26 results about "Circuit restoration" patented technology

The invention discloses an automatic control method of a molded case circuit breaker operating mechanism, and particularly relates to the technical field of molded case circuit breakers. Electrical parameters are monitored in real time and transmitted to a control system, and comparative analysis is performed based on a preset threshold value and a fault model, so that faults are detected in time and a control instruction is generated, and the system can identify and sort multiple fault scenes, automatically execute switching-on or switching-off actions and ensure the reliability and stability of a power system; a judgment mechanism based on the circuit recovery condition is introduced, after the circuit is disconnected, whether recovery operation is carried out or not is reasonably judged according to the state of the circuit breaker and the recovery condition of the power system, the self-recovery capacity and the fault diagnosis capacity of the power system are effectively improved, the method can adapt to the influences of high loads, complex environments and power grid fluctuation, and the reliability of the power system is improved. And the reliability and the precision of an automatic control system are obviously improved.

The utility model discloses a power converter, which relates to the field of power conversion, and is characterized in that a rectifying circuit is connected with an alternating current power supply, converts the alternating current power supply into a direct current power supply and outputs the direct current power supply to two ends of a first capacitor, and a primary winding of a transformer, a power switch tube and an output protection module are connected in series; the power switch tube converts direct-current power at the two ends of the first capacitor into alternating-current power again to facilitate voltage level adjustment of the transformer, the output protection module is connected in series in the loop, and when the power switch tube fails and is damaged, current in the loop is increased rapidly, and the output protection module is disconnected. When the current in the loop is greater than a preset value, the output protection module disconnects the circuit between the series loop and the first capacitor quickly to prevent the direct-current power stored in the first capacitor from being continuously output to the series loop, so that the large current at the short circuit moment is avoided, the fault is controlled within the minimum range, and the service life is prolonged. The huge risk of circuit explosion and fire is avoided, subsequent maintenance and circuit recovery are facilitated, and the safety and reliability of the whole power converter are improved.

The present invention relates to an ADC circuit with rising and falling threshold over-temperature protection. The circuit includes a bias module, a sampling voltage generation module, a reference voltage generation module, a comparator, a Schmitt circuit for generating rising and falling thresholds, and an over-temperature protection circuit. The over-temperature protection circuit includes a trigger MOS transistor M37 connected to the ADC circuit and a cascade driver connected to both the Schmitt circuit and the trigger MOS transistor M37. When the circuit temperature exceeds the rising threshold or falls below the falling threshold, the cascade driver controls the trigger MOS transistor M37 to change its conduction state to implement over-temperature protection for the ADC circuit. When the circuit temperature returns to a normal range, the cascade driver controls the trigger MOS transistor M37 to return to its initial conduction state or a predetermined conduction operating state, allowing the ADC circuit to resume normal operation. The present invention can effectively prevent damage to electronic components in the ADC circuit due to overheating, thereby improving the reliability and service life of the ADC circuit.

The invention discloses a power equipment control method and system suitable for an unmanned scene, and the method comprises the steps: receiving a charging triggering instruction through an electricity collection terminal, transmitting a power supply recovery signal to a load switch through a communication bus based on the charging triggering instruction, and controlling the load switch to be closed so as to recover the power supply of a user side circuit; the charging control parameters are sent to the intelligent socket in a power line carrier communication mode, and the intelligent socket is controlled to charge the power equipment according to the control parameters; in the charging process, state information related to the power equipment is monitored in real time through the power utilization acquisition terminal, the state information is used for identifying occurrence of a preset type of event, and when the preset type of event is monitored, a corresponding preset control process is dynamically switched according to the type of the event. Continuously executing charging operation or executing safety protection action according to a preset control flow; and after charging is completed, the load switch is controlled to be switched off through the electricity utilization acquisition terminal, so that the user side circuit is recovered to a power-off state.

The utility model discloses an overload protection device for a photovoltaic energy storage circuit, and relates to the technical field of overload protection in a power electronic technology and a photovoltaic power generation system, the overload protection device comprises a mounting shell, a main control unit, a current sensor, a driving circuit and a combination switch module, and a shell door is hinged to one side of the mounting shell. The current sensor continuously collects current data in a circuit and transmits the current data to the main control unit, and the main control unit analyzes the received current data, calculates a current actual current value, compares the current actual current value with a preset safety threshold value, and controls each silicon controlled rectifier in the composite switch module to be switched on or switched off. And in the recovery stage, the main control unit continuously monitors the current condition, closes the circuit again after confirming that no abnormity exists, and recovers normal work, so that the response speed of the overload protection device is improved, the circuit can be rapidly cut off when overload occurs, and equipment damage and potential safety hazards are avoided.

The utility model relates to the technical field of electronic components, and provides a patch type rectifier bridge for a new energy automobile, which comprises a shell and four diodes, the four diodes are connected to form a bridge type circuit structure, anodes of two diodes are connected together to form an anode output end, and cathodes of the other two diodes are connected together to form a cathode output end; the over-current protection circuit further comprises an over-current protection structure, the over-current protection structure comprises a fuse connected to the input end of the rectifier bridge in series, and the over-current protection structure adopts the mode that the fuse is combined with a self-recovery fuse. The fuse is fused when the current in the circuit exceeds a rated value, the circuit is cut off rapidly, and the rectifier bridge and a post-stage circuit are protected from being damaged by overcurrent. The resettable fuse is rapidly heated when an overcurrent fault occurs in the circuit, and is automatically cooled and recovered to a low-resistance state after the fault is eliminated, so that the circuit recovers normal work, and the resettable fuse can avoid the trouble of frequently replacing the fuse.

The utility model provides a switching circuit, which comprises a short-circuit protection circuit and at least one switching element, the short-circuit protection circuit is connected between a power supply positive electrode and the at least one switching element, and the protection circuit is characterized by comprising a protection switching circuit which is connected with a power supply end of the switching element and the power supply positive electrode; and a peripheral circuit which is connected to the protection switching circuit and the positive electrode of the power supply and generates an operating voltage for turning on the protection switching circuit, and when the protection switching circuit is turned on, the positive electrode of the power supply applies a voltage to the power supply end of the switching element through the protection switching circuit. Therefore, the protection switch circuit can be switched between connection and disconnection, short-circuit protection can be carried out in a non-one-time mode, the circuit can continue to be used, cost is saved, system operation efficiency is improved, a peripheral loop generates working voltage enabling the protection switch circuit to be connected through the positive electrode of the power source, the recovery speed of the protection switch circuit can be increased, and the service life of the protection switch circuit is prolonged. And the circuit structure is simplified.

A first device communicating with a second device through a high-speed serial interface includes an interface controller configured to recover data received via the high-speed serial interface and a component configured to perform a selected operation based on the recovered data, the interface controller including a recovered clock domain circuit configured to operate based on a recovered clock corresponding to a data transmission rate of the high-speed serial interface and a local clock domain circuit configured to operate based on a local clock having a frequency adaptively controlled based on a frequency of the recovered clock.

This invention provides a protection circuit for suppressing transient overshoot, comprising a signal processing module, an adjustment module, and a control module connected in sequence. The input terminal of the signal processing module and the first input terminal of the control module are both connected to a first external signal voltage VS1. The first reference terminal of the adjustment module and the second input terminal of the control module are both connected to an internal signal voltage VS2. The signal processing module is configured to output a first voltage V1 to the adjustment module based on the first external signal voltage VS1 when a power circuit fault occurs, thereby reducing the internal signal voltage VS2. The control module is configured to output a control voltage to shut down the power circuit when the first external signal voltage VS1 is higher than a threshold voltage. The control module is further configured to output a corresponding control voltage to the power circuit based on the first external signal voltage VS1 and the internal signal voltage VS2 when the power circuit returns to normal, thereby reducing transient overshoot during the process of the power circuit recovering from a fault state to a normal state.

The embodiment of the invention provides a fault recovery method, electronic equipment, a storage medium and a program product. Relates to the technical field of radio frequency front-end control. The method comprises the steps that a controller obtains the states of a plurality of first buses, each first bus comprises a plurality of devices, each device comprises a circuit for recognizing a recovery signal, and the recovery signal is a clock signal; the controller determines a second bus of the device with the fault in the plurality of first buses based on the states of the plurality of first buses; the controller sends a recovery signal to the plurality of devices on the second bus, the recovery signal is used for indicating the plurality of devices on the second bus to perform recovery operation, and the plurality of devices on the second bus detect the clock signal sent by the controller according to the circuit; and when the clock signal is detected to be a recovery signal, the plurality of devices on the second bus perform recovery operation. And the fault recovery possibility of the device is improved.

The application relates to an anti-single event upset current latching type sensitive amplifier, which comprises a pre-charging circuit, a 4P unit, a 2P2N unit, a bit line input circuit and an enable tube circuit; the pre-charging circuit is used for stabling the output nodes OUT and OUTN to the same high level through a power supply VDD when a pre-charging signal PRE is at a low level before an SRAM performs a read operation; the bit line input circuit and the enable tube circuit are used for adjusting the voltage of the output nodes OUT and OUTN according to the voltage difference of a bit line signal BL and an inverse bit line signal BLN when the SRAM performs the read operation; the 4P unit and the 2P2N unit are used for restoring the circuit to the original state according to redundant nodes S0 and S1 when a single event upset occurs. The output nodes are kept at the high level in the low level state of the pre-charging signal, the slight voltage change is rapidly amplified during the read operation process, and the reliability and the read precision of the circuit can be ensured.

The utility model provides a power equipment protection control system, and belongs to the technical field of circuit protection. The power equipment protection control system comprises a temperature detection module, a high-temperature protection module, a delay module, a reset module and an overcurrent protection module. The temperature detection module is used for detecting the temperature of the power equipment; the output end of the temperature detection module is connected with the input end of the delay module and the first end of the reset module. The control end of the reset module is connected with the output end of the delay module, and the second end of the reset module is connected with the control end of the high-temperature protection module; two ends of the high-temperature protection module are connected in parallel with two ends of power equipment; the input end of the overcurrent protection module is connected with the power equipment in parallel, and the output end of the overcurrent protection module is used for disconnecting a power supply loop of the power equipment. The circuit can solve the problem that power equipment is easily damaged due to immediate reset after the circuit returns to normal.

The invention discloses a front-end circuit based on a CLYC scintillator and a SiPM detector. Comprising a first-stage detection circuit, a second-stage pole zero cancellation circuit, a third-stage in-phase proportion amplification circuit, a fourth-stage in-phase proportion amplification circuit and a fifth-stage Sallen-Key type low-pass filtering amplification circuit which are connected in sequence, wherein the first-stage detection circuit is composed of a CLYC scintillator and an SiPM detector which are connected with each other; a signal forms a multiplied electric signal through the first-stage detection circuit, the second-stage polar zero cancellation circuit recovers a rapid rising edge of a pulse signal, and the third-stage in-phase proportional amplification circuit and the fourth-stage in-phase proportional amplification circuit realize proportional amplification of the signal so as to ensure long-distance transmission of the signal. And the fifth-stage Sallen-Key type low-pass filtering and amplifying circuit is used for filtering the signal so as to reduce the influence of high-frequency noise and outputting a voltage signal. The circuit effectively processes the standard output waveform of the detector, and ensures that the waveform can be transmitted for a long distance.

The invention relates to the technical field of intelligent water meters, in particular to a protection method and device for an intelligent water meter to automatically monitor abnormal currents and electronic equipment, and the method comprises the steps that current working modes are obtained, and the current working modes comprise a large-rated-current working mode and a small-rated-current working mode; the current working state is judged according to the current working mode, if the current working mode is a large-rated-current working mode, the control circuit continues to work, and if the current working mode is a small-rated-current working mode, the power consumption monitoring circuit is started; and if the power consumption monitoring circuit detects abnormal current, the intelligent water meter automatically enters a protection mode and executes corresponding protection measures until the circuit returns to normal. Therefore, the problems that in the prior art, when no network exists or network signals are poor, power consumption is increased or even out of control, so that the service life is short, metering is inaccurate, and economic losses and water disputes are caused are solved.

A control system (100) comprises an influence determination circuit (13) and a control circuit (a CPU (11) and a system control circuit (14)). The influence determination circuit (13) determines whether or not the influence of power restoration of a target circuit (2) that is connected to a power supply (VDD) is permitted at least in an operation of a prescribed circuit (1) that is connected to the power supply (VDD). When the influence determination circuit (13) determines that the influence is not permitted, the control circuit changes operation states of: the prescribed circuit (1); and the target circuit (2) and / or a circuit other than the prescribed circuit (1) connected to the power supply (VDD).

This disclosure provides a six-port isolation error amplifier and isolation power supply, including a detection circuit, a pulse width modulation circuit, an encoding / modulation circuit, a coupling transmission circuit, a decoding / demodulation circuit, a recovery circuit, and an open-drain (OD) gate. The detection circuit detects the input voltage and outputs a detection voltage and a detection current positively correlated with the input current. The pulse width modulation circuit generates a first pulse width modulation signal based on the detection voltage. The encoding / modulation circuit converts the first pulse width modulation signal into a transmission signal. The coupling transmission circuit couples and transmits the transmission signal. The decoding / demodulation circuit receives the transmitted coupled signal and recovers the transmitted coupled signal into a second pulse width modulation signal. The recovery circuit recovers the second pulse width modulation signal into a DC voltage positively correlated with the duty cycle of the second pulse width modulation signal. The OD gate converts the DC voltage into an output current positively correlated with the input current. It can replace the optocoupler in the isolation feedback scenario 1:1.

This invention discloses an automated control method for the operating mechanism of a molded case circuit breaker (MCCB), specifically relating to the field of MCB technology. By monitoring electrical parameters in real time and transmitting them to the control system, and performing comparative analysis based on preset thresholds and fault models, the system can promptly detect faults and generate control commands. The system can identify and prioritize multiple fault scenarios, automatically executing closing or opening actions to ensure the reliability and stability of the power system. Furthermore, this invention introduces a judgment mechanism based on circuit recovery status. After the circuit is disconnected, the system rationally determines whether to perform a recovery operation based on the status of the circuit breaker and the recovery status of the power system, effectively improving the self-recovery capability and fault diagnosis capability of the power system. This method can adapt to the effects of high loads, complex environments, and power grid fluctuations, significantly improving the reliability and accuracy of the automated control system.

The invention relates to a control circuit and a control method of an air conditioning unit, based on the control method of the embodiment of the invention, under the condition that the air conditioning unit is powered off abnormally, an upper computer controls a third relay to be closed, and controls a first end in a first relay and a common end in the first relay to be closed; therefore, the power conversion circuit recovers power supply to the main control circuit. And after the power supply of the main control circuit is recovered, the main control circuit controls the second end of the first relay to be connected with the common end of the first relay, so that the power supply of the air conditioning unit is reestablished. Therefore, the problem that in the prior art, under the condition that the air conditioning unit is abnormal, the PTC resistor heats, and consequently a rear-stage circuit cannot be powered on is solved.

The present invention relates to an over-temperature protection circuit with rising and falling thresholds. The circuit includes a bias module, a sampling voltage generation module, a reference voltage generation module, a comparator, a Schmitt circuit for generating rising and falling thresholds, and an over-temperature protection circuit. The over-temperature protection circuit includes a trigger MOS transistor M37 connected to an ADC circuit and a cascade driver connected to both the Schmitt circuit and the trigger MOS transistor M37. When the circuit temperature exceeds the rising threshold or falls below the falling threshold, the cascade driver controls the trigger MOS transistor M37 to change its conduction state, thereby implementing over-temperature protection for the ADC circuit. When the circuit temperature returns to a normal range, the cascade driver controls the trigger MOS transistor M37 to return to its initial conduction state or a predetermined conduction operating state, thereby resuming normal operation of the ADC circuit. The present invention can effectively prevent damage to electronic components in the ADC circuit due to overheating, thereby improving the reliability and service life of the ADC circuit.

The invention relates to a current latch type sense amplifier capable of resisting single event upset. The current latch type sense amplifier comprises a pre-charging circuit, a 4P unit, a 2P2N unit, a bit line input circuit and an enabling tube circuit, the pre-charging circuit is used for stabilizing an output node OUT and an output node OUTN at the same high level through a power supply VDD when a pre-charging signal PRE is at a low level before reading operation of the SRAM; the bit line input circuit and the enabling tube circuit are used for adjusting voltages of output nodes OUT and OUTN according to a voltage difference between a bit line signal BL and an anti-bit line signal BLN when the SRAM performs read operation; and the 4P unit and the 2P2N unit are used for recovering the circuit to the original state according to the redundant nodes S0 and S1 when single event upset occurs. When the pre-charging signal is in a low-level state, the output node is kept at a high level, and in the reading operation process, tiny voltage change is rapidly amplified, and the reliability and the reading precision of the circuit can be ensured.

The invention provides a quick-starting band-gap reference source circuit and a starting method. The circuit comprises a band-gap reference core circuit and a starting circuit. The band-gap reference core circuit is used for generating reference voltage. The starting circuit comprises a starting state detection circuit and a current enhancement circuit. The starting state detection circuit is configured to automatically judge whether the circuit is in a starting stage or a stable working stage according to the working state in the band-gap reference core circuit. The current enhancement circuit responds to a judgment result of the starting state detection circuit and automatically increases bias current in the band-gap reference core circuit in a starting stage so as to accelerate establishment of reference voltage; and after the circuit enters a stable working stage, increasing of the bias current is automatically stopped, so that the circuit is recovered to a normal low-power-consumption mode. According to the reference source circuit, the contradiction between low power consumption and quick start in the prior art is solved, and the start time of the reference source circuit can be effectively shortened on the premise that steady-state power consumption is not increased.

The invention provides a TPCM authentication trusted starting method and device based on an X86 platform and a storage medium. The method comprises the following steps of: controlling a switchable interface circuit to be in a first connection state for connecting a flash memory with an SPI (Serial Peripheral Interface) of a TPCM (Transport Pulse Code Modulation) during first power-on; controlling the nuclear power supply circuit to supply power to the central processing unit, and controlling the switchable interface circuit to be switched to a second communication state in which the flash memory is communicated with the SPI interface of the central processing unit; when the system is restarted, the switchable interface circuit is controlled to be kept in a second connection state; in the suspended state, the trigger verification circuit outputs a reset trigger signal to the TPCM again, and controls the switchable interface circuit to be switched to the first connection state; and when the restart verification result represents that the start firmware passes the verification, controlling the switchable interface circuit to recover to the second connection state so as to complete the start control of the system restart process. According to the method, a TPCM authentication starting mechanism can be introduced into an X86 platform, the integrity of a starting chain is improved, and the safety and reliability of the first power-on and restarting process are enhanced.

The invention discloses a CAN sleep wake-up circuit and device, and relates to the technical field of CAN wake-up circuits, the wake-up circuit comprises a first switch circuit, a second switch circuit and a third switch circuit, the first switch circuit is used for being connected with a CAN chip, the second switch circuit is used for being connected with a controller, and the third switch circuit is used for being connected with a CAN chip. The third switching circuit is connected with a power supply and a load, the third switching circuit is also connected with the first switching circuit and the second switching circuit, when the CAN chip sends a wake-up signal, the first switching circuit is switched on, so that the third switching circuit is switched on, the controller controls the second switching circuit to be switched on, and the third switching circuit is switched on. The first switch circuit is connected with the third switch circuit through a first signal, so that the third switch circuit is maintained to be connected, a wake-up signal is sent out through a CAN chip to enable the first switch circuit and the third switch circuit to be connected, a power supply supplies power to the load through the third switch circuit to wake up the CAN communication circuit in the load, and then the load and the CAN communication circuit in the load are restored to a normal working mode.

The application discloses a redundant pruning method for solving the multivalued problem of a bit stream mapping unit of an FPGA device, and relates to the field of hardware security. First, the FPGA bit stream file is parsed, the configuration option set is extracted, and the configuration option set is subjected to module division. Second, the circuit model of each site module is restored according to the logic unit configuration resource, and the network connection relationship between the modules is established. Third, the redundant modules caused by the unit multivalued problem are finely pruned based on the connection between the modules. Specifically, the upstream and downstream connection conditions of the modules and the overall connection relationship of the cascaded modules are judged, and it is ensured that only necessary functional modules are reserved. Finally, the pruned module set and the network connection are output, and the optimized parsing of the FPGA bit stream file is realized. The method effectively solves the redundancy caused by the unit multivalued problem in the FPGA bit stream file parsing process, improves the accuracy and efficiency of circuit restoration, and provides a new technical means for FPGA reverse engineering.

The utility model provides a switching device driving circuit and electronic equipment, the switching device driving circuit comprises a control circuit and a protection circuit, the control circuit is used for receiving a control signal, switching on a current output path in response to the received control signal being a high level, and not switching on the current output path in response to the received control signal being a low level; the protection circuit is connected to the current output path in series, the input end of the protection circuit is connected with the power supply, the output end of the protection circuit is connected with the control end of the switching device, and the protection circuit cuts off the current output path when responding to current on the current output path exceeding preset current. The protection circuit restores the current output path in response to the current on the current output path not exceeding the preset current and the control signal is at a high level. According to the scheme, when the current is recovered to be within the preset range and the control signal is at the high level, the protection circuit can conduct the current output path again, so that the circuit is recovered to be in a normal working state.

The invention discloses a redundancy trimming method for solving the multi-valued problem of a bit stream mapping unit of an FPGA (Field Programmable Gate Array) device, and relates to the field of hardware security. The method comprises the following steps: firstly, analyzing an FPGA bit stream file, extracting a configuration option set in the FPGA bit stream file, and performing module division on the FPGA bit stream file; secondly, restoring a circuit model of each site module according to the logic unit configuration resources, and establishing a network connection relationship between the modules; thirdly, performing refined trimming on redundant modules caused by the unit multi-valued problem based on the connection condition between the modules; specifically, only necessary functional modules are kept by judging the upstream and downstream connection conditions of the modules and the overall connection relation of the cascade modules. And finally, outputting the trimmed module set and network connection to realize optimized analysis of the FPGA bit stream file. According to the method, redundancy caused by the unit multi-valued problem in the FPGA bit stream file analysis process is effectively solved, the accuracy and efficiency of circuit restoration are improved, and a new technical means is provided for FPGA reverse engineering.