635 results about "DC motor" patented technology

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.

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 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 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.

This utility model relates to a noise reduction structure for a DC motor, wherein the noise reduction structure (1) is disposed within a cavity for accommodating a commutator (2) and close to the sound source. The noise reduction structure (1) can be a honeycomb structure, a square structure, a circular structure, or a regular polygonal structure, and can be disposed on the bottom surface of the cavity, or simultaneously on the sidewalls and bottom surface of the cavity. The noise reduction structures (1) can be evenly distributed on the bottom surface and sidewalls of the cavity, or staggered. In addition, the noise reduction structure (1) can also be disposed within the cavity of a gearbox (5), including at the bottom of the gearbox cavity (6), or simultaneously on the bottom and cavity walls of the gearbox cavity (6). Using this noise reduction structure for a DC motor, the sound waves generated by the sound source are effectively reflected and canceled out by the noise reduction structure, thus reducing the noise of the DC motor and possessing certain practical value.

A waved-powered UUV. The wave-powered UUV may comprise a nose and body. The nose may comprise a nose buttress plate and guide shaft. The body may comprise a body buttress plate having first and second clearance openings; linear-to-rotary power converter (LRPC) having a splined shaft attached to the nose buttress plate and longitudinally disposed through the first clearance opening; AC generator operably coupled to the LRPC; AC-DC converter electrically coupled to the AC generator; battery module electrically coupled to the AC-DC converter; DC motor electrically coupled to the battery module; propeller operably coupled to the DC motor; and guide shaft tube attached to the second clearance opening for receiving the guide shaft. The nose and body may be in a sliding relationship, and the wave-powered UUV may recharge its battery module when subject to wave energy by moving the nose relative to the body in a reciprocal linear motion.

This invention discloses an asynchronous, non-fragile H∞ control method and system for a rotating inverted pendulum, belonging to the field of robust control technology for DC motor rotating inverted pendulums. Addressing the problems of modal asynchrony, controller gain perturbation, time-varying delay, and quantization error in DC motor rotating inverted pendulum systems, this invention proposes an asynchronous, non-fragile H∞ control framework. The main steps include: constructing a Markov jump singular perturbation system model with time-varying delay and variable quantization density; designing an asynchronous, non-fragile output feedback controller for the rotating inverted pendulum, compatible with controller gain perturbation and quantization uncertainty; and deriving the linear matrix inequality conditions through modal-dependent Lyapunov functions to ensure the system's exponential stability in finite time and to meet the preset H∞ performance index. This invention can effectively improve the robustness and stability of DC motor rotating inverted pendulums under attack and parameter perturbation scenarios.

This product offers a compact, portable nebulizer that utilizes a compressor. [Solution] The nebulizer X comprises a housing 1 to which a medication cup C is attached, a pump unit 2 for supplying compressed air, and a drive unit 3 for driving the pump unit 2. The housing 1 is provided with a supply nozzle for guiding compressed air to the medication cup C. The drive unit 3 has a motor 31 for operating the pump unit 2 and a control circuit 32 for controlling the motor 31. The motor 31 is a DC motor, and the housing 1 integrally houses the pump unit 2 and the drive unit 3.

A circular saw may include a base plate and a blade guard assembly coupled to the base plate, the blade guard assembly including an upper blade guard and a lower blade guard movable between an extended position and a retracted position. A circular saw may include a housing assembly coupled to a saw blade guard assembly, an output shaft, and a saw blade clamp coupled to the output shaft, the saw blade clamp configured to hold a saw blade. The circular saw may include a brushless direct current (DC) motor positioned within the housing assembly and operable to rotate the output shaft. The circular saw may include an electronic controller configured to perform a field weakening operation on the brushless DC motor.

The present application relates to tractor combined mechanical transmission automatic gear shifting device, system and tractor, the device includes main box gear shifting execution mechanism, auxiliary box gear shifting execution mechanism, transmission, the main box gear shifting execution mechanism and auxiliary box gear shifting execution mechanism are installed on the transmission respectively, the main box gear shifting execution mechanism and auxiliary box gear shifting execution mechanism are connected with drive block and drive the drive block moves respectively, the drive block is matched with the drive groove in the transmission and carries out gear shifting.This application is mainly for the development of mechanical transmission electric control electric gear shifting control, mainly by several brushless DC motor drive realizes transmission gear shifting action, can realize gear shifting automation.

The invention relates to the technical field of heavy component hoisting equipment, in particular to an anti-swing self-adaptive balance hoisting beam for hoisting large-span heavy components, which comprises a hoisting beam main body, balance transmission components are fixedly mounted at the front end and the rear end of the hoisting beam main body at equal intervals, and a balance sensing component is fixedly mounted in the center of the top surface of the hoisting beam main body through bolts; a direct-current motor and a first hinged support are arranged in the balance transmission assembly, a winch roller is rotationally installed in the first hinged support, the direct-current motor is in transmission connection with the winch roller, a second hinged support is arranged on the lower front portion of the winch roller, and a limiting fixed pulley is rotationally installed in the second hinged support. The anti-swing self-adaptive balance lifting beam for lifting the large-span heavy component has dynamic sensing and self-adaptive adjusting capabilities, a gyroscope sensor chip captures a lifting posture and an unbalance signal in real time, and a CPU controller accurately controls each direct current motor to adjust the length of a lifting chain and quickly counteracts the swing trend of the component; and anti-swing and dynamic balance of hoisting are fundamentally realized.

The application relates to the field of building material quality detection equipment, and particularly discloses a transfer trolley which comprises a tray, test piece bodies, a fork assembly component, a rack assembly component, a driving component and a battery, the fork assembly component is slidably connected with the rack assembly component and is arranged at the upper end of the rack assembly component, the driving component is arranged in the interior of the rack assembly body, the tray is fixedly connected with the fork assembly component and is located at one side of the fork assembly component, the number of the test piece bodies is plural, each test piece body is arranged at the upper end of the tray, and the battery is arranged at the upper end of the rack assembly component. The above structure is convenient and simple to operate, greatly improves the work efficiency, reduces the labor intensity of operators, is simple in structure, low in price and high in reliability, uses the battery and the DC motor as the driving source, is green, environment-friendly, maintenance-free and high in practicability.

This invention discloses a torque-stable two-phase brushless DC motor and its control method. The two-phase brushless DC motor includes a stator and a rotor. The stator includes a stator core and 4*n stator windings surrounding the stator core. The rotor includes a rotor core and 6*n permanent magnet poles surrounding the rotor core, where n is a positive integer, and adjacent permanent magnet poles have opposite polarities. This invention features high stator winding utilization efficiency, reduces the weight of the brushless DC motor, and exhibits low torque ripple, making it suitable for applications requiring continuous power output.

1. Name of the designed product: Controller (brushless DC). 2. Use of the designed product: Controller for brushless DC motor. 3. Design points of the designed product: in shape. 4. Picture or photo that best shows the design points: perspective view.

The invention provides a gear shifting control method and system and a vehicle, the gear shifting control method is used for a vehicle driving system provided with a gear shifting actuator set to be a brushless direct current motor, and the gear shifting control method comprises the following steps that a current target gear is obtained according to gear shifting operation of a user, and a current shifting fork position is obtained; in response to the situation that it is judged that the position of the shifting fork is not changed after the preset gear shifting time, the gear shifting actuator is switched into a non-inductive control mode; whether a rotor of the gear shifting actuator can rotate normally or not is judged; and if not, it is judged that mechanical clamping stagnation happens to the driving system, and gear shifting is not conducted any more, and if yes, it is judged that electric control clamping stagnation happens to the driving system, and the driving system is switched to the target gear from the current actual gear through a gear shifting actuator in the non-inductive control mode.

The utility model relates to the technical field of lubricating oil filling, and discloses a subway train lubricating oil intelligent filling device which comprises a cabinet body, an oil drum is installed at the bottom end in a cabinet body cavity, and a serial port display screen, a self-reset switch and an emergency switch are arranged at the top end of the cabinet body. The execution module comprises a direct-current brushless motor and a bidirectional gear pump; the control module comprises a single chip microcomputer and a double-gear rotary switch; the power module comprises a graphene lead-acid battery pack, a double-control air switch and a power adapter; and a signal acquisition module. The signal collecting module is used for collecting information of all the modules, the power module is used for supplying power, the control module is used for operating and controlling equipment, the execution module is used for controlling in and out of lubricating oil, all the modules are matched with one another through the reasonable structural design, and the device is small in structure, high in oil injection efficiency and high in use convenience.

The application provides a brush DC motor driving control system and a control method. The brush DC motor driving control system comprises a microcontroller and a driving circuit. The input ends of the driving circuit are connected with a power supply of a target voltage and the output end of the microcontroller respectively. The output end of the driving circuit is connected with a brush DC motor with a rated voltage lower than the target voltage. The microcontroller controls the conduction and turn-off of a switch tube in the driving circuit by adjusting the duty cycle of a PWM signal, so as to drive the brush DC motor to adjust the rotating speed. The application directly drives a low rated voltage motor by using a high voltage power supply without using an independent step-down converter, reduces the electric energy conversion links, reduces the number of components, reduces the size of the circuit board, and effectively reduces the system cost. At the same time, the application avoids the superimposed loss generated by the two-stage cascade of the step-down conversion and the motor driving, the energy transmission path is shorter, and the overall efficiency is significantly improved.

To construct a portable and inexpensive massage machine that allows the person being treated to sit in a simple chair and easily receive back massage. [Solution] The massage machine 10 comprises a cover member 14 made of a stretchable material and having a strip-shaped member 14C that extends longitudinally in the center between an upper end 14T and a lower end 14B; a housing 30 having a housing section 30A that accommodates a treatment block 20 comprising a back shell 22, a pair of rails 18A and 18B, a pair of massage ball units 32A and 32B comprising massage balls 32, and a tapping ball unit 16, and the upper part of which is covered when the cover member 14 is attached; a controller 100 that controls the operation of a brushless motor 70 and a brushed DC motor 48 in the treatment block 20; and a remote controller 40 that sends and receives bidirectional signals to and from the controller 100.

This utility model relates to the field of water heater technology and discloses a silent electric water heater with a servo valve and a DC motor water pump linked together. It includes a housing, within which are an inlet pipe, an outlet pipe, and an electric heating element. The electric heating element has an inlet and an outlet. The inlet pipe is connected to the inlet, and the outlet pipe is connected to the outlet. A control valve and an electric water pump are connected to the inlet pipe, which has an inlet end for connecting external water. The electric water pump is connected between the control valve and the electric heating element. Water flowing in from the inlet end flows sequentially through the control valve, the electric water pump, and the electric heating element. This silent electric water heater with a servo valve and a DC motor water pump linked together achieves control over the water output through the cooperation of the servo valve and the DC motor water pump. It is less susceptible to interference from magnetic fields and electromagnetic radiation, operates stably, has low noise, and provides a superior user experience. The internal parts of the housing are rationally arranged, with a compact structure and small size, making it easy to install.

The invention provides an electric or foot-operated dual-purpose portable pole climbing device. The electric or foot-operated dual-purpose portable pole climbing device is composed of a lifting frame, a power assembly and a control seat frame. The lifting frame is composed of a fork-shaped component, a half-frame-shaped telescopic arm and a waist drum-shaped roller. The power assembly is composed of a U-shaped support frame, a driving shaft, a set of chain wheel set, a direct current motor, a pair of pedal arms which are in bilateral symmetry, a pair of fishtail tooth ratchet wheels and front and rear pawls matched with the fishtail tooth ratchet wheels. The control seat frame is composed of a flat tube seat frame, a telescopic tube and a seat, the control frame is installed on the seat, a control handle and a motor switch are installed on the control frame, the control handle controls separation or buckling of the front pawl and the rear pawl and controls forward rotation and reverse rotation of the two ratchet wheels at the same time, and the motor switch controls starting and stopping of the direct current motor. A set of chain wheel set drives a conical friction wheel to achieve forward rotation and reverse rotation, up-down movement of a pedal arm and rotation of a direct current motor are converted into up-down climbing of the climbing pole device, and the electric and foot-operated dual-purpose climbing pole device has an electric input function and a foot-operated input function and can be operated independently and switched mutually; therefore, energy is saved. A worker can work in a standing posture or a sitting posture, and the labor intensity is reduced.

The utility model discloses a testing fixture wear degree detection device, which relates to the technical field of testing fixture detection and comprises a bottom plate, an upper plate and a support are fixedly arranged on the upper surface of the bottom plate, vertical blocks are symmetrically and fixedly arranged on the upper surface of the upper plate, and a moving block is slidably arranged between two corresponding vertical blocks. Wherein a lead screw is rotationally arranged between the two corresponding vertical blocks, a servo motor is fixedly arranged on the outer side of one vertical block, the output end of the servo motor penetrates through the vertical block and is fixedly connected with the lead screw, the outer surface of the lead screw is connected with one moving block in a threaded and sleeving mode, and a moving plate is fixedly arranged on the upper surface of the moving block; according to the testing fixture wear degree detection device provided by the utility model, through the servo motor, the lead screw and the electric sliding block, precise regulation and fine adjustment of the horizontal position of the detection assembly are realized, the detection precision is greatly improved, and the testing fixture wear degree detection device can be adapted to different testing fixtures; and the direct current motor, the gear and the toothed plate drive the clamping plate to stably clamp the gauge, so that the detection stability is guaranteed.

The utility model discloses a brush DC motor, including the casing, the inside of casing is provided with heat abstractor, and heat abstractor includes the fixed cylinder of setting in the inside of casing, the side surface inner wall fixedly connected with brush DC motor body of fixed cylinder, and one end of brush DC motor body is fixedly connected with the output shaft, and the other end of output shaft extends to the outside of casing, and the circumferential side surface inner wall and the outer wall of casing are evenly provided with the through groove between, and the both sides inner wall of through groove is slidably connected with the heat conduction plate, and the bottom of heat conduction plate extends to the inside of fixed cylinder, the utility model discloses the heat conduction plate of setting, and brush DC motor body drives the output shaft rotation when working, and the fan blade is driven to rotate by output shaft, and the airflow is driven to flow by fan blade, and the airflow is flowed through heat conduction plate after entering the casing, and heat conduction plate conducts and radiates the heat of brush DC motor body to the airflow, makes the airflow carry heat and leave the device while insulating brush DC motor body.

The application relates to the field of bearing ball preparation, and discloses a forming die and a preparation process of a thermal shock-resistant silicon nitride ceramic bearing ball, which comprises a die base, a DC motor is installed at the top of the die base, a transmission rod is rotationally connected to the top of the die base, a guide rod is fixedly connected to the top of the die base, the output end of the DC motor is fixedly connected with one end of the transmission rod, a guide screw is fixedly connected to one end of the transmission rod, and a sliding frame is threadedly connected to the outside of the guide screw. The die plate is arranged to slide on the top of the mounting base through the sliding T block, and is limited through the limiting block; when the user pushes the push block, the limiting block can be retracted into the limiting body, the die plate can be conveniently disassembled, disassembled and installed, the die plate can be conveniently disassembled, replaced and cleaned, and the problem of inconvenient disassembly and installation of the die plate is solved.

This utility model discloses a cantilever-type door opening device for freeze-drying equipment, relating to the field of food processing technology. It includes: a support device for providing a cantilever and increasing the range of motion; a sliding device whose outer wall is slidably connected to the outer wall of the support device; and an opening and closing device whose top outer wall is fixedly connected to the bottom outer wall of the sliding device. The opening and closing device includes a fixed plate, a DC motor mounted on the outside of the fixed plate, a first rotating rod fixedly connected to the output end of the DC motor, a first linkage rod rotatably connected to the outer wall of the first rotating rod, a positioning block rotatably connected to the outer wall of the first linkage rod, a closing door fixedly connected to the outer wall of the positioning block, a second rotating rod rotatably connected to the outer wall of the positioning block, and a second linkage rod rotatably connected to the outer wall of the second rotating rod. By setting up the opening and closing device, the opening and closing actions are smooth and accurate, reducing the labor intensity and time cost of manual operation, and ensuring stable and reliable operation.

The utility model discloses a goods sorting conveyor line, relates to the conveyor belt technical field, including sorting equipment, conveyor line and one-way direct current motor, said conveyor line includes multi-segment conveyor belt, between every two conveyor belts there is installed photoelectric sensor, one end of conveyor line is located at the goods outlet of sorting equipment, and the other end of conveyor line is located at the one-way direct current motor. A swing wheel disc is installed at the other end of the conveying line, and conveying rollers are fixedly installed on the two sides of the swing wheel disc. Through arrangement of the sorting equipment, the conveying belt and the photoelectric sensor, when the photoelectric sensor senses the goods, the conveying belt can be controlled by the control device to rotate to convey the goods, and when the photoelectric sensor does not sense the goods, the conveying belt enters a dormant state, so that the purpose of saving energy can be achieved.

The invention relates to the field of electric hoists, and discloses a traction and hoisting dual-purpose direct current lithium battery type traction machine which comprises a traction machine body, a rope drum arranged in the traction machine body and a steel wire rope wound on the rope drum, and further comprises a brake mechanism, a traction mechanism, a hoisting mechanism and a hoisting mechanism, and the rotation of the rope drum is controlled by a permanent magnet brushless direct current motor arranged on the traction machine body; the self-locking device is in transmission connection between the output end of the permanent magnet brushless direct current motor and the rope drum and can be self-locked when the rope drum is to be driven to rotate reversely by external force so as to prevent the rope drum from rotating reversely; the wire arranging mechanism is provided with a guide part capable of guiding the steel wire rope in the axial direction of the rope drum, a brake mechanism arranged in the wire arranging mechanism can prevent the rope drum from rotating reversely under the action of external force, so that a traction machine can stably and vertically hoist a heavy object in the air, and the arranged wire arranging mechanism can guide the winding of the steel wire rope; when the tractor horizontally drags a heavy object, the steel wire rope can be tidily wound on the rope drum, so that the tractor realizes the dual purposes of traction and hoisting.

The invention belongs to the technical field of automobile electronics, and discloses an automobile window relay adhesion fault detection and motor protection method, which comprises the following steps: S1, calibrating a current value when voltages at two ends of a bidirectional direct current motor are zero, namely a shutdown calibration value; s2, when the vehicle window normally stops driving, the current of the bidirectional direct current motor is detected; s3, protecting the bidirectional direct current motor; when the relay has an adhesion fault, setting a fault mark, and regulating relay contacts at two ends of the bidirectional direct current motor to be high level through the MCU, so that the bidirectional direct current motor stops at the high level; and S4, in the adhesion protection period, whether the adhesion fault is recovered or not is judged by periodically clearing the adhesion fault mark, and if the fault is not recovered, the fault mark is reset. According to the method, the accuracy of relay adhesion fault detection is improved, and meanwhile, the motor can be protected without installing other monitoring and regulating equipment.