23 results about "Leakage energy" patented technology

The invention discloses a high-power microwave amplitude limiting circuit which has a three-stage structure, a first-stage circuit and a second-stage circuit are respectively composed of three Schottky diodes at the upper part and three Schottky diodes at the lower part, and a third-stage circuit is respectively composed of three PIN diodes at the upper part and three PIN diodes at the lower part and is symmetrically distributed. Each stage of circuit is connected by a quarter-wavelength impedance transmission line, and two ends of the circuit are connected in series with a capacitor. After a radio-frequency signal is input from the first port, the Schottky diodes are rapidly conducted and generate direct current, the direct current can provide forward bias for the PIN diodes which are reversely connected in parallel after passing through the Schottky diodes of the first two stages, the bias current can rapidly reduce the forward conduction resistance of the PIN diodes, the PIN diodes are made to be in an approximate short-circuit state, and therefore the positive conduction resistance of the PIN diodes is reduced. The current is output from the third stage, and at the moment, the circuit can reflect most incident power so as to achieve the purpose of amplitude limiting. The invention overcomes the defects of difficult circuit structure adjustment, poor performance and the like, and has the advantages of low power consumption, large power capacity, small peak leakage energy, small response time and the like.

The invention relates to the technical field of valve detection, and discloses a ball valve airtightness detection method and system. The method comprises the following steps: in a pressurization and pressure maintaining test, synchronously acquiring multi-channel pressure information flow, and constructing a three-dimensional pressure field dynamic evolution sequence reflecting a sealing interface pressure transmission process; time-frequency domain cross comparison is carried out on the sequence and a leakage signal simulation library, potential leakage characteristic signals are extracted, reverse tracing analysis of a leakage energy propagation path is carried out on the potential leakage characteristic signals, and therefore space coordinates and energy intensity of a suspected leakage source are determined. And finally, calculating an overall leakage state index, and generating a sealing state evaluation map and a maintenance operation sequence. According to the method, the transformation from single-point pressure monitoring to three-dimensional pressure field dynamic analysis is realized, the position of a leakage source can be accurately positioned, and the detection intuition and the maintenance pertinence are improved.

The embodiment of the invention provides a method for determining storage energy consumption of tasks in a cluster. The method comprises the steps that the number of the tasks running in the cluster is determined; based on the number, determining a first output parameter, a second output parameter and a third output parameter of a power supply for supplying power to the cluster within a first duration; determining idle energy consumption and inherent energy consumption of the cluster based on the first output parameter, the second output parameter and the third output parameter; the inherent energy consumption comprises electric leakage energy consumption and activation energy consumption; determining that the number of tasks running in the cluster is multiple, and obtaining first total energy consumption of the cluster; acquiring a plurality of first energy consumption in one-to-one correspondence with the plurality of tasks; based on the first total energy consumption, the idle energy consumption, the inherent energy consumption and the plurality of first energy consumption, determining a plurality of second energy consumption in one-to-one correspondence with the plurality of tasks; wherein the first energy consumption is the energy consumption generated by the task occupying the processing unit in the cluster within the first duration; the second energy consumption is the energy consumption generated by the task occupying the storage unit in the cluster within the first duration.

The application relates to the technical field of semiconductor devices, in particular to a bonding substrate, an elastic wave device and a module. The bonding substrate comprises a support substrate with a first surface and a second surface opposite to the first surface; a near-surface layer of the support substrate close to the first surface is an absorbing layer; the absorbing layer is a porous structure, and the pore diameter of the porous structure is below 1 nm. The bonding substrate provided by the application can make the longitudinal leakage energy of the elastic wave be transmitted and consumed in the absorbing layer, so that the stray signal cannot be reflected back to the device surface, thereby effectively absorbing the longitudinal leakage energy of the elastic wave device, reducing the body wave reflection and solving the stray signal of the elastic wave device.

The invention discloses a power supply conversion device, a control method thereof and a power supply system. The power supply conversion device comprises a conversion unit and a buffer unit, wherein the conversion unit comprises an inversion module, a voltage transformation module and a rectification module; the inversion module is arranged on the primary side of the transformation module, and the rectification module is arranged on the secondary side of the inversion module; an external direct-current power supply supplies power to a load side after passing through the inversion module, the voltage transformation module and the rectification module; and the buffer unit is arranged between the rectification module and the load side and is used for absorbing leakage inductance energy of the secondary side of the transformation module and supplying power to the load side under the condition that the transformation unit works. According to the scheme, the buffer unit is arranged between the rectification side and the load side of the conversion circuit, so that the leakage inductance energy of the secondary side of the transformation unit can be absorbed, the switching loss of a switching device in the inversion module can be reduced, and the power supply efficiency can be improved.

The application discloses a soft switching device of a switching power supply, the switching power supply and a control method thereof. The device comprises a transformer and a switching tube. The transformer has a primary winding and a secondary winding. The primary winding comprises a first winding. A power supply bus of the switching power supply is connected to the same name end of the first winding. The different name end of the first winding is connected to the first connection end of the switching tube. The second connection end of the switching tube is grounded. The secondary winding is output to a load. The first connection end of the switching tube is connected to the second connection end of the switching tube through an absorption unit and a resonance unit, forming a resonance absorption loop. In the case that the switching tube is turned off, the leakage energy of the transformer is absorbed at the switching tube turn-off moment and resonance is performed, so that the peak voltage of the switching tube is reduced when the switching tube is turned on in the next period, and soft switching of the switching tube is realized. According to the scheme, the soft switching of the switching tube is realized by using the energy of the leakage inductance in the switching power supply, and the turn-on loss and turn-off loss of the switching power supply are reduced.

The application discloses a flyback converter circuit, a flyback switching power supply and a power adapter, and relates to the technical field of switching power supplies, which comprises a transformer, a main switch tube, an energy storage inductor, a first diode and a second diode. The first end of the energy storage inductor is connected to a power input end; the anode of the first diode is connected to a common node of a transformer primary winding and the main switch tube, and the cathode of the first diode is connected to the second end of the energy storage inductor; the anode of the second diode is connected to the second end of the energy storage inductor, and the cathode of the second diode is connected to a ground end. When the main switch tube is turned off, the energy in the transformer leakage inductance is transferred through the first diode and stored in the energy storage inductor, effectively clamping the voltage peak on the main switch tube; when the main switch tube is turned on again, the energy in the energy storage inductor is released back to the power input end through the loop formed by the second diode. The application realizes lossless absorption through the capture and reuse of leakage energy, and significantly improves the overall working efficiency of the power supply.

The invention discloses a flyback conversion circuit. The flyback conversion circuit comprises an input filter capacitor, a power conversion circuit, a clamping capacitor and an isolated active absorption circuit; the input filter capacitor is used for filtering input voltage; the power conversion circuit comprises a switching tube, a first transformer and a clamping diode; the switching tube is connected with a primary winding of the first transformer in series, the primary winding of the first transformer is used for receiving filtered input voltage, a secondary winding of the first transformer is used for providing output voltage, the clamping diode is connected with the clamping capacitor in series to form a clamping circuit, and the clamping circuit is connected to the two ends of the primary winding of the first transformer in parallel; and the active absorption circuit with isolation is used for providing electrical isolation between the clamping circuit and the input filter capacitor, absorbing leakage inductance energy of the first transformer and feeding back the leakage inductance energy to the input filter capacitor. According to the embodiment of the invention, efficient conversion and active recovery of leakage inductance energy can be realized, and electromagnetic interference can be reduced.

CMOS harvesting circuits are disclosed for conventional 6T SRAM bitcell arrays enabling substantial improvements to SRAM access time, pipeline performance and to SRAM active and leakage energy consumption—without scaling operating voltages while also improving Read and Write margins using assist schemes at very low area and energy overhead by reusing circuits that harvest charge.Active energy dissipation during an SRAM read access is lowered by use of novel sensing schemes that self-limit signal development on the BL without the energy overheads seen in conventional designs from sense-amp offsets, BL column leakage and uncertain read current. Improvements in access time are enabled by increasing the signal development rate on the BL—by comparing the rising electric potential of harvested charge with a decreasing BL voltage in a bitcell column using a novel and compact inverting amplifier with dynamic reset. This area and energy efficient scheme leveraging availability of harvested charge not only self-limits signal development on the BL to lower active power and improve read latency, but also eliminates most of the uncertainty of BL voltage signal from uncertain read current by using a capacitive divider. Charge harvested in each column of bitcells from a read / write access is moved to a local harvest grid with a fraction of the capacitance of the BLs accessed in the subarray, at a voltage closer to VDD and is readily tapped into during a following Write access lowering write energy consumption from the power grid by over 30%. Active or standby mode leakage is lowered by the raised voltage of the harvesting node in each column—that is discharged only before the WL selects—for all columns during a Read and for half-select columns during a Write.

Various embodiments of the present disclosure relate to an electronic device for determining whether to drive at least one corresponding harvesting unit on the basis of an operation state of at least one component of the electronic device, and an energy harvesting method therefor. To this end, the electronic device can determine an operation state of at least one component of the electronic device, determine whether to drive at least one corresponding harvesting unit on the basis of the operation state, drive the at least one corresponding harvesting unit on the basis of determining whether to drive same, and, in response to driving the at least one corresponding harvesting unit, convert, into electrical energy, at least one leakage energy generated in the at least one corresponding component.

The invention discloses a compensation method and device for energy leakage in signal processing and a storage medium, and the method comprises the steps: calculating a noise reduction power time delay spectrum, the maximum diameter of the noise reduction power time delay spectrum and the related energy and phase information of an adjacent diameter, calculating the energy ratio and phase change based on the related energy and phase information, judging the channel type, and carrying out the compensation of the energy leakage in the signal processing. Judging whether the channel is a low-delay channel, and if not, directly performing delay spread estimation on the channel; and if yes, selecting a position point with serious energy leakage to carry out leakage energy ratio estimation, compensating the leakage energy of each position point to an original position, and then carrying out time delay spread estimation. The obtained power delay spectrum is more matched with a real channel environment, the problem of energy leakage caused by decimal sampling deviation and IFFT introduction is solved, the energy ratio and phase change are used for channel judgment, the probability that an effective path is misjudged as leaked energy can be reduced, the estimation accuracy of delay extension in an AWGN or low delay extension scene is further improved, and the estimation efficiency is improved. And the demodulation capability in the scene is improved.

The invention discloses a vehicle-mounted hydrogen system leakage identification method, system and device, a medium and a product, and relates to the field of hydrogen fuel cell vehicle safety monitoring, and the method comprises the steps: obtaining a leakage response signal, including a vibration signal and a deformation strain signal, of a vehicle-mounted hydrogen system pipeline, and carrying out the preprocessing operation; performing frequency domain feature extraction and time domain feature extraction on the preprocessed leakage response signal to obtain frequency domain feature data and time domain feature data; and if the frequency domain characteristic data is located in a preset leakage energy ratio interval and the time domain characteristic data meets a preset pulse leakage judgment condition, judging that the vehicle-mounted hydrogen system leaks and giving an alarm. According to the invention, monitoring is carried out based on pipeline vibration and deformation signals, rapid, accurate and non-intrusive leakage identification of the vehicle-mounted hydrogen system is realized through frequency domain and time domain double-feature fusion judgment, the problems of slow response, easy interference, difficult positioning, risks caused by intrusive measurement and the like are effectively overcome, and the real-time performance and reliability of monitoring are improved.

The application relates to the technical field of valve detection, and discloses a method and system for detecting the air tightness of a ball valve. The method comprises the following steps: in a pressurization and pressure maintenance test, a multi-channel pressure information flow is synchronously collected, and a three-dimensional pressure field dynamic evolution sequence reflecting a pressure transmission process of a sealing interface is constructed. By cross-comparing the sequence with a leakage signal simulation library in a time-frequency domain, a potential leakage characteristic signal is extracted, and reverse tracing analysis of a leakage energy propagation path is carried out, so that the spatial coordinates and energy intensity of a suspected leakage source are determined. Finally, an overall leakage state index is calculated, a sealing state evaluation atlas and a maintenance operation sequence are generated. The method realizes a change from single-point pressure monitoring to three-dimensional pressure field dynamic analysis, can accurately locate a leakage source position, and improves the intuitiveness of detection and the pertinence of maintenance.

To construct a system that avoids limiting factors such as permission to change a monitoring position and dispersion of microwaves, eliminates problems caused by the intrusion of obstacles, transmits energy between mobiles with high efficiency, and enables the flight time or distance of mobiles to be extended.SOLUTION: A mobile-to-mobile power supply system 301 includes a first mobile 101 and a second mobile 201. A retrodirective operation in the microwave power transmitting unit 200 of the second mobile 201 and a retrodirective operation in the microwave power receiving unit 100 of the first mobile 101 are repeated to always keep the leakage energy between a power transmitting unit side array antenna 210 and a power receiving unit side array antenna 110 at a minimum level, and a self-converging beam is formed between the power transmitting unit side array antenna 210 and the power receiving unit side array antenna 110 so as to avoid obstacles to power transmission which intrude the gap between the power transmitting unit side array antenna 210 and the power receiving unit side array antenna 110.SELECTED DRAWING: Figure 1

The application discloses a kind of vehicle-mounted hydrogen system leakage identification method, system, equipment, medium and product, it is related to hydrogen fuel cell vehicle safety monitoring field, the method includes obtaining the leakage response signal of vehicle-mounted hydrogen system pipeline including vibration signal and deformation strain signal and carries out preprocessing operation;The preprocessed leakage response signal is respectively subjected to frequency domain feature extraction and time domain feature extraction, and frequency domain feature data and time domain feature data are obtained;If frequency domain feature data is located in the preset leakage energy proportion interval, and time domain feature data meets preset pulse discriminant leakage condition, then determine that vehicle-mounted hydrogen system occurs leakage and carries out alarm.The application is monitored based on pipeline vibration and deformation signal, is judged by frequency domain and time domain double feature fusion, realizes the leakage identification of fast, accurate, non-invasive of vehicle-mounted hydrogen system, effectively overcome the problem, such as slow response, easily disturbed, difficult to locate and the risk brought by invasive measurement, improves the real-time and reliability of monitoring.

A bidirectional co-flow DC / DC converter and method using coupled inductors includes two secondary coupled inductor branches to achieve higher voltage conversion factor, current sharing characteristics and soft switching; due to the use of a double current path inductor structure, the voltage conversion ratio is improved, and the current can be shared in all operating modes; all active switches use soft switching of the synchronous rectification concept, which helps to reduce conduction loss; the converter in the application does not require additional circuit elements to achieve soft switching, and can achieve higher efficiency operation. The converter in the application uses two parallel inductor current paths to share input current in boost and buck modes, thereby reducing the rated current of a single coil, which helps to reduce input current ripple. Due to the advantages of the topology, the leakage energy is directly transmitted to the load, and the maximum measured efficiency in the buck mode under the condition of 170W and the boost mode under the condition of 190W is 96.12% and 96.63% respectively.

The invention discloses an LC coupling inductor series connection type direct current boost converter, and belongs to the technical field of power electronic converters. The problem that an existing boost converter is poor in boost capacity is solved. An inductor, a capacitor, a diode and coupling inductors (N1 and N2) are combined in a specific series-cross connection mode to form an integrated high-gain unit. According to the invention, the turn ratio of the coupling inductor is improved and the voltage bootstrap effect of the capacitance-inductance network is utilized, so that high voltage gain can be realized under a medium duty ratio. Meanwhile, leakage inductance energy of the coupling inductor can be automatically and losslessly recycled and utilized through the specific connecting structure, voltage spikes of the switching tube and the diode are effectively restrained, voltage stress is reduced, an additional dissipative absorption circuit is not needed, and therefore the efficiency and reliability of the converter are remarkably improved while the boosting capacity is improved. The method is suitable for DC power conversion occasions requiring high step-up ratio, such as new energy power generation and distributed power supply systems.

The invention discloses a power station drain valve internal leakage energy recovery system and an operation method, relates to a drain valve energy recovery system and an operation method, and aims to solve the problem of energy waste caused by the fact that closed-loop coupling of a drain valve internal leakage recovery scheme and a steam turbine regenerative system is not realized in the prior art. The device comprises a closed tank body, a condensed water inlet pipe, a condensed water outlet pipe, a condensed water heat exchange pipe and a plurality of drainage main pipes, the condensed water inlet pipe and the condensed water outlet pipe are installed on the closed tank body, the condensed water heat exchange pipe is installed in the closed tank body, the outlet end of the condensed water inlet pipe is connected with the inlet end of the condensed water outlet pipe through the condensed water heat exchange pipe, and the multiple drainage main pipes are installed on the closed tank body and communicated with the closed tank body. Steam flowing into the closed tank body from the drainage main pipe exchanges heat with condensed water in the condensed water heat exchange pipe. The invention belongs to the field of power generation.

The invention relates to AC-DC conversion electric leakage energy storage equipment, which comprises a case, an energy storage battery and a rectifier are arranged in the case, the rectifier is electrically connected with an external AC power supply, the rectifier is electrically connected with the energy storage battery through an electric leakage protection structure, and the rectifier is used for converting AC into DC and transmitting the DC to the energy storage battery through the electric leakage protection structure; the rectifier is electrically connected with an electric leakage alarm structure. The technical problems that the adaptation effect of energy storage equipment is poor, and electric leakage cannot be found in time are solved, and alternating current and direct current are flexibly converted through the rectifier; when electric leakage occurs, the electric leakage alarm structure gives an alarm in time, and meanwhile, the electric leakage alarm structure drives the electric leakage protection structure to disconnect the electric connection between the rectifier and the energy storage battery through the electric control driving structure so as to protect the energy storage battery, so that the use safety of the energy storage equipment is improved.

The invention relates to a combinational circuit of multiple flyback switching power supplies. The combinational circuit is characterized in that the positive electrode of a power supply is connected with the first end of a first flyback transformer; the second end of the first flyback transformer is connected with the first end of the first flyback electronic switch and the positive electrode of the diode, the negative electrode of the diode is connected with the first end of the energy storage capacitor, and the second end of the first flyback electronic switch is connected with the second end of the energy storage capacitor and the negative electrode of the power supply. Leakage inductance energy generated by the first flyback transformer is stored in the energy storage capacitor; the negative electrode of the diode is also connected with the first end of the second flyback circuit, the second end of the second flyback circuit is connected with the second end of the energy storage capacitor, and the second flyback circuit is used for releasing the stored leakage inductance energy and supplying power to the second flyback circuit when the first flyback electronic switch is switched off; therefore, the energy storage capacitor is used as a power supply of the second flyback circuit, leakage inductance energy of the first flyback circuit is recovered and utilized, heat loss of the leakage inductance energy is avoided, and the efficiency of the power supply is improved.

The invention discloses a method for calculating the leakage inductance of a high-frequency transformer under non-sinusoidal excitation, and the method comprises the following steps: decomposing a non-sinusoidal high-frequency excitation source introduced into the high-frequency transformer into a plurality of sinusoidal high-frequency excitation sources through Fourier decomposition; according to the winding insulation gap of the high-frequency transformer needing to be calculated, a proper basic algorithm is selected, and the leakage inductance of the small-capacity high-frequency transformer is calculated through two Dowell correction algorithms; the sum of the leakage inductance energy generated by each sine excitation source is equal to the leakage inductance energy generated by the non-sine excitation source; respectively calculating leakage inductance energy of the high-frequency transformer under each high-frequency sine excitation source by using a basic algorithm so as to obtain leakage inductance under each harmonic wave; according to the proportion of the effective value of the harmonic component in the total effective value of the non-sine excitation, performing weighted correction calculation on the basic leakage inductance algorithm to obtain the leakage inductance of the high-frequency transformer under the non-sine excitation; according to the method, the leakage inductance of the high-frequency transformer under non-sine excitation is corrected and calculated, and the precision is greatly improved.

An embodiment of the present application provides a method for determining leakage energy consumption and a semiconductor memory, the method comprising: writing a high-level signal to an array area of ​​a memory through a power supply to obtain the total heat dissipated by the memory, the memory comprising a storage capacitor in the array area, and switching tubes in the array area and a peripheral area, the total heat dissipated by the memory comprising the leakage energy consumption of the switching tube and a first heat dissipated by the capacitor, the capacitor comprising the storage capacitor and an equivalent capacitor of the switching tube; discharging the total stored energy of the capacitor, obtaining a measured second heat dissipated by the capacitor, and determining the second heat dissipated by the capacitor as the total stored energy of the capacitor; and determining the leakage energy consumption of the switching tube based on the total heat dissipated by the memory and the second heat dissipated by the capacitor.

The invention discloses a safety socket based on active pulse injection and energy conservation and a use method of the safety socket. The safety socket comprises a monitoring module and a control module, wherein the monitoring module comprises a current transformer, a built-in NTC (Negative Temperature Coefficient) temperature sensor and an independent high-frequency ADC (Analog to Digital Converter) sampling channel; the protection execution module comprises an electromagnetic release; the electromagnetic release is connected with the control module; the control module comprises a microprocessor with a built-in high-frequency signal generator; the high-frequency signal generator is configured to inject a micro-pulse signal into the power supply loop at a zero crossing point of alternating current; the microprocessor is configured to receive the electrical response data of the power supply loop after the micro-pulse signal is injected so as to calculate a dynamic contact degradation index in real time; meanwhile, live wire and zero wire high-frequency transient electrical data collected by an independent high-frequency ADC sampling channel are received, so that differential leakage energy in a preset time window is calculated; and when the dynamic contact degradation index or the differential leakage energy exceeds a corresponding preset safety threshold value, the microprocessor drives the electromagnetic release to cut off the power supply loop.