297 results about "Current generation" patented technology

The invention discloses an energy scheduling method, system and device for a low-earth-orbit satellite and a medium. The method comprises the steps that the energy storage level is calculated according to the current generation power of the low-earth-orbit satellite, the current remaining electric quantity of an energy storage unit and the health degree of a battery; generating a future illumination time sequence according to the orbit parameters of the low-orbit satellite and the satellite attitude control data; according to the current operation state data of each device loaded on the low earth orbit satellite and a preset task list, generating corresponding task prediction energy consumption data arranged in a descending order according to the importance level through a historical energy consumption model; according to the energy storage level, the future illumination time sequence and the task prediction energy consumption data, calculating the dominant power supply amount, matching the energy consumption demand in the task prediction energy consumption data, and carrying out the preferential power supply of the equipment of the task item with the high importance level. And carrying out power supply adjustment on the other equipment by adopting at least one strategy of delaying to the illumination period, reducing the operation power and shortening the operation duration so as to realize efficient scheduling on the energy of the low-orbit satellite.

The invention discloses a wave generation-flow generation-vibration table combined loading method based on test wave elements, and the method comprises the steps: starting a flow generation device to form a stable flow field, and monitoring the flow velocity uniformity in real time through a flow velocity sensor; starting wave making equipment to generate a target wave, synchronously acquiring wave crest arrival time through a wave sensor arranged along the wave propagation direction, and calculating a wave period and a wave propagation speed; selecting the wave crest of the wave period of the target characteristic wave, calculating the phase time offset according to the phase of the target characteristic wave, and calculating the propagation time of the target characteristic wave based on the wave propagation speed, the horizontal distance from the wave sensor to the center of the vibration table and the phase time offset; and obtaining the initial loading time of the vibration table, and calculating the final starting time of the vibration table according to the initial loading time of the vibration table and the target characteristic wave propagation time. According to the invention, the loading time sequence and parameters of the vibration table are accurately controlled, and accurate and synchronous loading of waves, ocean currents and vibration is realized.

The invention relates to the technical field of semiconductors, in particular to a temperature sensor, a chip and electronic equipment. The temperature sensor comprises a current generation module; the current generation module comprises a current generation circuit and a chopping operational amplifier unit, and the current generation circuit is electrically connected with the chopping operational amplifier unit; the chopping operational amplifier unit is used for receiving a first chopping signal and a second chopping signal, and the current generating circuit is used for outputting a first current signal under the condition that the chopping operational amplifier unit receives the first chopping signal and outputting a second current signal under the condition that the chopping operational amplifier unit receives the second chopping signal. The first current signal and the second current signal are used for determining the detection temperature, and the first chopping signal and the second chopping signal are opposite in phase. According to the scheme, the influence of operational amplifier imbalance on the detection precision of the temperature sensor can be eliminated, and the output precision of the temperature sensor is improved.

The invention discloses a thermoelectric solar power generation power intelligent prediction method, equipment and a medium, belongs to the technical field of thermoelectric solar power generation prediction, and aims to solve the problems that the existing pressure-bearing high-conversion thermoelectric solar power generation power prediction is easy to be subjected to complex influence of various unstable data, so that the prediction of the power generation power is not accurate enough, and the prediction efficiency is low. And the working performance of the power generation system is influenced. The method comprises the following steps: periodically extracting spatio-temporal features of GFS meteorological data to obtain multi-dimensional meteorological features; carrying out characterization analysis on the equipment operation state of the thermoelectric solar power generation system to obtain power generation state characteristics; performing space-time alignment processing on the multi-dimensional meteorological features and the power generation state features, and determining a meteorological-equipment feature mapping relation; dynamically correcting the historical power generation power data to obtain a power correction parameter; and performing weight coefficient prediction processing of related continuous time periods on the current generation power data in the thermoelectric solar power generation system to generate future generation power data.

The invention relates to the technical field of electric energy quality treatment, in particular to a collaborative treatment system and method based on multi-class electric energy quality adjustment resources. The system comprises an electric energy quality disturbance generation device, an electric energy quality interference source device, a harmonic current generation device, a line impedance simulation device, a data acquisition device, an electric energy quality diagnosis module and a coordinated scheduling module. According to the invention, independent or coupled simulation of various disturbance types such as voltage sag, harmonic wave, imbalance and flicker is supported based on various types of power quality regulation resources, optimal scheduling and cooperative control of various types of regulation resources such as source, network and load are realized, modular design is realized, plug and play and test verification of various treatment devices are supported, and the power quality regulation system is suitable for large-scale popularization and application. Through line impedance simulation and multi-working-condition setting, an actual power grid operation environment is approached, and the system is especially suitable for a high-proportion new energy and power electronic equipment access scene.

The invention discloses a battery pack passive equalization chip and a battery pack, and belongs to the technical field of integrated circuits. The circuit is connected in parallel between the positive and negative ends of a single lead-acid battery of a battery pack, and comprises a configurable register, a reference voltage source, a battery voltage judgment module and an equalizing current generation module, the battery voltage judgment module judges whether the voltage at the two ends of the chip is higher than a set equalization starting threshold value and controls the equalization current generation module to be started; when the voltage is lower than a set equalization closing threshold value, no equalization current is generated; when the equalizing current generation module is started, equalizing current is generated to shunt charging current of the battery, and voltage at two ends is inhibited from continuously rising; and the configurable register controls the battery voltage judgment module to adjust the equalization starting threshold value and the equalization current. The problem of overcharging of the lead-acid battery pack caused by initial capacity deviation of a single lead-acid battery can be solved, and the overall service life of the lead-acid battery pack is remarkably prolonged; the integration level is high; the method has the advantages of high monitoring precision and low equalization error.

This disclosure provides a control circuit for automatically switching operating modes, including a current generation circuit, a first current difference circuit, a second current difference circuit, a valley control circuit, a PFM detection circuit, and an oscillator. The current generation circuit converts the control voltage into a first control current and generates a second control current of the same magnitude as the first control current through a first mirror. The first current difference circuit generates a fixed bias current. When the first control current is greater than the fixed bias current, the control circuit operates in a fixed-frequency PWM mode. The second current difference circuit generates a third control current of the same magnitude as the first control current through the first mirror. The valley control circuit adjusts the valley current when the lower transistor is turned on, and controls the frequency of the switching node to decrease by reducing the valley current. When the third control current is less than the fixed bias current, the overcurrent signal of the lower transistor is high, and the control circuit reduces the frequency by decreasing the valley current.

This invention discloses a method and apparatus for testing and analyzing the maximum surge current of SiC MOSFETs based on three-terminal resistance monitoring. By applying a stepped surge current and combining it with online monitoring of the three-terminal resistance, the performance changes of the device under extreme stress can be rapidly evaluated, thereby determining its maximum single surge current withstand capability and failure mode. Specific steps include applying an appropriate gate bias voltage to the SiC MOSFET under test and setting the parameters of the surge current generation circuit. After applying a stepped single surge current, the static resistance values ​​of the gate-source, drain-source, and gate-drain terminals are measured and recorded. By monitoring the changes in resistance values, the magnitude of the maximum single surge current is determined, and the failure mode of the device is identified, clarifying modes such as open circuit, short circuit, leakage, and burnout. This method is not only simple to operate and low in cost, but also provides rapid reliability information for SiC MOSFETs without the need for high-precision instruments.

The application provides a voltage regulating circuit and a battery management system. The voltage regulating circuit comprises: a bias current generation module configured to generate a bias current related to a voltage variation range of a power supply end according to a voltage value of the power supply end; a plurality of current modulation modules, each of which has a first modulation branch and a second modulation branch coupled with each other, each second modulation branch has a preset modulation coefficient, and the first modulation branch and the second modulation branch are configured to modulate a difference between a first current input to the first modulation branch and a second current output to a next current modulation module from the second modulation branch according to the preset modulation coefficient when the bias current varies, so as to generate a modulation current on the second modulation branch, and the bias current is input to the first modulation branch of the first current modulation module; and a voltage generation module configured to adjust a reference current to generate an output voltage. The above technical solution can improve the stability of the output voltage.

This invention discloses a constant-time soft-start circuit and method for power transistors independent of input voltage. It includes a power transistor NM1, a soft-start current generation circuit, a current mirror circuit, a soft-start capacitor Cs, and a soft-start loop. The drain of power transistor NM1 is connected to the input signal VIN, and the source of power transistor NM1 generates an output signal VOUT. The soft-start current generation circuit generates a soft-start current Is1. The current mirror circuit replicates the soft-start current Is1 and charges the soft-start capacitor Cs to generate a ramp signal V2. The gate of power transistor NM1 is connected to a signal VG. The soft-start loop clamps the voltage divider signal V1 of signal VG to follow the ramp signal V2. This invention uses a negative feedback loop to control the gate voltage of the power transistor to follow a ramp signal that varies with the input voltage, decoupling the soft-start time from the input voltage, ultimately achieving a constant-time soft-start of the power transistor independent of the input voltage.

The present technology improves uniformity of driving of a driver circuit. A solid-state imaging device includes a pixel array unit, a current generation unit, and a current-driven unit. In the pixel array unit, pixels are arranged in a matrix in a row direction and a column direction. The current generation unit generates a current. The current-driven unit is driven with a divided current resulting from dividing the current generated by the current generation unit to generate a drive signal for the pixels on the basis of a control signal. A voltage-driven unit that is supplied with a second power supply voltage different from a first power supply voltage supplied to the current generation unit to generate a drive signal for the pixels on the basis of the control signal may be further provided.

To provide a current generation circuit capable of improving the accuracy of a current value.SOLUTION: The current generation circuit includes a first current mirror circuit that generates a second current obtained by subtracting a first current from an input current, a second current mirror circuit that generates a third current obtained by subtracting the second current from the input current, and an output terminal that outputs the third current.SELECTED DRAWING: Figure 2

The application discloses a method and system for quantitatively analyzing self-insulation resistance shunt effect of a self-powered detector, and the design steps are as follows: a circuit model of the self-powered detector is established according to a working principle of the detector; specific parameters of each element in the circuit are calculated according to geometric structure and physical parameters of the detector; a state space equation in a matrix form is established according to a current generation mechanism of the self-powered detector in a radiation field and the circuit model, and a system state transition matrix of the self-powered detector system is established by solving a matrix index; and influences of geometric dimensions and physical parameters of the detector on the insulation resistance and the shunt effect thereof are analyzed according to the system state transition matrix. The method can quantitatively calculate the shunt effect of the insulation layer resistance of the self-powered detector with different structures and parameters, and can accurately calculate a change of a capacitive current with time, thereby providing guidance for design and application of the detector.

The invention discloses a current protection test method, device and system, electronic equipment and a storage medium. The first feedback information corresponding to the tripping signal grabbed by the data acquisition device and the second feedback information corresponding to the notification signal of the current generation device are acquired to obtain the tripping time of the to-be-tested device, and then the current protection test is automatically completed based on the comparison result of the tripping time and the set time range. Therefore, the labor cost is reduced, and errors caused by manual testing are reduced. Meanwhile, the tripping time is judged according to the feedback information related to the to-be-tested equipment, automatic testing of current protection can be completed without multiple times of physical switching-on operation, and the accuracy and efficiency of current protection testing are improved.

The invention relates to a device for improving the through-flow arc control of a high-voltage large-capacity gas gap switch, and the device comprises a test cavity which is used for providing a controllable gas insulation environment and serves as a carrier of a high-voltage large-current discharge test; the trigger discharge loop is used for generating a high-voltage pulse to drive the trigger cavity to generate plasma jet and induce the main gap to be broken down and conducted at a preset moment; and the large current generation loop is used for storing energy and generating a high-energy fault current simulating an actual working condition after the main gap is conducted. A main gap can form a stable and controllable initial discharge channel under high-voltage and large-gap conditions, active constraint is carried out on an arc movement track in a high-energy fault current flowing stage, and long-term residence of an arc root in a local area of an electrode is avoided, so that the ablation degree of the electrode is remarkably reduced, the through-flow life is prolonged, and meanwhile, the service life of the electrode is prolonged. A transverse magnetic field generated by the spiral groove structure enables an electric arc to rotate along the surface of the electrode, the stability of an arc column is effectively improved, and the reliability under the condition of large current flow is improved.

The application discloses a current source inverter high-speed permanent magnet synchronous motor control method and system based on LADRC, and the system part comprises a position estimation module, a rotating speed regulator, a current sensor, a voltage sensor, a coordinate transformation matrix, a current regulator, a current generation module and a space vector pulse width modulation module; the control method part calculates an inverter current reference value through design of a second-order LADRC current regulator, realizes d-q axis decoupling in the regulator, improves the dynamic performance of the current source inverter, effectively reduces current harmonics, and improves the anti-interference ability and robustness of the system. The application can not only solve the system instability problem caused by high control order and serious coupling of the motor under high-speed working conditions, improve the robustness and dynamic performance of the system, but also solve the problems of high cost and low reliability of the traditional position sensor under high-speed operation, reduce the hardware cost of the system, and speed up the response speed. The application relates to motor control technology.

The present application provides a method and system for detecting the penetration state, an electronic device, and a storage medium, which belong to the field of magnetron arc welding technology. The method includes: performing a welding operation on a target object through an electric welding arc to form a target molten pool; obtaining current generation constraints; generating an alternating pulse current according to the current generation constraints; wherein the alternating pulse current is used to control the shape of the electric welding arc; generating a magnetic field acting on the electric welding arc through the alternating pulse current so that the electric welding arc causes deformation of the target molten pool; after applying the magnetic field to the electric welding arc, collecting the arc voltage corresponding to the electric welding arc; and determining the penetration state of the target molten pool when the arc voltage meets a first preset condition. The present application can improve the accuracy of detecting the penetration state of the molten pool.

The embodiment of the invention provides a ripple compensation device which is suitable for the technical field of electrical control. The ripple compensation device comprises a current generation module and a ripple superposition module, the ripple superposition module comprises a plurality of voltage-controlled current sources, and at least one target voltage-controlled current source exists in the plurality of voltage-controlled current sources. The current generation module obtains output voltage and generates adjusting current according to the output voltage, so that the target voltage-controlled current source generates self transconductance according to the adjusting current, a first transconductance value in linear relation with the output voltage is obtained, and then the ripple superposition module generates ripple signals according to the adjusted target voltage-controlled current source and other voltage-controlled current sources. Therefore, the output voltage of the DC-DC converter is compensated. On the basis, the transimpedance of the target voltage-controlled current source is adjusted, so that the target voltage-controlled current source is linearly changed along with the output voltage, the ripple of the direct current-direct current converter is adaptively compensated, and the stability of a control loop in the direct current-direct current converter under different output voltages is improved.

Methods, systems, and devices for p-type and n-type doping of a backside source for memory channels within an apparatus are described. An apparatus may be formed with both an n-type doped region and a p-type doped region coupled with a backside source. The two doped regions may support current generation for both erase and program operations, providing for reliable and efficient memory access operations. The doped regions may be separated from one another by the plug that protects the memory cells and other regions of the apparatus from diffusion during a backside source formation process. That is, the conductive plug may be formed and may be doped with opposite charges on opposite ends of the conductive plug before a backside source is subsequently formed and coupled with the two doped regions. The opposite ends of the conductive plug may be doped with opposite charges.

The invention belongs to the technical field of integrated circuits, and particularly relates to a positive temperature coefficient current generating circuit with process compensation. The circuit comprises a symmetric positive temperature coefficient current generating circuit or a complementary positive temperature coefficient current generating circuit. The symmetrical positive temperature coefficient current generation circuit comprises two positive temperature coefficient sub-current generation circuits; wherein one sub-current generating circuit comprises a positive temperature coefficient current biasing circuit with NMOS (N-channel metal oxide semiconductor) process characteristics, a first operational amplifier circuit and a first current mirror circuit; the other sub-current generating circuit comprises a positive temperature coefficient current biasing circuit with PMOS (P-channel Metal Oxide Semiconductor) process characteristics, a second operational amplifier circuit and a second current mirror circuit; the complementary positive temperature coefficient current generating circuit comprises a positive temperature coefficient current biasing circuit with dual-process characteristics, a third operational amplifier circuit and a third current mirror circuit; according to the invention, the asymmetry of a temperature curve caused by the asymmetry of a process corner can be effectively compensated while the positive temperature coefficient current is generated, so that the device has a good application prospect.

The invention discloses a dual-frequency dual-channel synchronous current generation method and device, and belongs to the field of electrical equipment and electrical engineering, and the method comprises the following steps: converting hexadecimal information needing to be sent into binary information through a main control unit; the main control unit performs frequency shift keying modulation on the binary information aiming at the two communication frequency bands to obtain two paths of modulation signals; mixing the two paths of modulation signals, outputting one path of pulse width modulation signal with a dual-frequency characteristic, carrying out direct current isolation and high voltage isolation processing on the pulse width modulation signal, and outputting the pulse width modulation signal to a metal oxide semiconductor field effect transistor; and the metal oxide semiconductor field effect transistor carries out resistor switching to generate characteristic current. The method can effectively resist the single-frequency interference problem, reduce the active heating value, support long-time injection without over-temperature protection, and can effectively resist the power-frequency interference.

This invention discloses a phase-locked loop-free self-synchronizing unified grid-connected inverter system, consisting of a circuit module and a control module. The control module obtains various detection signals from the circuit module through measurement, including the voltage and grid-connected current at the inverter's PCC, the grid-side voltage, and the inverter-side inductor current. These signals, along with preset inverter output active and reactive power commands, serve as inputs. The system then passes through a self-synchronization control loop, a reference current generation loop, a compensation current generation loop, a pre-synchronization current generation loop, a fault ride-through control loop, and a voltage amplitude error compensation loop to output a modulated inverter voltage. This achieves phase-locked loop-free self-synchronizing unified control of the grid-connected inverter system under multiple operating conditions. This invention eliminates the need for a dedicated phase-locked loop to establish the inverter output voltage, providing power dispatch and voltage support capabilities. It adapts to various operating conditions, including normal off-grid / grid connection and fault conditions, and operates intelligently and autonomously. It is suitable for grid-connected applications of new energy grid-connected inverters.

The utility model discloses a high-order temperature compensation band-gap reference circuit which comprises a biasing circuit, a compensation current generating circuit, a starting circuit and a band-gap reference core circuit. The biasing circuit, the compensation current generating circuit, the starting circuit and the band-gap reference core circuit are sequentially connected. The bias circuit is used for generating bias current with a positive temperature coefficient; the compensation current generation circuit is used for generating current with a high-order temperature coefficient; the starting circuit is used for controlling the starting of the band-gap reference core circuit according to the bias current generated by the bias circuit; and the band-gap reference core circuit is used for compensating reference voltage by the current with the high-order temperature coefficient to generate reference voltage with a low temperature coefficient. The output reference voltage VBG has the advantage of low temperature drift in a wide temperature range, and is suitable for a power supply management chip, a digital-to-analog conversion circuit and the like.

The invention discloses an optical scanning device and an image forming apparatus, the optical scanning device includes: a scanning unit in which a plurality of light-emitting element groups in which a plurality of light-emitting elements are arranged in a main scanning direction are arranged so as to face an object to be scanned, and a plurality of light-emitting element groups are arranged in the main scanning direction, scanning by causing each of the light-emitting element groups to emit light based on image information; a driving unit that drives the respective light emitting element groups of the scanning unit in each scanning period; and a discarded current generation unit that generates a discarded current that is supplied from the drive unit during a non-scanning period set between the scanning periods, the discarded current being other than a current supplied to each of the light emitting element groups, and that is capable of controlling the discarded current.

An apparatus comprises a bias current generation circuit configured to generate a bias current, a synapse circuit including a weight register storing a weight value and configured to perform a charge operation based on the input spike signal, the bias current, and the weight value, a membrane capacitor having a potential determined based on the charge operation of the synapse circuit, and a neuron circuit configured to generate an output spike signal based on a comparison between the potential of the membrane capacitor and a threshold potential. The bias current generation circuit comprises a self-correction circuit, and the self-correction circuit comprises a target input spike register storing a value related to a target number of input spikes and is configured to correct the bias current generated by the bias current generation circuit based on the value related to the target number of input spikes.

The invention provides a control circuit capable of automatically switching working modes. The control circuit comprises a current generation circuit, a first current difference circuit, a second current difference circuit, a valley value control circuit, a PFM detection circuit and an oscillator, the current generation circuit converts the control voltage into a first control current, and generates a second control current with the same magnitude as the first control current through the first mirror image; the first current difference circuit generates a fixed bias current, and when the first control current is greater than the fixed bias current, the control circuit works in a PWM mode with a fixed frequency; the second current difference circuit generates third control current with the same size as the first control current through the first mirror image; the valley value control circuit adjusts the valley value current when the lower tube is opened, the frequency of the switch node is controlled to be reduced by reducing the valley value current, and when the third control current is smaller than the fixed bias current, the lower tube overcurrent signal is in a high level, and the control circuit reduces the frequency by reducing the valley value current.

This invention discloses a differential circuit, comprising: an input pair, a first load, an adjustment circuit, a current generation circuit, and a mobility follower circuit. The adjustment circuit includes: a constant transconductance bias circuit, a current generation circuit, and a mobility follower circuit. The constant transconductance bias circuit generates a bias current; the current generation circuit generates a compensation current, including a reference circuit for generating one or more compensation currents or a compensation current generation circuit for generating one or more compensation currents based on the bias current; the mobility follower circuit generates an adjustment current based on the bias current and the compensation current, or generates an adjustment current based on the bias current and the compensation current. According to the differential circuit of this invention, by using the adjustment current as the bias current of the input pair and the calibration input current at the output of the differential circuit, zero-temperature-drift offset voltage can be achieved in the differential circuit, and low offset voltage can be achieved across the entire temperature range.

The invention discloses a low-temperature-drift hysteresis voltage comparator, relates to the technical field of stepping motors, and is used for solving the problem that in the prior art, the hysteresis voltage of a comparator is increased due to large temperature change of a stepping motor driving circuit, and then current control of a stepping motor is affected. Comprising a negative temperature excursion current generation module, a positive temperature excursion current generation module, a zero temperature excursion current generation module, a current operation module and a cross coupling comparison module. The cross-coupling comparison module is used for generating a hysteresis voltage based on a comparison result of the input voltage and the reference voltage; the current operation module performs weighted operation on the current generated by the negative temperature drift current generation module, the positive temperature drift current generation module and the zero temperature drift current generation module, and outputs compensation current; the compensation current is provided to the tail current source of the cross-coupling comparison module and is used for modulating the output impedance of the tail current source so as to compensate the temperature drift of the hysteresis voltage.

The invention provides a DEM-based voltage and current conversion device and method, and the device comprises a current generation module, the current generation module generates a current ISET, and the ISET passes through a DEM module and is inputted to a current amplification module; the current amplification module comprises a plurality of PMOS transistors; the voltage following digital ground module generates a dynamically adjusted digital ground DGND according to the grid voltage of a transistor in the current amplification module; the clock frequency division shift module generates a clock of which the amplitude is in linear relation with the ISET according to the DGND, and controls the DEM module to perform periodic switching; a switch tube in the DEM module performs periodic switching based on a clock, dynamic element matching is performed, a transistor in the periodic switching current amplification module amplifies ISET, and IOUT is output.

The embodiment of the invention discloses a driving circuit and a driving chip, and relates to the technical field of electronic circuits, the driving circuit comprises an operational amplifier module, a sampling and holding module, a current generation module, a first MOS tube and a second MOS tube; a first input end of the operational amplifier module is used for accessing reference voltage, a second input end and an output end of the operational amplifier module are respectively connected with a source electrode and a grid electrode of the first MOS tube through the sampling and holding module, and the current generation module is connected with the first MOS tube and is used for generating driving current; the second MOS tube is turned on and off based on the PWM signal and is used for controlling the output of the driving current; through continuous sampling and holding of the sampling and holding module in the switching period of the second MOS tube, the establishment speed of a feedback loop composed of the operational amplifier module, the current generation module and the first MOS tube can be greatly improved, and the establishment duration of the driving current is greatly shortened.