting the path range of the equipment at the next moment by combining the sensing information, the position information, the equipment control information and the neural network path prediction model at the previous moment, and obtaining the path deviation through the deviation between the actual path and the prediction range; simulating a motor parameter based on the control information, the path deviation and the motor attribute information, calculating the deviation degree of the simulation parameter and the real-time sensing information, and identifying a fault sensor; and dynamically adjusting the detection priority according to the deviation degree, and entering a fault-free sensor mode when a fault occurs. The problem of dynamic detection of the motor is solved, the detection efficiency and precision are improved, and the real-time performance and reliability of motor control are guaranteed.

A rotary drive assembly of an electric nail gun, comprising a support seat configured on a gun frame, an inner-rotor brushless DC motor and a flywheel configured inside the support seat in a coaxial manner. Along an assembly axial direction, the support seat is formed with a motor housing chamber to house the brushless DC motor and a flywheel housing chamber to house the flywheel, the two chambers being separated from each other. The motor housing chamber is formed with an axial port for assembly and heat dissipation of the brushless DC motor. The flywheel housing chamber is formed with a radial port to expose part of the flywheel outside the support seat. The axial port is perpendicular to the radial port. The invention can simplify the structure of the rotary drive assembly and facilitate its assembly and heat dissipation.

The present technology relates to fault-managed power (FMP), and particularly, to generating FMP in an industrial automation environment using single-pair Ethernet (SPE) cabling for use by DC motors. An FMP system may include a transmitter circuit and receiver circuits coupled together via a transmission link formed using SPE cable. The transmitter circuit can generate a FMP and transmit a pulsed signal having the FMP to the receiver circuits. The transmitter circuitry can also exchange data signals with the receiver circuits over a communication channel using the SPE cable. The receiver circuits can identify an expected power consumption of DC motors coupled to the receiver circuits and provide an indication of the expected power consumption to the transmitter circuit. The transmitter circuit can detect a fault based on a comparison between the transmitted FMP and the power consumption and terminate transmission of the FMP in response to detecting the fault.

The invention discloses a brushless direct current motor and a control method thereof, and relates to the technical field of motor equipment.The brushless direct current motor comprises a motor shell and further comprises a driving circuit, and the driving circuit is located in the motor shell. A protective cover is arranged on the outer side of the rotor mounting cover, and a positioning clamping seat is arranged on one side of a heat dissipation fan blade to reinforce and mount the motor shell and the rotor mounting cover, so that the connection stability of equipment in use is improved; the auxiliary mounting mechanism is arranged, the motor shell and the mounting side plate are subjected to reinforced connection treatment through the first connecting shaft, and daily maintenance treatment can be conveniently carried out on the whole; according to the invention, the MCU unit is used for receiving the position feedback from the Hall sensor, and the MCU unit can control the current switching of the stator winding, so that a rotating magnetic field is generated to drive the rotor to rotate, and the error is the difference between a target value and an actual value.

The utility model relates to a constructional engineering sand screening device which comprises a mounting frame, the top of the mounting frame is provided with a self-cleaning sand screening structure, the sand screening structure comprises an overturning frame rotationally mounted in the mounting frame, and four elastic supporting assemblies are arranged in the overturning frame. A vibrating frame is fixedly mounted at the tops of the four elastic supporting assemblies, a screen is fixedly mounted on the inner side of the vibrating frame, and a connecting rod is fixedly mounted at the bottom of the vibrating frame. According to the sand screening device for constructional engineering, the vibration motor operates to drive the vibration frame and the screen mesh to vibrate through the connecting lever, sand is poured on the top of the screen mesh and then screened, and when too many broken stones are clamped on the screen mesh, the direct current motor drives the overturning frame to rotate, so that the screen mesh faces downwards; and then the vibration motor continues to operate to drive the vibration frame and the screen to vibrate, so that the broken stones can be shaken off, and the effect of automatically cleaning the blocked sand and stones is achieved.

The invention discloses a DC motor fault diagnosis method based on improved local mean decomposition and composite multi-scale bubble entropy fusion, and relates to the technical field of motor fault diagnosis. In order to solve the technical defect of insufficient fault feature extraction of the existing motor fault diagnosis technology in the prior art, the technical scheme provided by the invention comprises the following steps: collecting a sound signal in a running state of a direct current motor as an original signal; decomposing the original signal by adopting an improved local mean decomposition method to obtain a plurality of product components, and screening out effective feature components with high correlation with the original signal; performing composite multi-scale bubble entropy calculation on the effective feature component, and extracting a multi-dimensional entropy feature vector representing signal complexity; and inputting the multi-dimensional entropy feature vector into a particle swarm optimization extreme learning machine model for classification so as to obtain a fault diagnosis result of the DC motor. The method can be widely applied to real-time monitoring and intelligent fault identification of the running state of the direct-current motor in industrial production.

The invention discloses an arbitrary three-dimensional terrain visual coverage unmanned aerial vehicle energy optimization trajectory generation method, which comprises the following steps of: generating visual coverage air route points: selecting a mountain region, acquiring a rough digital elevation model by utilizing a geographic information system or level flight shooting, calculating the air route points based on photogrammetry constraints, and calculating the visual coverage air route points; traversing the waypoints according to a predetermined sequence to complete a coverage task; modeling the energy consumption of the motor of the unmanned aerial vehicle: taking the brushless direct current motor as an object, carrying out mathematical modeling in combination with torque dynamics and electromagnetic equations of the motor, constructing a physical information neural network model, and training and optimizing flight data; and track optimal prediction control input mapping: designing an optimal prediction control method based on unmanned aerial vehicle dynamics, and calculating a mapping relation between the track and control input. According to the invention, the coverage efficiency can be obviously improved, so that the single flight coverage range of the unmanned aerial vehicle is expanded.

A camera system includes a camera body, a lens barrel that is mounted to the camera body and includes at least one movable lens, and a zoom ring drive device that is mounted to the camera body. A first control unit of the camera body controls a second control unit of the lens barrel and a third control unit of the zoom ring drive device so as to move a zoom lens with a DC motor on the basis of information about the characteristic of the zoom lens and an optical characteristic value inputted to an input unit.

The invention discloses a high-speed brushless direct current motor torque ripple suppression method, device and equipment and a storage medium, and belongs to the technical field of motor control. The method comprises three steps of adaptive harmonic suppression processing, phase compensation angle calculation and dynamic phase compensation. According to the invention, the center frequency is dynamically adjusted through the adaptive harmonic wave notch filter, the dominant harmonic component is inhibited in real time, and in combination with cascade delay signal elimination, 6k fixed subharmonics are filtered through the CDSC filter, so that a fundamental wave current signal is obtained; park transformation is carried out on the fundamental wave current based on an FOC algorithm, a PI controller is utilized to generate a phase delay angle according to a d-axis current error, and then a reference current compensation module dynamically compensates a current reference value to ensure phase synchronization of phase current and back electromotive force. Compared with the prior art, additional hardware equipment is not needed, and the torque ripple of the BLDC is reduced.

The invention belongs to the technical field of mechatronics, and relates to a four-finger flexible gripper applied to a four-rotor unmanned aerial vehicle. The device is characterized by comprising an electric control part, a soft claw base, a fishing line, fingers and a connecting piece between the electric control part and the base, the electric control part comprises two speed reduction direct current motors, a winch, an electric control assembly, a lithium battery and an upper computer. And four fingers are fixed at four corners below the soft claw base. The base is fixedly connected with the fingers, and the fingers are fixedly connected through screws. Motor racks are fixed to the middle positions of the fingers on the same side above the base, and all the motor racks are connected through screws. Logarithmic spiral lines are benchmarked on the elephant nose and serve as driving lines to be benchmarked on tendons; meanwhile, the state when the tendons are relaxed is used as the initial state of the soft claws, and the effects that the soft claws are folded when the tendons are tensioned and unfolded when the tendons are relaxed are achieved.

The present disclosure provides an onboard electric pump assembly for an air gun. The onboard electric pump assembly includes: a high-speed DC motor powered by a battery; a controller that is operable by a user through a user interface, where the controller is configured to control the high-speed DC motor, and a mounting structure to mount the high-speed DC motor within the air gun an air gun.

The invention relates to a method and an electronic device for the indirect field-oriented control (FOC) of a brushless DC motor (1) using digital Hall sensors (3a-3c) for detecting the instantaneous rotor position of the DC motor (1) for the purpose of torque control, wherein an electrical revolution of the rotor (2) by a plurality (n) of digital Hall sensors (3a-3c) arranged equidistantly to one another in relation to the rotor circumference is divided into twice (2n) as many sectors, wherein each sector corresponds to a defined Hall pattern and a change in the Hall signal is interpreted as an exceeding of the limit of a sector caused by the rotation of the rotor (2) in order to apply an incrementally constant rotor angle (α) for determining the instantaneous rotor position for the field-oriented control.

The invention provides a control method and system for a high-precision brushless direct current motor, and relates to the technical field of motor control, and the method comprises the steps: determining the information of a plurality of washings based on the internal video of the test running speed of a washing machine; clustering the information of the multiple washings based on the K value of the clustering algorithm to obtain K clusters; processing the K clusters based on a velocity analysis model to determine the washing time and power of the cluster with the shortest washing time; based on the washing time and the power of the cluster with the shortest washing time, controlling the high-precision brushless direct current motor to carry out washing, and obtaining an internal video of the washing machine at the first washing time; determining subsequent working time and power of the high-precision brushless direct current motor based on the internal video of the washing machine at the first washing time; the high-precision brushless direct current motor is controlled based on the subsequent working time and power of the high-precision brushless direct current motor, and the method can efficiently and accurately determine the target washing strategy of the washing machine.

The invention discloses a direct current motor drive circuit layout optimization method based on thermal simulation, and relates to the technical field of circuit layout optimization. The method comprises the following steps: modeling circuit thermal characteristics, defining a thermal resistance network of a power device, considering a heat conductivity coefficient of a PCB, constructing an electric-thermal coupling model, setting boundary conditions, loading current and voltage, solving a temperature field by using a Joule law and a Fourier equation, defining layout variables, establishing an objective function containing junction temperature, temperature difference and cost, and performing iterative optimization by using a genetic algorithm. And thermal simulation optimization of the layout of the driving circuit is realized. The temperature field is accurately predicted, the heat management efficiency is improved, and the optimization period is shortened; thermal coupling influence is reduced, chip stability is guaranteed, multi-working-condition verification is reliable, heat dissipation is consistent with simulation, cost can be reduced, and safety and service life of a motor system are improved.

The utility model discloses a multi-training-position sitting posture body anteflexion testing device, which comprises a plurality of groups of testing mechanisms, the plurality of groups of testing mechanisms are arranged in an arc shape, each testing mechanism comprises a bottom plate, each bottom plate is provided with a testing adjusting assembly, and each bottom plate is also provided with a binding assembly for positioning knee joints of a tester. The bottom plate is also provided with a carrying platform, and the carrying platform is provided with a measuring assembly. The test adjusting assembly comprises a cushion, the cushion is arranged on the bottom plate, a first nut is arranged on the cushion and connected with a first ball screw, the first ball screw is arranged in a first groove, one end of the first ball screw is connected with a driving shaft of a first permanent magnet bidirectional direct current motor located on one side of the bottom plate, and the other end of the first ball screw is connected with a second permanent magnet bidirectional direct current motor located on the other side of the bottom plate. According to the utility model, the sitting position can be adjusted, the use requirements of testers with different heights can be met, and the position of the fixing bandage can be adjusted, so that the fixing bandage can be used by the testers with different heights.

The invention discloses an active and passive mode conversion system and method suitable for active and passive rehabilitation training. The system comprises a current collector, an encoder, a motor driver, a direct current motor and a main controller. The motor driver obtains the real-time current and the output real-time rotating speed of the direct current motor according to the output signals of the current collector and the encoder; the main controller determines the active / passive intention or spasm condition of a current user according to the real-time current, the real-time rotating speed information and the speed value information set by the user, calculates a driving instruction and sends the driving instruction to the motor driver; the torque self-adaption driving device is used for driving the direct-current motor to adaptively carry out dynamic switching of active / passive states or enter a spasm protection program through double closed-loop control timely output torque. The method has the effects that the rigidity of the direct-current motor is large in the passive mode when the rotating speed of the motor is smaller than the expected value, the resistance of the motor is adjustable in the active mode when the rotating speed is higher than the expected value, and active and passive intention recognition and spasm detection can be carried out.

Technical solutions for diagnosing a sensor fault in an actuator incorporating a permanent magnet direct current (PMDC) motor are described, including: measuring, by means of a position sensor, the position of the PMDC motor; determining, based on the measured position, an estimated motor speed; measuring, by means of a current sensor, the current in the PMDC motor; determining, based on the measured current in the PMDC motor, a voltage command for the PMDC motor; determining, based on the measured current and the voltage command and using a motor speed observer, an observed speed of the PMDC motor; determining a differential speed as the difference between the estimated motor speed and the observed speed; determining, based on the differential speed, the sensor fault; and performing an action in response to the determination of the sensor fault.

The invention discloses a direct current brushless motor and a processing system thereof, and belongs to the field of assembling equipment, the direct current brushless motor comprises a workbench, an assembling area is arranged at the upper end of the workbench, a clamping mechanism and an assembling mechanism are arranged in the assembling area, the clamping mechanism and the assembling mechanism are arranged at intervals in the axial direction of a workpiece, and the assembling mechanism comprises a support. The support moves in the axial direction of a workpiece, a rotating part, a driving rod and an assembling driving mechanism are arranged on the support, the rotating part is arranged in the axial direction of the workpiece, the rotating part is driven by a workpiece rotating motor to rotate around the axis of the workpiece rotating motor, and a connecting mechanism used for being connected with the workpiece is arranged on the rotating part; the driving rod moves in the radial direction of the workpiece and extends towards the side of the clamping mechanism. And the assembly driving mechanism drives the pushing part to move in the axial direction of the workpiece. The invention aims to provide the direct-current brushless motor and the processing system thereof, and the labor intensity of workers can be reduced.

The invention discloses a high-efficiency and fast-response control method for a brushless non-inductive direct current motor, and the method employs a non-inductive vector control system which combines an improved rotating speed loop active-disturbance-rejection controller (ADRC) and an improved sliding-mode observer (SMO) to improve the anti-interference capability of a power system. The vector control of the brushless direct current motor at a high speed is realized by adopting an improved sliding-mode observer (SMO), and meanwhile, an active disturbance rejection controller (ADRC) is adopted by a rotating speed ring; according to the method, high-precision control is maintained, the parameter adjustment process is simplified, the implementation difficulty is reduced, the dependence on a high-precision sensor is reduced, the robustness and the anti-interference capability of the system are improved, and good stability and control precision can be maintained even under the condition that motor parameters change greatly or load fluctuation is large; the problems in the background technology are solved.

The invention provides a headlamp position adjusting system based on ripple waves of a brush direct-current motor. The headlamp position adjusting system comprises a whole vehicle height sensor and a steering angle sensor, wherein the whole vehicle height sensor and the steering angle sensor are used for collecting vehicle height and steering data in real time; the MCU control unit receives data of the whole vehicle height sensor and the rotation angle sensor and calculates the number of target rotation turns of the motor and the number of corresponding ripple pulses; the motor driving unit drives the brush direct current motor to operate; the current acquisition circuit acquires a ripple signal in the running current of the motor; the direct-current filter circuit filters direct-current components in the current signals; the ripple amplifying circuit amplifies the filtered alternating current ripple signal; and the ripple conversion circuit converts the amplified ripple signal into a pulse signal which can be identified by the MCU. The brush direct current motor is adopted to replace a traditional stepping motor, a drive circuit only needs a single full bridge, and the hardware cost is reduced by about 50%; a control circuit and a shielding wire harness in the motor are omitted, and the number of wire harnesses and connectors and the manufacturing cost are reduced.

A resistance exercise system having, in certain embodiments, a DC power supply system, a DC motor connected to the DC power supply system, a drive section connected to a drive element, a resistance delivery element connected to the drive element, and an extractable exercise resistance delivery section, a predetermined variable resistance section intermediate the DC power supply system and DC motor, an electrical condition sensor, and a variable resistance section control in communication with the electrical condition sensor and the predetermined variable resistance section. In some embodiments, the resistance exercise system includes a computing facility providing the ability to configure the exercise system to provide predetermined static or variable exercise resistance during exercise, and for example, during a positive or negative exercise stroke. Some embodiments allow users to create and, if desired, display varying and complex resistance exercise routines with or without use of resistance weights.

The invention discloses a motor speed regulation control method, a motor speed regulation control device, a vehicle, electronic equipment and a computer readable storage medium. The motor speed regulation control method comprises the following steps: acquiring a rotating speed deviation and a rotating speed deviation change rate, wherein the rotating speed deviation and the rotating speed deviation change rate are determined according to an actual rotating speed and a target rotating speed of a direct current motor; determining the duty ratio of a pulse width modulation signal of the direct current motor according to the rotating speed deviation, the rotating speed deviation change rate and a fuzzy speed regulation control algorithm; and controlling the rotating speed of the DC motor according to the duty ratio. According to the motor speed regulation control method, based on the fuzzy speed regulation control algorithm, the target rotating speed can be quickly and smoothly reached and stabilized at the target rotating speed, the response speed is higher, the overshoot is small, the load adaptive capacity is higher, and the stability and the accuracy are higher.