5results about How to "High voltage accuracy" patented technology

The invention discloses a distributed adaptive fault-tolerant control method for a direct-current micro-grid, and the method comprises the steps: designing a distributed adaptive fault compensator based on an extended state observer, and enabling the distributed adaptive fault compensator to be used for compensating the control input of each distributed power supply under the conditions of actuator failure, bias fault and external interference; based on a distributed consistency protocol and a self-adaptive fault compensator, a distributed secondary comprehensive performance optimization adjustment mechanism is provided, and the fault-tolerant capability, the voltage quality and the current sharing precision of the direct-current micro-grid system under the actuator fault are improved; and a Lyapunov stability proof of system convergence based on a distributed adaptive fault-tolerant control method is given. According to the method, multiple types of actuator faults are considered, so that the method is more general; upper bound or lower bound information of any fault is not needed, the difficulty of parameter configuration of the controller can be effectively reduced, and the method is more universal and practical; the distributed power supply is completely distributed, no global information is needed, only the information of the local and adjacent distributed power supplies is utilized, and the communication cost is reduced.

The utility model discloses a passive adjustable voltage clamping circuit with a temperature protection function, which comprises an input positive end IN +, an input negative end IN-, a diode D1, a diode D2, a diode D3, a triode Q1, a field effect transistor Q2, a triode Q3, a controllable precise voltage stabilizing source N1, a temperature sensor RT1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7 and a slide rheostat R8, the input positive end IN + and the input negative end IN-serve as input power sources, the clamping circuit works passively and can bear very high power, and the bearing power depends on the peak power of the field efficiency tube; the clamping voltage is adjustable, the voltage precision is high, the error is controlled below 1%, the field effect transistor Q2 has an over-temperature protection function, the circuit is prevented from being damaged due to thermal breakdown when external high voltage lasts for a long time, the circuit is simple, the circuit is composed of discrete components, the cost is low, implementation is easy, and the cost performance is high.

This application provides a constant voltage control circuit and electronic device, relating to the field of electronic power. The constant voltage control circuit includes a sampling circuit, a driving circuit, a signal output circuit, and a voltage feedback circuit. The driving circuit receives a sampled electrical signal output from the sampling circuit and outputs a driving signal based on the magnitude relationship between the sampled electrical signal and a reference electrical signal. The signal output circuit is connected to the sampling circuit and the driving circuit, and outputs a load voltage signal based on the sampled electrical signal and the driving signal. The voltage feedback circuit generates a voltage feedback signal based on the load voltage signal. The voltage feedback signal adjusts the reference electrical signal from a first reference voltage to a second reference voltage, so that the load voltage signal output by the signal output circuit is within a preset voltage range. The embodiments of this application aim to improve the voltage accuracy of the power module output voltage, reduce the cost of the power module, and improve the stability of the power module.

The application discloses a voltage division offset compensation control circuit and a voltage division offset compensation method. The voltage division offset compensation control circuit comprises: a voltage stabilizing circuit, which is used for sampling an output voltage VO to form a feedback voltage signal, comparing the feedback voltage signal with a reference voltage VREF, and generating an adjustment control signal to adjust the output voltage VO. A compensation circuit is connected with a feedback node of the voltage stabilizing circuit, used for generating a compensation current IX based on the change of the output voltage VO, and injecting the compensation current IX into the feedback node of the voltage stabilizing circuit to offset the voltage division offset caused by the change of the output voltage VO, so that the feedback signal maintains a constant voltage division ratio under different output voltages. The application can eliminate the resistance voltage division error caused by the change of the output voltage in the voltage stabilizing circuit, and ensure the high-precision output of the voltage stabilizing circuit.

The present invention discloses a hybrid power system battery untraceable Kalman SOC estimation method, the steps are as follows: establish an equivalent circuit model based on fractional order theory; conduct capacity test of lithium iron phosphate battery of hybrid UAV under various working conditions; conduct open circuit voltage hysteresis characteristic test of lithium iron phosphate battery and establish a simplified open circuit voltage hysteresis model; conduct parameter identification test and use optimization algorithm for parameter identification; fractional order untraceable Kalman filter SOC estimation. The present invention can better simulate the battery terminal voltage and improve the accuracy of SOC estimation under the condition of using fewer parameters and simpler hysteresis model.