21results about How to "Implement overcurrent protection" patented technology

The utility model discloses an overcurrent protection circuit and system, and relates to the technical field of power electronics, a current detection device can collect current of a circuit to be detected and convert the current into linearly dependent voltage, an operational amplifier circuit can amplify the voltage, and the operational amplifier circuit is connected with the current detection device. When the amplified voltage value is larger than a first reference voltage value provided by the first reference module, the positive comparison circuit outputs a preset level signal of a first preset time, and when the amplified voltage value is smaller than a second reference voltage value provided by the second reference module, the negative comparison circuit outputs a preset level signal of a second preset time. Therefore, the controller has enough time to receive the preset level signal and carries out blocking driving after receiving the preset level signal, so that the current value of the circuit side to be detected is reduced, and over-current protection is accurately realized.

The invention relates to the technical field of power supply, in particular to a battery discharge management method and system, a computer readable storage medium and an inverse control integrated inverter. The battery information of the energy storage battery, the photovoltaic discharge power of the photovoltaic power generation module and the load power required by the load are acquired in real time, and the preset discharge current is set according to the specification of the energy storage battery, so that the battery discharge power of the energy storage battery is set according to the preset discharge current and the battery information; therefore, the current allowed by the specification of the energy storage battery is not exceeded when the energy storage battery is discharged, and the maximum discharge power in the discharge process of the energy storage battery is set, so that the overcurrent protection of the energy storage battery is realized. Besides, the discharge strategy of the energy storage battery, the photovoltaic power generation module and the commercial power can be obtained and executed through the battery discharge power, the photovoltaic discharge power and the load power, so that the maximum discharge power of the energy storage battery can be realized in the discharge process on the premise of overcurrent protection, and the energy of the energy storage battery can be fully utilized.

This utility model discloses a low-voltage battery system for electric vehicles using sodium batteries, comprising a battery management module, several sodium-ion batteries connected in series to form a sodium-ion battery pack, several temperature sensors, a shunt, a discharge switch composed of several MOSFETs, a total positive output terminal, a total negative output terminal, and a one-button start switch. The system's output voltage matches the original vehicle's lead-acid battery, allowing for direct replacement without modifying the vehicle's electrical circuit, demonstrating strong adaptability. After undervoltage lockout, the system can be restarted by pressing and holding the one-button start switch, avoiding the cumbersome operation of external jump-starting and improving user experience. Temperature sensors monitor cell temperature in real time, preventing the impact of high / low temperatures on battery performance. The shunt, in conjunction with the total current detection unit, provides overcurrent protection, extending system lifespan. Sodium-ion batteries eliminate the need for complex protection for individual cells, reducing costs by more than 30% compared to lithium-ion battery systems, making them easier to scale up.

The utility model discloses an electric power cabinet power supply system, which comprises an explosion-proof electric power cabinet body, a protection box is fixedly arranged in an inner cavity of the explosion-proof electric power cabinet body, a circuit board is fixedly arranged on the rear side of an inner cavity of the protection box, and an overcurrent protection assembly is arranged on the surface of the circuit board. An electricity control assembly is arranged at the front end of the right side of an inner cavity of the anti-explosion power cabinet body and comprises a fixing shell fixedly connected to the right side of the anti-explosion power cabinet body, and a point contact switch is fixedly installed on the right side of an inner cavity of the fixing shell. According to the utility model, the explosion-proof electric power cabinet body and the cabinet door are used in cooperation, a relatively closed operation place is provided for electrical apparatus elements, the overcurrent protection assembly is used in cooperation, the main circuit of the explosion-proof electric power cabinet body can be protected in an overcurrent manner, and the power control assembly is used in cooperation, so that the explosion-proof electric power cabinet can be protected. A safe power supply mode of switching on power off and switching off power supply can be achieved, and the purposes of preventing current overload and effectively preventing safety accidents can be achieved.

This utility model belongs to the field of converter technology and discloses a three-phase interleaved half-bridge LLC converter circuit, including a current sampling section. One side of the current sampling section is connected to the half-bridge LLC circuit, and the other side is connected to pins 1 and 3 of rectifier bridge D13. Pin 2 of rectifier bridge D13 is connected to one end of resistor R1 and pin 5 of comparator U2. Pin 4 of rectifier bridge D13 is connected to the other end of resistor R1, pin 2 of comparator U2 and one end of resistor R2. Pin 3 of comparator U2 is connected to port V_REF. The other end of resistor R2 is connected to one end of capacitor C6 and port 1 of controller U3. The other end of capacitor C6 is connected to port GND. The beneficial effects of this utility model are: fewer circuit components, simple structure, ability to achieve hardware overcurrent protection and software overcurrent protection, and significant reduction of the risk of instantaneous high current damage to power transistors.

This application relates to the technical field of circuit transformers, and in particular to a BUCK circuit based on the UC3843, comprising: a control module for receiving a transformer signal and generating a switch on / off signal based on the transformer signal; a drive module connected to the control module to receive the switch on / off signal and isolate and transmit the switch on / off signal to generate an isolation on / off signal; and a voltage adjustment module for receiving the isolation on / off signal and adjusting the voltage output according to the isolation on / off signal. This application converts a higher DC input voltage to a lower DC output voltage. The circuit achieves the same function as a transformer through a step-down method, reducing costs and improving space utilization.

The application relates to the technical field of power batteries, and provides a pole, a battery cover plate assembly and a battery. The pole comprises a pole body and a pole bottom plate. The pole bottom plate comprises a bottom plate main body section fixedly connected with one end of the pole body, a pole lug connecting section connected with a pole lug of a pole group, and a fuse section connected with the bottom plate main body section and the pole lug connecting section. The pole lug connecting section is arranged on at least one side of the bottom plate main body section along the length direction of the pole bottom plate, and the pole lug connecting section is connected with the bottom plate main body section through the fuse section. In the thickness direction of the pole bottom plate, the size A of the pole bottom plate and the size A1 of the fuse section satisfy 50% <= A1 / A <= 1. The pole provided by the application can save the traditional connecting sheet, reduce the number of parts in the battery assembling process, simplify the process steps, improve the production efficiency, and better realize the overcurrent protection of the battery and improve the safety of the battery.

The utility model discloses a kind of MCU power supply control circuit of linear drive device, controller and electric furniture, for realizing the zero power consumption standby of MCU and load wake-up.The technical scheme is: in standby state, MCU is completely powered off, but a DC output port remains electrified.When external load is connected to the DC output port and generates current, a passive detection circuit consisting of sampling unit and detection unit generates trigger signal, the trigger signal turns on a first switching unit, thereby connecting the power supply of MCU, wakes up MCU to perform subsequent tasks.The utility model triggers MCU power-on by passive detection mode, completely solves the standby power consumption problem of equipment, simple structure, response sensitive.

The present application discloses a power supply regulation circuit, a power supply regulation method and an electronic device, wherein the control circuit in the power supply regulation circuit adjusts the signal frequency of the set control signal; the three-phase main power circuit converts the first DC signal into the first AC signal in response to the set control signal, and adjusts the waveform frequency of the first AC signal based on the signal frequency; the three-phase resonant circuit adjusts the first AC signal into a resonant current signal in response to the waveform frequency; the three-phase current sampling circuit obtains the resonant current signal in the three-phase resonant circuit, and converts the resonant current signal into a sampled voltage signal; the voltage comparison circuit compares the sampled voltage signal with the set reference voltage to obtain a comparison output signal; the control circuit sends or stops sending the set control signal to the three-phase main power circuit based on the level state of the comparison output signal. Through the above method, the power supply regulation circuit of the present application can fully and effectively realize overcurrent protection to improve the stability and reliability of power supply.

The invention discloses a high-voltage high-power anti-backflow solid relay, which comprises a main power switch circuit, a current detection circuit, a short-circuit tripping judgment circuit, a tripping locking circuit, an overcurrent delay protection circuit, a tripping state indication circuit and a power switch driving circuit, the current detection circuit is connected with the main power switch circuit and collects current signals of the main power switch circuit. According to the invention, basic functions of a traditional electromechanical contactor can be realized, functions of state monitoring, over-current protection and short-circuit protection are realized, electric load non-arc control, over-current protection and short-circuit protection are realized, the reliability of a system and a product is improved, health management requirements of electric equipment are met, the service life is prolonged, and the cost is reduced. Volume and weight of finished products are reduced.

The embodiment of the utility model discloses an overcurrent protection circuit and an aerosol generating device, and the overcurrent protection circuit comprises a load circuit which comprises a load and a switch branch; the load circuit is provided with a first output end for outputting a first voltage; the voltage comparator is provided with a first input end for receiving the first voltage, a second input end for receiving the reference voltage and a second output end electrically connected with the control end of the switch branch; the voltage comparator is configured to output an enable signal based on the comparison of the reference voltage and the first voltage when the load is over-current, so that the switch branch disconnects the connection between the load and the power supply; the reference voltage source is used for providing reference voltage for the first input end when the load is in an off state; wherein the voltage comparator is further configured to output an enable signal based on the comparison of the reference voltage and the reference voltage, so that the switch branch is maintained in an off state. By means of the mode, overcurrent protection of the load circuit is achieved, and the overcurrent protection is locked.

The utility model relates to a protection circuit and a motor device, the protection circuit comprises a sampling circuit, a comparison circuit and a switching circuit, when the motor is over-current, the sampling circuit samples the working current of the motor and converts the working current into a working voltage, the comparison circuit compares the working voltage with a reference voltage and generates a comparison signal, and the switching circuit outputs the comparison signal. When the switching circuit is in the on state, the switching circuit generates a first control signal, so that the comparison signal controls the switching circuit to be in the on state, and when the switching circuit is in the on state, the switching circuit generates a second control signal, so that the driving circuit generates a corresponding driving turn-off signal according to the second control signal to drive the motor to stop running, and overcurrent protection of the motor is realized. Therefore, the protection circuit can realize over-current protection of the motor, and generates a drive turn-off signal through hardware, thereby reducing time delay, effectively shortening protection time, and performing over-current protection in time, thereby improving the reliability of the motor device.

The utility model belongs to the technical field of power supply circuits, and particularly relates to an overcurrent protection circuit and electronic equipment. The overcurrent protection circuit comprises a gear switching module, a current sampling module and an overcurrent protection module; by setting the preset threshold value, the gear switching module can detect the magnitude of the input voltage, and the overcurrent protection module can change the threshold value of overcurrent protection according to whether the gear switching signal is received or not, so that the overcurrent threshold value is matched with the input voltage, and double-gear overcurrent protection is realized.

The utility model discloses an outdoor WIFI single plug, which comprises a body plug, at least one power socket is arranged on the surface of the body plug, and the outdoor WIFI single plug is characterized in that a control circuit board is arranged in the body plug, and a power circuit, a control circuit, a WIFI module and a metering chip are arranged on the control circuit board. The power supply circuit converts alternating-current mains supply into direct-current power supply and outputs the direct-current power supply to supply power to the control circuit, the WIFI module and the metering chip, the metering chip detects current and voltage input by the body plug, and the metering chip is electrically connected with the WIFI module. And the WIFI module outputs a signal to the control circuit to control the on-off of a circuit between the body plug and the power socket. The outdoor WIFI single plug realizes over-current protection, and when the current is detected to be greater than a protection value, an RL signal is automatically closed, so that the socket is automatically disconnected.

The invention belongs to the technical field of high-voltage frequency converter current sampling, and particularly relates to a high-voltage frequency converter sampling circuit adopting a Hall sensor. Comprising a Hall sensor, a sampling follower circuit, an isolation amplification circuit, a composite follower circuit, a protection comparison circuit and a CPU digital signal processing chip. The high-voltage frequency converter, the Hall sensor, the sampling follower circuit, the isolation amplification circuit, the composite follower circuit and the CPU digital signal processing chip are connected in sequence, the composite follower circuit is connected with the protection comparison circuit, and the protection comparison circuit is connected with the CPU digital signal processing chip. The invention has the advantages of high detection precision, simple circuit structure, high device integration effect and low cost.

The present invention provides a regional self-healing method for a power distribution system, which relates to the technical field of power distribution system control, and includes: first, each switch obtains the network topology state of the power distribution system, and configures its own current positive direction according to the network topology state; then each switch performs real-time current detection, and when the current detection result indicates that it has an overcurrent alarm, generates an overcurrent alarm signal containing the overcurrent direction and sends it to each switch that has an adjacent relationship with itself; then each switch performs a tripping action according to its own category information, the overcurrent alarm signal generated by itself, and the overcurrent alarm signal sent by each switch that has an adjacent relationship with itself to perform overcurrent protection in the fault area; finally, each switch that performs the tripping action detects and determines in real time whether the power distribution state of the fault area meets the preset closing condition: if so, performs a reclosing action to realize regional self-healing of the fault area. The beneficial effect is to realize simple and efficient regional self-healing of the power distribution system.

The invention discloses an alternating-current quantity bilateral protection circuit and method based on a single power supply and a battery pack. According to the circuit, two comparison circuits are arranged, a positive half-cycle voltage is compared with a positive half-cycle reference voltage through a first comparison circuit, a negative half-cycle voltage is compared with a negative half-cycle reference voltage through a second comparison circuit, and meanwhile, an external protection signal is connected, so that overcurrent protection of the inverter is realized. According to the method, alternating-current quantity voltage is raised by half of preset reference voltage, negative voltage is converted into positive voltage, and comparison of negative half-cycle voltage is achieved in combination with an inverter circuit. By combining the circuit and the method, the bilateral protection of the alternating current quantity of the inverter can be realized only by a single power supply.

This application discloses an overcurrent protection circuit for multiple parallel loads. The circuit includes multiple target circuits, each including: a switch control module with its first terminal connected to the power supply, its second terminal connected to the input terminal of a voltage detection module, and its third terminal connected to the output terminal of the detection module; the output terminal of the voltage detection module is connected to one input terminal of the detection module; another input terminal of the detection module is connected to a reference voltage source; the voltage detection module converts the load current into a detected voltage and outputs it; the detection module compares the detected voltage with the reference voltage source voltage and outputs a load normal / fault signal; the switch control module disconnects the power supply from the load in the voltage detection module based on the load fault signal, thereby achieving overcurrent protection. This disclosure solves the technical problem in the prior art where overcurrent protection cannot adapt to different loads, achieving overcurrent protection for the power supply bus in multi-parallel load scenarios and improving adaptability to different loads.

The invention discloses a ground offset test circuit, method and device, and the circuit comprises a single-chip microcomputer module which is used for controlling the operation of the circuit, including generating a control signal, adjusting the output of a voltage generation module, and controlling a switching circuit; the first voltage generation circuit is a Us end 1V voltage generation circuit, comprises an operational amplifier U1, resistors R1 and R2 and a capacitor C1, and is used for generating + 1V offset voltage and applying the + 1V offset voltage between the Us positive end and the AGND; and the second voltage generation circuit, namely a GND end 1V voltage generation circuit, comprises an operational amplifier U2 and resistors R3, R4 and R7, and is used for generating-1V offset voltage and applying the-1V offset voltage between the GND end and the AGND. According to the invention, by designing the independent Us end 1V voltage generation circuit and GND end 1V voltage generation circuit, accurate + 1V and-1V offset voltages are respectively generated, and the strict requirements of the ground offset test on positive and negative offset can be met. Compared with the prior art, the circuit provided by the invention can more accurately adjust the offset voltage, and ensures the stability of signal reference in various test scenes.

The utility model discloses an over-current protection circuit and communication equipment, and relates to the technical field of over-current protection circuits, and the over-current protection circuit comprises a switching circuit, a detection circuit, a comparison circuit and a reference voltage circuit. The switching circuit is arranged between the first connecting end and the second connecting end; the detection circuit is arranged between the switching circuit and the first connecting end and is used for converting working current flowing through the switching circuit into detection voltage; the comparison circuit is connected with the detection circuit and the switching circuit and is used for comparing detection voltage with reference voltage and controlling the switching circuit to be switched on or switched off according to a comparison result; the reference voltage circuit is connected with the comparison circuit and is used for setting different reference voltages according to different current thresholds and outputting the reference voltages to the comparison circuit. The overcurrent protection circuit provided by the embodiment of the utility model can dynamically adjust and turn off the current threshold of the main loop, dynamically adapt to different working states of the load, and realize overcurrent protection of the main loop.

The present invention discloses a power tube overcurrent protection circuit, comprising an overcurrent detection circuit, a timing control circuit and an enabling control circuit, wherein the overcurrent detection circuit is used to detect whether a controlled power tube has overcurrent; the timing control circuit and the enabling control circuit jointly control the controlled power tube. The present invention can protect the controlled power tube by shutting down the controlled power tube when an overcurrent occurs in the controlled power tube used to control whether a load works or not.