2114 results about "DC motor" patented technology

The invention relates to the field of PID control, and provides a tread calender rotating speed PID control method and system, a storage medium and equipment. The tread calender rotating speed PID control method comprises the following steps: processing an initial solution space of a plurality of to-be-optimized parameters based on Logistic-Tent chaotic mapping and dynamic reverse learning to obtain an initial population matrix of a Sabot swarm algorithm; according to the evaluation function, calculating the initial fitness of the soloat group individuals, and updating the global optimal position of the soloat individual with the optimal fitness to the current optimal position; executing a salmons swarm algorithm, and searching the to-be-optimized parameters by simulating a search behavior or an attack behavior of a salmons; in the process of executing the sodat swarm algorithm, if it is judged that the algorithm enters a development stagnation state, executing a transverse crossing strategy and a longitudinal crossing strategy to enable the algorithm to get rid of the development stagnation state; and when a set termination condition is satisfied, outputting a solution corresponding to the current optimal position, and controlling the direct current brushless motor. The method can improve the response speed.

The invention relates to the technical field of control and regulation, in particular to a high-power direct current motor control and regulation method, which comprises the following steps of: acquiring an output voltage, an input voltage, an output current, temperature data and rotating speed data of a motor to be regulated in a current time period; determining a current load deviation factor and a current rotating speed deviation factor; acquiring a historical load deviation factor and a historical rotating speed deviation factor, and determining a current error increment according to the current load deviation factor, the historical load deviation factor, the current rotating speed deviation factor and the historical rotating speed deviation factor; correcting the proportional gain at the current moment according to the temperature fluctuation difference between the current time period and the previous time period and the current error increment; and controlling and adjusting the to-be-adjusted motor according to the target proportional gain. According to the invention, control and adjustment of the high-power DC motor are realized, and the rationality of proportional gain setting and the rationality of control and adjustment of the high-power DC motor are improved.

The invention discloses equipment for detecting the construction quality of a supporting structure of an expressway tunnel and a control method of the equipment, and relates to equipment for detecting the construction quality of a wall tunnel of the supporting structure of the expressway tunnel during the construction period. An electric push rod is controlled to drive a motor to rotate to ensure that the radar antenna is tightly attached to the tunnel wall surface, and direct-current brushless motors at joints are driven to rotate by observing the tunnel wall surface to prevent the radar antenna from colliding with obstacles such as reinforcing steel bar heads on the wall surface. The method can effectively avoid obstacles on the wall surface of the supporting structure in the tunnel construction period in the detection process, guarantees that the radar antenna is constantly attached to the wall surface of the tunnel in the detection state, solves the problem that the surface of the tunnel lining is uneven in the construction period, and can obviously improve the detection efficiency and quality compared with a traditional detection technology. The method has good environment adaptability, and it is ensured that a detection instrument and the lining surface are always in a good contact state under the complex environment condition.

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 utility model discloses a novel reclosing circuit breaker, which comprises a one-way direct current motor, a transmission mechanism and a control assembly, and is characterized in that the control assembly is used for controlling the one-way direct current motor to start and stop; the side walls comprise two long side walls, the control assembly is arranged near one long side wall, and the transmission mechanism is arranged between the control assembly and the other long side wall; the transmission mechanism comprises a reduction gear set, an eccentric wheel and an output sliding block. The input end of the reduction gear set is connected with the output part of the one-way direct current motor; the output end of the reduction gear set is connected with the eccentric wheel; the eccentric wheel is rotatably arranged, the output sliding block is slidably arranged, the eccentric wheel is connected with the output sliding block to drive the sliding block to move, and the eccentric wheel acts on the output sliding block to make the output sliding block reciprocate through continuous output of the one-way direct current motor; the output sliding block is sleeved on the extending end of the handle, and the opening operation and the closing operation of the handle are realized through the reciprocating motion of the output sliding block; the utility model has the characteristics of more compact structure and miniaturization.

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.

The invention relates to the technical field of direct current motors, and particularly discloses a direct current brushless motor driving method. A central electric signal, a first electric signal, a second electric signal and a third electric signal of a motor stator winding are analyzed by using a signal processing and analysis algorithm based on deep learning, so that implicit features in each electric signal are captured; and after difference calculation is carried out on the center electric signal feature and other electric signal features, query code representation of the rotor rotation position is obtained in a feature query matching mode, so that the rotor rotation position is determined. Therefore, accurate judgment on the rotation position of the rotor can be realized through artificial intelligence and a deep learning algorithm, and the influence of noise interference and external condition change is reduced not only through a hardware component mode, so that the flexibility and generalization ability are improved through a more intelligent direct current brushless motor driving mode.

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).

An apparatus includes a power converter to convert incoming alternating current (AC) mains power into a direct current (DC) voltage. A linear AC pump of the apparatus has an arm that reciprocates linearly back and forth to move a pair of diaphragms to pressurize air that is output from the linear AC pump. The apparatus also includes a DC motor driver having an H-bridge that receives the DC voltage from the power converter as an input and that generates a square wave as an output that is coupled to the linear AC pump to drive the arm back and forth. The pressurized air from the linear AC pump is used to inflate one or more bladders of an air mattress, for example.

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 belongs to the field of driving actuators, and provides a linear driving actuator integrated with a direct current motor module, which comprises a shell, a driving rod and a driving assembly. Wherein an accommodating cavity and a guide hole which is communicated with the accommodating cavity and penetrates through the shell are formed in the shell; the driving rod penetrates through the guide hole and extends into the containing cavity, and the driving rod is further connected with the guide hole in a sliding mode and can move relative to the shell in the axial direction of the driving rod. The driving assembly comprises a spiral body and a motor detachably installed in the containing cavity, the spiral body forms an internal thread coaxial with the driving rod and is in threaded connection with the driving rod through the internal thread, the spiral body is further connected with a rotor of the motor and can be driven by the motor to rotate, and the axial direction of the internal thread is coaxial with the rotating center axis of the rotor.

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 invention discloses an amphibious bionic robot which can travel both land and air. The robot is provided with a depth camera swing mechanism, a rotor flight motion mechanism and a foot-like land motion mechanism. The depth camera swing mechanism is provided with a rotating hinge seat, a swing servo is provided on the inner side of the rotating hinge seat, the swing servo is connected to a swing arm, and a depth camera sensor is provided on the swing arm. The rotor flight motion mechanism is provided with a rotor frame, six groups of machine arm shafts are provided in the rotor frame, brushless DC motors are provided on the machine arm shafts, and rotor units are provided on the brushless DC motors. The foot-like land motion mechanism is provided with a chassis, a coordination controller and a land motion controller are installed in the chassis, and a flight controller is provided above the chassis. The robot of the invention has the functions of land crawling motion, flight motion and visual reconnaissance, and has the functional characteristics of visual reconnaissance and integrated land and air operation, thereby improving the robot's adaptability to various complex terrains and ensuring the robot's stability.

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 belongs to the field of oilfield separated layer water injection. The invention discloses an improved particle swarm optimization neural network PID (Proportion Integration Differentiation) separated layer water injection flow control method, which specifically comprises the following steps of: collecting underground water injection layer section flow through a flow meter, uploading the underground water injection layer section flow to a neural network PID controller through a data processing module, proposing a group fitness variance strategy, setting a variance threshold value, and if the variance is smaller than the threshold value, controlling the flow rate of the underground water injection layer section. In order to drive particles to continue searching, a new weight updating formula is provided in combination with a tanh function, a neural network PID is optimized after a particle swarm algorithm is improved, a signal is sent to control a direct current motor to drive a transmission mechanism to enable a water nozzle to reach a proper opening degree, and accurate control over the water injection flow is achieved. According to the method, the optimal solution of PID is approached by improving the global optimization ability of the particle swarm algorithm and the rapid solution of the BP neural network, the control precision and robustness are improved, and the waste of resources is reduced.

The utility model provides a dual-redundancy control system of a steering engine. The dual-redundancy control system comprises a CAN bus module, a first information processor module, a second information processor module, a first signal isolation module, a second signal isolation module, a first motor driving circuit module, a second motor driving circuit module and a dual-redundancy direct current motor. Compared with the prior art, stable redundancy switching is achieved, it is guaranteed that the steering engine and the steering engine controller can still work when multiple fault points occur, and the task reliability of the steering engine and the steering engine controller is improved to the maximum degree.

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.