25 results about "Dc drive" patented technology

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 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.

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 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 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 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 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.

The utility model relates to the technical field of reduction gearbox discloses a main shaft zero angle calibration electric valve reduction gearbox, including the base, the top right side fixed connection of base has the vertical support board, the front side left end of vertical support board is installed with X -axis limit rod in the edge department, the front side middle part fixed connection of vertical support board has the test reduction gearbox assembly, the front side left end fixed connection of test reduction gearbox assembly has the DC drive motor. In the utility model, the device is placed on the workbench, and the reduction gearbox to be calibrated is placed on the base according to the direction of power output shaft, and the position of adjustable limit rod is matched to correct the device, so that the demand of high-precision calibration of the main shaft angle of the micro gear box can be met, the structure of the micro gear box is small in size and compact in internal space, and the accurate measurement of the main shaft angle is facilitated, and the use effect of the device is improved.

The utility model relates to the technical field of wireless charging, and discloses a conversion voltage stabilizing circuit and electronic equipment, the conversion voltage stabilizing circuit comprises a voltage stabilizing unit, a charging unit, a control unit and a comparison unit, the first power supply end of the voltage stabilizing unit is connected with the voltage stabilizing unit and the charging unit, and the comparison unit is used for detecting the charging voltage of an energy storage device; when the control unit detects that the direct-current driving voltage is lower than a preset power failure protection threshold value, the control unit controls the voltage stabilizing unit to store energy through the voltage of the wireless charging coil, so that the direct-current driving voltage is increased, and the control unit is prevented from entering a power failure state.

A lighting device includes a driver, a first light string, a second light string, a constant current controller and a pulse width modulation controller. The driver is configured to provide a DC driving current to a shunt node. The first light string is electrically coupled between the shunt node and a ground terminal, and the first light string is driven by a first pulsating direct current. The second light string and the constant current controller are electrically coupled in series between the shunt node and the ground terminal. The pulse width modulation controller is configured to provide a pulse signal to the constant current controller, and the constant current controller controls a pulse frequency of a second pulsating direct current supplied for the second light string according to the pulse signal.

A muti-motor integrated power circuit includes: a power input conversion circuit configured to convert a power input signal from a standby power source to a busbar power signal; a power factor correction circuit configured to convert and superpose an AC input signal of the AC power source with the busbar power signal; a first isolation circuit configured to convert the busbar power signal to an isolation output signal; a first switch sub-circuit configured to convert the busbar power signal to a first AC signal; an isolation transformer configured to convert the first AC signal to at least two second AC signals; a first power conversion circuit or an isolation transformer configured to convert the isolation output signal or the second AC signal to a DC drive signal; and a second power conversion circuit configured to convert the isolation output signal or the second AC signal to an AC drive signal.

The application relates to a single-power-source isolated driving DCDC converter and a new energy vehicle, wherein the converter comprises a direct-current driving circuit, a sampling circuit, a master control chip, a single-power-source transformer isolated driving circuit and a rectification driving circuit, the sampling circuit is used for collecting circuit parameters in a direct-current voltage output process, the master control chip is used for respectively sending a first driving signal to the single-power-source transformer isolated driving circuit and sending a second driving signal to the rectification driving circuit according to the circuit parameters, the single-power-source transformer isolated driving circuit generates an inverter driving signal by using the first driving signal, and the rectification driving circuit generates a rectification driving signal by using the second driving signal; and a direct-current output circuit is used for inverting a direct-current power supply into an alternating-current power supply by using the inverter driving signal, rectifying the alternating-current power supply by using the rectification driving signal, and outputting a stable target direct-current voltage. The single-power-source transformer isolated driving circuit is used for isolated driving, and the complexity of the isolated driving is reduced.

This invention relates to a DC drive protection circuit and its design method for a mid-infrared laser, belonging to the field of power supply drive protection technology. The core of this invention lies in achieving dual hardware protection for both laser voltage and current through three main modules. Key technical points include: a voltage protection module composed of comparator U1, operational amplifier U3, etc., integrating a voltage differential, hysteresis comparator, and adjustable potentiometer to monitor the voltage difference across the laser in real time and automatically cut off the power supply in case of overvoltage; a current protection module composed of comparator U5, etc., which limits the amplitude of the microcontroller's D / A signal through a hysteresis comparator and potentiometer to precisely control the current range; and a voltage-controlled constant current source module composed of operational amplifier U6, etc., generating a constant current to drive the laser. The voltage protection allows for flexible switching of the power supply based on the actual voltage difference, avoiding frequent false triggering; the current protection threshold is adjustable via a potentiometer to adapt to different laser specifications; and the constant current source ensures stable output. This improves the reliability and lifespan of the mid-infrared laser.

Control circuit for a switching half-bridge, this switching half-bridge comprising two controllable solid-state switches arranged on either side of a midpoint, each switch comprising a control input, one switch being connected to a voltage source, the other to a reference potential. The control circuit, being capable of driving the switches of the half-bridge, is connected to a DC driving voltage source and comprises: - A trigger circuit, comprising two inputs and one output, the second input being connected to the midpoint of the switching half-bridge, and comprising a capacitor connected between the second input and the output; - A first and a second switch driver, each comprising two inputs and one output, the output of each driver being connected to the control input of the first and second switches of the half-bridge respectively.The inputs of the first driver are connected to the output of the priming circuit and the midpoint of the switching half-bridge respectively, and the inputs of the second driver are connected to the pilot voltage source and a reference potential respectively. The control circuit is characterized in that it comprises a switching circuit capable of disconnecting the first input of the priming circuit from the pilot voltage source when the second switch of the switching half-bridge is driven in the open position.

The invention relates to the technical field of axial flow water pumps, in particular to a brushless direct-current-driven low-noise axial flow water pump which comprises a pump pipe, a power device is fixedly connected to one side of the pump pipe, a rotating shaft is connected to the power device, one end of the rotating shaft extends into the pump pipe, a fixed pipe is fixedly connected into the pump pipe, and the fixed pipe and the rotating shaft are coaxially arranged. The driving assembly with the rotating plate is arranged in the pump pipe, after the flow water pump completes conveying of fluid, the power device starts to drive the impeller to rotate reversely, at the moment, the impeller drains water in the pump pipe back into the water pool, and after the water is drained, the driving assembly controls the rotating plate to rotate to separate the interior of the pump pipe from the water pool; at the moment, the interior of the pump pipe is not immersed in water any more, the situation that various algae grow on the impeller or water scales are condensed on the impeller, so that the load of the motor is increased, and abrasion of the impeller is aggravated is avoided, and therefore the service life of the flow water pump is prolonged, noise is lowered, and follow-up maintenance cost is lowered.

The invention discloses a turnout control system and method capable of switching alternating current and direct current. The system comprises a turnout control module, a data storage chip and a safety communication board, the turnout control module comprises a direct-current turnout control module used for controlling a direct-current switch machine and an alternating-current turnout control module used for controlling an alternating-current switch machine, and the direct-current turnout control module is composed of a logic control mother board and a direct-current driving pinch plate. The alternating current turnout control module is composed of a logic control mother board and an alternating current driving pinch plate. The logic control mother board is used for communicating with the safety communication board, initializing equipment, loading a software mirror image, processing a logic command, judging a device state, processing a driver and acquiring a task; the direct-current driving pinch plate and the alternating-current driving pinch plate are used for outputting driving electricity to the switch machine in a driving mode and obtaining indication information of the switch machine in an acquisition mode. The method is used for solving the problem of high hardware replacement cost during station yard transformation.

A force measuring device based on the principle of electromagnetic force-compensation is disclosed. The device includes an electronic circuit driven by direct current, which includes an inductor. A control unit of the device controls the current flowing through the inductor and thereby also the compensation force, where the controlling is responsive to the force to be measured. The device also includes a means for providing a measurement output indicative of the force to be measured. Controlling the current includes dynamic switching between two switch states associated with the two conduction directions of the inductor.