30results about How to "Stable current output" patented technology

The driving and dimming control device for illuminator includes an AC power input end connecting to a phase dimmer, a DC power output end for connecting to a lighting load, a rectifier connecting to the AC power input end, a pulse width modulator connecting to a transformer, a voltage/current detector, a photo-coupler connecting between the voltage/current detector and pulse width modulator, and a low-voltage-input locking circuit connecting between an output terminal of the phase dimmer and pulse width modulator. The low-voltage-input locking circuit includes a locking switch and a reset switch. The signals input to the pulse width modulator are locked by the locking switch to prohibit the pulse width modulator from hiccupping. Thus the DC output power can be stabilized.

The invention discloses a current pulse circuit embedded with a nerve stimulator. The current pulse circuit comprises a microprocessor, a first inductor, a first diode, a second resistor, a fifth resistor, a filter capacitor, a boost-buck DC-DC (direct-current-direct-current) chip, a first circuit output terminal and a second circuit output terminal, wherein the first circuit output terminal is grounded through the second resistor and the fifth resistor; the boost-buck DC-DC chip comprises an error amplifier, a PWM (pulse-width modulation) comparator, a switching tube, an SR trigger and an oscillator; the common terminal of the second resistor and the fifth resistor is connected into the first inverting input terminal of the error amplifier; the non-inverting input and output terminals of the error amplifier are respectively connected with reference voltage and the inverting input terminal of the PWM comparator; the oscillation output of the oscillator is connected with the non-inverting input terminal of the PWM comparator; the oscillator outputs a switching signal to the terminal S of the SR trigger; the output terminal of the PWM comparator is connected with the terminal R of the SR trigger; and the output terminal Q of the SR trigger is connected with the control terminal of the switching tube.

The invention discloses a strong anti-offset wireless power transmission system based on mode switching, belongs to the technical field of wireless power transmission, and particularly relates to the strong anti-offset wireless power transmission system based on mode switching. According to the invention, the problems of a large size, high cost and low efficiency of a post-stage closed-loop control DC/DC converter caused by a large offset of a primary and secondary side coupling mechanism of an existing wireless power transmission system are solved. A secondary side controller outputs a rectification switching instruction to a control signal input end of a rectification switching circuit according to an upper limit and a lower limit of an output voltage of the rectification switching circuit and an input voltage of a DC/DC converter; the secondary side controller also transmits the inversion switching instruction to the secondary side wireless communication module through the secondary side wireless communication module; and a primary side wireless communication module receives the inversion switching instruction and transmits the inversion switching instruction to a primary side controller, and the primary side controller receives the inversion switching instruction and sends a state switching control signal to the inversion switching circuit. The system is suitable for the technical field of wireless power transmission.

The invention belongs to the technical field of wiring terminals, and particularly relates to a wiring terminal which comprises a shell, an output rod, a lantern ring, a mounting pipe and a clamping device. The mounting pipe is arranged in a circular through hole in the center of the top of the shell; an annular sliding plate fixedly arranged at the outer edge of the mounting pipe is in sliding connection with an annular sliding groove in the inner wall of the circular through hole. A rectangular through hole is formed in the mounting pipe; a rectangular sliding groove is formed in the inner wall of the mounting pipe; the bottom of a rectangular sliding block is fixedly connected with the bottom of the rectangular sliding groove through a spring. A pin shaft is fixedly arranged on the rectangular sliding block; two output rods which are mutually symmetrical and crossed are movably arranged on the pin shaft through torsional springs; the two output rods are of semi-cylindrical structures respectively, and the curved surfaces of the two output rods deviate from each other. The top end of each output rod extends out of the top of the shell; and a handle is fixedly arranged at the edgeof the output rod and located above the lantern ring. Connection between the cable and the output rods is quite firm, current output is more stable, and meanwhile a cable insulating sleeve can be cut.

The invention discloses a fuselage conductive structure of an unmanned aerial vehicle and a manufacturing method of fuselage frames, the fuselage conductive structure comprises a battery pack, a fuselage assembly and blade motor power supply wires; the battery pack includes a lithium battery pack body and a power supply circuit board, the fuselage assembly includes two fuselage frames and two fuselage cross beams, the fuselage frames and the fuselage cross beams are respectively prepared from a thickening-type double-sided copper clad plate which is double-sided printed with conductive layers, the fuselage frames are respectively arranged at trisection cross sections in a fuselage cabin, PI shaped supporting structures are formed on the fuselage frames, two ends of the fuselage cross beams are respectively fixed on the PI shaped supporting structures of the two fuselage frames, the two fuselage frames are also provided with banana jacks, and a plurality of groups of blade motor power supply wires are in plug connection with the power supply banana jacks of the fuselage frames. The fuselage conductive structure has the advantages of simple structure, light weight and compact structure, and solves the problems of a complex fuselage mechanical structure and many electrical circuits of a traditional multi-rotor unmanned aerial vehicle, the weight of the fuselage structure is reduced, meanwhile a stable large current output is realized, and time of endurance is improved.

The invention discloses a flexible moisture power generation device and application thereof. The invention relates to a microbial film which is prepared by drying electroactive bacteria, the electroactive bacteria comprise escherichia coli. The flexible moisture power generation device comprises a microbial film, a bottom electrode and a top electrode, one side surface of the microbial film is in fit connection with the top electrode, and the other side surface of the microbial film is in fit connection with the bottom electrode. After escherichia coli forms a film, the surface is smooth, a large number of hydrophilic groups are contained in the film, the self-healing property is high, and the film can be used as an ideal moisture absorption material. The Escherichia coli microbial film can serve as a core component of a moisture power generation device, and compared with an existing core component of the moisture power generation device, the Escherichia coli microbial film is simpler in preparation process, lower in cost and higher in power generation efficiency.

A switch power for driving laser light emitting diode, including: the adjusting operating current multi-circle potentiometer and the operating current amplifier that connect with each other, the setting most current multi-circle potentiometer and the setting current amplifier that connect with each other, the operating current amplifier and the setting current amplifier connect with the current value comparison selecting gate, the output of the current value comparison selecting gate connects with the outputting current controller, the outputting current controller connects with the laser by the big current power module. The invention is: high stability power, settable most operating current, forcible zero startup function, high power factor and high power efficiency.

The invention discloses a cutter for a lawn ventilator. The main points of the cutter provided by the invention are as follows: the cutter comprises a rotating shaft, a hitching leg support, mountingdisks, supporting disks, cutter shafts and blade assemblies; the left end of a short axis of the rotating shaft is rotatably arranged in the hitching leg support through a corresponding bearing; two mounting disks are respectively and fixedly arranged at the left and right ends of a square-tube long axis of the rotating shaft; the supporting disks are arranged on the square-tube long axis of the rotating shaft in a uniformly-spaced manner from left to right; the cutter shafts are arranged on the mounting disks and the supporting disks; each blade assembly comprises a blade and a connecting sleeve; each blade is fixedly embedded on a connecting sleeve; blades are rotatably arranged on the cutter shafts through connecting sleeves; and the blades are spirally arranged in the axial direction of the square-tube long axis of the rotating shaft.

The invention discloses an environment-friendly geopolymer battery, which comprises a first metal patch, a positive electrode layer, an electrolyte layer, a negative electrode layer and a second metal patch from top to bottom; The raw materials include 40 to 50 parts of geopolymer powder, 20 to 30 parts of potassium base activator, 15 to 25 parts of manganese dioxide powder and 2 to 3 parts of graphite powder; the raw materials of the electrolyte layer include 4 to 5 parts of earth polymer powder and 4-5 parts of potassium-based base activator; the raw materials of the negative electrode layer include 40-50 parts of geopolymer powder, 20-30 parts of potassium-based base activator and 10-20 parts of zinc powder. The environmentally friendly geopolymer battery proposed in the technical solution has a stable current output, can effectively improve the metal utilization rate of the battery and reduce its recycling cost, and has little impact on the environment. Furthermore, a method for preparing the above-mentioned environment-friendly geopolymer battery is proposed, which has a simple process and strong operability, and is beneficial to ensure the stable current output of the geopolymer battery.

The invention provides a five-level multi-bridge-arm switching power amplifier circuit which is composed of an active midpoint clamping power supply, a main bridge arm, a five-phase load and a load bridge arm, wherein the active midpoint clamping power supply, the main bridge arm, the five-phase load and the load bridge arm are electrically connected together in sequence. Through the design of thecircuit topology, the circuit can provide five levels, two of the five levels are forward half-voltage conduction and reverse half-voltage conduction, so that output waveform ripples are smaller whenthe power amplifier tracks more stable signals, and the power amplifier can be used in a magnetic suspension bearing.

The invention discloses a lawn ventilator which comprises an enclosure, a motor, a soil loosening tool and a walking mechanism. The walking mechanism is arranged on the enclosure; a hand rail is arranged on the enclosure; an operation switch is arranged on the upper portion of the hand rail; the technical scheme includes that the soil loosening tool includes a rotating shaft rotatably arranged onthe enclosure and blades movably arranged on the rotating shaft. The motor shaft of the motor is in direct transmission connection with the rotating shaft of the soil loosening tool to drive the rotating shaft of the soil loosening tool to rotate to enable the blades on the rotating shaft to be swung out under the action of centrifugal force to conduct lawn loosening and aeration.

The invention discloses a portable solar power bank with light tracing, including a battery backplane, a solar panel is arranged on the battery bottom plate, a solar panel includes a support rotary panel, a support rotary plate is connected with a battery panel assembly through an articulated shaft, a corn device is arranged in the middle of the contact surface of the support rotating plate and the battery bottom plate, the corner device includes a micro drive motor mounted in a battery chassis, the motor shaft of the micro drive motor is connected with a speed reducer, the speed reducer comprises a double-sided rack ring fixedly mounted on the bottom of the supporting rotary plate, the center of the double-sided rack ring is provided with a sun gear connected with the output shaft of themicro drive motor, Between that sun gear and the double-sided rack re, a clutch wheel device is arranged between the double-sided rack ring and the articulated shaft, and a light tracing device is arranged on the top of the battery panel assembly, so that the structure of the solar energy power bank is simple and portable, the stable power output can be provided, and the charging efficiency of thesolar energy power bank can be improved.