69 results about "Dc drive" patented technology

The invention provides a motor controller for realizing fault isolation, a distributed power assembly and a vehicle. The motor controller comprises a three-phase bridge arm, a direct current breaker, an alternating current breaker and a control device. Wherein the two ends of the three-phase bridge arm are used for being connected with a power battery through a direct-current bus, and the middle point of each phase of bridge arm in the three-phase bridge arm is used for being connected with a phase winding of the driving motor. The control devices are used for connecting the direct-current driving module and the alternating-current driving module through internal lines, and one control device is used for controlling the direct-current driving module to drive the direct-current breaking module to connect or disconnect the connection between the three-phase bridge arm and the direct-current bus; and the control module is used for controlling the alternating current driving module to drive the alternating current breaking module to connect or disconnect the bridge arm midpoints of the at least two phases of bridge arms and the at least two phases of windings, so that faults of the power assembly can be isolated, normal operation of other electric parts of the electric vehicle is guaranteed, and the safety throwing rate of the vehicle is reduced.

A motor power source regulation circuit, a control method and an electronic device are provided. The motor power source regulation circuit includes a power factor correction circuit, an isolation circuit, a first power source conversion circuit, a second power source conversion circuit and a control circuit. The isolation circuit includes a first switch sub-circuit and an isolation transformer. The power factor correction circuit regulates an AC input signal to a first DC signal. The first switch sub-circuit converts the first DC signal to a first AC signal. The isolation transformer converts the first AC signal to two or more second AC signals. The first power source conversion circuit converts the second AC signal to a DC drive signal and outputs it to a DC motor. The second power source conversion circuit converts the second AC signal to an AC drive signal and outputs it to an AC motor.

This utility model relates to the field of drive device technology, specifically to a DC-driven air-film rotary structure, including a fixed base and a rotating disk rotatably mounted on the fixed base; the fixed base is equipped with a drive motor; the output end of the drive motor is equipped with a drive gear; a driven gear ring is coaxially mounted on the rotating disk; the outer wall of the drive gear meshes with the inner wall of the driven gear ring; the rotating disk is equipped with a first limiter and a second limiter within the driven gear ring; the first limiter and the second limiter are respectively located on both sides of the drive gear. This utility model, through the limiting action of the first and second limiters, causes a change in the current of the drive motor, thereby realizing the voltage and current direction of the drive motor through the first and second on / off modules, enabling the reciprocating rotation of the rotating disk and rotating parts using a DC power supply.

An ice making device includes an ice making tray, an output part which is connected with the ice making tray and turns the ice making tray, a motor which is a drive source of the output part, a first board having a converter which converts alternating current to direct current, and a second board connected with a part which is operated by the direct current. The second board includes a control part which controls an operation of the ice making device, and the first board and the second board are connected with each other by inter-board connectors.

The novel electric flat transport vehicle comprises a vehicle body and a track, the vehicle body comprises a carrying plate, a driving system and a guiding device, and the driving system and the guiding device are arranged below the carrying plate; the driving system comprises a driving motor connected to the bottom of the carrying plate and a reversing machine connected with the output end of the driving motor. Output shafts, rotating in the same direction, on the two sides of the reversing machine are connected with reduction gearboxes respectively, and the output ends of the two reduction gearboxes are connected with the driving wheels respectively; the two driving wheels are arranged in parallel and can roll and walk on the track; a follow-up wheel is arranged in front of the bottom of the carrying plate; a guide device is arranged on one side, close to the middle of the carrying plate, of the driving wheel and the follow-up wheel; a power supply mode of the flat transport vehicle is upgraded to a storage battery power supply mode, and a power supply cable is omitted. A direct-current driving motor is adopted, a control box is additionally arranged, torque is increased through a speed reducer, finally single-motor driving is upgraded, and running synchronism and stability of the transport vehicle are improved. A guide device is added to solve the problem of running jamming of the trolley.

The present invention discloses an electromagnet drive control method. Starting at time t0, when the electromagnet's DC drive power supply is turned on, the electromagnet's magnetic flux Ψ is observed in real time based on the DC drive power supply voltage. At any time t1 before reaching a preset time t2, the electromagnet's magnetic flux integral value from t0 to t1 is calculated in real time, and the magnetic flux integral value from t1 to t2 is predicted, thereby obtaining an estimated magnetic flux integral value from t0 to t2. If the estimated magnetic flux integral value is greater than or equal to a preset magnetic flux integral threshold, the electromagnet's DC drive power supply is immediately shut off. Otherwise, the electromagnet's DC drive power supply is shut off at time t2. The present invention also discloses an electromagnet drive control device and a hybrid automatic transfer switch. Compared to existing technologies, the present invention can effectively reduce the hardware circuit complexity, system cost, and volume while maintaining the performance of the hybrid automatic transfer switch.

The invention discloses a high-precision linear motion direct-current driving system for spaceflight and a control method of the high-precision linear motion direct-current driving system, and relates to the technical field of spacecraft attitude driving control. The high-precision linear motion direct current driving control method for spaceflight comprises the steps of linear direct current motor response aging judgment, spacecraft driving load evaluation and spacecraft driving signal optimization. According to the method, the driving load influence evaluation requirement is determined through command signal response timeliness judgment, if the driving load influence evaluation requirement does not exist, the spacecraft attitude adjustment process continues to be monitored, otherwise, the driving load optimization requirement continues to be determined, and finally if the driving load optimization requirement exists, the oscillation signal influence quantification requirement continues to be determined. Otherwise, the oscillation signal optimization requirement is directly determined after the oscillation signal influences quantification, the spacecraft linear motion direct current driving stability is improved, and the problem that in the prior art, spacecraft linear motion direct current driving is not stable due to the spacecraft attitude adjustment load requirement difference is solved.

The invention discloses a driving voltage automatic pumping circuit and method suitable for a power device. The driving voltage automatic pumping circuit comprises a direct current driving voltage source VCC, a first driving circuit, a pumping circuit, a second driving circuit and an auxiliary power device A2. The direct current driving voltage source VCC is connected with the second driving circuit; the output end of the first driving circuit is used for being connected with the grid electrode of the main power device A1. The output end of the second driving circuit is connected with the grid electrode of the auxiliary power device A2; the pumping circuit is respectively connected with a pin parasitic inductor LS of a power source S end of the auxiliary power device A2, a direct current driving voltage source VCC and the first driving circuit; when the main power device A1 is overloaded, the first driving circuit, the pumping circuit, the second driving circuit and the auxiliary power device A2 cooperate with each other according to a predetermined strategy, and a driving voltage signal output by the first driving circuit is pumped to a predetermined amplitude. According to the invention, automatic pumping of the driving voltage of the high-power device can be realized.

The invention discloses an MEMS electrostatic stiffness-damping regulation and control method, and belongs to the technical field of MEMS. The MEMS parallel plate capacitor structure and the RC element are connected in series to form an electrostatic rigidity-damping regulation and control element, and a pair of direct current driving voltage, alternating current driving voltage and carrier wave voltage with opposite symbols is applied to two groups of fixed polar plates of the differential parallel plate capacitor structure, so that displacement detection and resonance driving of an MEMS device can be realized at the same time; and the equivalent static stiffness and the equivalent static damping of the MEMS device can be regulated and controlled by adjusting the parameters of the MEMS parallel plate capacitor structure, the parameters of the RC element, the direct current driving voltage or the alternating current driving voltage. The MEMS static stiffness-damping regulation and control method is simple, driving voltage signal leakage can be restrained when the MEMS is used as a resonance driver, and meanwhile the MEMS static stiffness-damping regulation and control method can be compatible with MEMS device structural design.

The application relates to the field of air charging technology, in particular to an AC / DC air pump core and an air charging pump. The AC / DC air pump core comprises a shell, a first air feeding device and a second air feeding device, the shell is provided with an air suction channel, a first containing space, a second containing space and an air charging channel; the air suction channel, the first containing space and the air charging channel are sequentially communicated; the air suction channel, the second containing space and the air charging channel are sequentially communicated; the first air feeding device is arranged in the first containing space; the first air feeding device comprises a DC driving element and a first fan blade connected with the DC driving element; the second air feeding device is arranged in the second containing space; the second air feeding device comprises an AC driving element and a second fan blade connected with the AC driving element. The AC / DC air pump core adopts the common air suction channel and the common air charging channel, which is beneficial to reducing the volume, thereby achieving the purposes of saving the production cost and reducing the volume.

To provide a force measuring device of sufficient accuracy combined with an appropriate and simple configuration.SOLUTION: A force-measuring device based on the principles of electromagnetic force compensation, comprising an electronic circuit driven by a direct current, the electronic circuit comprising an inductor, in particular a coil, a control unit for controlling a compensation force by controlling a current through the inductor as a function of a force to be measured, and means for providing a measurement output indicative of the force to be measured, wherein the control of the current comprises a dynamic switching of two switch states associated with two conducting directions of the inductor (1L, 2L).SELECTED DRAWING: Figure 2

The invention particularly relates to an alternating-current driven perovskite light-emitting diode and a preparation method and application of the alternating-current driven perovskite light-emitting diode. The preparation method comprises the following steps: spin-coating a cleaned conductive glass substrate with an electron transport layer material, spin-coating an electron transport layer with a perovskite precursor solution, and carrying out annealing treatment to obtain a compact and uniform perovskite thin film; and spin-coating a hole transport layer material on the perovskite thin film, and then carrying out vacuum evaporation on an interface modification layer and a metal electrode on the hole transport layer to obtain the perovskite light-emitting diode device, and driving the device by using an alternating current driving mode. Compared with a traditional direct-current driving mode, the stability of the perovskite light-emitting diode device is remarkably improved through the alternating-current driving mode, the strategy has certain universality and effectiveness in the aspect of working stability of the perovskite light-emitting diode device, and commercial application of the perovskite light-emitting diode is facilitated.

The utility model belongs to the technical field of electronic circuit, specifically disclose a linear power module output's audio control type BUCK power amplifier power, including power amplifier transformer module, two -way audio control BUCK circuit and linear power module, power amplifier transformer module exports two independent DC drive power and two independent DC reference power to two -way audio control BUCK circuit, two -way audio control BUCK circuit exports two adjustable power amplifier voltage to linear power module, linear power module carries out low -pass filtering and active amplification processing to two adjustable power amplifier voltage, exports two purification power amplifier voltage to load. The utility model integrates the advantages that switching power supply is high in efficiency and linear power module output ripple is small and has less interference, and the compatibility contradiction between power amplifier power efficiency and output voltage quality is solved well, and the comprehensive performance is excellent. And the size of power amplifier power voltage is further improved the efficiency of power amplifier power with equivalent audio voltage signal proportionally.

The invention discloses a heavy-load train group operation control system hybrid energy storage management method and device, and the method comprises the steps: obtaining the speed and position of all heavy-load trains in a group, planning the speed and acceleration of each train, and calculating the future power demand of each train; according to the future power requirement of the train, online simulation is carried out through cloud digital twin, and a sliding mode surface parameter, a control law parameter and an event triggering threshold value are output; collecting a train bus voltage, and generating a total reference current required by future power by combining a given bus voltage and adopting a PI (Proportional Integral) controller; acquiring real-time states of the super capacitor and the lithium battery, and comparing the real-time states with an event triggering threshold value to judge whether to start a sliding mode controller or not; if the sliding mode controller is started, the total reference current is distributed to the lithium battery and the super capacitor, and a corresponding DC / DC driving control signal is generated. According to the method, the vehicle-mounted calculation and communication frequency can be reduced, and the flexibility and robustness of heavy-load train group energy management are improved.

The present invention discloses a bionic robot for monitoring the temperature of shallow soil at contaminated sites. The robot comprises a drilling mechanism, a steering mechanism, a control mechanism, and a peristaltic mechanism, which are sequentially arranged. The drilling mechanism comprises a spiral drill bit, a drilling mechanism housing, and a drill motor disposed within the drilling mechanism housing. The steering mechanism comprises a first steering connecting plate, a second steering connecting plate, a universal joint, and a steering mechanism housing. The control mechanism comprises a control mechanism housing, a control board disposed within the control mechanism housing, a DC drive board, and a wireless communication module. The peristaltic mechanism comprises a temperature and humidity sensor and a peristaltic mechanism housing. The bionic robot of the present invention has a simple structure and a small size, making it easy to deploy on site. By acquiring temperature data through wireless transmission, it enables real-time monitoring of soil temperature at different depths in the shallow layer of a contaminated site.

The purpose of the present invention is to provide a heat exchange system capable of reducing cost when replacing a board of a power conversion device.　This heat exchange system according to the present disclosure comprises: a water heat exchanger; a water circulation pump; a power conversion device that is electrically connected to the water circulation pump; a water use device; and a water pipe that connects each device. The power conversion device comprises: a main board having an AC voltage supply unit in which an AC voltage is inputted from an AC power supply, and when the water circulation pump is an AC drive water circulation pump, supplies the AC voltage to the AC drive water circulation pump, and a control unit that, when the water circulation pump is a DC drive water circulation pump, determines a DC voltage command value to be input to the DC drive water circulation pump; and a relay board that is a different board separated from the main board, and has a DC voltage conversion unit that converts the AC voltage into a DC voltage, a voltage adjustment unit that adjusts the voltage so that the value of the DC voltage matches the DC voltage command value, and a DC voltage supply unit that supplies the adjusted DC voltage to the DC drive water circulation pump.

According to the technical scheme, the straight wire drawing machine is characterized in that the straight wire drawing machine comprises a base, a containing frame is fixedly installed on the top face of the base, an installation plate is fixedly installed on the top face of the base, an installation hole is formed in one side of the installation plate, a bearing is fixedly installed in the installation hole, and a take-up rotating shaft is fixedly installed on an inner ring of the bearing; the adjusting assembly is arranged on one side of the mounting plate and used for adjusting tension, the moving plate is pushed to move through an air cylinder telescopic shaft, the tension wheel is driven to move through moving of the moving plate, the tension borne by the tantalum wire is changed through moving of the tension wheel, the tension borne by the wire drawing tantalum wire is accurately controlled, and the tantalum wire yield is improved; the controller body is an M-Driver controller, the M-Driver is an accurate digital motor digital driver, an air cylinder is accurately controlled through the controller body, control parameters of the controller body can be input by a user and output by a regulator to directly control and drag a direct-current driver of the take-up machine, and therefore the purpose of controlling the drawing tension of the fine-diameter tantalum wire is achieved.

The invention belongs to the field of mowing robots, and relates to a mowing height-controllable anti-falling mowing machine, which comprises walking mechanisms symmetrically mounted on two sides of a frame through a frame, and each walking mechanism comprises two Mecanum wheels with direct-current driving motors; the photovoltaic mechanism comprises a top glass plate, a photovoltaic plate supporting column, a flexible photovoltaic plate, a photovoltaic guide rail and a micro guide rail motor; the lifting cutting mechanism is mounted in the rack and extends to the lower part of the rack; comprising a circular chassis, a cutting blade mounted below the circular chassis through a shaft sleeve II with a bearing at the bottom, a wind blocking baffle plate and an arc-shaped baffle plate which are mounted on the lower surface of the circular chassis through a baffle plate fork plate, and a splash-proof baffle plate mounted on the lower surface of the circular chassis through an air duct plate, the exhaust fan is mounted on the lower surface of the circular chassis; the lifting assembly is used for driving the cutting blade to lift; and the driving assembly is used for driving the cutting blade to rotate. According to the invention, grass lodging can be prevented, and the mowing height can be accurately controlled.

The present invention provides a comparative experimental device for an isolated DC-DC drive circuit, including an independently arranged wireless transmitter, a wireless receiver, a DC-DC drive circuit module, a charging trolley test end, and a host computer end. During the experiment, the DC-DC drive circuit module is arranged in the wireless transmitter, and the wireless transmitter, the wireless receiver, and the charging trolley test end all send data to the host computer end. The present invention updates the isolated DC-DC experimental training equipment from discrete component assembly to detachable modules, reducing the time for trainees to build circuits and reducing the potential safety hazards existing in circuit building.

Provided is a swivel actuator including: a cylindrical housing with a hollow cylindrical portion protruding in a center thereof; a BLDC drive motor having a rotor rotatably installed around the hollow cylindrical portion; a cylindrical first worm gear integrally formed on an outer circumference of the rotor; first and second gear trains coupled to the first worm gear to reduce a rotation speed of the drive motor to generate a torque-increased rotational output; a rotary table rotatably coupled to the hollow cylindrical portion and a ring gear integrally formed inside a side surface portion; and first and second pinion gear units having lower end portions coupled to the other side of the first and second gear trains, respectively, and having an upper end portion coupled to the ring gear to transfer an torque-increased rotation output to the rotary table.

The invention discloses a high-current commutation automatic following test circuit which comprises an input interface, an output interface, a polarity detection module, a commutation execution module and a power supply module. The input interface is used for accessing a to-be-tested power supply, and the output interface is connected with an electronic load. The polarity detection module is connected to the input interface and is used for detecting the voltage polarity between the first input end and the second input end in real time and outputting a control signal; the reversing execution module is controlled by the polarity detection module and is switched between the first conduction path and the second conduction path; the power supply module converts an original input voltage into a preset DC driving voltage. According to the scheme, through linkage of the polarity detection module and the commutation execution module, automatic identification and mechanical commutation of the input polarity are achieved, and it is ensured that the direction of the current output to the load is constant. The mechanical contact is used for conduction, the conduction voltage drop and the heating loss under a large current test are reduced, and the power supply module widens the voltage application range of the source to be tested.

The utility model relates to the technical field of household appliances, in particular to a clamping and swinging device of a blowing device. The clamping and swinging device of the air blowing device comprises a supporting rod, a base and a fixing seat, the base comprises a second cover plate, a first cover plate and a direct current driving assembly, the first cover plate is provided with a sliding assembly, the direct current driving assembly comprises a torsion amplifier, and the supporting rod is connected with the first cover plate. The direct-current driving assembly drives the first cover plate to swing relative to the second cover plate through the sliding assembly, so that the supporting rod drives the blowing device to swing. According to the utility model, the torsion amplifier is additionally arranged in the direct-current driving assembly, so that the low-torsion driver can generate enough torsion to easily drive the bracket to rotate, and the problem that the traditional swinging bracket depends on a high-torsion motor is solved. Besides, the sliding assembly is arranged on the first cover plate, friction between the first cover plate and the second cover plate is reduced, smooth swinging is achieved when the direct-current driving assembly drives the first cover plate, and the requirement for high torque of the motor is lowered.

The utility model discloses a follow-up self-adaptive plastic forming machine which comprises a base, a support is fixedly installed on the rear side of the base, a speed reducer is fixedly installed at the upper end of the support, a direct current motor is fixedly installed on the right side of the speed reducer, and an extruder is fixedly installed on the front side of the speed reducer. An extruder is fixedly mounted at the upper end of the base, a storage bin is fixedly mounted at the upper end of the extruder, a rack is arranged on the outer side of the extruder, a PLC is fixedly mounted at the upper end of the base, and a direct current driver is fixedly mounted at the upper end of the base. According to the follow-up type self-adaptive plastic forming machine, the mold core, the piston rod and the hydraulic cylinder are used in cooperation, when the hydraulic cylinder drives the piston rod and the mold core to vertically adjust the wall thickness of the mold core and the discharging opening, a rod sleeve and a supporting plate on the piston rod move vertically along with the piston rod, and therefore a pull wire is driven to move; the displacement sensor can monitor the movement distance of the piston rod, and displacement changes of the piston rod adjusting mold core are conveniently and accurately collected.

Vehicle-mounted peach tree pesticide spraying equipment belongs to the field of agricultural machinery and comprises an electric vehicle with a vehicle box and a driving car, an arc sliding device and a pesticide liquid barrel are arranged on the inner bottom face of the vehicle box of the electric vehicle, a pesticide spraying machine is arranged on the arc sliding device and comprises a vertical lifting part, and a rotating arm is rotationally connected to the side face of the upper end of the vertical lifting part; an extension arm is arranged in the rotating arm, the arm end of the extension arm is rotationally connected with a variable-angle spraying plate, a plurality of nozzles and a liquid medicine barrel are arranged on one side, facing the peach trees, of the rotating arm, a direct-current driving water pump is arranged in the liquid medicine barrel, and the direct-current driving water pump is connected to the nozzles through pipelines. Side effects brought by pesticide spraying operation to operators are reduced, the operation efficiency is improved, timely pest control can be achieved, and the yield or quality of peach trees is ensured.

The present application relates to the field of internal combustion engine vehicle control, and particularly relates to a method for realizing traction motor current complement of low-speed control of double-heading DC transmission locomotive, which comprises the following steps: S10. determining master locomotive and controlled locomotive in two internal combustion engine vehicles adopting double-heading control, and setting the two internal combustion engine vehicles to low-speed control; S20. master locomotive completing traction motor current regulation of master locomotive based on at least motor current given reference value and locomotive speed given reference value; S30. master locomotive determining controlled locomotive motor current given reference value based on at least motor current given reference value and sending controlled locomotive motor current given reference value to controlled locomotive; S40. controlled locomotive completing traction motor current regulation of controlled locomotive based on at least controlled locomotive motor current given reference value to implement power compensation to master locomotive. The present application can satisfy low-speed constant control under double-heading condition of large-tonnage loading and traction background.

The invention discloses a multi-redundancy control and safety protection system and method for vortex magnetic braking of a drilling platform. The system is characterized in that a first controller and a second controller of a control module operate in a main-standby redundancy mode; a first direct-current driving device and a second direct-current driving device of the driving module are in communication connection with the control module and are controlled by the control module; the first direct-current driving device and the second direct-current driving device are respectively connected with the vortex magnetic brake coil for driving; the power supply standby module comprises a standby emergency busbar used for providing power for a vortex magnetic brake, a standby direct-current power supply used for providing power for a vortex magnetic brake coil and a standby control power supply used for providing power for the control module. The first controller and the second controller are further used for conducting fault diagnosis and early warning and alarm processing on the vortex magnetic brake according to the real-time electrical data. And the control state of the vortex magnetic brake is determined according to the state of the dry contact signal, and an output control signal is determined according to a preset parabola control curve and preset protection logic.

The utility model discloses a compressor stepless air flow regulation system, which relates to the compressor field, and comprises a cabinet module, a central control module and an explosion-proof area, the cabinet module comprises an electronic control unit ECU, a setting module, a DC driving power supply and an interface adapter IA, and the explosion-proof area comprises a stepless air flow regulation execution mechanism and a hydraulic energy HPU. The central control module is electrically connected with the ECU based on a 4-20 mA load control signal, the ECU is electrically connected with the interface adapter IA through a first TDC signal line, the interface adapter IA is electrically connected with the stepless gas flow regulation executing mechanism through a second TDC signal line, and the ECU is electrically connected with the stepless gas flow regulation executing mechanism through BUS communication. According to the stepless air flow adjusting system of the compressor, the power consumption during working of the compressor can be effectively reduced, the overall working energy consumption can be reduced, meanwhile, replacement and maintenance of spare parts of the compressor can be reduced, the service life of the compressor can be effectively prolonged, and the working time of the compressor can be effectively prolonged.

The application discloses a kind of circuit device and method for ultra-wideband optical signal detection and amplification, belong to photoelectric signal detection and processing technical field, including optical detection conversion unit, for detecting optical signal and the optical signal detected is converted into electrical signal;DC high-frequency separation unit, for separating electrical signal into DC signal and high-frequency signal;Current-voltage conversion and DC voltage amplification unit, for converting DC signal into DC voltage signal and amplifying the DC voltage signal converted;DC drive unit;High-frequency amplification unit, for amplifying high-frequency signal;DC high-frequency combination unit, for the DC voltage signal amplified after current and the amplified high-frequency signal are synthesized and output;High-frequency amplification unit is the radio frequency amplifier or microwave amplifier prepared using gallium arsenide process.It can detect and amplify from DC to 20GHz optical modulation signal.A kind of method for ultra-wideband optical signal detection and amplification is also disclosed.

The application discloses a heavy-load train group operation control system hybrid energy storage management method and device, which comprises the following steps: acquiring the speed and position of all heavy-load trains in the group, planning the speed and acceleration of each train, and then calculating the future power demand of each train; according to the future power demand of the train, the cloud digital twin is simulated online to output the sliding mode surface parameter, the control law parameter and the event trigger threshold; the train bus voltage is collected, the given bus voltage is combined, and the PI controller is used to generate the total reference current of the future power demand; the real-time state of the super capacitor and the lithium battery is acquired, and the event trigger threshold is compared to determine whether to start the sliding mode controller; if the sliding mode controller is started, the total reference current is distributed to the lithium battery and the super capacitor to generate corresponding DC / DC drive control signals. The application can reduce the frequency of on-board calculation and communication, and improve the flexibility and robustness of energy management of the heavy-load train group.