1956 results about "Circuit protection" patented technology

The invention discloses a 5G base station power supply state intelligent monitoring system and method, and belongs to the technical field of intelligent monitoring. According to the system, operation parameters of a 5G base station power supply are acquired in real time through the data acquisition module, and after the operation parameters are processed by the signal conditioning and conversion module, the master control processing unit analyzes digital signals in real time, detects abnormal states and generates alarm information. The communication module is responsible for data transmission and instruction receiving, and the power management and safety protection module provides overvoltage, undervoltage, overcurrent and short circuit protection and triggers emergency measures. The artificial intelligence analysis module performs fault prediction and performance optimization based on historical data and real-time data, and the remote monitoring terminal realizes data visual monitoring and management. According to the invention, the real-time performance and accuracy of monitoring are improved, unified management of multiple base stations is realized, the operation and maintenance cost is reduced, and stable operation of a 5G communication network is guaranteed.

The invention discloses a power supply circuit, a power supply method, a server, a product and a medium, and relates to the technical field of server power supply, the total power demand of the server is dispersed through the parallel design of multiple power panels, the bus current of a single board connected to a first voltage is reduced to the safe bearing range of an MOS tube, the impact risk is reduced, and the service life of the server is prolonged. The electronic fuse is matched with the single-board power to set an overcurrent protection threshold value, and the short-circuit protection response time is shortened; each board is independently provided with a power supply brick to realize second voltage localization conversion and single board output current reduction, a multi-board output end combined power supply design is combined, a heat source is dispersed to eliminate heat accumulation, the through-current capability is multiplied through a parallel path, and the heat dissipation and electrical design feasibility of the circuit board is improved. The technical problems of MOS tube over-limit, overcurrent protection delay, circuit board heat accumulation and difficult through-flow caused by large current brought by a power supply in a high-power server are solved, and the technical effects of enhancing power supply reliability and optimizing energy efficiency are achieved.

The embodiment of the invention provides a closed-loop control method for power driving and protection, and the method comprises the steps: constructing a voltage feedback type circuit through a high-speed operational amplifier, and forming a closed-loop gain structure through a feedback network of the voltage feedback type circuit; the load current of the output end of the voltage feedback type circuit is monitored in real time, and when the load current exceeds a first set threshold value, a protection mechanism is triggered to turn off the output stage; the power-on surge current is limited through the soft start control circuit; phase information of a load reflection coefficient is obtained, an inductance / capacitance combination of the variable dynamic impedance matching network is selected according to phase information table look-up, inductance / capacitance parameters are switched through a relay, and the transmission standing-wave ratio between the power amplifier and a load is optimized; monitoring the temperature of the radiating fin of the power tube, and dynamically adjusting the resistance value of the feedback network; and performing cooperative control of short-circuit protection, over-temperature protection and surge suppression according to the priority. According to the embodiment of the invention, the performance bottleneck in a load fluctuation scene is broken through.

The invention relates to the technical field of power electronic driving control, in particular to a driving system and method for an ultrasonic air pump, and the system comprises a control signal generation module which is used for generating a control signal; the voltage superposition driving module is coupled to the control signal generation module and is used for superposing and lifting the driving voltage according to the control signal and executing reversing operation, and the reversing operation comprises forward driving and reverse driving; the driving frequency adjusting module is coupled to the control signal generating module and is used for adjusting the driving frequency and speed of the ultrasonic air pump based on the control signal; and the working circuit protection module is coupled to the voltage superposition driving module and is used for setting dead time between forward driving and reverse driving to prevent short circuit. According to the invention, the dependence of the ultrasonic air pump on an independent high-voltage power supply and how to realize high-voltage alternating driving through voltage superposition and avoid the risk of bridge arm direct connection and resonance mismatch under the constraint of a low-voltage power supply are effectively solved.

The invention provides an intelligent fuse, and belongs to the technical field of circuit protection, and the intelligent fuse is characterized in that an upper housing is provided with at least one excitation chamber, the excitation chamber is internally provided with at least one excitation part and at least one impact part, and the excitation part releases high-pressure gas when receiving any one of an external trigger signal and an internal trigger signal; the lower shell is provided with at least one cooling cavity; the current-conducting plate is arranged between the upper shell and the lower shell, and the impact part moves towards the direction where the cooling cavity is located under the thrust action of the high-pressure gas so as to cut off the current-conducting plate; the self-control module is arranged outside the shell and comprises a current detection unit and a processing unit, and the current detection unit is used for detecting a current signal on the conductive plate; the processing unit is used for generating an internal trigger signal according to the current signal. The beneficial effects of the invention are that a dual-trigger mechanism and redundancy design of an internal trigger signal and an external trigger signal are adopted, so that normal action can still be ensured when any signal fails, and the breaking reliability is improved.

The invention relates to the technical field of protection circuits, in particular to a voltage threshold dynamic detection earth leakage protection circuit and a circuit protection board. According to the technical scheme, the device comprises a differential current detection module which is used for collecting current difference signals of a live wire and a zero wire in real time; the dynamic threshold adjusting module is connected with the environment sensor and the processing module, and dynamically sets an electric leakage judgment threshold based on environment parameters and load current spectrum analysis; the time division multiplexing programmable analog front end is used for sequentially executing signal amplification, filtering and analog-to-digital conversion functions through time sequence control; the solid-state electronic switch breaking module responds to the electric leakage signal output by the processing module and realizes circuit breaking; and the self-checking and fault-tolerant module periodically generates analog leakage signals to verify the functional integrity of the system. The method adapts to environmental load change through dynamic threshold adjustment, improves signal processing efficiency through time division multiplexing, guarantees reliability of the system through self-checking fault tolerance, and realizes accurate and rapid leakage protection.

The invention relates to the field of display, and discloses a short-circuit protection circuit, an array substrate, a display device and a short-circuit protection method.The short-circuit protection circuit is used for an OLED device and comprises the steps that an information sensing module obtains the actual working current of the OLED device and real-time parameters related to the working state of the OLED device; the dynamic expectation calculation module calculates the dynamic expectation working current n of the OLED device according to the real-time parameters and a preset OLED electrical characteristic model; the decision module synthesizes the actual current, the expected current and the current change rate / fluctuation amplitude to generate a risk judgment signal; and the response control module executes protection operation according to the judgment signal. According to the OLED short-circuit protection method, the accuracy, the sensitivity and the intelligent management level of OLED short-circuit protection are remarkably improved through the technology of dynamically calculating the expected current and carrying out decision making and parameter self-adaptive adjustment by fusing the actual current time sequence characteristics.

A system includes a circuit protection device (CPD) having an input coupled to an aircraft power generator and an output coupled to an aircraft electrical load. A shorting switch is coupled to the input of the CPD. The shorting switch, when closed, provides a fault current path that returns to the aircraft power generator and avoids passing through the CPD and the aircraft electrical load. A controller, based upon the voltage measurements from one or more voltage sensors and current measurements from at least one current sensor selectively opens and closes one or more of the CPD and the shorting switch.

The invention discloses a signal transmission circuit and system of an electronic mutual inductor and a working method, and belongs to the field of electric power protection and measurement and control. A voltage signal in the same proportion as the primary current signal is output to the voltage-current conversion circuit, and the voltage-current conversion circuit converts the voltage signal into a current signal I1 and outputs the current signal I1 to the constant-current voltage stabilizing circuit; the constant-current voltage stabilizing circuit generates a current signal I2, the current signal I2 supplies power to a pre-stage circuit after voltage stabilization, the current signal I2 and a current signal I1 are superposed to output a current signal I3 to the power supply and signal separation circuit, and the protection measurement and control device extracts the current signal I1 in the current signal I3 and converts the current signal I1 into a voltage signal to be collected. A voltage signal suitable for being collected by an AD chip is output through an active differential amplifier, and power is supplied to a constant-current voltage stabilizing circuit. The problems that signal attenuation is obvious and independent power supply is needed during long-distance transmission of the electronic transformer can be solved.

Disclosed are dies carriers for receiving a plurality of circuit protection devices. In some embodiments, a die carrier may include a die body, and a recess in the die body, wherein the recess is operable to receive a die for a circuit protection device. The recess may include a central area defined by a set of sidewalls, and a plurality of corner areas extending from the central area, each of the corner areas defined by a first curved wall, a second curved wall connected to the first curved wall, and a third curved wall connected with the second curved wall, wherein a first center of curvature of the first curved wall is in a different location than a second center of curvature of the second curved wall.

Disclosed is a device for detecting and protecting a short circuit of a switch. A short-circuit protection device according to an embodiment of the present invention includes a voltage measurement unit configured to measure an output voltage of a switch and output the output voltage as a measured voltage, a comparison unit configured to compare the measured voltage with a specified reference voltage, and a connection unit that is connected between the voltage measurement unit and the comparison unit and in case that the switch is turned off, the connection unit is configured to connect an output terminal of the voltage measurement unit to a first ground.

The invention provides a combined full-range controllable protection device, which belongs to the technical field of circuit protection and comprises a trigger body, a breaker and a fuse. The trigger body and the breaker are connected in series, and the trigger body and the breaker which are connected in series are connected in parallel with the fuse; when the circuit is abnormal, the trigger body is fused to carry out primary protection on the circuit, the fused trigger body also generates an electric signal and transmits the electric signal to the breaker, the breaker cuts off the circuit to carry out secondary protection on the circuit, current flowing through the trigger body and the breaker is merged into a branch where the fuse is located, and the fuse is fused to form third-level protection on the circuit; therefore, multi-stage protection is realized through the trigger body, the breaker and the fuse, and the time sequence cooperation of multi-stage protection actions not only avoids misoperation, but also can provide redundancy protection when a serious fault occurs, so that quick response and reliable cut-off when the circuit is abnormal are realized on the basis of keeping low loss when the circuit is normal, and the circuit breaker can be suitable for high-voltage and large-current breaking.

The invention relates to a current transformer with an open circuit protection function and a protection method thereof, and belongs to the technical field of transformers, the current transformer comprises a transformer body and a protection box arranged at the front end of the transformer body, and the protection box comprises an indication mechanism used for indicating an open circuit fault of the transformer body; the box body is fixedly connected with the mutual inductor body, and a wire outlet groove is formed in the box body and used for secondary wiring; the binding posts are arranged in the box body and are connected with the secondary coil of the mutual inductor body; the protection mechanism is arranged on one side of the binding post; and the alarm mechanism is connected with the protection mechanism and is used for sending open-circuit fault alarm information. According to the device, the binding posts are short-circuited quickly through the protection mechanism, abnormal operation of the transformer caused by open circuit is prevented, continuous operation of a system is ensured, and the reliability and stability of the current transformer are improved.

A self-triggering, bidirectional control electronics component for an electronic switch (50), for the detection and rapid shutdown of currents at a selected threshold value for both current flow directions, includes a threshold switch having a plurality of selectable shutdown threshold values for both current flow directions, the threshold switch coupled to a bidirectional current sensor system (65), arranged in the electronic switch, based on sensing of sensors on an input side of the threshold switch; and a high-speed de-energizing circuit (53) on an output side of the threshold switch including a high non-load circuit voltage for rapid removal of current from a magnetic drive coil (45), the high-speed de-energizing circuit being configured to rapidly remove the current from the magnetic drive coil when the bidirectional current sensor system senses a current greater than or equal to the selected threshold value among the plurality of selectable shutdown threshold values.

The embodiment of the invention provides a circuit protection device and a chip, and the device comprises a detection module which is used for detecting whether the voltage of a power supply exceeds a voltage protection threshold, and outputting a low-level signal to a time hysteresis control module when the voltage exceeds the voltage protection threshold; if not, a high-level signal is output to the time hysteresis control module; the time hysteresis control module is used for receiving the low-level signal output by the detection module and controlling an MOS tube in the time hysteresis control module to be turned off; and the control module is used for receiving the high-level signal output by the detection module, timing and controlling the MOS tube to start when the timing time reaches the preset time, so that the problem that the power supply end fluctuates between a protection mode and a normal working mode when the input power supply rapidly fluctuates in the overvoltage and power failure protection circuit in the related technology is solved. In addition, common simple devices are needed for implementation, the cost is low, and the reliability is high.

The invention provides a short circuit protection system and a bidirectional rail alternating current traction system. The short circuit protection system is coupled with a converter, and the converter is coupled with an alternating current bus through a switch; the short-circuit protection system comprises a sampling circuit, a processor and a short-circuit detection device. The sampling circuit is coupled with the direct current end of the converter and is configured to convert a first electric signal of the direct current end into a first voltage signal; the processor is configured to convert a second electric signal of the direct current end into a second voltage signal; the short-circuit detection device is coupled with the output end of the sampling circuit and the output end of the processor, and is configured to perform near-end short-circuit detection based on the first voltage signal and perform far-end short-circuit detection based on the second voltage signal; under the condition that near-end short circuit and / or far-end short circuit occurs, a short-circuit protection enable signal is output; the processor is further configured to respond to the short circuit protection enable signal, block the converter and turn off the switch.

A circuit protection device includes a control circuit, a first N-type transistor, and a first P-type transistor. The first N-type transistor includes a first terminal, a first gate terminal, and a second terminal. The first terminal is configured to receive a first voltage. The first gate terminal is coupled to the control circuit. The first P-type transistor includes a third terminal, a second gate terminal, and a fourth terminal. The third terminal is connected to the second terminal of the first N-type transistor. The second gate terminal is connected to the control circuit.

The utility model discloses a battery monomer, a battery device and a power utilization device. The battery cell includes a housing, an electrode assembly, and a current collector. The shell comprises a wall part; the electrode assembly is accommodated in the housing, and one side, facing the wall part, of the electrode assembly is provided with a first tab. The current collector is arranged between the first tab and the wall part and comprises a first connecting part, a second connecting part and a fusing part; the first connecting part is connected to the wall part and is spaced from the first tab; the second connecting part surrounds the first connecting part, is connected to the first tab and is spaced from the wall part; the fusing part is connected with the first connecting part and the second connecting part, and the fusing part, the first tab and the wall part are arranged at intervals. When internal short circuit occurs in the single battery, the fusing part can be fused under the action of instantaneous high temperature, so that a current loop in the single battery is disconnected, a short-circuit protection effect is achieved, potential safety hazards such as fire and explosion caused by short circuit of the single battery are reduced, and the reliability of the single battery is improved.

The invention relates to the field of circuit protection, in particular to a barrel type excitation fuse which comprises an insulating shell, a conductive barrel, a conductive end cover, an excitation source and a main piston made of insulating materials, the conductive barrel is arranged in the insulating shell in an attached mode, the conductive end cover is fixedly connected to the end of the insulating shell and seals the end of the insulating shell, and the excitation source is arranged in the main piston. The conductive end cover is in conductive contact with the conductive cylinder; the piston is located in the electric conduction barrel, the excitation source penetrates through the insulating shell and the electric conduction barrel, the driving force releasing end of the excitation source is located in the electric conduction barrel, a sealed cavity is formed between the driving force releasing end of the excitation source and the main piston, and when the excitation source acts according to a received trigger signal, driving force is released. And the main piston is driven to move along the conductive cylinder, and the conductive cylinder is disconnected. The cylindrical excitation fuse is compact in structure, small in size and high in impact resistance.

The invention provides a secondary side open circuit monitoring and protection system of a current transformer, which relates to the field of current transformers and comprises an open circuit monitoring module, an open circuit protection execution module, a signal output module and a monitoring terminal, in the real-time mode, when the secondary side loop of the current transformer has an open-circuit fault, the open-circuit monitoring module can quickly and accurately identify that the voltage value of the secondary side is abnormally increased, and once the voltage value exceeds a preset open-circuit voltage threshold value, a control signal is immediately output. The open circuit protection execution module responds to the control signal and automatically switches on a first wiring terminal and a second wiring terminal on the secondary side of the current transformer, so that a secondary side loop is effectively switched on again, potential safety hazards such as high-voltage discharge and rapid heating caused by open circuit are avoided, and an execution action signal is output at the same time. The system is also provided with a signal output module, and the signal output module can respond to an execution action signal and output an open circuit monitoring signal, thereby achieving the real-time monitoring of an open circuit fault.

The utility model discloses a photovoltaic inverter circuit, an inverter and a system, and the photovoltaic inverter circuit comprises a frequency conversion circuit; a multi-path short-circuit protection circuit; the multi-path boost circuit comprises at least two boost modules, each boost module comprises at least two boost circuits, and the output ends of all the boost modules are cascaded and connected with the input end of the frequency conversion circuit; the positive input end of each booster circuit is used for being connected with the positive electrode of a photovoltaic module, the negative input end of each booster circuit is connected with the negative electrode of the photovoltaic module through a short-circuit protection circuit, and the positive electrode connected with the positive input end of each booster circuit and the negative electrode connected with the negative input end of each booster circuit through the short-circuit protection circuit belong to the same photovoltaic module; wherein each short-circuit protection circuit is used for stopping outputting the current of the negative electrode of the connected photovoltaic module to the negative input end of the booster circuit. According to the technical scheme of the utility model, the inverter can be protected when the non-isolated string type photovoltaic inverter is short-circuited to the ground.

The invention discloses a hybrid excitation synchronous motor control method and system, and belongs to the technical field of motor control. The problem that a motor control system can operate at high precision when a position sensor breaks down is mainly solved. The method comprises the following steps that when a position sensor breaks down, a system is switched to an active short circuit protection (ASC) mode, and operation of a motor is controlled by giving instruction values of d-axis current and q-axis current in the mode; then, in an ASC mode, estimating a rotor angle through a voltage equation in a static coordinate system, so as to obtain an electrical angle of a rotor; after the rotor angle estimation is completed, the system is switched from the ASC mode to the vector control mode without the position sensor, and the d-axis voltage and the q-axis voltage are adjusted in the mode, so that the motor can be continuously and accurately controlled and stably run. The invention provides an efficient and safe motor control method, and the safety and reliability of the electric vehicle under the condition of sensor fault are effectively improved.

The invention belongs to the field of power distribution network automation, and discloses a controllable drop-type intelligent fuse and a control method thereof. The controllable drop-type intelligent fuse comprises a measurement and control module which is arranged at the lower part of a fusion tube and is used for measuring the working current of the fuse, the high voltage of a line, the temperature of a fuse wire, the poor contact state of the fusion tube and the drop state of the fusion tube through a sensor and a corresponding measurement circuit, and communicating with a background server through a wireless communication function; the measurement and control module is connected with a configured micro motor and a measurement and control module torque output rotating shaft; the lower contact is provided with a novel tensioning structure which is used for enabling the fuse to be controlled to fall off. On the basis of keeping the function of an original traditional drop-out fuse as a short-circuit protection switch, a measurement control and wireless communication circuit is added; working current, fuse wire temperature and drop state can be measured, drop of the fuse can be controlled automatically or wirelessly and remotely when primary current is larger than a set value, and therefore load overcurrent protection is achieved.

The utility model provides a short-circuit protection circuit for a Type-C interface, and belongs to the technical field of short-circuit protection circuits. Comprising an interface module, an overvoltage and electromagnetic protection circuit and a switching circuit, the interface module, the overvoltage and electromagnetic protection circuit and the switching circuit are connected in series on the same power line and grounding line, and a common circuit and a standby circuit are arranged in the switching circuit and are both connected with the power line. According to the utility model, through the cooperation of the resettable fuse, the double-pole double-throw relay and other elements, the circuit can be rapidly switched so as to ensure that the interface can continue to work normally without maintenance when a short-circuit fault occurs, and through the synergistic effect of the gas discharge tube, the first transient suppression diode, the second transient suppression diode, the electrolytic capacitor and other elements, the short-circuit fault of the interface can be effectively prevented. The problems of overvoltage and electromagnetic interference during short circuit can be effectively relieved.

The utility model relates to the technical field of microphone rods, in particular to an extremely simple circuit, which comprises a voltage microphone V-MIC2, an electret microphone MIC2, a microphone negative terminal MIC1-N, an audio signal port GPIO-12 and an external microphone rod. Wherein the output pin of the voltage microphone V-MIC2 is connected with a resistor R26, the other end of the resistor R26 is connected with a resistor R27, and the other end of the resistor R27 is connected with the output end of the electret microphone MIC2. Through the arrangement of the circuit, the circuit has the advantages of smaller size of an electronic wire, simpler circuit, short-circuit protection function and lower cost, and solves the problems that a 2PIN is used as a microphone working channel, a 1PIN is additionally used for detecting insertion and extraction, and a 1PIN is additionally used for detecting a key, so that the size of a connector is larger, the size of an earphone becomes larger, and the cost is reduced. In the prior art, the number of the electronic wires is changed from two to four, and the electronic wires become thicker, so that the open type Bluetooth telephone traffic earphone cannot realize microphone rod detection and stable conversation effect in a narrow contact area.

The invention discloses a high-side driving circuit, an electronic device, a vehicle and a control method. False triggering of a short-circuit protection mechanism is avoided. The high-side driving circuit comprises a power distribution circuit, a sampling circuit and a fault protection circuit, the power distribution circuit comprises a PMOS transistor and a first resistance circuit; the grid electrode of the PMOS tube is grounded through the first resistance circuit, the drain electrode of the PMOS tube is connected with a load, and the source electrode of the PMOS tube and the input end of the fault protection circuit are connected with a power supply; the output end of the fault protection circuit is connected with the grid electrode of the PMOS tube; the sampling circuit is connected with the drain electrode of the PMOS tube and the ground; the output end of the sampling circuit and the control end of the fault protection circuit are connected to the control unit; the control unit judges whether load short circuit occurs or not according to the sampling voltage, if not, the fault protection circuit is forbidden to output voltage, and if yes, the fault protection circuit is controlled to convert input voltage into target voltage to be output; the PMOS tube is in a variable resistance region when the fault protection circuit has no voltage output, and enters a cut-off region when the PMOS tube outputs a target voltage.

The present disclosure provides a chip package for power modules including at least one semiconductor die; a driver circuit for controlling the at least one semiconductor die; a protective layer formed on a die active surface of the at least one die and a driver active surface of the driver circuit; a metal unit having at least one metal feature; and a molding layer for encapsulating the at least one semiconductor die, the driver circuit, the protective layer and metal unit. The chip package is connected with an external circuit via the at least one metal feature. The present disclosure also provides a method of making the chip packages for power modules.

The invention relates to the technical field of wireless charging, and particularly discloses a wireless electric energy transmission system for multi-split charging of an electric bicycle, which comprises a direct-current voltage source UD, a high-frequency inverter H, an alternating-current switch Si, a transmitting side LCC compensation network, a magnetic coupler, a receiving side LCC compensation network, a rectifier Di, a filter capacitor CFi and a battery load RBi, an alternating current switch Si, the transmitting side LCC compensation network, the magnetic coupler, the receiving side LCC compensation network, the rectifier Di, the filter capacitor CFi and the battery load RBi form an electric energy output channel, the output channel is connected with the high-frequency inverter H, and the output end of the rectifier Di supplies power to the battery load RBi through the filter capacitor CFi. The beneficial effects of the invention are that the system can achieve the automatic switching of a plurality of output channels from a constant current mode to a constant voltage mode under the condition of no detection and no special control circuit, improves the utilization rate of an inverter, saves an open circuit protection circuit, reduces the cost, and is suitable for the one-to-many charging application of electric bicycles of different specifications.

The invention provides a 2M non-framing double-path protection intelligent switching method and system based on redundancy check, and relates to the technical field of communication, and the method comprises the steps: obtaining double-path 2M non-framing code streams, carrying out the alignment processing, generating a check result through employing cyclic redundancy check, carrying out the statistics of error code feature vectors in a sliding time window, and constructing a link quality track. According to the method, the quality degradation early warning signal is extracted, the stage switching strategy is constructed based on the early warning signal, the switching time sequence is determined in combination with the neural network evaluator, link switching is executed, self-adaptive optimization of the switching strategy is achieved, and the intelligence and reliability of link switching are improved.

The invention discloses a range-extended electric aircraft power distribution system and a construction method, and the system constructs a graded power distribution network comprising four stages of protection devices through distributing different windings of a multi-winding motor to different load modules and combining the design of dual power sources of a battery pack and a range extender; by means of the design, independent power supply and fault isolation of winding power are achieved, and it is ensured that power is not completely lost under a single fault; and the dual power sources are backups for each other through an interconnection line, so that the power supply reliability is improved, and the power distribution at different flight stages is optimized. By adopting the technical means of multi-winding motor design and four-stage grading circuit protection, the technical problem that the safety and reliability of a power system of an electric aircraft are insufficient due to a single power supply or a motor fault is solved.