27results about How to "Stable output voltage" patented technology

The invention provides a network construction type photovoltaic system control method supporting active support of power grid frequency, and the method comprises the steps: (1) designing a PV system power reduction operation control strategy which is used for enabling a PV system to reserve power to participate in frequency adjustment of a power grid; (2) designing a PI-based DC bus voltage control strategy for adjusting the DC bus voltage to a reference value; (3) designing a load side step-down operation control strategy based on PI, wherein the strategy is used for stabilizing the DC bus voltage in an off-grid mode; (4) designing a VSG control strategy, and enabling the network-forming inverter to simulate a synchronous generator to participate in active frequency modulation; and (5) in a grid-connected mode, designing a pre-synchronization control strategy, and enabling the grid-forming inverter and the power grid to operate in a grid-connected manner. According to the invention, the frequency stability of the new energy high-permeability power system can be improved. In addition, the method only depends on local information, does not need a maximum power point estimator, a central controller or a solar radiation sensor, and has the advantage of low implementation cost.

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.

The invention provides a negative single-particle transient reinforcing circuit and method based on a comparator and a resistance network, the negative single-particle transient reinforcing circuit comprises the comparator, the resistance network, a transistor and a capacitor, the positive electrode input end of the comparator is connected with the output end of a BGR, the negative electrode input end of the comparator is connected with the resistance network, and the transistor is connected with the capacitor. The output end of the comparator is connected with the grid electrode of the transistor, the drain electrode of the transistor is connected with the positive electrode input end of the comparator, the source electrode of the transistor is connected with one end of the capacitor and the voltage output end, and the other end of the capacitor is grounded. The plurality of resistors comprise a fifth resistor, a sixth resistor and an Nth resistor RN (N is an integer greater than 5). According to the negative single-particle transient reinforcing circuit based on the comparator and the resistance network, the Vref voltage output by the BGR subjected to SET is adjusted in real time based on the comparator, the circuit can be effectively reinforced, and the output voltage can be stabilized within a certain range.

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.

The present invention discloses an energy collection and vehicle fault monitoring system for active vibration reduction. In the present invention, the slide bar fixed on the upper pressure plate and the lower slide groove constitute a sliding pair; the slide bar is sleeved with a vibration reduction spring; one end of the left and right wing support plates are respectively hinged to the two sides of the lower slide groove; the left ratchet is hinged to the other end of the left wing support plate and connected through a left torsion spring; the right ratchet is hinged to the other end of the right wing support plate and connected through a right torsion spring; the middle of the left and right wing support plates are connected through a balance spring; the ratchet is fixed on the input shaft of a micro-generator; the power output end of the micro-generator is connected to an energy storage battery; the monitoring system collects the electrical signal output by the micro-generator, and monitors and analyzes vehicle faults. The present invention can collect vibration energy within half a cycle of vibration of the vehicle's entire suspension system, has a high energy conversion rate, and has an active vibration reduction effect, can provide a stable output voltage, and can perform fault detection of the vertical stiffness of the suspension without detecting the suspension system.

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 circuit structure for a charging box provided by the present invention is used for independently charging and / or communicating two loads placed in the charging box, including: a charging module, a communication module, a common control module, a first electrical contact point, and a second electrical contact point; the charging module includes a voltage input terminal, a first switch unit, and a second switch unit, and the second end of the first switch unit and the second end of the second switch unit are respectively connected to the first electrical contact point and the second electrical contact point; the communication module includes a signal input terminal, a third switch unit, and a fourth switch unit, and the second end of the third switch unit and the second end of the fourth switch unit are respectively connected to the first electrical contact point and the second electrical contact point; the common control module controls the on and off of the first switch unit, the second switch unit, the third switch unit, and the fourth switch unit respectively.

This utility model proposes a deep integration primary and secondary FTU power harvesting circuit system for power distribution networks, comprising: a voltage divider circuit, a rectifier circuit, and a waveform correction circuit; the voltage divider circuit is electrically connected to the rectifier circuit, and the rectifier circuit is electrically connected to the waveform correction circuit; the deep integration primary and secondary FTU power harvesting circuit system for power distribution networks adopts a combined design of a voltage divider circuit and a waveform correction circuit. The waveform correction circuit ensures that the rectified voltage and current are in phase and the output voltage is stable, making the overall load on the secondary side of the transformer resistive, thereby improving power supply stability and reducing reactive power generation.

The invention discloses an outdoor high-voltage ring main unit, and belongs to the technical field of high-voltage ring main units, the outdoor high-voltage ring main unit comprises a ring main unit body, the ring main unit body is provided with a regulation and control assembly, the regulation and control assembly comprises a supporting lining frame arranged in the ring main unit body, and the supporting lining frame is provided with a plurality of transformers used for voltage conversion. High voltage can be reduced to low voltage through the voltage stabilizer, output voltage is kept stable, the electrode holder can be transferred to one end of the corresponding second conductive pin, current conveyed by the second conductive pin can be transferred to the electrode holder easily to be conveyed, the controller is driven by the first driving motor to rotate, and the output voltage is kept stable. And when the controller rotates, the positions of the insulating frame and the electrode holder are adjusted, so that the electrode holder can be better contacted with one end of the second conductive pin, the electrode holder is contacted with the second conductive pin to quickly open and close, and the convenience and efficiency during current conversion are improved.

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.

An output stabilization circuit (1) includes: a primary-side circuit (2) including a self-oscillation circuit (10) connected to a DC power supply; and a secondary-side circuit (3) obtaining an output voltage by oscillation of the self-oscillation circuit, wherein the self-oscillation circuit includes a drive transformer of which a secondary-side coil is connected to a gate electrode of each of a plurality of switching elements connected in a half-bridge configuration or a full-bridge configuration, a feedback transformer of which a primary-side coil is connected to a power transmission coil, and a phase shift filter that is connected between a secondary-side coil of the feedback transformer and a primary-side coil of the drive transformer and includes a primary-side control coil having a characteristic that an inductance changes in accordance with a current flowing through a secondary-side control coil of the secondary-side circuit.

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 embodiment of the invention provides an isolated resonant power supply circuit, a magnetic resonance imaging system and an air-core transformer, the isolated resonant power supply circuit is arranged in a scanning room of the magnetic resonance imaging system, the isolated resonant power supply circuit comprises an inverter circuit, a resonant transformation circuit and a rectifying circuit, the inverter circuit is connected with the resonant transformation circuit, and the resonant transformation circuit is connected with the rectifying circuit. The converter is connected with the resonant transformation circuit and is used for converting input direct current into alternating current and outputting the alternating current to the resonant transformation circuit; the resonant transformation circuit is used for carrying out resonant conversion and transformation on the alternating current and then outputting the alternating current to the rectifying circuit; the rectifying circuit is used for rectifying the alternating-current output voltage output by the resonant transformation circuit into direct-current voltage to be output for power supply; wherein the resonant transformation circuit comprises a variable capacitance circuit and an inductor, and the equivalent capacitance value of the variable capacitance circuit is changed by changing the input voltage of the variable capacitance circuit.

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 relates to the technical field of filtering, in particular to a filtering device, an integrated chip, an electronic device and a vehicle. The purpose is to improve the filtering performance and safety and reliability of the filtering device, and to reduce the wiring cost and wiring complexity. The filtering device comprises: a first end for coupling a first pole of a power supply and a first pole of a load; and a second end for coupling a second pole of the power supply and a second pole of the load. The filtering device is configured to filter an electrical signal input by the first end and / or the second end, and then output the filtered electrical signal to the load by the first end and / or the second end. By multiplexing the first end and / or the second end of the filtering device, additional signal lines or power supply lines are not required under the condition of meeting the power supply demand of the filtering device, the wiring cost and wiring complexity of the filtering device are reduced, and then the interference factors such as electromagnetic interference and common-mode noise introduced are reduced, and the filtering performance of the filtering device is improved.

The application discloses a bipolar self-balancing interleaved coupled inductor high-gain converter for a direct-current microgrid, relates to the field of boost converters, and utilizes the winding ratio boost characteristic of the interleaved coupled inductor and the voltage superposition effect of the multi-stage diode-capacitor voltage doubling network to realize high-gain output and power expansion, adopts the mixed method of the voltage doubling network and the switched capacitor network on the output side to improve the output voltage, and through the organic combination of the interleaved coupled inductor structure and the voltage doubling network and the switched capacitor network, a high boost ratio can be obtained under the condition of a lower duty cycle and a smaller coupled inductor winding ratio, the problems of increased leakage inductance, high magnetic core loss and excessive device stress caused by the dependence of traditional topologies on an extremely high duty cycle or an ultra-large winding ratio are avoided, the boost capability under a wide input voltage range is significantly improved, and the bipolar self-balancing interleaved coupled inductor high-gain converter is suitable for the scene of supplying power from low-voltage new energy such as photovoltaic energy and energy storage to a high-voltage direct-current bus.

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.