264results about How to "Increase output current" patented technology

The invention discloses an intelligent integrated power supply device for Internet of Things. The intelligent integrated power supply device comprises a front public power supply module, a single chip microcomputer core control module, a DC voltage grade conversion module and a communication interface module, wherein the front public power supply module comprises an AC/DC front base voltage stabilizing circuit and an auxiliary power supply circuit; the single chip microcomputer core control module completes collecting and monitoring of voltage and current of various paths of output modules, and achieves a programmable presetting function on output voltage and over-voltage, over-current and over-temperature protection functions of various output loops of a complete machine through digital potentiometers; the DC voltage grade conversion module comprises four paths of identical modules; each module comprises a DC/DC converter circuit, a current/voltage sampling circuit and the digital potentiometer; and the communication interface module is connected with serial communication pins of a single chip microcomputer, completes the function of connecting different forms of actual transmission interfaces and forms connection with a network from an upper node to a monitoring center.

The invention provides a rotary-type compound nanometer power generator. The rotary-type compound nanometer power generator comprises a friction nanometer power generation assembly and a magnetic-electric sensing power generation assembly, wherein the friction nanometer power generation assembly comprises a rotor and a stator which are provided with a command rotation shaft, a friction layer is arranged on the lower surface of the rotor and is formed by outwards and radially arranging a plurality of friction units taking the rotation shaft as a circle center, an electrode layer of the stator comprises a first electrode and a second electrode which are formed by outwards and radially arranging a plurality of first electrode units and a plurality of second electrode units at intervals in the same plane from the rotation shaft, electron gain-loss capability difference exists between the friction units and the upper surface material of the stator, a magnet part and a coil part of the magnetic-electric sensing power generation assembly are separately arranged on the rotor and the stator, and under the effect of an external force, induction potential difference is generated between the two electrodes, and meanwhile, induction current is generated in the coil part. The power generator provided by the invention can acquire current output with milliamperes and can be used for directly supplying power to a small-sized power utilization device.

The invention discloses nitrogen-doped graphdiyne serving as an oxygen reduction electric catalyst and a composite material of the nitrogen-doped graphdiyne. The invention further relates to a preparation method of the nitrogen-doped graphdiyne. The nitrogen-doped graphdiyne material is obtained by heating graphdiyne power in mixed gas with a nitrogen source under certain temperature, keeping the temperature for certain time, and then naturally cooling the material. The catalyst material is high in activity; compared with a more commercial Pt/C catalyst, the catalyst material has the advantages of high output current, correction of reduction potential, high methanol interference resistance, high stability and the like.

The invention provides an LED (light emitting diode) dimming control circuit which is used for driving LEDs. The LED dimming control circuit comprises an inductor, a transistor, a dimming control signal, a feedback signal, a switching control circuit, an error amplifier and an inverting amplifier. The switching control circuit is controlled by the dimming control signal and the feedback signal; the transistor is controlled by the switching control circuit; and the output end and the non-inverting input end of the error amplifier form a negative feedback path through the inverting amplifier.

The invention belongs to the technical field of high-power pulses, and particularly discloses a high-power pulse generator, a high-power pulse power supply and a high-power pulse generation method. The pulse generator comprises a main body composed of multiple stages of pulse modules connected stage by stage; and each pulse module generate an output waveform in response to a driving signal. Each pulse module comprises an energy storage capacitor with a first end and a second end, a plurality of equipotential solid-state switches, first isolation devices and second isolation devices, wherein each solid-state switch comprises a driving end, a first power end and a second power end, and the second power end is connected with the second end of the energy storage capacitor; the first isolationdevices are connected between the first end of the energy storage capacitor and the first power ends of the solid-state switches in series; and the second isolation devices are connected between the second end of the energy storage capacitor of the pulse module and the second power ends of the solid-state switches of the adjacent stage of the pulse module in series. The pulse generator has the beneficial effects that a high-power pulse output with a high voltage, a high current, a fast edge and a wide pulse can be generated.

Disclosed in the invention is an energy-harvesting-circuit-based piezoelectric-electromagnetic composite energy harvesting device. The invention relates to a piezoelectric-electromagnetic composite energy harvesting device capable of improving an output power, which belongs to the technical field of the new energy and power generation. The piezoelectric-electromagnetic composite energy harvesting device comprises a piezoelectric-electromagnetic composite energy harvesting device body and an energy collection circuit. The piezoelectric-electromagnetic composite energy harvesting device body consists of a housing, a coil, an upper permanent magnet, a piezoelectric ceramic material, a foundation beam, a tapered permanent magnet, a lower permanent magnet, an upper electrode, a piezoelectric plate, a lower electrode, a left piezoelectric plate upper electrode lead, a right piezoelectric plate upper electrode lead. The energy collection circuit includes an electromagnetic energy harvesting device energy collection circuit, a piezoelectric energy harvesting device energy collection circuit, and a charging circuit for realizing composite charging and preventing current returning. According to the invention, conversion from an alternating current to a direct current is realized; the output power supply is improved for a load. The energy harvesting device has advantages of green and pollution-free effects, high energy density, shortened charging time, high reliability, high environment adaptability, convenient operation control, and low maintenance cost and the like.

The invention discloses a method for charging a battery of an electric vehicle. The method comprises the steps that when the electric vehicle conducts energy feedback, the curve of the SOC of the battery and the maximum allowable charging current of the battery is inquired by estimating the SOC of the battery, and the maximum allowable charging current of the battery is obtained; then, the braking torque of the electric vehicle is reduced with a current control method, so that the charging current existing when energy feedback is conducted is not larger than the maximum allowable charging current of the battery, and the charging safety of the battery is guaranteed. The safety of the battery is guaranteed, the output current of a motor is increased to the greatest extent at the same time, so that the output current is approximate to the maximum allowable charging current, and therefore the charging efficiency is improved.

The invention relates to a charging circuit, a terminal and a charging method, belonging to the technical field of electronic circuits. The charging circuit comprises a control circuit and a step-downcircuit connected with the control circuit. A control circuit configured to acquire a feedback signal indicative of a generation frequency of the control signal, generate a control signal based on the feedback signal, and transmit the control signal to the step-down circuit; The step-down circuit is configured to obtain an input voltage and a control signal, perform step-down processing on the input voltage according to the control signal, output the obtained output voltage to the battery, the output current corresponding to the output voltage is larger than the input current corresponding tothe input voltage, and the output voltage is used for determining the generation frequency. The present disclosure can increase the output current such that the input current is small and the outputcurrent is large, so that the charging efficiency of the battery can be improved by a large output current, and the charging line can be made smaller when the input current is small, thereby reducingthe cost of the charging line.

The invention relates to a method for improving the nonuniformity of brightness of an OLED (organic light-emitting diode) display panel. The method comprising the steps of processing collected image data to be displayed in RGB (red green blue) 565 form and separating the levels values of red, green and black of each row of pixel points; obtaining an average value of the levels of the three colors of all the pixel points of each row, and taking the average value as a reference value of current consumed by the three colors of the entire row; comparing the reference value with the levels value of the three colors of each pixel point in the row, and if deviation exists, adding or subtracting a weighting coefficient of the corresponding levels until the comparison with all the points is completed; obtaining corrected image data based on the weighting values; outputting the corrected image data to a driving circuit; and outputting the image data. By adopting the method disclosed by the utility model, the three primary colors of all the points of the displayed image can be treated, and the levels values of red, green and black can be regulated to strengthen the output current of low-brightness pixel points or to weaken the output current of high-brightness pixel points, thereby making up the problem that the brightness of pixel points of an OLED liquid crystal screen is nonuniform due to the crossed interference of current with partial pressure.

The invention provides a self-driven switching type frictional nanometer generator. The generator comprises a friction generating unit and a voltage driven switch, wherein the friction generating unit comprises at least one pair of corresponding frictional layers used for generating opposite triboelectric charges through physical contact and electrodes which are mutually insulated and make contact with the two frictional layers; one electrode of the friction generating unit is connected with the voltage driven switch to serve as an output end of the frictional nanometer generator, and the other electrode of the friction generating unit serves as the other output end of the frictional nanometer generator. Closing and opening of the voltage driven switch are driven by the friction generating unit, electrical output characteristics of the frictional nanometer generator can be regulated and controlled, and the application range of the frictional nanometer generator is extended.

A driver circuit includes a combined current and voltage control circuit for driving a light emitting diode (LED) load. The driver circuit includes an isolation transformer having primary, secondary, and auxiliary windings. A primary side circuit is coupled to the primary winding and includes a power factor controller and a switch. The power factor controller controls an output current to the LED load by controlling an operational state of the switch. A secondary side circuit is coupled to the secondary winding. The secondary side circuit includes a proportional and integration (PI) control portion which outputs a control signal. A combined voltage and current control circuit is coupled to the auxiliary winding and includes an optocoupler coupled to the power factor controller and to the PI control section. The combined voltage and current control circuit transmits a control signal from the PI control section to the power factor controller.

The present invention discloses a piezoelectric-electromagnetic hybrid MEMS vibration energy collector and a preparation method thereof. A movable permanent magnet is used as a pick-up structure. Under the effect of a vibration environment, the movable permanent magnet moves in a cavity, thus the magnetic flux in a spiral inductance coil is changed, induction current is generated in a closed loop formed by the spiral inductance coil and an external load, and the conversion of vibrational energy into electrical energy through an electromagnetic induction mode is realized. In addition, when the movable permanent magnet moves in the cavity, the generated pressure or impact causes the bending deformation of a first square film or a second square film, the deformation of a piezoelectric layer is caused to generate piezoelectric voltage, the conversion of the vibrational energy into the electrical energy through a piezoelectric effect is realized, and the piezoelectric electrode of the piezoelectric layer is connected to supply power to the load. According to the piezoelectric-electromagnetic hybrid MEMS vibration energy collector and the preparation method, the modes of electromagnetic induction and piezoelectric effect are combined to convert the vibrational energy into the electrical energy, and the electromagnetic induction and the piezoelectric effect are superimposed to supply power to the load.

The invention discloses a multi-layer welding strip and a battery piece conveying device. The device comprises a split synchronous belt conveyor line, a battery piece conveying part, a floating positioning station, a welding strip gripping and clamping part, a welding strip sucking and releasing part and a series welding battery string transmission line. According to the invention, a photovoltaic battery module can be easily produced by the cooperation between the parts; the solar battery pieces in the photovoltaic battery module are welded in a staggered mode, which can simplify the production technical process and improve the production efficiency as compared with the traditional series welding process of a battery string welded by single battery pieces in series. In addition, the output voltage and output current of the photovoltaic battery module can be improved at the same time, and the output power is then improved. The photovoltaic battery sub modules with an imbricate structure are compact in structure and reasonable in layout.

The invention discloses a three-dimensional heterojunction isotope battery based on a carbon nanotube film and a preparation method of the three-dimensional heterojunction isotope battery. A transduction structure of the isotope battery comprises a substrate, a back electrode, a patterned insulating layer, and a positive electrode on the insulating layer; the front side of the substrate of the transduction structure is provided with a three-dimensional array structure, and the carbon nanotube film is deposited on the surface of the front side of the first substrate; a heterojunction is formed on a contact part of the carbon nanotube film and the substrate so as to form ohmic contact with the positive electrode; a source structure comprises a substrate and a radioactive isotope film on the surface of the substrate; the source structure and the transduction structure are aligned and sealed together, contact parts of the source structure and the transduction structure are electrically isolated, and the radioactive isotope film of the source structure and the heterojunction of the transduction structure are opposite to each other and are positioned in a cavity formed by sealing. By the three-dimensional structure in the isotope battery, an action area of a device is effectively enlarged, and the performance of the device is improved. Moreover, due to the heterojunction formed by contacting the carbon nanotube film with other semiconductor materials, the conversion efficiency of the isotope battery is improved.

The invention provides a sliding friction based impulse generator and a power generation method. The generator comprises a first friction layer, a second friction layer and a touch switch, wherein the upper surface of the first friction layer is provided with a first electrode layer in a contact mode, the lower surface of the second friction layer is provided with a second electrode layer in a contact mode, the first electrode layer and the second electrode layer are conducted through turning on the touch switch after sliding friction is generated between the lower surface of the first friction layer and the upper surface of the second friction layer and the contact area is changed, the touch switch is turned off after the impulse generator outputs impulse electric signals, and so on. Mechanical energies such as rotations, vibrations and the like applied to the generator are converted into the impulse electric signals to output.

The invention discloses a magnetic conductive material based piezoelectric-electromagnetic composite vibration energy capturing device, which comprises a base, a cantilever beam, a piezoelectric plate, three hollow permanent magnets, an iron core, a magnetic yoke and an induction coil, and is characterized in that the piezoelectric plate is arranged at the upper surface of the cantilever beam, one end of the cantilever beam is fixed in the environment, one end of the iron core is fixed at the tail end of the cantilever beam, and the three hollow permanent magnets are parallelly inserted and fixed on the iron core; the internal part of the magnetic yoke is provided with two groups of parallel magnetic teeth, the induction coil is placed between the two groups of magnetic teeth, and the bottom end of the magnetic yoke is fixed on the base; and the permanent magnets are located right above the magnetic yoke. The piezoelectric-electromagnetic power generation device can better adapt to capturing for random, wideband, low-frequency, large-amplitude and high-strength vibration energy in the environment.

The invention discloses a charge pump capable of eliminating threshold voltage influence. The charge pump is obtained by improving a CTS2 charge pump structure, an NMOS (n-channel metal oxide semiconductor) tube serving as a transmission tube at the last level of the CTS2 charge pump is replaced by a PMOS (p-channel metal oxide semiconductor) tube, and PMOS tube control voltage is switched between zero and output voltage via high-low change of a clock. The charge pump is simple in structure, output voltage and efficiency are improved, and promotion and application are benefited.

The invention relates to a water-cooled middle-high-frequency transformer for a resistance welding machine. The invention provides the middle-high-frequency transformer, wherein a main transformer comprises a magnetic core, a primary winding and a secondary winding; the middle part of the primary winding is provided with three to eleven groups of primary coils, each group of primary coils is formed by connecting two coils in series, which have the same number of turns and are wound in the forward and reverse directions, and each group of primary coils is provided with two lead-out terminals; two ends of the primary winding are respectively provided with a group of primary small coils, the two groups of primary small coils are connected in series, the two groups of primary small coils are provided with two lead-out terminals; dotted terminals in all the lead-out terminals in the primary winding are connected mutually, namely the dotted terminals are connected in parallel to form two input terminals of the main transformer; the secondary winding comprises one to five groups of secondary coils and centre taps led out from the secondary coils, dotted terminals in two lead-out terminals of all the secondary coils are connected in parallel to form two lead-out terminals, the two lead-out terminals are respectively connected with diodes and are then combined to form a first output terminal of the main transformer, and the centre taps are used as a second output terminal of the main transformer.