85 results about "Pulse transformer" patented technology

The invention relates to the technical field of power electronics, and discloses a dielectric barrier discharge high-voltage series resonance system and a control method thereof. The system comprises a high-voltage series resonance circuit, an upper computer and a hardware circuit. The upper computer is electrically connected with the hardware circuit, and the hardware circuit is electrically connected with the high-voltage series resonance circuit; wherein the high-voltage series resonance circuit comprises a PFC circuit, a Buck circuit, an LC series resonance circuit, a high-voltage pulse transformer and a dielectric barrier discharge load which are connected in sequence, the high-voltage series resonance circuit converts alternating current into high-frequency high-voltage pulse voltage and provides the high-frequency high-voltage pulse voltage for the dielectric barrier discharge load, and stable dielectric barrier discharge is generated; the upper computer is used for setting parameters, the hardware circuit controls the on-off state of the Buck circuit and the LC series resonance circuit according to the parameters set by the upper computer, accurate generation and control of high-voltage pulse voltage in the dielectric barrier discharge process are achieved, and the response speed and the control precision of the system are also improved.

A series-type hybrid circuit breaker to provide protection against short circuit faults in DC or AC power circuits. A series-type hybrid circuit breaker (SHCB) forces a fault current into a high-frequency AC current with zero crossings and allows a mechanical circuit breaker to disconnect the faulty branch. The SHCB injects a transient counter voltage pulse via a pulse transformer into the main power loop upon detection of an overcurrent condition and forces the fault current to change its original direction and cross zero to a negative peak value. A generation power electronic circuit on the primary side of the transformer controls the discharge of a capacitor to generate the counter voltage pulse during the first phase of each switching cycle of the fault interruption process. The power electronic circuit then changes the polarity of the injected secondary voltage and forces the fault current to change direction and cross zero again.

The invention discloses a time-space separation pulse Transform-based target recognition method, electronic equipment and a storage medium. The method comprises the steps of obtaining event stream data which is output by a target neuromorphic visual sensor and is used for target recognition; inputting the event stream data into a pre-trained target pulse neural network, performing pulse coding on the event stream data through a coding module, and outputting pulse coding features; performing local space-time feature extraction on the pulse coding features through a feature extraction module, and outputting local space-time pulse features; performing global spatio-temporal feature extraction on the local spatio-temporal pulse features through a spatio-temporal separation pulse Transform module, and outputting global spatio-temporal enhancement features; and performing linear mapping on the global space-time enhancement features through a task output module, and outputting a target recognition result. According to the invention, while event-driven sparse calculation and low power consumption characteristics are maintained, the discrimination stability of weak, small, sparse and slow moving targets is significantly improved.

A series-type hybrid circuit breaker to provide protection against short circuit faults in DC or AC power circuits. A series-type hybrid circuit breaker (SHCB) forces a fault current into a high-frequency AC current with zero crossings and allows a mechanical circuit breaker to disconnect the faulty branch. The SHCB injects a transient counter voltage pulse via a pulse transformer into the main power loop upon detection of an overcurrent condition and forces the fault current to change its original direction and cross zero to a negative peak value. A generation power electronic circuit on the primary side of the transformer controls the discharge of a capacitor to generate the counter voltage pulse during the first phase of each switching cycle of the fault interruption process. The power electronic circuit then changes the polarity of the injected secondary voltage and forces the fault current to change direction and cross zero again.

The utility model discloses an internal and external integrated trigger circuit for an excitation fuse, which relates to the technical field of new energy circuit protection, and comprises an external trigger unit, which comprises an external trigger interface, a voltage-regulator tube D5 and a signal output interface; the internal trigger unit comprises an arc ignition fuse, a pulse transformer, a half-bridge rectifier circuit and a signal output interface; the external trigger unit receives an external trigger signal through one-way conduction of a voltage-regulator tube D5, and the external trigger signal is transmitted to the igniter through the signal output interface. According to the utility model, through a double-trigger redundancy design, double insurance is formed by external active trigger and internal self-trigger. When external triggering fails, internal triggering still can independently activate the igniter through the pulse transformer and the half-bridge rectifying circuit, and the risk that protection fails when a single Pyro fuse control loop fails is thoroughly avoided. And the response time of the excitation fuse is shorter than that of a traditional hot-melt fuse, so that the diffusion risk of a short-circuit accident is remarkably reduced.

The invention relates to the technical field of analysis instrument ionization sources, in particular to a VUV lamp ionization source device with efficient heat dissipation capacity. The device comprises a VUV lamp, a heat dissipation unit, a VUV lamp driving electrode, a driving circuit and an ion guide focusing unit. The heat dissipation unit carries out cooperative heat dissipation on the VUV lamp and the pulse transformer through a fan, and the problems of signal attenuation and device aging caused by temperature rise are solved. The driving electrode adopts a pairwise pairing structure of upper and lower and left and right electrode pairs to form an inclined electric field to prevent ions from bombarding the lamp wall and the light window; the drive circuit is a half-bridge or full-bridge topology, can adjust the pulse frequency and the power supply voltage, and achieves the switching between a high-voltage low-frequency mode and a low-voltage high-frequency mode. The ion guide focusing unit efficiently leads out and separates ions through cooperation of a conical focusing electric field and a conductive film forward electric field. Through four-dimensional innovation of heat dissipation, electrodes, driving and transmission, the stability, the service life and the detection sensitivity of the device are improved, and the device is suitable for analytical instruments such as ion mobility spectrometry and mass spectrometry.

Described herein are apparatuses and methods for applying high voltage, sub-microsecond (e.g., nanosecond range) pulsed output to a biological material, e.g., tissues, cells, etc., using a high voltage (e.g., MOSFET) gate driver circuit having a high voltage isolation and a low inductance. In particular, described herein are multi-core pulse transformers comprising independent transformer cores arranged in parallel on opposite sides of a substrate. The transformer cores may have coaxial primary and secondary windings. Also describe are pulse generators including multi-core pulse transformers arranged in parallel (e.g., on opposite sides of a PCB) to reduce MOSFET driver gate inductance.

This invention discloses a multi-port series circuit breaker with a shared injection unit and its control method. The circuit breaker includes a shared voltage injection unit, a fault selection unit, an integrated coupling inductor unit, and a multi-port main current-carrying branch. Multiple DC lines share a single voltage injection unit through the fault selection unit. The voltage injection unit injects reverse voltage into the faulty line through a pulse transformer to achieve active limitation and interruption of the fault current. This invention transforms passive commutation into series active current-limiting interruption. By sharing an active injection unit across multiple ports, the number of fully controlled switching transistors is reduced, resulting in fast interruption speed, low current loss, and low cost.

This utility model belongs to the field of electronic engineering measurement technology, specifically a test fixture for a small-power pulse transformer, including a transformer body; a connecting disc rotatably connected to the bottom inner side of the transformer body; a first gear rotatably connected to the top inner side of the transformer body; and a transmission gear ring rotatably connected to the top inner side of the transformer body; the transmission gear ring meshes with the first gear; and multiple sets of fan blades are arranged inside the transmission gear ring; during operation, the first gear is activated, causing it to rotate in the opposite direction. The first gear can interact with the elastic connecting plate through its teeth, thereby driving the connecting disc to rotate. The connecting disc can then be wound up with the fixture connecting wire fixed on its surface, thus reducing the risk of the existing fixture connecting wire being exposed to the outside for extended periods, leading to folding or damage. The overall device improves the working life of the fixture connecting wire and enhances the overall measurement efficiency.

The invention belongs to the related technical field of integrated circuits, and discloses a hardware system for deploying a sparse pulse Transform model, which comprises an event input module, a time-space pruning module, a scheduling module, a sparse pulse calculation module and a classification head output module, the time-space pruning module judges the importance of each time step and each token according to a pulse accumulated value and generates a time-space pruning mask, the scheduling module screens a token sequence according to the mask to form a sparse token sequence, the sparse pulse calculation module performs sparse reasoning on the sparse token sequence, and finally, the classification head output module outputs a classification result. The system can be used for deploying a sparse pulse Transform model through a special hardware control and scheduling mechanism, and provides an accurate execution path and efficient scheduling support for dynamically changing sparse data streams.

The present disclosure provides a rack for radiotherapy equipment and a radiotherapy equipment. The rack for radiotherapy equipment comprises a supporting assembly, a drum configured in a horizontal structure, having an axial first end and a second end, both of which are rotatably arranged on the supporting assembly, and a carrier arranged on the outer wall of the first end and adapted to carry an external pulse transformer so that the pulse transformer rotates synchronously with the drum. The drum is adapted to provide a reliable mounting platform for a super high dose rate radiotherapy equipment, so that the particle rays output by a plurality of beam modules configured on the super high dose rate radiotherapy equipment can be accurately converged in the drum. Both the first end and the second end of the drum are rotatably arranged on the supporting assembly to meet the bearing capacity requirements of the drum and other components arranged thereon, so that the rack for radiotherapy equipment forms a reliable mounting platform. The carrier is used to assemble the pulse transformer on the drum and synchronize with the drum.

This invention discloses a composite voltage waveform generator, comprising a DC generation module, a ripple generation module, a compensation module, and a control module. The DC generation module is a controllable DC voltage source connected to a capacitor voltage doubler rectifier circuit to generate a DC voltage waveform. The controllable DC voltage source includes a BUCK circuit, a BOOST circuit, a forward circuit, or a flyback circuit. The ripple generation module includes a D / A converter, a power amplifier, and a pulse transformer connected together, used to read a data sequence of length N and generate a voltage waveform fitted from N data points. The test voltage waveform generated by this invention is closer to the actual voltage condition waveform of insulating materials used in DC systems, making it more suitable for reliability testing of insulating materials used in DC systems. Furthermore, it allows for adjustment of the commutation overshoot voltage waveform based on theoretical operating conditions.

In an example embodiment, a method comprising identifying, by a primary-side controlled Universal Serial Bus Power Delivery (USB-PD) alternating current to direct current (AC-DC) converter, a first pulse, wherein the first pulse is received from a pulse transformer. The method further includes determining that a threshold duration of time is satisfied. In response to determining that the threshold duration of time is satisfied, the method includes identifying a second pulse, wherein the second pulse is received from the pulse transformer. The first pulse and the second pulse are used for control of a high-side field effect transistor (FET) and a low-side FET, where the high-side FET is coupled to an active clamp flyback (ACF) circuit and the low-side FET is coupled to a flyback transformer of the USB-PD AC-DC converter. In response to identifying the second pulse, the method further includes controlling operation of the high-side FET or the low-side FET.

The invention discloses a triggering system for triggering a gas switch based on a linear photoconductive switch, and aims to solve the problems of instability, short service life, low compactness and the like of an existing triggering system. The device is composed of a high-voltage direct-current source, a charging resistor, a charging isolation inductor, a thyristor, a pulse charging source, a gas switch, a photoconductive switch, a current-limiting resistor, a reverse inductor, a control loop and a load. The pulse charging source comprises an energy storage capacitor, a thyristor, a pulse transformer and a pulse forming line. The control loop is composed of a digital delay generator and a trigger light path. The trigger light path is composed of a laser, a beam expander, an iris diaphragm, a beam splitter and an attenuation piece according to the light path of the pulse laser. The positive electrode end of the photoconductive switch is connected with the high-voltage electrode of the gas switch, bias voltage is directly obtained through coupling of the high-voltage electrode of the gas switch in a capacitive voltage dividing mode, a high-voltage bias power source is omitted, compactness and stability are good, the service life is prolonged, and reliability is improved.

The utility model discloses a high-voltage pulse transformer, belongs to the technical field of transformers, and solves the problem that the whole high-voltage pulse transformer needs to be directly replaced when any structure is damaged because the existing high-voltage pulse transformer is basically of an integral structure. Comprising two sets of U-shaped magnetic cores, cylindrical magnetic cores integrally formed in the U-shaped magnetic cores, cylindrical frameworks arranged on the outer rings of the cylindrical magnetic cores in a sleeving mode and side frameworks arranged on the outer rings of the U-shaped magnetic cores in a sleeving mode, the side frameworks block the U-shaped magnetic cores in the length direction of the cylindrical magnetic cores, and the two ends of the side frameworks on the two sides are detachably connected with clamping sleeves. The assembly of the transformer comprises the steps of winding the coil on the cylindrical framework, aligning and inserting the magnetic core, sleeving the upper side framework and clamping, fixing by using the clamping sleeve, and finally soldering the coil pin to finish the transformer. And if maintenance is needed, reverse operation disassembly is carried out, and reassembly is carried out after damaged parts are replaced.

The present disclosure provides a charging scheduling method based on a usage feature of an electric vehicle, comprising obtaining a charging feature of a vehicle to be charged based on historical usage features; generating a scheduling instruction based on an ambient temperature and the charging feature, and sending the scheduling instruction to a charging module; the scheduling instruction being configured to adjust a series-parallel state of a pulse transformer in the charging module, to adjust charging power of the charging module; and generating a heat dissipation instruction and sending the heat dissipation instruction to a ventilation module in response to the ambient temperature satisfying a preset temperature condition.

This utility model discloses a 12-pulse photovoltaic encapsulated high-frequency reactor, comprising a housing, several 12-pulse transformers, a cover plate, and several conductor bars. The housing has an installation chamber, and the several 12-pulse transformers are spaced apart within the installation chamber. Each 12-pulse transformer includes a magnetic core and foil windings wound on two opposing iron pillars of the magnetic core. The cover plate covers the several 12-pulse transformers, and the conductor bars are connected to the cover plate and correspond to the foil windings of the several 12-pulse transformers. The structural layout and design of this utility model can reduce the overall size and losses of the reactor, and has the following characteristics: high heat dissipation, high mechanical strength, moisture and corrosion resistance, partial discharge control, low high-frequency loss, good current sharing characteristics, low parasitic capacitance, and high power density.

The invention provides a bipolar pulse power supply based on inductive energy storage, and aims to improve the energy storage density of the power supply and realize miniaturization and light weight. The pulse power supply is of a modular structure, each module comprises two switches, a pulse transformer and a main capacitor, a positive pulse winding and a negative pulse winding in a primary winding of the transformer share one magnetic core and control the two switches to be switched on in a staggered mode respectively, bipolar pulse output is achieved, the problem of magnetic core reset does not need to be considered, and the reliability of the pulse power supply is improved. And secondary windings of the module transformers are connected in series to realize voltage superposition under multiple modules. The dielectric barrier discharge multi-array reactor pulse excitation device is realized by adopting an inductance energy storage mode, has the advantages of miniaturization and few components, can realize higher input and output voltage ratio, can be driven by a battery and is low in manufacturing cost, and meanwhile, a modular structure is easy to integrate and expand, and is particularly suitable for a miniaturized and lightweight dielectric barrier discharge multi-array reactor pulse excitation application scene.

The application discloses a kind of no phase-locked loop three-phase high-power thyristor power switches and control methods, belong to circuit structure technical field, by MCU directly generates six-way trigger pulse without fixed phase difference between each other, through tristate buffer circuit, darlington drive circuit, cooperate pulse transformer circuit, prevent magnetic core saturation and realize reliable magnetic-electric isolation transmission of trigger energy to three-phase thyristor gate;Finally after MCU stops pulse output, using the characteristics of thyristor in current natural zero point automatic shutdown, so that main circuit on-off whole process no mechanical contact action, from physical root source, arc and electric spark are eliminated, so that under the condition of completely eliminating phase-locked loop and synchronous transformer, it realizes the structure simplification, strong anti-electromagnetic interference ability, stable conduction and can no arc safe shutdown of high-power power switch.

This invention relates to the field of communication technology, specifically to a bus-type RS485 isolation circuit, enhancement circuit, and enhancement method. It includes a twisted-pair cable, node 1, and node N. Each node 1 and node N contains an RS485 chip. Each RS485 chip has a transmit driver A, a receiver B, and a GND terminal. The two ends of the twisted-pair cable are connected to the transmit driver A and receiver B terminals of the RS485 chips in nodes 1 and N, respectively, via a pulse transformer TC, for isolating nodes 1 and N. The GND terminals of the RS485 chips are all grounded. A thermistor RT and a transient voltage suppressor diode are connected in parallel between the transmit driver A and receiver B of the RS485 chips. This invention takes a different approach, abandoning the traditional converter-type RS485 isolator and adopting a fully digital isolation method. Striving for simplicity, it utilizes a pulse transformer to better solve the isolation problem of a bus-type RS485 bus.

The utility model provides a high-voltage pulse transformer which is used for solving the technical problems that an existing high-voltage pulse transformer is large in size and not stable enough in insulation. The high-voltage pulse transformer comprises a concentric-square-shaped iron core, two first insulation frameworks and second insulation frameworks, two iron core columns of the concentric-square-shaped iron core are sleeved with the two first insulation frameworks respectively, the two first insulation frameworks are sleeved with the second insulation frameworks respectively, a primary winding is wound around the first insulation frameworks, and a secondary winding is wound around the second insulation frameworks. By arranging the first insulating framework and the second insulating framework which are coaxially arranged in the sleeving manner, the insulating property of the transformer is improved, the size of the transformer is reduced, and meanwhile the winding difficulty of the winding is reduced through the split type insulating frameworks.

The application discloses a PFN-LTD-based fast-front compact square-wave pulse generator, which comprises a multistage LTD unit, a pulse transformer group and a load; each stage of the LTD unit comprises a pulse forming network, a charging circuit, a charging switch and a discharging switch; the pulse forming network is composed of N capacitors and 2(N-1) isolation inductors, and isolation inductors are connected in series between the upper ends and the lower ends of adjacent capacitors; the charging switch is connected in series between the charging circuit and the pulse forming network, is turned on during charging and is turned off during discharging; the discharging switch is connected in series between the output end of the pulse forming network and the primary winding of the transformer, is turned off during charging and is turned on during discharging; and the secondary windings of the transformers are connected in series and then connected to the load. The application directly outputs a fast-front high-voltage square-wave pulse without an additional pulse compression link, and has the advantages of compactness, high efficiency and good waveform quality.

The present invention relates to the technical field of high-voltage pulse power supply modulation. Disclosed is an energy-storage type high-voltage pulse modulator for a Flash RT radiation apparatus. The energy-storage type high-voltage pulse modulator comprises an energy-storage charging power supply module, a pulse charging module, a pulse generation module and a pulse transformer, wherein the energy-storage charging power supply module is used for converting an input voltage and charging the pulse charging module; the pulse charging module is used for charging the pulse generation module; and the pulse generation module is used for generating pulses, and generating high-voltage pulses by means of the pulse transformer stepping up voltage. The present invention eliminates the impact on a power grid during a treatment process of a Flash RT device, reduces the costs of infrastructure and supporting construction, and also decreases the weight and volume of a modulator in a Flash RT radiation apparatus.

The invention provides a multi-pulse transformer. The multi-pulse transformer comprises a shell, a first connecting assembly, a second connecting assembly, a transformer main body and a tap switch, the first connecting assembly is installed at the bottom of the inner wall of the shell. The second connecting assembly is installed on the top of the inner wall of the shell. The transformer main body is located in the shell, connecting frames are arranged at the upper end and the lower end of the transformer main body respectively, and the two connecting frames are connected with the first connecting assembly and the second connecting assembly respectively; the tap switch is installed on the side face of the transformer body. According to the multi-pulse transformer, the tap switch is installed on the side face of the transformer body, a traditional cage type switch installed below a box cover on the top of the shell is replaced, a vertical space for switch installation does not need to be reserved between the top of the shell and the body, the overall height of the transformer is directly compressed, and the height limitation requirement of ocean transportation is met; and the transportation scheme adjustment cost caused by height exceeding is avoided.

The application belongs to the technical field of integrated circuits, and discloses a hardware system for deploying a sparse pulse Transformer model, which comprises an event input module, a space-time pruning module, a scheduling module, a sparse pulse calculation module and a classification head output module. The event input module converts a time sequence pulse data stream into a pulse token sequence. The space-time pruning module judges the importance of each time step and each token through a pulse accumulation value, generates a space-time pruning mask, and the scheduling module screens the token sequence according to the mask to form a sparse token sequence. The sparse pulse calculation module performs sparse inference on the sparse token sequence, and finally the classification head output module outputs a classification result. The system can be used for deploying a sparse pulse Transformer model through a special hardware control and scheduling mechanism, and provides accurate execution paths and efficient scheduling support for dynamically changing sparse data streams.

The invention discloses a pulse generator for electric spasm treatment and a control method thereof, and relates to the technical field of medical electronics. The pulse generator comprises a medical power supply, an energy storage capacitor bank, a full-bridge converter, a pulse transformer, an electrode port, a charging circuit, a current control circuit, a pulse width limiting circuit, a detection circuit and a microcontroller; the charging circuit adjusts energy storage voltage according to treatment voltage or patient impedance, and the energy storage capacitor bank adopts safe extra-low voltage energy storage; the current control circuit realizes constant current output through proportional integral control, the pulse width limiting circuit limits the maximum pulse width through hardware, and each key module has electrical isolation. The scheme solves the problems of difficult current control and large side effect of the existing equipment, improves the stability of the treatment current and the safety of the equipment, and is suitable for the electric spasm treatment of mental disorders such as depression.

The application discloses a pre-magnetized pulse transformer type zero-value insulator detection device and method, and relates to the field of insulator detection. pre and a main excitation power supply u main ; the reverse pre-excitation power supply u pre is connected with the primary side of the pulse transformer through the second switch tube Q2; the main excitation power supply u main is connected with the primary side of the pulse transformer through C1 and Q1; the pulse transformer adopts a high-remanence-ratio ferrite core; the primary side is connected with the bipolar pulse excitation circuit, and the secondary side is connected with the insulator to be detected; the primary side breakdown detection unit is connected with the primary energy storage capacitor C1; and the control and calculation unit is connected with the bipolar pulse excitation circuit and the primary side breakdown detection unit respectively. The application solves the problems of poor portability and high misjudgment rate of the existing detection device.

The invention relates to the technical field of crude oil dehydration in the petroleum industry, and discloses a crude oil electric dehydration device and method with an ungrounded neutral point and an adjustable proportion, the crude oil electric dehydration device comprises a crude oil electric dehydration tank, and is characterized by comprising a high-voltage pulse power supply system and a control unit; an upper polar plate, a middle polar plate and a lower polar plate which are parallel to one another and arranged at intervals are arranged in the crude oil electric dehydration tank; the high-voltage pulse power supply system comprises a high-frequency pulse transformer, two high-voltage ends of the high-frequency pulse transformer are respectively connected with an upper polar plate and a lower polar plate, the upper polar plate is connected with a high-voltage positive polarity, the lower polar plate is connected with a high-voltage negative polarity, a middle polar plate is not grounded, and a neutral point tap is connected with the middle polar plate through a control unit; the control unit is connected with a proportion adjusting circuit, and the control unit is electrically connected with the proportion adjusting circuit. By changing the grounding mode of the middle pole plate, the voltage proportion between the two high-voltage ends of the transformer and the neutral point tap is adjustable, and the overall dehydration efficiency is improved.

The present disclosure relates to a circuit and method for striking and stabilizing a welding arc in a welding apparatus. A pulse generation circuit (15) comprises a pulse transformer (12), a DC power source (45) coupled to at least one primary winding of the pulse transformer (12), and at least one switch (44) for enabling and disabling a flow of current from the DC power source (45) to the at least one primary winding. A secondary winding of the pulse transformer (12) is configured to provide a striking voltage pulse to a welding torch (20) when the respective at least one switch (44) is open, and to further provide an arc stabilizing current after the striking voltage pulse.

The invention relates to an anti-reflection and current abrupt change converter and a manufacturing method thereof, and the converter comprises an AC pulse coupling module, a boost pulse transformer, a rectification module, an anti-current abrupt change module and an anti-voltage recoil module, and the output end of the AC pulse coupling module is connected with the input end of the boost pulse transformer. The output end of the boosting pulse transformer is connected with the input end of the rectification module, the output end of the rectification module is connected with the input end of the current abrupt change prevention module, and the output end of the current abrupt change prevention module is connected with the voltage recoil prevention module. According to the converter, the impact of counter electromotive force reflected by the boosting pulse transformer on the alternating-current pulse source is effectively avoided through the alternating-current pulse coupling module; a boosting mode of rectifying and then connecting in series is adopted by the rectifier module, so that the risk of high-voltage reflection is reduced; a hollow choke inductor of the current abrupt change prevention module and a reverse freewheeling plate composed of a reverse freewheeling tube are adopted, so that the current abrupt change risk occurring when the output power pulse is short-circuited is effectively avoided.