57 results about "Pulse load" patented technology

A tracking and adaptive compensation method for power fluctuation of a pulse load of a ship is provided. The method includes: based on a microgrid topology model of the ship, a pulse load model of the pulse load, and an interharmonic power and pulse parameter relationship model, performing power fluctuation tracking, frequency selection and a power spectrum analysis to obtain filtering parameters of a low-pass filter and filtering parameters of a band-pass filter; performing waveform adaptation to eliminate a phase delay caused by the low-pass filter and the band-pass filter, and obtaining a control command for a power compensation strategy; and generating, by a power loop, a pulse width modulation (PWM) signal to control a switching tube in a bidirectional direct current (DC) / DC converter of each of an energy storage battery pack and a supercapacitor of a hybrid energy storage system.

The invention discloses a wafer scribing process, which comprises the following steps of: amplifying the line width of a saw street dummy copper conductor and continuously filling to form a shearing buffer copper strip; performing double-pulse laser annealing on the shear buffer copper strip to generate a twin crystal softening layer; back infrared gradient preheating is carried out according to the thermoplastic transition temperature of the copper strip, the feeding rate and the rotating speed of a tool are corrected in combination with vibration data coupling, and a plastic initial saw kerf is obtained; layering progressive deep cutting is carried out according to multi-gear cutting depth data, so that the copper strip slides to absorb energy under the pulse load and is elastically reset through a low dielectric layer, and a full-depth saw kerf is formed; and performing constant-temperature crystal locking and gradient cooling in a nitrogen environment, so that the twin crystal structure of the copper strip is stable and is interlocked with the dielectric layer shrinkage hoop, and a flexible bridging unit is generated on the side wall of the saw kerf. According to the technical scheme, the interlaminar shear stress can be subjected to peak clipping and shunting at the cutting moment, selective layering of a multi-layer interconnection interface is inhibited, and the yield and long-term reliability of the ultrathin wafer are improved.

The invention relates to the technical field of pulse load energy optimization control, in particular to a pulse type ultra-low power consumption energy management system based on a super capacitor, which comprises a pulse spectrum analysis unit, a capacitor bank dynamic tuning unit and a charge state compensation unit, a pulse spectrum analysis unit extracts a load pulse dominant frequency component through a window function weighting algorithm to generate a target frequency value, and a capacitor bank dynamic tuning unit inquires a mapping table according to the target frequency to adjust series-parallel connection combination of the super capacitors and injects a reverse reactance component to offset a resonant impedance difference value. And the charge state compensation unit predicts the residual charge quantity by using a Kalman filter, and triggers a charge redistribution strategy in a non-pulse period, thereby solving the problems of insufficient dynamic impedance matching and low charge balance efficiency in the traditional technology, realizing high-efficiency and low-consumption management of the energy of the super capacitor, improving the energy transmission efficiency, and reducing the energy consumption. And the endurance time of the equipment is prolonged.

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.

The invention discloses a DC-DC converter control circuit suitable for a high pulse load, and belongs to the field of DC-DC converter control circuits, and the DC-DC converter control circuit comprises a voltage outer loop compensation circuit, a current amplitude limiting circuit, a current inner loop compensation circuit and a pulse width modulation circuit. The output end of the voltage outer loop compensation circuit is connected with one end of the current amplitude limiting circuit, the other end of the current amplitude limiting circuit is connected with the input end of the current inner loop compensation circuit, and the output end of the current inner loop compensation circuit is connected with the pulse width modulation circuit. According to the invention, the current amplitude limiting circuit and the loop compensation circuit are utilized to realize closed-loop regulation of the output inductive current, so that the capacity of outputting the capacitor of the converter is improved, the current response speed is accelerated, the stable output capacity and reliability of the converter are ensured, and the adaptability of a high-pulse load working condition is improved.

The present application belongs to the field of automobile electronics, and provides a kind of automobile wire harness fuse wire current carrying capacity matching test method and system, comprising: establishing standardization pulse loading profile, constant current test is extended to cover the composite dynamic test sequence of peak thermal shock and average thermal accumulation;Collect fuse thermal accumulation integral value and wire insulation layer multi-point temperature, introduce three-dimensional evaluation index, identify thermal response asynchronous condition;Pulse peak and duty cycle are gradually increased, respectively, approach the limit of wire transient temperature rise and fuse thermal accumulation melting boundary, determine the safe matching interval by cross comparison;According to the safe matching interval, divide the matching level, select the optimization for asynchronous risk and overheating priority failure combination respectively, and feed back the optimization result to the selection specification.The test distortion problem caused by the asynchronous thermal response of fuse and wire under dynamic pulse current is solved, and the matching reliability and test accuracy of automobile electrical system are improved.

The application belongs to the technical field of terminal power management, and particularly relates to a power supply control method and device for power failure continuation reporting and charging stability of a terminal and a storage medium, wherein the terminal comprises a main / backup power automatic switching circuit, a state indication signal, a communication module and a communication module independent boost power supply circuit; the controller distinguishes the main power / backup power supply state by reading the state indication level of the switching circuit, anti-jitter determination through fixed period sampling and consistent confirmation for multiple times; when the backup power supply is powered, the independent boost power supply circuit is started to maintain the key data continuation reporting of the communication module, and the non-key load is turned off according to the demand; when the main power supply is powered, the independent boost power supply circuit is turned off and the backup power supply loop load is released, and the large pulse load is restored in a timely manner if necessary. The application solves the problems of power supply switching burr misjudgment, switching transient amplification and unstable charging current in the prior art, and realizes the dual protection of power failure continuation reporting and charging stability.

The invention relates to the technical field of motor control, and discloses a motor control method for compressor driving, which comprises the following steps: acquiring a stator current signal and a direct current bus voltage signal, extracting voltage pulsation characteristics based on the direct current bus voltage signal, and determining a quadrature-axis current compensation initial value; the amplitude of the stator current signal is calculated, an inductance magnetization characteristic table is retrieved when the amplitude crosses a linear magnetization current threshold value, and the inductance drop proportion is determined; and correcting a quadrature-axis current compensation initial value by utilizing an inductance drop proportion, and injecting a corrected compensation instruction into a current adjusting ring. By fusing voltage pulsation sensing and a magnetic saturation correction mechanism, pulse load interference of a single-rotation period of the compressor is cooperatively offset, a torque output gap in a magnetic circuit saturation state is completed, and the compensation precision of the compressor is improved. And stator current oscillation in a low-frequency operation state is suppressed, and the torque response rigidity under all working conditions is maintained.

The invention discloses a high-power radar power fluctuation control method and evaluation method. The control method comprises the following steps: setting a high-power radar load power factor lag and a full-load power factor not less than a preset full-load power factor threshold; aiming at power-on and power-off of the high-power radar and multiple working states of each power mode, setting a corresponding jump load average change rate limit value when the high-power radar is switched among the working states to be within a preset change rate threshold value; determining a lag power factor of the high-power radar in each power mode, determining the maximum percentage of the load power fluctuation quantity corresponding to each power mode in the rated capacity of the generator, determining the total rated capacity of the generator corresponding to each power mode, and calculating an allowable pulse load limit value of the high-power radar in each power mode; and finally setting the pulse power capacity of the high-power radar during the transmission period in each power mode not to exceed the corresponding pulse load limit value. The method can effectively reduce the impact of the radar pulse load on the power grid.

This invention provides a diesel generator set speed control method based on power feedforward, characterized by the following steps: Step M1: The generator set controller reads the current speed N and rated speed n of the diesel generator set from the speed sensor; reads the current active power P of the pulse load. t The active power P at the previous sampling time t' The current active power P t and the calculated power differential signal P e The signal is transmitted to the feedforward controller; Step M2: Calculate the feedback control signal; Step M3: Calculate the feedforward control signal Y. a Step M4: Feedback control signal and feedforward control signal Y a A voltage signal is generated by superimposing these signals using a specific algorithm and output to the electronic speed governor. This changes the oil supply, thereby altering the engine speed and bringing the power and speed deviations close to zero. This invention enables generator sets to achieve high-precision and rapid response to fast-dynamic loads such as pulse loads, and improves system stability.

The invention belongs to the technical field of automobile electronics, and provides an automobile wire harness fuse wire current-carrying capacity matching test method and system, and the method comprises the steps: building a standardized pulse loading profile, and expanding a constant current test into a composite dynamic test sequence covering peak thermal shock and average thermal accumulation; collecting a fuse thermal accumulation integral value and a wire insulation layer multi-point temperature, introducing a three-dimensional evaluation index, and identifying a thermal response asynchronous condition; respectively approaching the transient temperature rise limit of the wire and the thermal accumulation fusing boundary of the fuse by adopting a mode of gradually increasing the pulse peak value and the duty ratio, and determining a safety matching interval through cross comparison; and dividing matching levels according to the safety matching interval, respectively carrying out model selection optimization aiming at asynchronous risk and overheat priority failure combinations, and feeding back optimization results to model selection specifications. The problem of test distortion caused by thermal response asynchronization of the fuse and the wire under the dynamic pulse current is solved, and the matching reliability and the test accuracy of an automobile electrical system are improved.

The invention discloses a low-frequency kiloampere pulse current generator which is characterized by comprising a first working power supply, a second working power supply, a pulse generator and N isolation driver amplification units, wherein the first working power supply is respectively connected with one end of the pulse generator and a first power input end of each isolation driver amplification unit; the other end of the pulse generator is connected with the signal input end of each isolation driver amplification unit; the second working power supply is connected with the second power input end of each isolation driver amplification unit; n is a positive integer. Good test adaptability can be provided for pulse loads such as a TR assembly, and the defect that standard load equipment in the market cannot simulate the instantaneous pulse current is overcome.

The utility model discloses a cam type underground power device which comprises an upper connector and an oscillation device outer shell, the right end of the upper connector is connected with the left end of a middle shell through pipe threads, and the middle shell is connected with a lower connector through pipe threads. An upper end cover and an oscillation device outer shell are placed in the middle shell; the oscillation device outer shell is connected with the lower bearing end cover in a through hole shaft clearance fit mode, a static cam is further connected into the middle shell in a threaded mode, and the drill bit connector is connected with the movable cam in a threaded mode. The cam type underground power device is a composite tool which is provided with a high-frequency pulse oscillation load and a high-frequency axial pulse load so as to assist rock breaking; according to the cam type underground power device, the problems of poor drillability, low mechanical rotating speed, long drilling period and the like in the drilling process of a deep well hard formation can be well solved, the drilling speed is increased, and meanwhile the stick-slip phenomenon of a PDC drill bit is effectively reduced.

A system and method for filtered visualization of dynamic load monitoring via a power distribution unit (PDU) collects power measurement data measured from each end device plugged into, and drawing operating power from, the PDU. The PDU collects the power measurement data into power state data over a line cycle or series of time intervals. Within the PDU, Kalman filtering determines a current power state estimate based on the measured power state data balanced with predictions of subsequent power state, as well as tuning parameters defining the balance from line cycle to line cycle. The resulting power state estimate may be displayed or presented to provide a more intuitive representation of operating power drawn by the end devices as opposed to raw power measurement data, which may be subject to fluctuation caused by high performance / AI pulsing loads.

The invention provides a frequency stability control method and system for a pulse load ship electric isolated network, and the method comprises the steps: constructing an energy flow map of the ship electric isolated network, and configuring an isolated network shock wave transmission model; when a pulse load is detected, the model is used to predict the diffusion of a frequency energy shock wave, and a reverse power flow for dissipating the shock wave is reversely calculated. A pulse load node is used as a space focus, and a beam forming algorithm is used to decompose the reverse power flow into original power instructions added with phase delay parameters and distributed to a plurality of distributed energy storage units. And performing time domain shaping on each original power instruction through an inertia damping control model for simulating physical characteristics, generating a target power instruction with a stress relaxation attenuation characteristic, and driving and executing the target power instruction. According to the invention, the compensation power of the plurality of energy storage units is focused on a disturbance source in space, so that the technical problems of low frequency suppression efficiency and secondary oscillation caused by response lag and spatial non-focusing in a traditional control method are solved.

This invention discloses a hierarchical collaborative control method, system, computer equipment, and storage medium for a hybrid energy storage system with a high-frequency pulse load. The method includes: establishing a hybrid energy storage system model for the high-frequency pulse load, including constructing a hybrid energy storage microgrid with a DC bus based on a fuel cell model, a lithium battery model, and a supercapacitor model; performing physical inertia analysis on the current response speed of a three-phase interleaved parallel converter model established based on the lithium battery model; and constructing an equivalent model of the high-frequency pulse load. The method involves power allocation of the hybrid energy storage system through a hierarchical collaborative control architecture using voltage and current dual closed-loop control of the DC bus. The hierarchical collaborative control architecture includes an energy management layer and a dynamic compensation layer. The energy management layer allocates load demand based on a frequency domain decoupling algorithm and power adjudication mechanism using filters, and the supercapacitor acts as a power balancing node to absorb high-frequency ripple and power residuals. The dynamic compensation layer overcomes the inductive physical inertia of the three-phase interleaved parallel converter through dynamic feedforward overdrive, achieving rapid power compensation for the pulse load instantaneously.

This invention discloses a high-voltage, high-power pulse power supply, comprising a full-bridge DC / DC converter, a second-order RLC circuit, and a pulse modulation circuit. The full-bridge DC / DC converter includes a first step-up transformer with a turns ratio of n, switching transistors S1, S2, S3, and S4, diodes D1, D2, D3, and D4, an inductor L, and a capacitor C. The second-order RLC circuit includes a resonant resistor Rr, a resonant inductor Lr, a resonant capacitor Cr, a switching transistor, and a diode D5. The pulse modulation circuit includes a second step-up transformer with a turns ratio of N1:N2, a core reset circuit composed of winding Lw and diode D7, switching transistors Q1 and Q2, a diode D6, and a pulse load Rpulse. This invention achieves high efficiency, stability, high precision, and high dynamic response in the pulse power supply system without affecting other operating performance, offering flexible adjustment and strong practicality.

The invention discloses a mechanical arm pulse load oscillation analysis method based on response characteristics, and the method comprises the steps: building an equivalent feedback control process of a mechanical arm pulse load according to an equivalent principle; an input and output convolution model is constructed according to mechanical arm dynamic characteristics, an impulse response function form is determined by identifying system parameters, and a mechanical arm input and output impulse response model is constructed; based on the impulse response model, a mathematical model for mechanical arm pulse load feedback control is established; and the output response of the mechanical arm under the pulse load effect is analyzed through the mathematical model. On the basis of the system response characteristics, the mechanical arm pulse load output relation is established, the mechanical arm pulse load steady state and transient state analysis method and the mechanical arm oscillation calculation method are provided, and a basis is provided for mechanical arm pulse load analysis and design.

The present invention discloses a wafer scribing process, comprising: expanding the width of the virtual copper wires in the saw street and continuously filling them to form a shear buffer copper strip; performing double-pulse laser annealing on the shear buffer copper strip to generate a twinned softening layer; performing back infrared gradient preheating based on the thermoplastic transition temperature of the copper strip and correcting the tool feed rate and rotation speed in combination with vibration data coupling to obtain a plastic initial saw kerf; performing layered progressive deep cutting according to multiple cutting depth data, so that the copper strip slides under the pulse load to absorb energy and elastically resets through the low dielectric layer to form a full-depth saw kerf; performing constant temperature crystal locking and gradient cooling in a nitrogen environment to stabilize the twin structure of the copper strip and interlock it with the dielectric layer shrinkage hoop, thereby generating a flexible bridging unit on the sidewall of the saw kerf. The technical solution of the present invention can reduce the peak shear stress between the shunt layers at the moment of cutting, suppress the selective delamination of the multi-layer interconnection interface, and improve the yield rate and long-term reliability of ultra-thin wafers.

The application discloses a kind of three-port converter energy balance control method based on power distribution of pulse frequency sudden drop, in the case where load frequency suddenly drops, the power distribution mode of AC / DC converter is switched, and the fastest change rate that AC / DC converter can provide is controlled to control input source power linearly decreases and linearly increases, after a short adjustment time, energy storage capacitor charging and discharging can be balanced, then the system enters new steady state.Compared with load frequency sudden increase, when three-phase alternating current source input power is too small, pulse load frequency sudden drop is limited by the power distribution mode of AC / DC converter, and it can make pulse load voltage fluctuate, so that the dynamic recovery time of decoupling capacitor voltage is too long, and the original power distribution mode cannot meet the demand of pulse load, so the power distribution mode of AC / DC converter needs to be switched.The problem that the dynamic performance of existing pulse power compensation control method is not optimal after load pulse frequency suddenly drops is solved.

The invention relates to the technical field of electrochemical energy storage system control, in particular to an energy storage pulse cooperative control method and system based on electrochemical recovery. The method comprises the following steps: acquiring pulse characteristic parameters of a load through a high-frequency data acquisition device; constructing an electrochemical relaxation time constant model; calculating an effective recovery window of the battery, and generating a time domain matching result; dividing a plurality of virtual subsets in the logic layer in response to the fact that the time domain matching result represents that the natural dwell time is smaller than the effective recovery window; and constructing a multi-target cooperative scheduling model, and solving to obtain an optimal control sequence for completing energy storage pulse cooperative control. Through the mode, the technical problem that an existing electrochemical energy storage life management technology is poor in control strategy adaptability under the high-frequency pulse working condition is solved, and the dynamic response adaptability, the operation economy and the battery capacity release efficiency of an energy storage system under the pulse load scene are improved.

The present invention discloses a laser pulse power supply and a corresponding excimer laser. The pulse power supply includes a first power supply module, a second power supply module, a fast response module, a high-voltage module, a first energy storage capacitor, a second energy storage capacitor, a current sampling module, a first voltage sampling module, and a second voltage sampling module. The present invention adds a fast response module to the existing technology. This module is used to adjust the voltage on the first energy storage capacitor based on real-time collection of relevant feedback current and voltage, thereby resolving the issue of slow high-voltage module response during the pulse discharge process of existing laser pulse power supplies. This ensures that the voltage output by the laser pulse power supply remains stable and does not drop during the pulse discharge process of a pulse load.

The invention provides a self-adaptive pulse load power factor boosting circuit for airborne equipment, and belongs to the technical field of power supply characteristic optimization, and the boosting circuit works under a load with power greater than or equal to 10%. The boost circuit comprises a normally-open main PFC circuit, a load state control circuit used for detecting a load state, an auxiliary PFC circuit used for being conducted under a light load, a driving circuit used for switching and a post-stage DC / DC conversion circuit used for converting an output power supply and supplying the converted output power supply to the load. The load state control circuit generates a switch instruction signal of the auxiliary PFC circuit through the detected load state and transmits the switch instruction signal to the driving circuit. According to the boost circuit, power factors of airborne high-power equipment with alternating current input from light load to full load meet standard requirements, the utilization rate of electric energy is improved, power grid pollution is reduced, and power supply quality is improved; one path of power supply voltage of the circuit is always kept in a power supply state, and the other path of power supply voltage is good in transient characteristic and dynamic response during switching control.

The invention relates to the field of electric energy quality treatment of an electric power system, and discloses a method for improving the electric energy quality of a limited-capacity system containing a pulse load, and the method comprises the following steps: S1, Clark conversion; s2, positive and negative sequence separation and Park transformation; s3, direct current component extraction; s4, performing inverse transformation and instruction synthesis, and synthesizing required compensation instruction current; s5, on the basis of a timing hysteresis comparison method, a fixed-frequency timer is used for replacing a traditional hysteresis comparator, current tracking of a fixed switching frequency is achieved, and the electric energy quality of a limited-capacity system containing a pulse load is improved, and the system is characterized by comprising a limited-capacity power source, the pulse load and an SVG device connected to an alternating-current bus in parallel; according to the scheme, through an improved SVG detection and control strategy, the electric energy quality problem of a limited capacity system containing a pulse load is effectively solved, and the power supply reliability and stability of the system are improved.

This invention discloses a high-energy hydroelectric detonation method using composite power pulse modulation, mainly comprising composite power modulation, load energy modulation, shock wave waveform modulation, and shock wave loading modulation. In composite power modulation, a composite power pulse is formed by superimposing a high-amplitude short-pulse pulse with a low-amplitude long-pulse pulse. In load energy modulation, a rapid phase transition of the metal wire is achieved through the high-amplitude component of the composite power pulse, and the plasma channel is maintained through the long-pulse component, igniting the metal powder to release energy. In shock wave waveform modulation, a high-amplitude shock wave is generated during the rapid phase transition stage of the metal wire, and a large-impulse shock wave is generated during the plasma channel expansion stage and the metal powder combustion stage; these two components are superimposed to regulate the shock wave waveform. In shock wave loading modulation, the intensity of the composite shock wave is adjusted according to measured rock parameters; the high-amplitude component is used to induce rock fracturing and reduce rock strength, while the large-impulse component is used to expand the fracturing range, achieving controllable rock fracturing.

A driver circuit (10, 100) may include a power controller (40) to convert an input power into an output voltage; a high frequency switch (42) providing a short duration pulse of the output voltage such that a pulsed load current flows through the load; a current sensor (44) generating a signal representative of the pulsed load current; a sample and hold circuit (46) that samples a signal representing the pulse load current in synchronization with the high-frequency switch and holds a sampled signal value; and a controller (20) responsive to the sampled signal value and applying a control signal to the power controller to generate a desired output voltage and to the high frequency switch and the sample and hold circuit to control the pulsed load current to a predetermined value. A corresponding method (200) and efficiency improver are disclosed. The load may include a semiconductor laser diode or a light emitting diode.

The present invention relates to a three-phase analog pulse load with high precision and high dynamic response. The three-phase power supply is rectified into direct current by a three-phase uncontrolled rectifier bridge. A spike voltage absorption circuit, a total of n + 1 load branches from 0 to n, are connected in parallel between the positive and negative buses of the DC circuit. Each load branch includes a high-speed power switch device in series with a resistor, and each resistor is in parallel with a freewheeling diode. Among them, the capacity of each load branch is defined as the ratio of the square of the DC bus voltage to the resistance value of the load resistor. The capacity of load branch 0 is designed as the minimum adjustment capacity P0 of the system. The rated power capacity of each of the load branches from 0 to n - 1 is designed according to a geometric progression with a common ratio of 2, and the designed capacity Pn of the nth load is taken as (1 + r%)Q N -2 n P0, where the rated capacity requirement of the system is Q N , and the margin is r%. The present invention is used to meet the test requirements of pulse loads for three-phase AC power supplies or power generation sets.

The present invention discloses a method, device, and storage medium for optimizing the configuration of an aircraft power system. The method utilizes an optimized two-stage low-pass filtering energy management strategy to obtain three different power signals, which are respectively distributed to the generator, lithium battery system, and supercapacitor system of a high-voltage direct current power system. This method implements intelligent optimized configuration of a power system containing high-power pulse loads, can achieve optimized performance configuration of the power system with light weight, small size, and high efficiency, and provides guidance for capacity design of aircraft power systems containing high-power pulse loads.