243results about "Pulse generation by energy-accumulating element" patented technology

The invention provides a double-pulse high-frequency switching power supply control method and system for precise electroplating, and relates to the field of electroplating, and the method comprises the steps: collecting area surface data through a three-dimensional scanner, and obtaining a three-dimensional model; extracting a high-curvature area grid according to the three-dimensional model, and calculating to obtain a surface concave-convex degree index; performing current field simulation, and calculating current density vector distribution; when the deviation of the current density vector distribution exceeds a preset deviation threshold value, pulse parameters are optimized through a genetic algorithm; selecting a pulse parameter which is most matched with the surface concave-convex degree index, and carrying out iterative calculation to obtain updated current density vector distribution; based on the difference between the updated current density vector distribution and the initial distribution, predicting a coating thickness value, and determining a preliminary evaluation index; and optimizing pulse parameters to obtain a final control scheme of uniform current distribution. According to the method, pulse parameters can be dynamically optimized according to the geometrical shape of the workpiece, and uniform current distribution and stable plating quality are realized.

The invention discloses a pulse stable output control method and system for an ns-level high repetition frequency fast pulse power supply, and relates to the technical field of automatic control, the system is composed of a plurality of functional modules, and the system comprises a self-adaptive absorption module, a control module and an output control module, and the self-adaptive absorption module obtains power supply parameters through real-time sampling, and the power supply parameters comprise load impedance and switch tube parasitic parameters; dynamically optimizing R and C parameters of the RCD absorption circuit and the active clamping circuit based on power supply parameters; the feed-forward prediction module is used for extracting derivative state information according to the power supply parameters, acquiring load current feed-forward and resonant circuit states based on the derivative state information, modeling based on the load current feed-forward and resonant circuit states, and predicting the drain-source voltage valley bottom moment of the switch tube; and the multi-section variable impedance transmission module adopts a three-section variable impedance structure, performs broadband impedance matching based on R and C parameters of the optimized RCD absorption circuit and the active clamping circuit, inhibits pulse leading edge reflection distortion, and outputs undistorted pulse signals.

Offline prior to operation, an optimised control sequence is derived for a pulse system comprising a reactive circuit for generating electromagnetic pulses, such as a transcranial magnetic stimulation circuit, and cascaded switching modules for switchably connecting capacitive discharge elements to provide a multi-level output voltage for the reactive circuit. A discrete-time model predicts an electrical state of the pulse system. A target profile for an electromagnetic pulse is received. For respective time-steps of the control sequence taken in succession, an optimal path of switching states over a window of time-steps starting with the respective time-step is derived, optimising a cost function having a deviation cost contribution representing deviation of an electrical state of the pulse system predicted by the discrete-time model from the target profile over the window. The switching state of the determined path at the respective time-step is selected for the control sequence.

The invention discloses a plane type electric pulse triggered vacuum surface flashover switch and a use method thereof. The switch comprises an insulating substrate, an electrode assembly, a grading ring assembly and an external trigger unit. The insulating substrate is fixedly arranged in the vacuum cavity; the electrode assembly comprises an anode, a trigger electrode and a cathode which are sequentially embedded in the top of the insulating substrate from outside to inside; the grading ring assembly is located in the main gap between the anode and the trigger electrode and comprises a plurality of grading rings which are sequentially arranged in a sleeved mode, sub-gaps between the adjacent grading rings are equal, the number of the sub-gaps of the main gap and electric field distribution are changed by arranging the multiple grading rings, the field distortion coefficient of the main gap is reduced, the electric field distribution is more uniform, and the stability of the device is improved. The breakdown collaboration and time sequence consistency of the sub-gaps are ensured, and the response speed of the switch is in a ten-nanosecond order. The switch provided by the invention adopts a sheet structure, is suitable for occasions with limited height and size, and has the advantages of high conduction speed, high voltage withstanding level, short triggering time delay, recoverable self-striking and the like.

A bidirectional colorful light triggered by power-line pulse signals connected in series and parallel includes a bidirectional luminous light string triggered by power-line pulse signals, a first controllable switch, a second controllable switch, a third controllable switch, and a fourth controllable switch. The bidirectional luminous light string triggered by power-line pulse signals comprises a plurality of bidirectional light sources, which comprises a light module triggered by power-line pulse signals and a reverse light module. The light module triggered by power-line pulse signals comprises an LED colorful light group and an LED driver that drives the LED colorful light group based on power-line pulse signals loaded on power lines of the bidirectional luminous light string triggered by power-line pulse signals. This invention achieves a bidirectional colorful light driven by power-line pulse signals through the control of the second and fourth controllable switches, simplifying the control circuit.

The invention discloses a circuit integration device for plasma ignition based on direct current power supply, relates to the field of plasma ignition, and aims to solve the problems that an existing plasma ignition technology cannot be directly compatible with aviation low-voltage direct current and is poor in reliability. A core electronic function module comprises a high-frequency resonance inversion topological unit, an energy driving adjustment topological unit, a full-wave rectification topological unit, a control unit, an arc striking unit and an energy storage unit. The high-frequency resonant inversion topology unit converts input direct current into high-frequency alternating current pulse; the energy driving and adjusting topological unit drives and adjusts the high-frequency resonant inversion topological unit, so that the alternating voltage output by the high-frequency resonant inversion topological unit is increased to 400-430V; the full-wave rectification topological unit converts the alternating current voltage output by the high-frequency resonance inversion topological unit into stable direct current high voltage and supplies power to the control unit, the arc striking unit and the energy storage unit.

The pulse generation circuit includes: a capacitor having one end connected to a power source and the other end connected to a ground potential; one end of the primary side of the transformer is connected with one end of the capacitor, and the secondary side is connected with a load; an inductor having one end connected to the other end of the primary side of the transformer; a switching element connected between the other end of the inductor and a ground potential; the cathode of the diode is connected with the other end of the primary side of the transformer, and the anode is connected with a ground potential; and a control circuit capable of controlling an ON state and an OFF state of the switching element, the control circuit controlling the switching element to be in the ON state, and the control circuit controlling the switching element to be in the OFF state during a period in which the direction of the current flowing on the primary side of the transformer becomes opposite after the current flows on the primary side of the transformer.

A plasma deposition system comprising a wafer platform, a second electrode, a first electrode, a first high voltage pulser, and a second high voltage pulser. In some embodiments, the second electrode may be disposed proximate with the wafer platform. In some embodiments, the second electrode can include a disc shape with a central aperture; a central axis, an aperture diameter, and an outer diameter. In some embodiments, the first electrode may be disposed proximate with the wafer platform and within the central aperture of the second electrode. In some embodiments, the first electrode can include a disc shape, a central axis, and an outer diameter. In some embodiments, the first high voltage pulser can be electrically coupled with the first electrode. In some embodiments, the second high voltage pulser can be electrically coupled with the second electrode.

This application discloses a high-efficiency, low-overshoot pulsed laser current source control method and system, relating to semiconductor laser technology. It is applied to a pulsed constant current source comprising a DC-DC buck-boost circuit, a soft-start circuit, a pulse generation circuit, and an FPGA digital control circuit. The DC-DC buck-boost circuit and the FPGA digital control circuit are controlled by the FPGA digital control circuit. The control method includes: the FPGA digital control circuit as the control core, acquiring the current signal from the pulse current output terminal of the pulse generation circuit as a feedback signal; adjusting the gate voltage UGS of the power MOSFET Q6 of the pulse generation circuit and the output voltage VOUT of the DC-DC buck-boost circuit according to the feedback signal; the control method includes four stages: a pre-trigger stage, a fast rise stage, an overshoot suppression stage, and a constant output stage. This application achieves the dual goals of microsecond-level current response and high-efficiency, stable operation through dynamic matching.

An implantable pulse generator (1) comprises a pulse generation device (12) configured to generate an output pulse, the pulse generation device (12) comprising a control unit (120), a shock generation circuitry (121) and an output circuitry (122). The shock generation circuitry (121) comprises at least one first energy storage device (C1-C4), at least one second energy storage device (C5) and a first switching device (S5). The first switching device (S5) is electrically connected, at a first circuit node (Al), to the at least one first energy storage device (C1-C4) and is configured to connect, in a closed state, the at least one first energy storage device (C1-C4) with the at least one second energy storage device (C5) and to disconnect, in an open state, the at least one first energy storage device (C1-C4) from the at least one second energy storage device (C5). The shock generation circuitry (121) comprises a first connection line (LI) connecting said first circuit node (Al) to the output circuitry (122) and a second connection line (L2) connecting the at least one second energy storage device (C5) to the output circuitry (122). The shock generation circuitry (121) is configured to generate an output pulse by supplying energy to the output circuitry (122), in the open state of the first switching device (S5), from the at least one first energy storage device (C1-C4) via the first connection line (L1) and, in the closed state of the first switching device (S5), from the at least one first energy storage device (C1-C4) and the at least one second energy storage device (C5) via the second connection line (L2).

This invention belongs to the field of analog integrated circuit technology, specifically relating to a frequency adaptive circuit for downhole detection. This invention utilizes a closed-loop adaptive feedback mechanism, employing multiple excitation frequencies generated by a frequency generator to continuously match and adapt to the transducer's resonant frequency. When a set of excitation frequencies achieves the highest matching degree with the resonant frequency, the echo energy reaches its peak. The frequency generator is adaptively adjusted based on the excitation frequency corresponding to the maximum peak signal obtained during the detection phase, and this optimal excitation frequency is used to generate the excitation signal in subsequent operations, thus completing the adaptation between the excitation frequency and the resonant frequency. This invention effectively avoids the influence of downhole temperature and pressure changes on the transducer's resonant frequency, and combines high automation, good real-time performance, and high imaging quality.

A high power (HP) generator (10) and method for delivering pulsed high power having high voltage and / or current values ​​to a capacitive load, in particular a plasma process, comprising: several low power (LP) generators (14, 16, 18), Each LP generator (14, 16, 18) comprises an energy storage component (C1, L1), and in use, the energy storage component (C1, L1) is charged to a predetermined value associated with the energy storage component; several low power (LP) generators (14, 16, 18), each LP generator (14, 16, 18) providing, in use, at its output an LP generator value corresponding to the value of an energy storage component (C1, C2, Cn, L1, L2, Ln) incorporated in the respective LP generator (14, 16, 18); a combiner (20), in which the LP generators (14, 16, 18) are electrically connected so that a combiner value at an output of the combiner (20) can be obtained which corresponds to an output value of the HP generator (10), the combiner value being higher, in use, than the LP generator value at the output of one of the LP generators (14, 16, 18), at least in some states of the HP generator (10); a control unit (22) configured to select the contribution of the LP generators (14, 16, 18) to the output value of the HP generator (10) during the output delivery of the HP generator (10) in order to cause a rise and / or a decay of the pulses at the output of the combiner (20), A high power (HP) generator (10) and method, wherein charging energy for the LP generators (14, 16, 18) is provided via a transformer (T1, T2...Tn) comprising a main winding (P1, P2...Pn) and a secondary winding (SW1, SW2...SWn) for each LP generator (14, 16, 18).

To provide a technique for controlling energy of ions colliding with a substrate by a voltage pulse applied to a bias electrode.SOLUTION: The disclosed plasma processing apparatus includes a chamber, a substrate support, a plasma generator, and a bias power supply. The substrate support includes a bias electrode and is provided in the chamber. The plasma generating unit is configured to generate plasma from a gas in the chamber. The biasing power supply is electrically connected to the biasing electrode and configured to generate a sequence of a plurality of voltage pulses. Each of the plurality of voltage pulses has a leading edge period transitioning from a reference voltage level to a pulse voltage level and a trailing edge period transitioning from the pulse voltage level to the reference voltage level. At least one of the time length of the leading edge period and the time length of the trailing edge period is longer than 0 seconds and equal to or shorter than 0.5 μ seconds.SELECTED DRAWING: Figure 1

The utility model relates to an energy storage pulse power supply, in particular to an energy storage pulse power supply capable of fast switching, which comprises a power supply cabinet and single power supply mechanisms sequentially stacked in a cavity of the power supply cabinet from top to bottom, and a fast switching structure is arranged in the cavity at the bottom of the power supply cabinet. According to the utility model, the rapid switching structure is connected in parallel in the power supply grid, so that the rapid switching structure can respond rapidly when the grid is powered off, the use effect of continuous power supply is realized through the stacked single power supply mechanisms in the power supply cabinet, the power failure time is reduced, the response speed is improved, and the power supply of the single power supply mechanisms can be cut off when the power supply of the grid is recovered. And the fourth cable is arranged between the input mechanism and the output mechanism in a sliding adjustment mode, the closing state between the input mechanism and the output mechanism can be controlled, when the input mechanism and the output mechanism are disconnected, the disconnection mechanism and the output mechanism are conducted at the moment, and the power supply use effect is achieved.

An arc welding apparatus 70 comprises a welding power supply device 40 and a welding torch 50 holding a non-consumable electrode 52. The welding power supply device has a main circuit 10, a high-frequency generating circuit 30, and a control unit 20. The main circuit is electrically connected to the electrode 52 and supplies a welding output to the electrode. The high-frequency generating circuit has a charging unit 33, a charging switch 32 electrically connected to the charging unit, and a discharging switch 34 electrically connected to the charging unit. The high-frequency generating circuit generates a high-frequency voltage VRF between a base material 80 and the electrode by discharging the charging unit. The control unit controls charging of the charging unit by activation of the charging switch and discharging of the charging unit by activation of the discharging switch.

Provided are a control circuit and a control method for a switch transistor. The control circuit includes: a control unit (210) configured to output a control signal; and a microwave unit (220) having a transmitting terminal connected to the control unit (210) and a receiving terminal connected to at least one switch transistor (230). The transmitting terminal is configured to receive the control signal and convert the control signal into a microwave signal. The receiving terminal is configured to convert the microwave signal into the control signal to control turn-on or turn-off of the at least one switch transistor (230). The control circuit may turn on or turn off the switch transistor quickly without causing crosstalk in the circuit, even if dead time of the control signal is short. In addition, since transmission of microwaves does not rely on any medium, a distance between the transmitting terminal and the receiving terminal of the microwave unit can be relatively long, thereby avoiding the crosstalk in the circuit, and preventing the switch transistor from being wrongly turned on.

The invention provides a control circuit and a control method for a pulse load power supply system, and the control circuit is used for being connected to a power supply main circuit comprising a pulse load, and specifically comprises a phase acquisition module, a signal conversion module, a linear expansion state observer, a voltage control loop, a current control loop, a signal inverse transformation module and a pulse width modulation module. The linear expansion state observer is used for observing load disturbance in real time and generating a load current feed-forward signal, the load current feed-forward signal and an initial current instruction output by the voltage control loop are synthesized in the first summator to form a compensated current instruction, and the compensated current instruction is transmitted to the current control loop; and finally converting into a switching signal for driving a converter in the power supply main circuit. The low-cost, high-performance and high-reliability suppression of the pulse load disturbance is realized.

Devices, systems, and methods providing for improved detection of a high frequency component in an input signal are described. A detector includes a detector stage configured to receive an input signal and generate a detection signal that represents the input signal. The detector also includes an amplifier stage that configured to receive the detection signal from the detector stage and amplify the detection signal to generate an output signal that indicates whether the input signal includes a high frequency component. In some examples, the detector stage includes a switched cap detector and the amplifier stage includes a first switched cap amplifier and a second switched cap amplifier. In some examples, the switched cap detector and the first switched cap amplifier are operated responsive to a first clock signal, and the second switched cap amplifier is operated responsive to a second clock signal different than the first clock signal.

A bias source and a plasma processing system are disclosed. One bias source comprises an output node, a return node, and a power section coupled to the output node and the return node. A resonant switch section is coupled to the power section at a first node, a second node, and a third node, and the resonant switch section is configured to apply an asymmetric periodic voltage waveform to the return node at the output node by connecting and disconnecting current paths between the first node and the second node. The asymmetric periodic voltage waveform includes a first portion that starts from a first negative voltage and changes to a positive peak voltage, a second portion that changes from the positive peak voltage level to a third voltage level, and a fourth portion that includes a negative voltage ramp from the third voltage level to a fourth voltage level.

The invention provides a switched capacitor resonant type large-current pulse power supply and a control method thereof.The switched capacitor resonant type large-current pulse power supply comprises a direct-current input source, an inverter circuit, a resonant cavity and a transformer, and the direct-current input source is connected with the direct-current end of the inverter circuit; the resonant cavity is connected in series with a primary winding of the transformer and then connected to an alternating current end of the inverter circuit, a secondary winding of the transformer is used for connecting a load, and the transformer is a step-down transformer; the inverter circuit outputs positive-voltage square waves, the resonant cavity generates resonance to form sine-like resonance current, the resonance current forms large-current pulses in a load loop of a secondary side through the transformer, and when the resonance current reaches zero, the resonance current is maintained to be zero. According to the invention, soft switching of all switching tube devices can be realized, the current stress of a semiconductor device is reduced and the reliability and efficiency are improved by adopting the transformer, and meanwhile, a full-control device is adopted, so that high-frequency pulse output can be realized.

The generator (10) according to the invention contains at least one converter module with a transformer, the secondary winding of which is electrically connected to the electrode (17) of an instrument (12) and to a counter electrode (14). The primary winding of the transformer is connected to operating voltage on the one hand and to ground on the other hand via an electronic switch. The switch blocks periodically, whereby voltage pulses are generated in the secondary winding, which feed a spark or other plasma for the medical treatment of a patient. A voltage detector is used to display the plasma length. This detects the voltage occurring at the primary winding and displays it via an indicator device (24). The invention is based on the idea that the voltage occurring at the primary winding, in particular the peak voltage, characterizes the length of the generated plasma (16).The inventor has found that factors other than the plasma length are of minor importance in influencing the voltage measured at the primary coil.

The invention relates to the technical field of power supply circuits, in particular to a modular circuit of a high-repetition-frequency pulse power supply and a control method of the modular circuit. According to the technical scheme, the device comprises a preceding-stage AC-DC charging unit, an energy storage capacitor, two pulse discharging modules connected in parallel and a discharging switch, and the preceding-stage AC-DC charging unit is used for converting alternating current input into direct current. According to the invention, by adopting a standardized and parallelizable modular circuit architecture, flexible and linear adjustment of the maximum output current of the system is realized, the product development and delivery cycle for different current requirements is remarkably shortened, and the customization and maintenance cost is reduced; meanwhile, the total power is dispersed to a plurality of independent modules through the design, the limit requirement for a single power device is lowered, and the reliability and maintainability of the whole system are improved; under the design of synchronous triggering and current sharing, all the modules can cooperatively output high-quality and high-consistency pulse current.

The application provides a direct current pulse signal control system and a semiconductor processing device, which combines a first control signal generated according to an alternating current analog signal and a second control signal generated according to a pulse digital signal into a mixed synchronization signal, the first control signal acts on a direct current energy supply module through a direct current state control module to control the charging state of the direct current energy supply module, so that the output direct current voltage signal is within a threshold range; the second control signal acts on the direct current energy supply module through a direct current output control module to modulate the direct current voltage signal, so that a direct current pulse signal meeting process requirements is obtained and output to the semiconductor processing device as a bias voltage. The application can accurately regulate and control the bias voltage, improve the adaptability, anti-interference ability and response stability of the system, and optimize the process performance of semiconductor processing.

The invention discloses a compact Marx generator based on an impact ionization semiconductor device, and relates to the field of a pulse power technology and a power semiconductor device crossing technology. Comprising N stages of sub Marx generators which are cascaded in sequence, and each sub Marx generator comprises an impact ionization semiconductor device, a first charging isolation element, a second charging isolation element, an energy storage unit, a first ground capacitor and a second ground capacitor; for any stage of sub Marx generator, the first end of the impact ionization semiconductor device is connected with the first end of the first charging isolation element, the first end of the first ground capacitor and the first end of the energy storage unit, the second end of the first ground capacitor is grounded, the second end of the impact ionization semiconductor device is connected with the first end of the second charging isolation element, and the second end of the second charging isolation element is grounded. The second end of the second charging isolation element is connected with the second end of the energy storage unit and the first end of the second ground capacitor, and the second end of the second ground capacitor is grounded. According to the compact Marx generator, the conduction safety is improved.

The application provides a charge pump circuit, relates to the technical field of electronic electricity, and comprises a charge pump core circuit, a non-overlapping clock circuit and a floating GND circuit. The charge pump core circuit is based on a bootstrap capacitor structure, transmits charges in a manner that the gate potential is higher than the drain potential in the on phase of a switch tube, and eliminates threshold voltage loss; the non-overlapping clock circuit generates a plurality of phase non-overlapping clock signals and controls the on and off of the switch tube of the charge pump core circuit; and the floating GND circuit dynamically adjusts the ground potential of the charge pump according to the size of the input voltage, clamps the difference between the output voltage and the power supply voltage, and ensures the stability of the output voltage. The beneficial effects are that the bootstrap capacitor structure is adopted to eliminate the threshold voltage loss of the conventional charge pump, the conversion efficiency is improved, the non-overlapping clock is used to avoid reverse current, the circuit reliability and working efficiency are improved, the floating GND circuit is used to clamp the output voltage, there is no continuous static current, and the static power consumption is effectively reduced.

The invention relates to a high-voltage direct-current generation circuit of a plasma generator. The high-voltage direct-current generation circuit comprises a first rectifying unit, a filtering unit, a self-oscillation unit, a boosting unit and a second rectifying unit, and the self-excited oscillation unit is used for inverting the second direct current into the second alternating current. And the boosting unit is used for boosting the second alternating current to obtain a third alternating current. And the second rectifying unit is used for rectifying the third alternating current to obtain a third direct current. The self-oscillation unit comprises at least one pair of switch tubes and a positive feedback winding. The self-oscillation unit comprises at least one pair of switching tubes and a positive feedback winding, and the positive feedback winding provides induced positive feedback current for the control ends of the switching tubes under the condition that current in a primary winding of a transformer is increased, so that the switching tubes are gradually changed from a micro-conduction state to a conduction state. And the burnout phenomenon caused by sudden conduction of the switch tube can be avoided.

The invention discloses a repetition frequency nanosecond pulse power source of a Marx generator based on impedance matching. The repetition frequency nanosecond pulse power source comprises a pulse forming unit, an impedance matching network and a trigger control unit which are integrated in a closed box body, the impedance matching network comprises a conical cylindrical inner conductor and multiple stages of cylindrical outer conductors which are sequentially and coaxially arranged from top to bottom, the bottom ends of the outer conductors are connected with the last-stage outer conductor, the top ends of the outer conductors are connected with an external load, and the multiple stages of outer conductors and the inner conductor form a central coaxial transmission line; the pulse forming unit comprises a plurality of stages of discharge loops which are stacked in series, and each stage of discharge loop corresponds to one stage of outer conductor; each stage of discharge loop comprises a plurality of discharge modules which are annularly arranged at equal intervals around the corresponding outer conductor; and the trigger control unit is used for generating nanosecond leading edge trigger pulses to drive the high-voltage switches of the discharge loops at all levels to be switched on. According to the invention, the cost and the size of the power source can be reduced, the energy transmission efficiency is improved, the synchronous triggering precision is improved, and the repeated-frequency nanosecond pulse output capability is stable.

The invention discloses a solid-state switch output pulse voltage top drop compensation method and circuit, and the method comprises the steps: monitoring the discharge time of a main pulse in real time when a main pulse generation unit outputs pulse voltage, and immediately injecting a compensation current into an energy storage module of the main pulse generation unit when the main pulse begins to discharge, the compensation current is used for counteracting voltage drop caused by discharge of the energy storage module, so that the top of the discharge voltage of the main pulse generation unit is kept flat during discharge. According to the invention, solid-state switch output pulse top drop compensation is simply and efficiently realized.

A pulse generator comprises a circuit configured to generate a coarse pulse width (CPW) signal, a first delay unit configured to generate a first delayed coarse pulse width signal, a delay locked loop circuit configured to generate a first subphase signal and a second subphase signal, a first analog interpolator, a second analog interpolator, and an amplifier having a first input connected to the first analog interpolator and a second input connected to the second analog interpolator and configured to generate a fine pulse width modulation signal.