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44results about How to "Reduce transient current" patented technology

Power control system for reducing power to lighting systems

A power control system is disclosed for controlling the power supplied to a lighting system and limiting power during time of peak demands and the like wherein the lighting system includes a power source and a lighting load connected to the power source. The control system comprises a main transformer having a first winding and a second winding, the first winding being connected between the power source and the lighting load. An autotransformer connected to the power source having a plurality of electrical transformer taps with prescribed voltage values. A plurality of solid-state tap switches is connected to the transformer taps and to the second winding of the main transformer to apply the prescribed voltage values across the second winding. A system controller has an input for receiving a voltage change signal representing a selected load voltage to be applied to the lighting load. The controller is connected to the tap switches for selectively closing one of the tap switches to produce said prescribed voltage value across the second winding of the main transformer whereby the selected load voltage is output across the first winding of the main transformer and applied to the lighting load without interruption of the lighting. A transient control circuit is connected across an output of the tap switches for dissipating transient currents during switching of tap switches.
Owner:ASP CORP

Cell discharge overcurrent protection circuit and cell discharge overcurrent protection method

InactiveCN103647323AReduce transient currentLimit discharge energyBatteries circuit arrangementsElectric powerOvercurrentTime delays
The invention discloses a cell discharge overcurrent protection circuit and a cell discharge overcurrent protection method. The overcurrent protection circuit comprises a discharge switch tube, a discharge control module used for detecting discharge current of a cell in real time and a time-delay module used for determining whether overcurrent timeout occurs by comparing time of overcurrent generation with the preset time-delay time. Whether overcurrent occurs is determined by comparing the detected discharge current with a preset threshold, if the overcurrent does not occur, the discharge switch tube is controlled to open; if the overcurrent occurs, and the overcurrent timeout occurs, the discharge switch tube is locked in a turn-off state. Through enforcement of the technical scheme, when a load is connected with the cell, the transient current during cell discharge can be reduced, transient energy during cell discharge is effectively restricted, and safety of the cell is improved.
Owner:HYTERA COMM CORP

Soft start device and method

The invention discloses a soft start device and method. The soft start device and method are suitable for voltage regulators, especially for non-capacitive voltage regulators. According to the device, a power-on current control module is additionally arranged on the basis of an existing voltage regulator circuit, and used for detecting a power connection end and controlling a power tube of a voltage regulator to be conducted and connected to a power supply after a preset time when detecting that power input exists at the power connection end. According to the corresponding method, the power tube is controlled to be conducted and connected to the power supply after the preset time when the power input end is detected. According to the soft start device and method, voltage overshoot and surge current in the fast power-on process from the time when the power supply is turned on to the time when the power tube is connected to the power supply are eliminated, and the circuit is protected.
Owner:NATIONZ TECH INC

Nonvolatile semiconductor storage device and method for operating same

A nonvolatile semiconductor storage device provided with a highly integrated memory cell array wherein consumption current increase caused by a transient current due to potential change of a bit line and a word line is suppressed during shifts among modes of reading, writing and erasing. A two-terminal memory cell is provided with a variable resistance element whose resistance value reversibly changes by pulse application. In the memory cell array (1), a plurality of two-terminal memory cells are arranged in a row direction and a column direction, respectively, and ends on one side of the memory cells on a same row are connected to common word lines (WL1-WLn), and the other ends of the memory cells on a same column are connected to common bit lines (BL1-BLm). While the operation of reading, writing and erasing are performed to a selective memory cell, a common nonselective voltage VWE / 2 is applied to both a nonselective word line and a nonselective bit line not connected to the selective memory cell.
Owner:异基因开发有限责任公司

Shifting register unit and grid drive circuit as well as display device

The invention discloses a shifting register unit and a grid drive circuit as well as a display device. The shifting register unit comprises an input module, a processing module and an output module, wherein the input module is used for inputting a first clock signal, a second clock signal, a frame start signal, a high-voltage signal and a low-voltage signal; the processing module is connected with the input module and comprises a plurality of thin film transistors; the processing module is used for generating grid drive signals according to the first clock signal, the second clock signal and the frame start signal, controlling that the voltage of first nodes formed by the thin film transistors at an evaluation phase of the shifting register unit is lower than a lower level of a power supply signal, controlling second nodes formed by the thin film transistors to be reset, and cutting off a transient direct-current path formed by the input end of the high-voltage signal, the input end of the low-voltage signal and at least one thin film transistor in time; and the output module is connected with the processing module and is used for sending out the grid drive signals generated by the processing module. According to the invention, the transient current is reduced and the power consumption of the shifting register unit is reduced.
Owner:BOE TECH GRP CO LTD

Soft start device and method

ActiveCN103529891AReduce transient currentAvoid voltageElectric variable regulationCapacitanceComputer module
The invention discloses a soft start device and method. The soft start device and method are suitable for voltage regulators, especially for non-capacitive voltage regulators. According to the device, a voltage buildup and speed control module is additionally arranged on the basis of an existing voltage regulator circuit and used for controlling the output voltage of an error amplifier, and therefore the output voltage of the voltage regulator circuit can rise to a stable value at a preset speed in the circuit establishment process. According to the corresponding method, the output voltage of the voltage regulator circuit rises to the stable value at the preset speed. Due to the adoption of the scheme, voltage and current impact caused after a power tube is conducted is avoided, and transient current generated in the establishment process of a loop working point is reduced.
Owner:NATIONZ TECH INC

Method, storage medium and equipment for controlling motor

ActiveCN108809156AReduce transient currentSolve the technical problem of transient current reductionAc motor stoppersElectrical resistance and conductanceThree-phase
The invention relates to a method, a storage medium and equipment for controlling a motor. The method comprises steps as follows: (1) determining a negative voltage component to be applied to an alphaaxis and a beta axis of the motor, wherein the alpha axis and the beta axis are two-phase stationary axes corresponding to three-phase axes of the motor; (2) calculating a PWM (pulse width modulation) signal used for controlling an inverter on the basis of the negative voltage component, wherein the inverter is used for providing three-phase alternating current for the motor; (3) applying the PWMsignal to the inverter; (4) after preset time, performing active short-circuiting operation on the motor. Compared with the prior art, the negative control voltage component is applied to the motor,one virtual resistor is added to a resistor of the motor equivalently, and transient current in an active short-circuiting circuit of the motor is accurately and timely reduced without motor rotor position information.
Owner:TONGJI UNIV

Switching circuit and power supply circuit provided therewith

A high-withstand-voltage normally-on transistor (T1) and a low-withstand-voltage normally-off transistor (T1) are connected in series, and diodes (D1,D2) are provided in reverse parallel to the transistor (T2). A gate terminal of the transistor (T1) is connected to a source terminal of the transistor (T2), and a gate driving circuit (11) that outputs a control signal to a gate terminal of the transistor (T2) is provided. Forward voltage of the diode (D2) is made lower than forward voltage of the diode (D1), and an inductance component of a path connecting nodes (N1) (N3)via the diode (D1) is made greater than an inductance component of a path connecting the nodes (N2) (N3) via the diode (D1). Accordingly, a switching circuit which includes transistors connected in series and in which transient current at a time of turning off is reduced is provided.
Owner:SHARP KK

Level shifter

A level shifter consists of the first set and the second set of circuits. It is featured as forming each set of circuit by a switch circuit and two MOS tubes, connecting source electrode of the second MOS tube to the second power supply, controlling on-off of switch circuit by input signal based on the first power supply and outputting an output signal based on the second power supply by the first MOS tube in the first set circuit after drain electrode of said first MOS tube is phase-inversed.
Owner:VIMICRO CORP

High-conductivity FeSiAl magnetic powder core and preparation method for same

The invention discloses a high-conductivity FeSiAl magnetic powder core and preparation method for the same. The high-conductivity FeSiAl has raw material of FeSiAl aluminum alloy powder particles. The preparation method comprises the following steps of 1) dehumidifying and coating the FeSiAl aluminum alloy powder particles,2) coiling the magnetic core material by a metal soft magnetic belt and heating, 3) preparing a FeSiAl magnetic powder core crude products, 4) preparing a FeSiAl magnetic powder core processed products, and 5) preparing a FeSiAl magnetic powder core products. Compared with the present magnetic core preparation method, large current transient loss can be reduced and transient resistance can be improved; large current instant on-off soft landing can be achieved and electric equipment can be protected; and power supply power factors can be improved.
Owner:JIANGXI AITE MAGNETS +1

Half-cell structure of gate power MOSFET anti-single-particle-burnout device

InactiveCN110610995AImprove anti-SEB performanceReduce in quantitySemiconductor devicesCharge carrierParasitic bipolar transistor
The invention proposes a half-cell structure of a gate power MOSFET anti-single-particle-burnout device. According to the structure, an N-type buffer layer with an N-type local doped region is manufactured in the drain (cathode) electrode region of a semiconductor power device, which can significantly reduce the electric field peak and impact ionization degree of a semiconductor power device driftregion and high and low junctions of a substrate. The number of carriers generated by avalanche multiplication caused by impact ionization can be reduced. The transient current acting on a parasiticbipolar transistor is greatly reduced, so that the parasitic bipolar transistor is difficultly turned on. The device's ability to resist single particle burnout can be improved without sacrificing basic electrical characteristics.
Owner:HANGZHOU DIANZI UNIV

Method for controlling string-type network-forming energy storage converter

The invention discloses a string type network energy storage converter control method, and the method comprises the steps: enabling an energy storage converter to take an SOC mean value as the feedback of an SOC equalization ring, and obtaining an SOC equalization ring output value; superposing the output value of the secondary frequency modulation ring, the output value of the SOC equalization ring and the output value of the primary frequency modulation ring as an active given value, and obtaining a reference value of the frequency through a VSG active frequency control ring; taking the output value of the secondary voltage regulating ring as a reactive given value, obtaining a reference value of a VSG reactive amplitude control ring through the primary voltage regulating ring, and obtaining a reference value of voltage through the amplitude control ring; inputting the obtained reference value of the frequency and the reference value of the voltage into a voltage and current double closed loop to obtain an output signal for following the reference values, and further generating a driving signal for controlling a switching tube of the energy storage converter; according to the invention, the communication load rate can be reduced, when large frequency and voltage fluctuation occurs, the voltage and frequency stability problem can be independently solved, the self-recovery control of secondary regulation is realized, and the frequency and the output voltage of the system are dynamically regulated in real time.
Owner:SHENZHEN SINEXCEL ELECTRIC

Novel amorphous magnetic powder core and preparation method thereof

The invention discloses a preparation method of novel amorphous magnetic powder core. Amorphous alloy powder particles are used as a raw material. The preparation method is characterized by comprising the following steps of 1) pre-processing the amorphous alloy powder particles; 2) performing thermal treatment on a metal soft magnetic strip; 3) preparing a first product of the amorphous magnetic powder core; 4) preparing a processed product of the amorphous magnetic powder core; and 5) preparing the novel amorphous magnetic powder core. The preparation method is used for preparing the magnetic core; and compared with an existing method for preparing the magnetic core, the preparation method has the advantages that the transient loss of a large current is reduced, transient impedance is improved, effects of instantaneous on / off of the large current and soft landing are achieved, power utilization equipment is protected, and a power factor of a power supply is improved.
Owner:JIANGXI AITE MAGNETS +1

Voltage level shifter

A voltage level shifter including a voltage level shifting circuit and a boost circuit is provided. The voltage level shifting circuit includes a first reference input end, a second reference input end, a first boosted input end, and a second boosted input end. The voltage level shifting circuit operates between a first voltage and a second voltage. The boost circuit is coupled to the voltage level shifting circuit. The boost circuit boosts the first boosted input end and the second boosted input end according to voltage values of the first reference input end and the second reference input end to reduce a transient current that flows from the first voltage to the second voltage.
Owner:WINBOND ELECTRONICS CORP

Circuit for lowering CMOS transient power consumption

ActiveCN101795134AWill not affect operationEliminate feedthrough channelsLogic circuits characterised by logic functionCMOSEngineering
The invention relates to a circuit for lowering CMOS transient power consumption, comprising a CMOS gate circuit composed of a PMOS transistor and an NMOS transistor, wherein the source electrode of the NMOS transistor is accessed to a power supply level; a barrier device is inserted between a base electrode and a power supply of the PMOS transistor of the pull-up network of a gate circuit to isolate the base electrode from the power supply end; and a voltage regulator is added on the base electrode to enable the voltage value of the base electrode to be constant in a certain range. Thus, in the process of switching input signals of the gate circuit, feed-through current flowing from the power supply to an input end via the base electrode is avoided, thus lowering transient power consumption of a CMOS integrated circuit, and ensuring the base electrode level to be unchangeable without influencing operation of the logic gate circuit due to the voltage regulator.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI

Logic device with low EMI

ActiveUS20060244477A1Reduce transient currentReduce interfacePulse automatic controlCurrent/voltage measurementEmbedded systemVoltage swing
A logic device with low electromagnetic interference. The logic device includes a digital logic gate, a voltage-limited circuit and a current-limited circuit. The digital logic gate provides a corresponding digital logic function. The voltage-limited circuit is connected to the digital logic gate in order to provide a fixed voltage to the digital logic gate to thus reduce an output voltage swing of the digital logic gate. The current-limited circuit is connected to the digital logic gate in order to provide a fixed current to the digital logic gate to thus reduce a transient current of the digital logic gate. Accordingly, an electromagnetic interface (EMI) caused by switching of the digital logic gate is reduced with the reduced output voltage swing and transient current.
Owner:XIAMEN XM PLUS TECH LTD

A soft start device and method

The invention discloses a soft start device and method, which are suitable for voltage regulators, especially capacitorless voltage regulators. The device adds a power-on current control module on the basis of the existing voltage regulator circuit. The power-on current control module is used to detect the power input end, and when it is detected that the power input end has a power input, control the voltage The power tube of the regulator is turned on and connected to the power supply after a predetermined time; the corresponding method is to control the power tube to be connected to the power supply after a predetermined time after detecting the power access terminal; the device and method are The period from power on to power tube access to power supply eliminates voltage overshoot and surge current during fast power-on, and protects the circuit.
Owner:NATIONZ TECH INC

Synchronous motor parameter test and measurement method

The invention discloses a synchronous motor parameter test and measurement method. The method comprises steps: when the motor is stationary and an excitation winding is short-circuited, the same DC step voltage signals are applied between different two phases of an armature end in turn, the armature current of the motor during a transient process is recorded, and corresponding armature current response signals are acquired; motor d-axis and q-axis DC step voltage signals are used to obtain the time domain general solution form of the armature current response of a rotor at any position; the time domain general solution form of the armature current response is used to fit the acquired armature current response signals, and the fit armature current response signals are converted to a frequency domain expression; and according to the frequency domain expression of each armature current response signal and the DC step voltage signal, the impedance expression of each frequency domain of themotor, motor d-axis and q-axis frequency domain operation inductance and each-step inductance and time constant are calculated. All parameters in the d and q-axis equivalent circuit of the synchronous motor can be measured simultaneously under the operation without rotor positioning.
Owner:HUAZHONG UNIV OF SCI & TECH

Rectifier circuit, power supply device, and rectifier circuit drive method

A transient current in a rectifier circuit is effectively reduced. In a rectifier circuit, a first rectifier is provided between a first terminal and a second terminal. In the rectifier circuit, when a switch element is turned ON, a primary winding current flows from a power supply to a primary winding of a transformer. When the switch element is turned OFF, a second rectifier current flows from a secondary winding of the transformer to a second rectifier. During a period in which the second rectifier current is flowing, a reverse voltage is applied between the first terminal and the second terminal.
Owner:SHARP KK

Bus sensor

A bus sensor comprises a main power supply (1), a core power supply (3), an auxiliary power supply (4), a communication power supply (5), a core processing circuit (6), a display circuit (7), a sensing module circuit (8) and a communication circuit (9), wherein the main power supply (1) supplies power to the core power supply (3), the auxiliary power supply (4) and the communication power supply (5), the core power supply (3) maintains continuous power supply, the core power supply (3) is connected with the core processing circuit (6), and the core processing circuit (6) enters a dormant statewhen not working. According to the invention, independent power supply control is added to other parts of the sensors except the core circuit, so that the sensors are powered off, and the transient current when the plurality of sensors are powered on and started is reduced by starting the sensors in a time-sharing manner, so that the number of the sensors connected with the bus can be increased.
Owner:TIANDI SCI & TECH CO LTD

Fet-bipolar transistor combination

The invention relates to FET-bipolar transistor combination. A transistor switch device is provided that exhibits relatively good voltage capability and relatively easy drive requirements to turn the device on and off. This can reduce transient drive current flows that may perturb other components.
Owner:ANALOG DEVICES INT UNLTD

FET-bipolar transistor combination

The present disclosure relates to FET-bipolar transistor combinations. A transistor switching device is provided which exhibits relatively good voltage capability and relatively easy drive requirements to turn the device on and off. This reduces transient drive currents that can upset other components.
Owner:ANALOG DEVICES INT UNLTD

A kind of power device anti-single particle burnout reinforcement structure and preparation method

The invention discloses a power device anti-single event burning reinforced structure electrode and a preparation method thereof. An N-type multi-buffer layer structure is arranged in the drain electrode region of a semiconductor power device; a groove is formed at the source electrode and the neck region electrode and A metal electrode is formed; an integrated transistor is arranged under the neck region; an N-type field stop layer is arranged between the P-type body region and the drift region. Adopting the technical scheme of the present invention can greatly reduce the electric field peak value and impact ionization at the drift region of the semiconductor power device and the substrate homojunction, and reduce the number of carriers generated by the avalanche multiplication caused by the impact ionization; The current density is greatly reduced, thereby reducing the heat generated by the thermal effect of the current, and the SEB safe working voltage of the device is significantly improved.
Owner:HANGZHOU DIANZI UNIV +1

Level shifter

A level shifter consists of the first set and the second set of circuits. It is featured as forming each set of circuit by a switch circuit and two MOS tubes, connecting source electrode of the second MOS tube to the second power supply, controlling on-off of switch circuit by input signal based on the first power supply and outputting an output signal based on the second power supply by the first MOS tube in the first set circuit after drain electrode of said first MOS tube is phase-inversed.
Owner:VIMICRO CORP

Pixel circuit, driving method thereof and display panel

The invention discloses a pixel circuit and a driving method thereof and a display panel, the pixel circuit comprises a light emitting control module, a first current control module, a second current control module and a light emitting module, and the light emitting control module is used for driving the light emitting module to emit light; the first current control module and the second current control module are connected to a first node, the first node is connected with the control end of the light emitting control module, and the first current control module and the second current control module are respectively used for simultaneously controlling the potential of the first node according to control signals accessed by the control ends of the first current control module and the second current control module. Therefore, the light-emitting time of the light-emitting module is controlled. According to the scheme, after a row of pixel circuits finish data writing, the corresponding pixels of the row can be controlled to emit light, the light emitting time is controlled through the potential of the first node, the situation that after all the pixel rows are finished, the pixels can emit light after data writing is not needed, the time that the pixels do not emit light is greatly shortened, the display brightness is improved, and the display effect is improved. The display effect is improved.
Owner:CHENGDU VISTAR OPTEOLECTRONICS CO LTD

Micro-power consumption level flip circuit and method for reducing transient current in circuit

ActiveCN114070297BReduce transient currentAchieving MicropowerPower reduction in field effect transistorsPower reduction by control/clock signal
The present invention discloses a micro-power level flipping circuit and a method for reducing transient current in the circuit. The level flipping circuit includes: a bias voltage generating module connected to a power supply end to provide a bias voltage according to an input voltage; an output module connected to the bias voltage generating module to receive the bias voltage and generate an output voltage and a feedback voltage according to the bias voltage; and a current source module connected between the power supply end and the output module or between the output module and a ground terminal to provide a protection current to limit the short-circuit current when a short circuit occurs in the output module, wherein the level state of the output voltage is flipped when the voltage value of the input voltage changes and changes to exceed a threshold value. The present invention can reduce the short-circuit current in the circuit when the circuit has a voltage flip, and realize the micro-power operation of the circuit.
Owner:SG MICRO CORP

High withstand voltage power semiconductor device on-line voltage drop measurement circuit and system

The present invention provides a high withstand voltage on-line measurement circuit and system for the conduction voltage drop of power semiconductor devices, including a withstand voltage circuit and a clamping circuit, one end of the withstand voltage circuit is connected to one end of the clamping circuit, the withstand voltage circuit and the The other end of the clamping circuit is respectively connected to any one of the two ends of the power semiconductor device under test. The withstand voltage circuit is composed of several withstand voltage units and a current limiting circuit. The two ends of the clamping circuit are the output terminals of the measuring circuit. The clamping voltage of the bit circuit is higher than the turn-on voltage drop of the power semiconductor device under test. When the power semiconductor device under test is turned off, the clamp circuit plays a clamping role; when the power semiconductor device under test is turned on, the clamp circuit The clamping effect fails. The present invention realizes the substantial improvement of the withstand voltage level of the measurement circuit through the series voltage division of multiple withstand voltage units, and can improve the transient performance of the measurement system by adjusting the device parameters in the current limiting circuit and the clamping circuit, and the measurement is accurate and applicable. wide and low cost.
Owner:SHANGHAI JIAOTONG UNIV

Rectifier circuit, power source device, and method for driving rectifier circuit

The objective of the present invention is to reduce a transient current effectively in a rectifier circuit. In a rectifier circuit (1), a first rectifying element (FR1) is provided between a first terminal (FT1) and a second terminal (ST1). In the rectifier circuit (1), a primary winding current flows from a power source (TP1) through a primary winding (PW1) of a transformer (TR1) when a switch element (TT1) is turned on. When the switch element (TT1) is turned off, a second rectifying element current flows from a secondary winding (SW1) of the transformer (TR1) through a second rectifying element (SR1). By causing the second rectifying element current to flow, a first reverse voltage, which is an instantaneous reverse voltage, is applied between the first terminal (FT1) and the second terminal (ST1).
Owner:SHARP KK

A soft start device and method

The invention discloses a soft start device and method. The soft start device and method are suitable for voltage regulators, especially for non-capacitive voltage regulators. According to the device, a voltage buildup and speed control module is additionally arranged on the basis of an existing voltage regulator circuit and used for controlling the output voltage of an error amplifier, and therefore the output voltage of the voltage regulator circuit can rise to a stable value at a preset speed in the circuit establishment process. According to the corresponding method, the output voltage of the voltage regulator circuit rises to the stable value at the preset speed. Due to the adoption of the scheme, voltage and current impact caused after a power tube is conducted is avoided, and transient current generated in the establishment process of a loop working point is reduced.
Owner:NATIONZ TECH INC

CAM circuit structure with low power consumption and high capacity

PendingCN113971974AReduces instantaneous high current requirementsTransient high power consumption reductionDigital storageHemt circuitsCam
The invention provides a CAM circuit structure with low power consumption and high capacity. The existing CAM circuit structure is changed, the working process of the large-capacity CAM is divided into several pipeline stages, searching, addressing and latching are sequentially carried out in a partition mode, finally, all addressing results are coded in a unified mode, and then result addresses are generated and output, so that the transient large power consumption of the CAM is distributed in the multiple pipeline stages, and the instantaneous high current requirement on a chip power supply network is reduced. The structure has important application value in the large-scale low-power SoC using the CAM IP.
Owner:XIAN MICROELECTRONICS TECH INST