8results 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.

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 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 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 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.