17results about How to "Stable output voltage" patented technology

This application discloses a method, apparatus, storage medium, and product for controlling the current of a charge-and-discharge power supply. The method includes acquiring a target adjustment command, which includes a target current increment. This target current increment is the difference between a first preset current and a second preset current. The first preset current is the target current of the previous adjustment cycle, and the second preset current is the target current of the current adjustment cycle. The method also includes acquiring a voltage increment based on multiple target parameters and the target current increment. These multiple target parameters include the battery electromotive force, battery internal resistance, and line impedance of the charge-and-discharge power supply when it was in a stable state in the previous adjustment cycle. Finally, the method includes acquiring an adjustment amount based on the voltage increment and adjusting the output current of the charge-and-discharge power supply based on the adjustment amount. This method can improve the response speed while ensuring the stability of the output current of the charge-and-discharge power supply.

This application provides a hybrid magnetic circuit and intelligent flux distribution current transformer energy harvesting device and method to solve the problems of low sensitivity for small current energy harvesting and weak resistance to large current saturation in current transformer energy harvesting devices. The device includes a hybrid magnetic circuit unit, a magnetic state detection unit, and an intelligent flux distribution unit. The hybrid magnetic circuit unit includes a first magnetic circuit and a second magnetic circuit connected in parallel and magnetically coupled. An energy harvesting winding and an auxiliary control winding are wound on the first and second magnetic circuits, respectively. The magnetic state detection unit monitors the magnetization state of the first magnetic circuit, and the intelligent flux distribution unit injects controllable current into the auxiliary control winding to adjust the flux ratio flowing through the first and second magnetic circuits. By constructing a parallel hybrid magnetic circuit and implementing active flux distribution, this application ensures that the first magnetic circuit operates in the ideal linear region under any transmission conductor current, thereby simultaneously achieving ultra-high sensitivity for small current energy harvesting and extremely strong resistance to large current saturation.

The application relates to the technical field of LED circuit, in particular to a lamp color adjusting circuit with a thyristor light modulation module, which comprises a rectifier circuit, a multi-grade dial code color adjusting circuit, a frequency flash removing circuit, a thyristor current discharge circuit and a constant current light modulation circuit. The rectifier circuit converts an alternating current power supply into a direct current voltage to supply power to a circuit system. The multi-grade dial code color adjusting circuit adjusts the current distribution of LED lamp beads through a dial code switch and a second group of resistors, generates a color adjusting signal, carries out low-pass filtering and dynamic compensation on the color adjusting signal, and outputs a pure control signal to the thyristor current discharge circuit. The thyristor current discharge circuit adjusts a current path according to the control signal to provide a smooth and adaptive power supply for the constant current light modulation circuit. The constant current light modulation circuit realizes constant current output. The design significantly reduces the hardware cost and the complexity of the circuit system, effectively suppresses electromagnetic interference in combination with the low-frequency modulation characteristics of the thyristor, and realizes the balance between light modulation precision and the stability of the circuit system.

The invention discloses an unmanned ship anti-offset wireless power transmission system based on a reconfigurable trapezoidal magnetic coupling mechanism, and the system comprises an MCR-WPT topological structure based on an LCC-S compensation network, and the topological structure comprises an inverter circuit, the LCC-S compensation network based on a reconfigurable coil, a rectification circuit, and a DC-DC converter. The input end of the inverter circuit is connected with a power supply and is used for converting the power supply into a high-frequency alternating-current power supply; the LCC-S compensation network based on the reconfigurable coil comprises a primary side and a secondary side, the input end of the primary side is connected with the output end of the inverter circuit, an anti-offset magnetic coupling mechanism is connected between the primary side and the secondary side, and the output end of the secondary side is connected with the rectifying circuit; the rectifying circuit is used for converting the high-frequency alternating current into direct current; and the DC-DC converter is used for completing the conversion of the voltage level of the output end. According to the invention, the magnetic coupling mechanism can be flexibly adjusted for unmanned ships with different voltage levels so as to realize efficient charging, and the offset resistance of the system is enhanced.

This invention relates to the field of semiconductor detection technology and discloses a mass spectrometry device with a variable configuration energy analyzer and its control method. By coordinating a variable slit mechanism, an electrode system, and a mode switching controller, this invention enables the same mass spectrometry device to flexibly switch between two operating modes: wide energy acquisition and high sensitivity, and narrow passband and high energy resolution. This resolves the contradiction that existing fixed-parameter energy analyzers cannot simultaneously meet the needs of different analytical tasks. Through pre-storing target operating mode parameter sets and a parallel control strategy, parameters for all operating modes are pre-calculated and calibrated, and can be directly recalled during mode switching without real-time calculation. Simultaneously, the slit width, the output voltage of each electrode, and the operating status of the ion source components are adjusted, effectively reducing the mode switching time and ensuring that the switching time is controlled within a set time, meeting the requirements for online real-time switching during process operations.

A lead-free piezoelectric energy harvesting ceramic material system with stable output voltage and controllable output current and its preparation are disclosed, belonging to the field of piezoelectric ceramic materials. The matrix chemical composition of this ceramic material is (1-x)(K 0.48 Na 0.52 (Nb) 0.96 Sb 0.04 O3-x(Bi) 0.5 Na 0.5 ZrO3 with x values ​​of 0.015, 0.03, and 0.04 exhibits stable output voltage and progressively increasing output current density in these three systems. Samples are prepared by wet grinding, drying, granulation, pressing, and sintering according to the corresponding stoichiometric ratios. This invention achieves stable output voltage and controllable output current density within the same lead-free piezoelectric ceramic material system, significantly advancing piezoelectric energy harvesting technology.

This invention discloses a voltage recovery control method and system for grid-connected wind farms after faults based on variable reactive power coefficients. The method includes: acquiring parameters of the grid-connected wind turbine generators and their operational requirements; determining the feasible region of reactive power output for the grid-connected wind turbine generators based on these parameters and operational requirements, combined with voltage-reactive power droop control constraints, and evaluating the maximum reactive power support and dynamic voltage support capabilities of the grid-connected wind turbine generators to obtain evaluation results; establishing an integrated model for voltage recovery control after faults involving the wind turbine generators, the wind farm, and the power grid, transforming the feasible region of reactive power output and the evaluation results into control constraints, and calculating the optimal reference value for the reactive power coefficient of the wind turbine generators to regulate each wind turbine generator. This invention aims to ensure the stability of node voltages in grid-connected wind farms under strong disturbances, maximize reactive power support and dynamic voltage support capabilities, and improve the voltage recovery control capability after wind farm faults.

This invention relates to the field of voltage regulator circuit technology and discloses an LDO voltage regulator circuit for a PoE power supply system, including an error amplifier, a slew rate enhancement circuit, and a power transistor M11. In practical use, this invention compares the reference voltage VREF and the output voltage of the LDO voltage regulator circuit with the error amplifier, and adjusts the charge release control of the power transistor M11 control terminal based on the feedback signal output by the error amplifier. This allows for a rapid response when the output voltage of the LDO voltage regulator circuit fluctuates, thereby ensuring the stability of the LDO voltage regulator circuit's output voltage.

The application relates to the technical field of lithium-sulfur batteries, in particular to a high-energy-density lithium-sulfur battery for humanoid robots, which comprises an outer shell and a plurality of cell modules arranged in the outer shell, the cell modules are connected in series with each other, and each cell module comprises a plurality of cell monomers; the cell monomer comprises a lithium-sulfur cell inner shell, a liquid storage cavity is formed between the lithium-sulfur cell and the inner shell, the liquid storage cavity is filled with an insulating fluid, and a deformable isolation component is arranged between the inner shell and the lithium-sulfur cell; the inner shell is further provided with a fluid channel and a pushing cavity which are in communication with the liquid storage cavity, and the pushing cavity is provided with a movable pushing component; a movable electric connecting component is connected to the positive electrode of the lithium-sulfur cell, and the movable electric connecting component is configured to move between a first position in electric connection with the positive electrode and a second position disconnected with the positive electrode; the application can realize active and rapid power-off at the cell level, and fundamentally improves the safety and reliability of the lithium-sulfur battery in the application of humanoid robots.

The embodiment of the present application provides a low dropout regulator, a chip and a chip system. The low dropout regulator comprises a regulator circuit, a bypass transistor and a bypass control module. The regulator circuit is coupled between a power supply voltage terminal and a common reference ground terminal and has a voltage output terminal connected to a load, and the regulator circuit is used to provide an output voltage to the load at the voltage output terminal when a power supply voltage provided at the power supply voltage terminal is greater than a preset voltage; the bypass transistor is coupled between the power supply voltage terminal and the voltage output terminal, and is used to provide the output voltage to the load at the voltage output terminal when turned on; and the bypass control module is coupled to a control terminal of the bypass transistor, and is used to control the bypass transistor to be turned on when the power supply voltage is less than or equal to the preset voltage. The low dropout regulator provided by the embodiment of the present application can ensure that the output voltage is stable, will not be dithered by the disturbance of the power supply voltage and the ground voltage, and will not be interrupted due to the low power supply voltage.

The invention relates to the technical field of motor self-energy supply, and discloses a self-energy-supply variable-frequency and variable-speed motor based on vibration energy recovery, which comprises a variable-frequency motor, a variable-frequency box is mounted at the top end of the variable-frequency motor, an energy storage assembly is mounted in the variable-frequency box, and the energy storage assembly comprises a cylinder fixedly connected in the variable-frequency box. A sliding column is slidably connected into the column body, an energy storage spring is fixedly connected between the end of the sliding column and the column body, a plurality of second fixing pieces are fixedly connected to the outer wall of the sliding column, first fixing pieces corresponding to the second fixing pieces are arranged at the upper end and the lower end of the inner wall of the frequency conversion box, and transmission rods are hinged between the first fixing pieces and the second fixing pieces. According to the energy recovery device, physical buffering and stable-pressure output of vibration energy are achieved, the energy recovery efficiency is improved, and meanwhile the heat dissipation problem during low-speed operation of the variable frequency motor is solved.

The utility model provides an on-line monitoring and diagnosing system for a flowmeter, and belongs to the technical field of monitoring and diagnosing systems. Comprising a master control circuit, a power circuit, a diagnosis circuit and an indication circuit. The power supply circuit provides direct current for the main control circuit, the diagnosis circuit and the indication circuit, the power supply circuit comprises an alternating current voltage reduction unit, a first voltage stabilization unit, a second voltage stabilization unit and a signal isolation unit, and the alternating current voltage reduction unit is used for reducing the voltage of an alternating current power supply and converting the reduced alternating current into the direct current; the output voltage can be finely adjusted by adjusting the potentiometer R5, the voltage output from the chip LM is input into the voltage stabilizer WD, after the voltage is further stabilized by the voltage stabilizer WD, stable direct-current voltage is output from a pin Vout of the voltage stabilizer WD to be used by the single-chip microcomputer UF, the smooth and stable direct-current voltage can guarantee normal work of the single-chip microcomputer UF, the photoelectric coupler U1 can electrically isolate external signals, and the output voltage of the single-chip microcomputer UF is greatly improved. The anti-interference capability of the circuit is enhanced, and the internal circuit is protected, so that the monitoring and diagnosis system can work continuously and stably.

The utility model provides a kind of DC switching power supply and electric sliding door controller of electric sliding door, including main control circuit, motor drive circuit and switching power supply circuit, switching power supply circuit includes rectifier filter module and high frequency conversion module, width modulation square wave rectifier filter module and sampling comparison modulation module, switching power supply further includes voltage stabilizing module, voltage stabilizing module includes first stabilizer and second stabilizer, the input end of first stabilizer is connected with the output side of width modulation square wave rectifier filter module, the output end of first stabilizer is connected with the input end of second stabilizer, the output end of second stabilizer is connected with the power input end of main control circuit, the output end of first stabilizer is also connected with the power input end of motor drive circuit.Construction is built with 'high frequency conversion+multistage voltage stabilizing' framework, replaces traditional direct power supply, and voltage is adapted for motor, main control respectively, voltage instability problem is solved, and equipment reliability is improved.

The application is suitable for the technical field of switching power converter, and provides a negative voltage charge pump circuit and a switching power converter. The negative voltage charge pump circuit adds a clock modulation module, a reference voltage generation module, a comparison module, a fourth driving module, a fifth power tube, a sixth power tube and a seventh power tube on the existing charge pump. When the negative voltage charge pump circuit enters a light load working condition, the large-size power tube and its driving module are closed, only the small-size power tube is kept working, and the small-size power tube automatically judges whether to work according to the absolute value of the output voltage, so that the working current of the negative voltage charge pump circuit is greatly reduced, and the conversion efficiency of the negative voltage charge pump circuit in the light load is improved. At the same time, the pulse width modulation processing is carried out by means of the narrow pulse modulation unit in the clock modulation module, the clock signal for driving the small-size power tube is optimized, and the circuit power consumption in the light load is further reduced.

The application discloses a pre-stabilization circuit, a PCB and a controller, comprising a start bias unit, a pre-stabilization unit, an enable control unit, a high-voltage bandgap reference unit and an output buffer unit. The start bias unit can provide forced start at the moment of power-on, ensure the circuit to get rid of the degenerate point and establish stable bias, and automatically exit after the start is completed. The pre-stabilization unit generates two signals based on the bias: one is a driving signal suitable for high-voltage LDMOS, which improves the high-voltage adaptability of the circuit; the other is a control signal of the reference circuit, which is used for enable management. The enable control unit selects the control signal through an external signal, realizes work mode control, and cuts off the bias to reduce static power consumption when it is turned off. The high-voltage bandgap reference unit starts after obtaining the driving and bias, uses internal temperature compensation and closed-loop adjustment mechanism to output low-drift reference voltage. The output buffer unit enhances the load capacity of the reference voltage, and forms a global closed loop through feedback.

The utility model discloses a multipath isolation power supply voltage controller, relates to the multipath power supply control technology field, and comprises a gear selection module, a control module and a power supply module which are adaptively connected, the control module comprises a plurality of control units, the power supply module comprises a plurality of power supply units, and the power supply units are connected with the gear selection module. The plurality of control units are in one-to-one correspondence with the plurality of power supply units; the gear selection module is used for selecting a target gear from a plurality of preset power supply voltage gears, the control unit comprises a plurality of switch elements, and the plurality of switch elements in the control unit are in one-to-one correspondence with the plurality of power supply voltage gears; in any control unit, the switch element corresponding to the target gear is used for controlling the corresponding power supply unit in the power supply module to output the power supply voltage corresponding to the target gear. The multipath isolation power supply voltage controller provided by the utility model can synchronously adjust the output voltage of multipath power supplies, and has the technical characteristics of high reliability, simple operation and convenient maintenance.

The application discloses a Cuk type power factor correction circuit based on a switching inductor, which comprises switching tubes S1-S3, diodes D1-D5, inductors L1-L5, capacitors C1 and C o Among them, diodes D3-D5 and inductors L3 and L4 form a switching inductor structure.The converter voltage gain is D / (2-D), compared with a traditional Cuk PFC converter, the power factor correction circuit realizes positive voltage output, improves the step-down gain, ensures that the whole duty cycle range is in a step-down state, and the duty cycle is larger than that of the traditional Cuk PFC converter in the case of high step-down ratio, and the emergence of the limit duty cycle condition is effectively avoided.The application of the bridgeless structure can realize lower on-state loss.The power factor correction circuit has the advantages of continuous input and output current, high power factor and high efficiency, and has great practical value.