1132 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 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.

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.

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 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 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 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 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 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.

The invention discloses a high-efficiency energy-saving DC brushless motor, and relates to the technical field of DC brushless motors, the high-efficiency energy-saving DC brushless motor comprises a front end cover body and a rear end cover body which form a brushless motor body, and a machine body shell is fixedly installed between the front end cover body and the rear end cover body; a dust blocking mechanism is arranged in the front end cover body, the dust blocking mechanism comprises a dust blocking circular frame, and dust blocking partition plates are arranged in the dust blocking circular frame in an equal-angle sliding mode. A heat dissipation mechanism is arranged at the rear end of the rear end cover body, and heat dissipation circulating pipes are installed at the front end of the circulating water tank at equal angles in a penetrating mode. According to the high-efficiency and energy-saving type direct-current brushless motor, the brushless motor body runs to drive the dust blocking filter plate to be opened, so that the rotating dust partition plate drives the dust blocking filter plate to clean dust in a repelling manner, and meanwhile, the heat dissipation mechanism extracts heat at the corresponding drainage channel and the heat dissipation circulating pipe through negative pressure so as to assist in cooling and heat dissipation; the energy consumption of the brushless motor body is reduced and the operation efficiency is improved.

An underground visual electric fishing tool comprises a visual electronic control short section, a visual transmission control short section and a visual grabbing short section. The visual electronic control short section comprises a wide-angle camera and a clamping jaw connected with the wide-angle camera; the visual transmission control short section comprises a direct current motor used for being in linkage with opening and closing of the clamping jaw mechanism. The visual electronic control short section realizes control and information interaction with the ground; underground videos, mechanical parameters and tool states are transmitted in real time through a visual electronic control short section to construct a man-machine interaction closed loop, ground interaction and command and action real-time correction are supported, and a'perception-decision-execution-feedback 'closed loop is formed; tool poses are corrected in real time in combination with images in the cable lifting process; after clamping, slippage / overload is automatically prevented through a closed-loop algorithm, manual decision-making flexibility is reserved, the precise execution capacity of a machine is guaranteed, and the success rate of single operation is increased.

Method for operating a circuit arrangement as part of a BEMF zero crossing identification operation, which serves as the basis for sensorless commutation of a brushless DC motor, wherein the circuit arrangement has at least one comparator and a microcontroller, wherein the comparator is designed to compare a phase voltage or terminal voltage of the brushless DC motor with a star point voltage (reconstructed via the terminal voltages or directly tapped off) of the brushless DC motor and to output a corresponding comparator signal to a signal path of the microcontroller, which signal path is connected to the comparator, wherein the signal path of the microcontroller and / or microcontroller pin, which signal path is connected to the comparator, is periodically switched over between an input mode and an output mode.

The invention provides an air energy heat pump direct current motor intelligent speed regulation method and system based on self-adaptive fuzzy control. The method comprises the steps of obtaining original operation data; extracting dynamic characteristics of a short-time window from the original operation data set, and calculating to obtain a thermal load trend index; constructing a fuzzy controller, wherein the fuzzy controller comprises fuzzification, rule reasoning and defuzzification output; in the fuzzification, a thermal load trend index is mapped into a five-level fuzzy level by adopting a triangular membership function; combining the thermal load trend index with an operation mode to calculate a target wind speed; and the target wind speed is converted into a control signal, feedback data is collected after each regulation and control period is finished, a performance deviation index is constructed based on the feedback data, and correction parameters are output. According to the invention, a resonance frequency point avoidance mechanism and a voltage margin correction strategy are embedded, so that the system is kept stable, low in noise and high in efficiency under high-speed, low-speed or medium-speed operation conditions.

The invention discloses an SMO-EKF brushless direct current motor position-free control method based on SBA-GWO double-layer optimization, SMO adopts sliding mode surface gradient-rotating speed double-factor segmented gain, and an improved SBA-GWO algorithm is combined with a global exploration mechanism of a stingless bee algorithm and a group cooperation characteristic of a grey wolf optimization algorithm. An elite initialization strategy and a dynamic search mode switching mechanism based on a grey wolf level are introduced, and an SBA-GWO algorithm is adopted for parameter optimization: in the first layer, SMO counter electromotive force THD is taken as fitness, and optimal gain is searched; in the second layer, the EKF estimation error quadratic sum is used as the fitness, and the Q / R adaptive residual noise time-varying property is optimized. And constructing an SMO-EKF cooperative control closed loop according to the optimized parameters to realize brushless direct current motor position-free control. Compared with the prior art, in the BLDC full-rotating-speed-domain position-free control, the dynamic response speed and the steady-state buffeting suppression effect are both considered, the robustness and the engineering realizability are remarkably improved, a physical sensor is not needed, and the engineering cost is low.

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 discloses a self-adaptive control system based on a cutting anastomat, and relates to the technical field of medical instrument control, and the system comprises an intelligent hardware module which is used for analyzing a motion control instruction based on an MCU (Microprogrammed Control Unit), receiving a PWM (Pulse Width Modulation) signal by a DC motor driver, and starting a tool bit to advance according to a preset acceleration curve; the TACS module analyzes the tissue state based on sensor data and dynamically adjusts the rotating speed and cutting force of a motor; and the man-machine interaction visualization module is used for carrying out visual and clear graphical and digital presentation, including electric quantity, anastomosis pressure and cutting progress, on the basis of an electronic display screen. The MCU serves as the core, the tool bit is controlled to advance according to the preset curve through PWM signals, it is ensured that the cutting action is accurate and stable, the equipment loss and the tissue damage risk are reduced, the TACS module analyzes the tissue state in real time and dynamically adjusts the motor rotating speed and the cutting force through a sensor, the cutting effect can be ensured for tissue with different hardness and thickness, and the cutting efficiency is improved. Healthy tissues can be protected, and the operation safety and efficiency are improved.

The utility model provides an efficient energy-saving cooling fan pressurizing structure, which belongs to the technical field of cooling fans and comprises a radiator, and a cooling fan mechanism is arranged at the top of the radiator. Air can be guided to more smoothly enter the cooling fan mechanism through the flow guide cover, air inlet resistance is reduced, energy can be more efficiently utilized when the brushless direct-current motor drives the pressurizing blades to rotate, air can flow out uniformly due to the special shape of the pressurizing blades, turbulent flow is reduced, energy loss is reduced, and the service life of the cooling fan is prolonged. Attack angles of the pressurizing blades at different radiuses can be kept in a proper range, the pressurizing blades adapt to circumferential speed differences of air at different radiuses, the air can flow out of the cooling fan mechanism more uniformly, the turbulence phenomenon of the air is reduced, energy loss is reduced, the efficiency of the cooling fan mechanism is improved, and the service life of the cooling fan mechanism is prolonged. And a better pressurizing effect can be realized in a limited space.

According to the plasma welding device for the electric pressure test pump shell, intelligent welding is achieved through cooperation of hardware and software. Hardware comprises a moving and rotating mechanism composed of a master console, a straight line and a direct current motor to control the plasma welding device, and a bearing mechanism with magnetic attraction is used for stabilizing the shell. The software comprises a welding parameter self-adaption module, and parameters are automatically adapted and optimized according to shell attributes; the welding seam path planning module generates an accurate path according to the model or manual input; the real-time monitoring and early warning module monitors the welding temperature, the arc stability, the position of a plasma welder and the like and regulates and controls the welding temperature, the arc stability and the And the equipment state management module monitors equipment in real time, diagnoses faults and pushes maintenance suggestions. The device solves the problems that a traditional device is difficult in parameter adaptation, low in path planning efficiency and poor in precision, and not intelligent in process monitoring and equipment management, parameter optimal configuration and path precise planning are achieved, the welding quality stability, the operation efficiency and the equipment reliability are improved, and the efficient production requirement of the modern industry is met.

The invention relates to the technical field of unmanned aerial vehicles, in particular to an energy control method, system and equipment for a heavy oil hybrid power unmanned aerial vehicle, and the method comprises the steps: recognizing a current working condition based on the flight state parameters of the unmanned aerial vehicle collected by a sensor, and if the flight height change rate is greater than or equal to a preset change rate and lasts for a first preset time period, starting a controller; if yes, identifying the current working condition as a take-off working condition; if the flight height change rate is smaller than the preset change rate and lasts for a second preset time period, identifying the current working condition as a cruise working condition; the flight state parameter comprises a flight height change rate; when the unmanned aerial vehicle is in a take-off working condition, the power generation all-in-one machine is started to cooperatively supply energy with the energy storage device, and power is provided for the brushless direct-current motor; and when the unmanned aerial vehicle is in a cruise working condition, the power generation all-in-one machine is started to output in two paths, one path drives the brushless direct-current motor, the other path charges the energy storage equipment, power requirements of different stages are matched through a differential energy supply strategy, and the energy utilization rate and the endurance time of the unmanned aerial vehicle are improved.

An automatic toilet bowl covering device is provided. The device is comprised of an automatic toilet bowl covering device designed to enhance bathroom hygiene by deploying a flexible, multi-layered cover over the toilet bowl opening during flushing to prevent the dispersion of airborne waste particles. The cover comprises hydrophobic, oleophobic, and antimicrobial layers for durability, cleanliness, and odor control, with accordion-style folds and elastic edging ensuring secure deployment and retraction. A motorized mechanism powered by a brushless DC motor smoothly operates the cover along guide tracks, while sensors automate the system based on user movement, lid position, and flushing activity. A UV-C light sterilizes the cover post-use within a storage compartment.

The utility model relates to the technical field of motors, in particular to a novel brushless direct current motor, which comprises a rotor assembly (100), a stator assembly (200), a first end cover (300) and a second end cover (400), the rotor assembly (100) comprises a rotor (101), a rotor shaft sleeve (102) and rotor magnetic steel (103), and the rotor shaft sleeve (102) is made of aluminum materials; the second end cover (400) is provided with a Hall plate (500), and the Hall plate (500) is provided with three surface-mounted Hall elements (501) used for sensing the rotor magnetic steel (103). Due to the adoption of the structural design, the rotor shaft sleeve of the rotor assembly is made of an aluminum material, so that the distribution of magnetic lines of air gaps in the motor is changed, and the problems of large cogging torque and noise of the motor are effectively solved; a Hall element on the Hall plate directly induces motor rotor magnetic steel in a patch mode, so that the reliability of the motor is greatly improved, the structure is simplified, and assembly is facilitated.

A power tool with a combined printed circuit board (PCB) that reduces internal wiring of the power tool and provides a large amount of air flow to internal components. In some instances, the combined PCB has a surfboard shape and includes a motor control unit and power switching elements (Field Effect Transistors or FETs). The combined surfboard PCB is located above the trigger, but below the motor and drive mechanism. In other instances, the combined PCB has a doughnut shape and is located coaxially with a motor shaft. The combined PCB may be positioned between a doughnut-shaped control PCB and the motor.