2421 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 invention relates to the technical field of battery testing, in particular to an automatic BMS function testing system and method. The method comprises the following steps: acquiring BMS working parameters; performing short-circuit working condition configuration processing according to the BMS working parameters to generate short-circuit working condition configuration data; performing short-circuit signal simulation based on the short-circuit working condition configuration data to generate short-circuit simulation control signal time sequence data; based on the short-circuit analog control signal time sequence data, a battery pack current short-circuit driving test is carried out through a BMS monitoring system, and BMS monitoring response data is generated; and performing short-circuit current monitoring protection evaluation according to the BMS monitoring response data, and generating BMS function test level data. According to the invention, the automatic test of the BMS short-circuit protection function is realized by intelligently configuring the short-circuit working condition, and the efficiency, accuracy and repeatability of the test are remarkably improved.

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 provides an isolation switch control device with a fault monitoring function, and relates to the technical field of electric power automation, and the device comprises an information collection module which collects the current information in real time during the operation of an opening and closing drive motor, and transmits the current information to a circuit protection module; the circuit protection module performs feature extraction on the current information in a mode of solving a signal waveform envelope line; whether the disconnecting switch has a fault is determined according to the current signal characteristics, and a control instruction is issued to the variable frequency driving module according to a fault result, or a key monitoring prompt is sent to the key monitoring module; the variable frequency driving module controls the operation state of the opening and closing driving motor according to the issued control instruction; and when the key monitoring module receives the key monitoring prompt sent by the circuit protection module, the monitoring frequency of the isolation switch is increased. According to the scheme, the abnormal state of the isolating switch can be monitored in the opening and closing process, so that serious accidents caused by faults of the isolating switch are reduced.

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 utility model relates to the field of circuit protection, in particular to a contactor integrated with an excitation function, and an excitation ignition assembly, a first piston, a first conductive part, an auxiliary contact system, a push rod, a melt, an air passage, a second piston and an elastic part are integrated in the contactor. The melt and the auxiliary contact system are connected in series and then are connected in series between the two static contacts. In a normal working state, the auxiliary contact system is insulated and disconnected, when an overload current, a short-circuit current or an abnormal condition occurs, the ignition assembly is excited to act to drive the first piston and the first conductive piece to move, the first conductive piece enables the auxiliary contact system to be conducted and closed, and the melt is connected into a main loop in a parallel connection mode; and then the second piston and the elastic piece are driven to displace through the air passage, so that the contact system is switched off, the elastic piece generates irreversible deformation, and the first piston and the first conductive piece push the push rod to disconnect the melt. According to the invention, the power loss is low, zero-current cut-off of a main loop can be realized, and the breaking capacity and the breaking reliability are improved.

The present invention relates to the technical field of electric motors, and specifically relates to a three-phase direct-current brushless electric motor, comprising: an electric motor housing, an inner shell, a rotating shaft, a rotor, a stator, a Hall sensor, and a circuit protection device, wherein the inner shell is fixedly mounted at the upper end of the electric motor housing; the rotating shaft is rotatably connected to the electric motor housing; the rotor and the stator are mounted inside the inner shell; and the Hall sensor is rotatably fitted with the rotating shaft. The circuit protection device is located above the rotor; during operation, when the rotating shaft is stuck due to a fault, or when there is an overload, the circuit protection device controls the disconnection of a circuit, thereby realizing the power-off self-locking of the electric motor by means of a load control module, thus avoiding the demagnetization of a rotor permanent magnet at a high temperature caused by heating of the electric motor, and avoiding affecting the rotation speed and normal use of the electric motor.

The utility model discloses a busbar, battery module and battery pack, the busbar includes at least two conducting strip, by setting the first weak part and the second weak part above the thinning area, when the pressure is released, the thinning area will be burst open by the high pressure gas in the single battery, and the impact force will break the first weak part and the second weak part. Therefore, the pressure release valve can efficiently and smoothly release pressure; and when the first weak part and the second weak part are disconnected, the circuit connection between the two adjacent single batteries is also disconnected, so that short-circuit protection is realized, and finally, dual protection of pressure relief protection and battery cell short-circuit protection is synchronously realized. In addition, the first weak part and the second weak part are fused due to overcurrent when being subjected to strong current, and dual protection can also be achieved. The battery module with the busbar can realize dual protection of internal pressure relief protection and battery cell short-circuit protection of the battery module. The battery pack with the battery module has higher safety performance.

The utility model relates to the field of circuit protection, in particular to an excitation integrated contactor with high breaking capacity, which comprises a driving system and a contact system, and further comprises an integrated excitation source, an excitation action assembly and an elastic piece, the elastic piece is arranged for one moving contact, one end of the elastic piece is fixed, the other end of the elastic piece is a free end, the excitation action assembly is fixedly connected with the free end of the elastic piece, the excitation source drives the excitation action assembly to move, the contact system is forcibly opened, and meanwhile, the elastic piece generates elastic deformation capable of restoring to the initial position; and the elastic piece, the moving contact and the excitation action assembly are all reset to initial positions during normal opening. The contactor has normal functions of the contactor and also has large current breaking and resetting functions, so that normal use of the contactor is ensured while the breaking range of the contactor is widened.

The invention discloses a power device driver and a parameter correction method thereof, which are applied to the technical field of power device driving, and are characterized in that a data acquisition module acquires grid voltage and peak current of an IGBT (Insulated Gate Bipolar Translator) in the working process of the IGBT to obtain sampling data; the digital isolation chip realizes electrical isolation among the data acquisition module, the MCU and the grid voltage regulation module; the MCU calibrates the real-time junction temperature data based on the sampling data by using a preset junction temperature calibration formula and outputs calibrated junction temperature data; the gate driving chip outputs a gate voltage capable of driving the IGBT according to the control signal; the second-order short-circuit protection module sends an abnormal signal to the MCU when the IGBT is short-circuited, so that the MCU sends a grid voltage regulation trigger signal to the grid voltage regulation module; the grid voltage adjusting module responds to the grid voltage adjusting trigger signal and controls itself to reduce the grid voltage. Based on the power device driver and the parameter correction method thereof provided by the invention, the junction temperature monitoring precision and reliability are improved.

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 provides a power converter and an energy storage system, and belongs to the technical field of power electronics. The power converter provided by the invention comprises an NPC three-level balance circuit, a current sampling circuit and a control circuit. Wherein the current sampling circuit can sample current which flows through the midpoint of a bus and flows through a clamping diode included in a first bridge arm in the NPC three-level balance circuit. The control circuit can determine that the clamping diode or the internal switching tube in the first bridge arm has a short-circuit fault if the current is detected to be large under the condition that the external switching tube in the first bridge arm is switched on or the internal switching tube in the first bridge arm is switched off. At the moment, the control circuit stops outputting the PWM signal to the NPC three-level balance circuit, so that each switching tube in the NPC three-level balance circuit is turned off, and the diffusion of the short-circuit fault can be avoided. Therefore, short-circuit protection of the NPC three-level balance circuit is realized, and fire caused by electric leakage of the NPC three-level balance circuit is avoided.

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.

A multi-circuit protection valve assembly, comprises, is attached to or integrated into a main housing, and comprises an air inlet; main outlets; main supply lines; and main overflow valves for protecting the main outlets. The valve assembly further comprises an extension part having, attached to or integrated into an extension housing, an extension inlet; an extension outlet; an extension line; and an extension overflow valve for protecting the at least one extension outlet, wherein the extension housing is detachably fixed to the main housing such that the extension inlet is flow-connected to an auxiliary outlet in the main housing.The extension housing is detachably fixed to the main housing by a hollow screw having a cavity. Compressed air discharged through the auxiliary outlet can be conducted through the cavity inside the hollow screw to the extension overflow valve and the at least one extension outlet.

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 provides a primary and secondary fusion ring main unit which comprises a ring main unit body frame which is welded with a side plate, so that the overall structural strength and stability are enhanced, and the fault and maintenance cost is reduced. The mounting key holes of the connecting cross beams facilitate accurate mounting of components, and efficiency and precision are improved. The copper bar holes and the adjusting sheets of the sliding ring slide rail ensure that the copper bars are tightly connected, and electric energy loss is reduced. And the U-shaped contact of the bus connecting sheet sliding ring and the limiting rod guarantee stable electrical connection. And the circuit breaker is matched with the station switch, so that a fault circuit can be quickly cut off, and equipment is protected. A station switch and an operation button of the cabinet door outer plate are convenient to operate, and the error risk is reduced. The whole structure is convenient to overhaul and maintain and reduces workload. The cable fireproof blocking baffle can prevent fire from spreading, the rear cover plate can prevent dust and the like from entering, the cable connector ensures safe and reliable connection, the safety and reliability of the ring main unit are improved comprehensively, and the service life of the ring main unit is prolonged comprehensively.

The invention belongs to the technical field of aircraft power supply systems, and particularly relates to an aircraft single-phase emergency alternating current power supply system and a switching method. Comprising an AC power distribution box, an emergency AC power control box, a DC power distribution box, a power control and display module and a static converter. The alternating current power distribution box is used for connecting an onboard main alternating current power supply or an auxiliary alternating current power supply or a static converter power supply, supplying power to alternating current electric equipment and transmitting a single-phase normal alternating current bus bar power supply to the emergency alternating current power supply control box; the emergency AC power supply control box is used for carrying out real-time power loss monitoring on a single-phase normal AC bus bar in the AC power supply distribution box, connecting the single-phase normal AC bus bar in the AC power supply distribution box with a single-phase emergency AC bus bar when power loss is monitored, and connecting the single-phase emergency AC bus bar with the single-phase normal AC bus bar in the AC power supply distribution box when power loss is monitored. The static converter is connected with the single-phase emergency AC bus bar, and self state information and output power information of the static converter are fed back to the power control and display module; the direct-current power supply distribution box is used for accessing an airplane direct-current power supply, providing an emergency direct-current power supply for the power supply control and display module and the static converter, and realizing power supply input control and short-circuit protection of the static converter; and the static converter is used for converting the emergency direct-current power supply output by the direct-current power supply distribution box into a single-phase alternating-current power supply and feeding back state information of the static converter to the power supply control and display module. The problem of reliable and automatic conversion of the single-phase emergency alternating current power supply under the condition that the airplane loses a main power supply system and an auxiliary power supply system and a normal alternating current bus bar loses power is solved.

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.