37results about How to "Avoid current fluctuations" patented technology

The invention discloses a hybrid triggering type driving power source for a power system fault detector. The hybrid triggering type driving power source mainly comprises a diode rectifier U, a nonlinear trigger circuit connected with the diode rectifier U, a buffering crystal oscillator circuit and a quartz crystal oscillator circuit, wherein the buffering crystal oscillator circuit and the quartz crystal oscillator circuit are connected with the nonlinear trigger circuit. The hybrid triggering type driving power source is characterized in that a power logic voltage-stabilizing circuit is connected between the diode rectifier U and the nonlinear trigger circuit and mainly comprises a power amplifier P1, an NAND gate IC1, an NAND gate IC2, an NAND gate IC3, an NAND gate IC4 and a diode D2, wherein the N pole of the diode D2 is connected with the output end of the power amplifier P1 and the P pole of the diode D2 is grounded after passing through a resistor R4. According to the hybrid triggering type driving power source, the circuit structure can be greatly simplified, radio-frequency interference of the circuits and radio-frequency interference of external connection can be lowered, and the manufacturing cost and the maintenance cost are greatly lowered.

The invention discloses a novel light beam excitation type image processing system based on a logic protection emitter-coupled type. The novel light beam excitation type image processing system based on the logic protection emitter-coupled type is mainly composed of an image sensor, a drive circuit and a processing circuit, wherein the drive circuit is connected wit the image sensor, and the processing circuit is connected with the drive circuit. The novel light beam excitation type image processing system is characterized in that an emitter-coupled type asymmetrical triggering circuit, a light beam excitation type logic amplifying circuit and a logic protection emitter-coupled type amplifying circuit are further arranged, the emitter-coupled type asymmetrical triggering circuit is connected with the drive circuit and the processing circuit, the light beam excitation type logic amplifying circuit is connected with the processing circuit, and the logic protection emitter-coupled type amplifying circuit is connected between the laser beam excitation type logic amplifying circuit and the drive circuit in series. According to the novel light beam excitation type image processing system, the overall structure is quite simple, after the emitter-coupled type asymmetrical triggering circuit is combined with the novel light beam excitation type image processing system, the processing speed of the novel light beam excitation type image processing system is greatly increased compared with a traditional speed, the processing time of an image with 1028*1028 pixels is just 0.3s, and the processing speed is over 20 times as high as a traditional processing speed.

The invention discloses a stable energy harvesting device for a high-voltage transmission line and an application method thereof. The energy harvesting device includes a damping branch, an energy harvesting branch and an impedance regulating branch. The impedance regulating branch includes a regulating magnetic core T3 and a second wire l3 , a control rectifier circuit, a supercapacitor energy storage unit and an inverter circuit, a first switch K1 is connected in series between the second wire l3 and the power transmission cable, and a series connection between the supercapacitor energy storage unit and the load connection terminal of the energy-taking branch A second switch K2 is connected, and a third switch K3 is connected in series between the supercapacitor energy storage unit and the inverter circuit; the application method includes using the impedance regulation branch as a controllable current source to control the charging of the supercapacitor energy storage unit, The switching of the discharge state and the connection state of the output of the inverter circuit adjust the impedance of the damping branch to realize the stable energy collection of the high-voltage transmission line. The invention can obtain stable energy acquisition for the load when the current of the transmission line changes, and has the advantages of high energy acquisition stability, good real-time performance and fast response.

The invention relates to the technical field of photovoltaic grid-connected inverters. A photovoltaic inverter employing a hybrid type power device comprises two parts, namely, a power inversion unit and an inversion control unit, wherein the power inversion unit mainly comprises an input EMI (Electro-Magnetic Interference) filter circuit, an interleaving Boost boosted circuit, a full bridge inversion circuit employing a mixer and an output grid-connected filter circuit; the inversion control unit mainly comprises a power grid phase detection circuit, a sampling circuit and a controller. The photovoltaic inverter adopts a double-stage structure, and the first stage adopts interleaving Boost boosted voltage, so that the fluctuation of current is reduced, and output voltage ripple is reduced; the later stage inversion unit adopts a hybrid power device, so that the inversion consumption is effectively reduced, and the system efficiency is improved. The photovoltaic inverter has the characteristics of simple structure, easiness in circuit control and convenience in capacity expansion.

A method for controlling a static converter connected to a direct-current source. The converter has power conductor switches that can be deactivated and is configured to supply a distribution network with three-phase voltage. The currents flowing through the respective power semiconductor switches are measured, current values respectively assigned to the power semiconductor switches are obtained, the current values are sampled and digitized to obtain digital current values. The latter are checked by a logic in a control unit for the presence of an excess current condition. If no excess current condition is detected, the power semiconductor switches are activated and deactivated with the aid of a nominal operation controller and if an excess current condition is detected, at least the power semiconductor switches with assigned digital current values that fulfill the excess current condition are deactivated after a pulse block has expired. For the digital current values that fulfill the excess current condition, all power semiconductor switches, which are connected to the positive direct-current terminal, are activated and all power semiconductor switches, which are connected to the negative direct-current terminal are deactivated or vice versa. For the digital current values that do not fulfill the excess current condition, the power semiconductor switches are controlled once again by the nominal operation controller.

The present invention discloses a flash memory control apparatus and a flash memory mobile storage apparatus. The flash memory control apparatus comprises a mobile device host interface unit, a command analysis unit, a data processing unit, a clock generator unit and a flash memory interface unit. The flash memory mobile storage apparatus comprises the flash memory control apparatus and a flash memory. The command analysis unit determines a data operation command sent by a mobile device host and generates a clock frequency control signal according to a determination result; the clock generator unit generates flash memory system clocks with different frequencies according to the clock frequency control signal; and the flash memory control apparatus reads and writes data according to the frequencies. According to the flash memory control apparatus and the flash memory mobile storage apparatus disclosed by the present invention, on the premise of satisfying maximum power supply current restriction of the mobile device host, the read / write performance of the flash memory is improved to the maximum extent.

The invention discloses a symmetric transmission type driving power source for a power system fault detecting device. The symmetric transmission type driving power source is characterized by mainly comprising a diode rectifier U, a nonlinear trigger circuit, a main quartz crystal oscillator circuit, an auxiliary quartz crystal oscillator circuit and a power logic voltage stabilizing circuit; the nonlinear trigger circuit is connected with the diode rectifier U, the main quartz crystal oscillator circuit and the auxiliary quartz crystal oscillator circuit are connected with the nonlinear trigger circuit, and the power logic voltage stabilizing circuit is arranged between the diode rectifier U and the nonlinear trigger circuit in a serial connection manner; the power logic voltage stabilizing circuit comprises a power amplifier P1, an AND-NOT gate IC1, an AND-NOT gate IC2, an AND-NOT gate IC3, an AND-NOT gate IC4, an N (negative) pole and the like, and the N pole is connected with an output end of the power amplifier P1. The symmetric transmission type driving power source has the advantages that the power logic voltage stabilizing circuit and the nonlinear trigger circuit are creatively combined with each other, accordingly, circuit structures can be greatly simplified, radio frequency interference of the circuits and external radio frequency interference can be reduced, and the manufacturing cost and the maintaining cost can be greatly lowered.

The invention discloses a double-buffering trigger type driving power source for a power system fault detecting device. The double-buffering trigger type driving power source mainly comprises a diode rectifier U and a nonlinear trigger circuit. The nonlinear trigger circuit is connected with the diode rectifier U. The double-buffering trigger type driving power source is characterized by further comprising a double-buffering quartz crystal oscillator circuit and a power logic voltage stabilizing circuit; the double-buffering quartz crystal oscillator circuit is connected with the nonlinear trigger circuit, and the power logic voltage stabilizing circuit is arranged between the diode rectifier U and the nonlinear trigger circuit in a serial connection manner; the power logic voltage stabilizing circuit comprises a power amplifier P1, an AND-NOT gate IC1, an AND-NOT IC2, an AND-NOT IC3, an AND-NOT IC4 and the like. The double-buffering trigger type driving power source has the advantages that the power logic voltage stabilizing circuit and the nonlinear trigger circuit are creatively combined with each other, accordingly, circuit structures can be greatly simplified, radio frequency interference of the circuits and external radio frequency interference can be reduced, and the manufacturing cost and the maintaining cost can be greatly lowered.

The invention relates to a method for operating at least one electric component (11) of a vehicle (10) using a battery (12). At least two battery cells (30) of the battery (12) are electrically connected to the at least one component (11) via at least one respective switching unit (20) and are thus switched on, wherein the following steps are carried out in order to pre-charge an intermediate circuit (13) of the vehicle (10): a) switching on a first battery cell (30a) of the battery cells (30) and b) switching on at least one second battery cell (30b) of the battery cells (30) in steps, in each case following a previous switching on process.

The invention discloses a driving power source for a power system fault detecting device. The driving power source mainly comprises a diode rectifier U, a power amplifier P1, a transformer T, a switch filter circuit, a slider regulator, a power output circuit and a voltage transformation feedback circuit. The switch filter circuit is arranged between an anode output end of the diode rectifier U and a same-phase end of the power amplifier P1 in a serial connection manner, the slider regulator is connected with a sliding tap of a primary coil L1 of the transformer T, the power output circuit is connected with a secondary coil L2 of the transformer T, and the voltage transformation feedback circuit is connected with a secondary coil L3 of the transformer T. The driving power source has the advantages that high-quality input voltages can be provided for the transformer T by a novel power logic voltage stabilizing circuit, accordingly, circuit structures can be simplified, radio frequency interference of the circuits and external radio frequency interference can be reduced, and the manufacturing cost and the maintaining cost can be greatly lowered.

The invention discloses a metallic micro component pickup method based on electrochemical deposition, relates to the metallic micro component pickup method, and aims to solve the problem that an existing metallic micro component is difficult to pick up and prone to damage. The pickup method comprises the following steps of calculating the minimum nozzle radius of a pipette capable of successfullypicking up according to stress conditions of a pick-up object and selecting a pipette; and calculating steady-state current, deposition height and deposition time, and then switching on a power supplyfor pick-up. According to the metallic micro component pickup method, when metallic micro components are required to pick up, the adopted pipette is small in size, and can pick up the metallic microcomponents of various types so that have application in producing complex micro electro mechanical system, and meanwhile the metallic micro components are not damaged when being picked up. The methodis suitable for picking up metallic micro components.

The invention discloses a logic control circuit based power source for a power system fault detection device. The power source mainly comprises a transformer diode trigger circuit, a power logic control circuit, a primary crystal oscillating circuit and a secondary crystal oscillating circuit, wherein the primary crystal oscillating circuit and the secondary crystal oscillating circuit are connected with the transformer diode trigger circuit. The power source is characterized by further comprises a power logic control circuit connected with the transformer diode trigger circuit, the transformer diode trigger circuit comprises a diode rectifier U, a transformer T and a trigger circuit, and the primary crystal oscillating circuit and the secondary crystal oscillating circuit are both connected with the trigger circuit . The logic control circuit based power source has the advantages that circuit structures can be greatly simplified to reduce intrinsic and external radio-frequency interference for the circuits, and accordingly manufacturing cost and maintenance cost are greatly reduced; in addition, delay effects of traditional power circuits can be overcome effectively, and quality of the power source can be effectively improved.

The invention discloses a logic protection emitter coupling reverse current source graphic processing system which is mainly composed of an image sensor, a drive circuit connected with the image sensor, a processing circuit connected with the drive circuit, an emitter coupling asymmetric trigger circuit connected with the processing circuit and a precise reverse current source circuit connected between the drive circuit and the processing circuit in series. The system is characterized in that a light beam excitation type logic amplifying circuit is connected between the emitter coupling asymmetric trigger circuit and the drive circuit in series and a logic protection emitter coupling amplifying circuit is further connected between the light beam excitation type logic amplifying circuit and the drive circuit in series. The logic protection emitter coupling reverse current source graphic processing system is quite simple in overall structure, and combined with the emitter coupling asymmetric trigger circuit, the system has the advantages that the processing speed is greatly increased compared with the traditional speed, an image with 1028 pixel *1028 pixel is processed only within 0.3 s, and the processing speed is more than 20 times of the traditional processing speed.

The present application relates to a position sensorless BLDCM closed-loop starting method, device and BLDCM control equipment. The position sensorless BLDCM closed-loop startup method includes sequentially controlling the current loop PI regulator, observer PI regulator and speed loop PI regulator to enter the closed-loop working state according to the set execution cycle; according to the three-phase current detection results of the current loop PI regulator , to determine the current operating state of the position sensorless BLDCM under the set initial quadrature axis current; according to the current operating state of the position sensorless BLDCM and the set minimum electrical angle speed reference threshold, adjust through the current loop PI regulator and observer PI Controller and speed loop PI regulator closed-loop start sensorless BLDCM. During the entire start-up process of the position sensorless BLDCM, the control speed outer loop, current inner loop and speed / angle observer are all in a closed-loop working state, which effectively reduces the start-up current and shortens the start-up time, and achieves the purpose of effectively improving the start-up efficiency.

The invention relates to an assembly die, in particular relates to an electron gun assembly die and an assembling method thereof. The electron gun assembly die comprises an upper location die, a cover die and a supporting seat, wherein the upper location die covers and presses on the cover die; and the supporting seat is placed under a cover plate of the gun. Through the whole set of assembly dies of the electron gun and a proper technical operation process, a non-inductive electron-tube heater and a lead electrode can be well contacted so as to avoid current fluctuation or more serious consequences caused by heat emission and ignition of current, ensure concentricity of an emitting surface of the non-inductive electron tube heater, a focusing electrode hole and a shoulder surface of the cover plate of the gun and non-deviated non-defocused electron bunch. The assembly die ensures the interelectrode distance between the emitting surface of the non-inductive electron tube heater and anend surface of a focusing electrode, contributes to electron emission. By the die and the correct technical operation, the yield of the electron gun can be improved, the optical parameter requirementof electrons can be ensured, and parts of the electron gun have good interconvertibility and other significant effects.

The invention relates to the field of corrosion of steel bars in concrete and particularly relates to a method for predicting initial corrosion time of steel bars in concrete. The method comprises thefollowing steps: taking chloride ion diffusion coefficients as a random variables, determining a group of chloride ion diffusion coefficient data according to experiment, combining with a migration model of chloride ions in the concrete to obtain time data reaching critical concentration of the chloride ions when reaching a certain depth, and building a response surface of the chloride ion diffusion coefficient and the time reaching critical concentration of the chloride ions; actually measuring a group of time reaching the critical concentration of the chloride ions and obtaining a group ofnew chloride ion diffusion coefficients by using the response surface; combining the group of new chloride ion diffusion coefficients with the migration model of chloride ions in the concrete to obtain a group of initial corrosion time data of the steel bars in the steel bar depth, and counting to obtain the probability distribution of the initial corrosion time of the steel bars.