118 results about "Pulse transformer" patented technology

The invention relates to the technical field of automatic driving, in particular to an automatic driving image data semantic segmentation method. Comprising the following steps: acquiring image data and corresponding event data at the current moment in an automatic driving scene; performing voxelization preprocessing on the event data; the image data and the event data are fused in a self-adaptive cross-modal manner through three lightweight pulse feature fusion modules of the encoder; a pulse transform module is used for carrying out aggregation on the fused data; carrying out feature enhancement representation on the aggregated data by using three pulse feature enhancement modules of the decoder; and inputting the feature enhanced data into the segmentation model to obtain a final result. According to the method, high-quality segmentation precision and low-power-consumption operation can be realized under the harsh conditions of complex dynamic scene, violent illumination change or limited edge equipment computing power and the like.

A pulse generating system includes a primary capacitor positioned along a primary side of a pulse generating circuit, and configured to store electrical energy, and a primary switch positioned along the primary side. The pulse generating system also includes a pulse transformer configured to step up voltage from the primary side to a secondary side of the pulse generating circuit; an output capacitor; and a secondary switch positioned in the secondary side, wherein the output capacitor is electrically coupled to the pulse transformer through the secondary switch.

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 power stage includes a control device and a power transistor, the control device comprising a primary circuit comprising: a control module able to generate a control current, a primary circuit malfunction detector able to detect a malfunction, a pulse transformer comprising a primary winding connected to the primary circuit, comprising a secondary winding connected to the secondary circuit, magnetically coupled to the primary winding and able to generate, from the control current, an induced pulse current making it possible to drive the power transistor, a secondary circuit comprising: a power and fault detection controller able to detect a malfunction of the secondary circuit or of the power transistor, the power and fault detection controller being able to communicate the malfunction of the secondary circuit or of the power transistor to the primary circuit malfunction detector.

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.

The invention belongs to the technical field of artificial intelligence neural networks, and particularly relates to a pure pulse-driven Transform neural network automatic architecture search method. A TransSpikingform network structure is combined, a pulse word segmentation device, a pulse Transform block and a classification head are included, and efficient feature extraction is achieved through a self-attention mechanism and pulse neuron characteristics. The invention further provides a method based on non-training neural architecture search, an optimal model is quickly screened by defining a search space and generating a candidate architecture and taking FLOPs as an index, and an evolutionary algorithm is combined for iterative optimization, so that the method adapts to different resource constraints. The method shows higher accuracy and remarkable energy consumption advantages on different data sets, can automatically search for an optimal model structure according to resource constraints, and is suitable for various equipment resource conditions. Through an innovative SN-ConvBN pulse residual connection structure, non-pulse calculation in traditional residual connection is avoided, it is ensured that all operations conform to the event-driven principle, and energy consumption is remarkably reduced.

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.

The present description relates to an apparatus for controlling pre-charging of a mass capacitor and for detecting a fault in a DC current circuit comprising a mass capacitor, at least one DC voltage source, and at least a first pre-charge switch coupled to an electrode of the mass capacitor. The device comprises at least a pulse transformer provided with a primary coil and at least a first secondary coil and a second secondary coil, and a circuit for controlling the pre-charging of the bulk capacitor, the circuit being coupled to the primary coil of the pulse transformer. A first secondary coil of the pulse transformer includes a first terminal configured to be coupled to a control input of the first pre-charge switch. A second secondary coil of the pulse transformer is configured to be coupled in parallel with the bulk capacitor.

The invention discloses a hardware accelerator supporting pulse Transform calculation and an acceleration method of the hardware accelerator. The accelerator comprises a control module, a PE calculation unit array, a matrix processing array, a full-connection core and a storage module. The PE calculation unit array is used for realizing tasks of pulse convolution calculation, pulse distribution and membrane potential maximum pooling calculation; the matrix processing array is used for realizing an operation task of a pulse matrix based on a bit AND and bit OR operation mode; and the full-connection core is used for realizing a pulse full-connection calculation task. According to the invention, acceleration support of a pulse self-attention mechanism and a Transform architecture is realized through the PE calculation unit array, the matrix processing array and the full-connection kernel, and meanwhile, the calculation energy consumption of the accelerator is reduced by adopting a bit AND and bit OR operation mode, so that the deployment universality of the accelerator is improved.

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.

The present invention discloses a variable-frequency pulse power supply for electro-desalting and a method for generating the same. A master-slave dual-inverter device is adopted. The first inverter device is connected to low-voltage alternating current, and the second inverter device is connected to an energy storage capacitor. The first inverter device provides a bipolar low-voltage pulse power supply in the positive cycle, and then performs step-up processing through a pulse transformer to form a high-voltage DC pulse power supply. When the current of the low-voltage pulse power supply in the positive cycle or the negative cycle reaches the upper limit value, the energy storage capacitor absorbs the freewheeling energy of the pulse transformer device through the slave inverter device; after the energy storage capacitor stores energy, the second inverter device and the first inverter device superimpose and output a low-voltage pulse power supply. Through this generation method, the freewheeling energy of the pulse transformer device during the output of the low-voltage pulse power supply can be recovered, and the power supply efficiency can be improved.

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 relates to the technical field of magnetic devices, and discloses a high-reliability pulse transformer and network transformer, and the high-reliability pulse transformer comprises a magnetic core which comprises a middle column, and a first flange and a second flange which are respectively connected to the two ends of the middle column; the first electrode, the second electrode, the third electrode and the fourth electrode are arranged on the first flange at intervals; the fifth electrode and the sixth electrode are arranged on the second flange at intervals; the primary winding and the secondary winding are wound on the middle column and are respectively provided with a primary center tap and a secondary center tap, leads at two ends of the primary winding are respectively connected with the first electrode and the second electrode, leads at two ends of the secondary winding are respectively connected with the third electrode and the fourth electrode, and leads at two ends of the secondary winding are respectively connected with the third electrode and the fourth electrode. And the primary center tap and the secondary center tap are respectively connected with the fifth electrode and the sixth electrode. The reliability of the device 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 present application discloses a pulse transformer that combines high transformation ratio with fast pulse output capability, relating to the technical field of pulse transformers. The transformer comprises an insulating core, a variable impedance wire, and an insulating film wound around the insulating core. The variable impedance wire has a gradually varying width corresponding to the transformation ratio and transmission requirements. The present application has the beneficial effect of gradually varying the variable impedance wire as a conductive layer on the pulse transformer to achieve impedance change. This impedance change causes multiple reflections and transmissions during electromagnetic wave propagation, thereby compressing the pulse width. This allows the pulse transformer to have both high voltage boost capability and fast pulse output capability.

A gate drive circuit of a power converter includes semiconductor devices connected in series and pulse transformers, each of which includes a primary winding and a secondary winding. The primary windings of the pulse transformers are connected in series; the secondary windings of the pulse transformers are respectively connected to the semiconductor devices directly or indirectly; and the pulse transformers establish insulation between a primary side and a secondary side of the pulse transformers, while transmitting electric power or electric power and control signals from the primary side to the secondary side. Auxiliary windings are provided that establish magnetic coupling between the pulse transformers.

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.