86 results about "RC circuit" patented technology

The invention discloses a composite voltage generation device and a cable insulation performance evaluation system and method, and relates to the technical field of high-voltage insulation testing. The composite voltage generating device comprises a synchronous controller, a direct current source, an impact source, an IGBT active protection unit and a magnetic isolation coupler, and by means of the excellent characteristics of the IGBT and the magnetic isolation coupler, the superposition time sequence accuracy of direct current and impact voltage is improved, and waveform distortion is reduced. The IGBT active protection unit comprises a first IGBT and a second IGBT, and direct-current voltage polarity switching can be realized through selective conduction of the IGBTs; the RC circuit is connected in parallel between the collector electrode of the first IGBT and the emitter electrode of the second IGBT, reverse current flowing back to the direct current source direction can be discharged through the RC circuit, the risk of energy flowing back is reduced, meanwhile, the magnetic isolation coupler can completely block direct current, and an impact source is protected against the influence of direct current voltage; according to the invention, the authenticity and reliability of cable insulation performance evaluation can be effectively improved.

The present disclosure discloses an electrical discharge circuit. A voltage-dividing circuit performs voltage division on a voltage input terminal. A detection circuit generates a boosted detection signal. A first inverter is coupled to a first voltage feeding terminal and a second inverter input terminal. A second inverter is coupled to a first inverter output terminal and a ground terminal. A capacitor circuit of a RC circuit is coupled to the first voltage feeding terminal through a resistor to be charged to provide electric charges to the inverter input terminals. A first switch circuit is coupled to one of the inverter input terminals and the ground terminal. The boosted detection signal turns on and off the first and the second switch circuits respectively when an ESD input occurs such that a first and a second discharge transistors controlled by the inverter output terminals turn on to discharge the voltage input terminal.

The utility model discloses a power supply module and an SoC chip, and belongs to the field of circuits. The power supply module provided by the utility model comprises a voltage stabilizing diode, a first RC circuit and a first power supply chip, the first power supply chip is provided with an input pin, an enabling pin and an output pin; an input pin of the first power supply chip is connected with the power supply end, an enabling pin of the first power supply chip is connected with the power supply end through the first RC circuit and the voltage stabilizing diode in sequence, and an output pin of the first power supply chip is coupled with the first voltage output end; wherein the positive electrode of the voltage stabilizing diode is connected with the first RC circuit, and the negative electrode of the voltage stabilizing diode is connected with the power supply end.

An electrostatic discharge protection circuit includes an NMOS transistor connected to a supply voltage pin through a first node and connected to a ground pin through a second node, an RC circuit connected in parallel with the NMOS transistor and including a capacitor and a resistor, and a clamping circuit connected in parallel with the resistor of the RC circuit and including a plurality of diodes; and a switch connecting the clamping circuit to a gate node of the NMOS transistor, wherein a number of the plurality of diodes is set based on a breakdown voltage and an operating voltage of an internal circuit to be protected by the ESD protection circuit, and the switch includes a PMOS transistor connecting the gate node of the NMOS transistor to the clamping circuit and a sub-RC circuit connected in parallel with the PMOS transistor and including a sub-capacitor and a sub-resistor.

The invention relates to the technical field of power electronics, and discloses an alternating-current static switch topology with a buffering function and a design method of the alternating-current static switch topology. The alternating-current static switch topology comprises a bridge circuit and a buffer circuit, the buffer circuit comprises a first resistor, a first capacitor and a piezoresistor, the first resistor and the first capacitor are connected in series and then connected to the two ends of the bridge circuit in parallel, and the piezoresistor is connected to the two ends of the bridge circuit in parallel. According to the alternating-current static switch topology, the IGBT transistors of the bridge circuit achieve circuit mu s-level rapid opening and closing switching, and opening and closing rapidity is guaranteed; when the IGBT transistor of the bridge circuit is switched off, the piezoresistor of the buffer circuit and the RC circuit absorb the peak voltage of the IGBT transistor when the large current is switched off, so that the IGBT transistor is prevented from generating relatively high voltage stress due to system inductive reactance, the safe and stable work of the IGBT transistor in the bridge circuit is ensured, and the reliability and the stability of the application of the alternating current static switch are improved.

The present disclosure relates to a battery cell balancing apparatus and method, and a battery management system, and provides a battery cell balancing apparatus and method for balancing a battery cell even when an abnormality has occurred in an internal circuit of a battery management system (BMS). A mechanism can also extend the service life of the battery pack by allowing a balancing function to be used to the maximum within a range in which cell voltage measurement errors can be compensated. To this end, the present disclosure provides a configuration to determine whether an abnormality has occurred in an RC circuit of a BMS based on a cell voltage of a battery cell measured by the RC circuit, and to control a switching time of a balance switch to compensate for a cell voltage measurement error caused by the abnormality in the RC circuit.

The invention relates to the technical field of power electronics, and discloses an alkaline electrolytic cell shutdown discharge circuit which comprises a voltage sampling module, a logic control module, a solid-state switch driving module, a bleeder resistor module and a protection module. The voltage sampling module monitors direct-current high voltage of the electrolytic cell in real time and generates low-voltage signals. The logic control module receives the low-voltage signal, compares preset upper and lower threshold voltages, and generates a control signal or a stop signal. And the solid-state switch driving module amplifies the control signal and drives the power switch device to be switched on. The bleeder resistor module converts electric energy into heat energy for dissipation through a power switch device and a bleeder resistor. The protection module absorbs turn-off surges through a fast recovery diode or an RC circuit to protect the power switch device. The system adopts an all-solid-state device to replace a mechanical relay, avoids arc generation, realizes rapid and controllable discharge through closed-loop control, prolongs the service life of equipment, and is suitable for shutdown discharge requirements of the alkaline electrolytic cell in an industrial environment.

A method for determining whether a touch panel is applicable to a firmware is provided. The method comprising: obtaining a first signal value of a RC circuit corresponding to a reference point on a touch panel by a touch sensitive processing apparatus using mutual capacitance sensing; deploying a test conductive object to the reference point and obtaining a second signal value of the RC circuit by the touch sensitive processing apparatus, wherein the test conductive object and the touch sensitive processing apparatus share a common reference voltage; calculating a test variance ratio according to the first and the second signal values; and determining whether the touch panel is applicable to a range of touch sensing parameters supported by a firmware of the touch sensitive processing apparatus according to the test variation value and a first reference value.

Disconnecting device (30, 30') for a battery comprising several interconnected battery cells (21, 22, 23, 24) and a first and a second power supply connection (18, 19), wherein the disconnecting device (30, 30') comprises a disconnecting element (31), in particular a pyrotechnic disconnecting element (31), with which the battery cells (21, 22, 23, 24) or a part thereof can be disconnected from at least one power supply connection (18, 19) in the event of a short circuit, and wherein the disconnecting device (30, 30') further comprises a passive current- or voltage-controlled release circuit (32) which is connected in parallel to one or more battery cells (21, 22, 23, 24), wherein the release circuit (32) is a current-controlled release circuit and the release element (321) is an RC circuit (C1, R11, R12) with a capacitor (C1) serving as a current source, which is connected in series with at least one series resistor (R11, R12),wherein the triggering circuit (32) further comprises an ignition circuit (33) connected in parallel to a triggering element, which is adapted to trigger upon a predefined voltage drop in one or more of the battery cells (21, 22, 23, 24) and to close the current path to the pyrotechnic isolating element (31), and the ignition circuit (33) comprises at least a fuse resistor (R2) and a thyristor (T1), characterized in that the triggering circuit (32) is a current-controlled triggering circuit and the fuse resistor (R2) is smaller than a series resistor (R11, R12).

The invention provides a down-sampling repetitive controller applied to a three-phase four-leg inverter, and the controller comprises an ADC sampling unit which is used for sampling an output phase voltage and an inductive current of the three-phase four-leg inverter at a switching frequency F (S), and converting the output phase voltage and the inductive current into an alpha beta 0 reference system through Clark transformation; the repetitive control unit is used for subtracting the output phase voltage and the inductive current after the Clark transformation from a reference voltage and a reference current to obtain an error voltage signal and an error current signal, applying the error voltage signal and the error current signal to an RC (Resistance-Capacitance) circuit, and performing down-sampling according to a preset proportion; and performing state feedback control on the output of the RC circuit so as to generate a three-dimensional space vector modulation component to act on the three-phase four-leg inverter. The method has the advantages that (1) a closed-loop system pole is arranged by using a state feedback strategy to stabilize the system, so that LPF does not need to be introduced; and (2) designing an integer phase lead compensator.

The invention discloses a gate oxide layer protection circuit, a chip and electronic equipment, and belongs to the technical field of electronic circuits. Two trigger signals are sent out in response to the voltage of a power rail through a series RC (Resistance-Capacitance) circuit; the series RC circuit responds to the condition that the voltage of the power rail is larger than a preset value, sends a connection trigger signal from a first node to connect the switching circuit, responds to the condition that the voltage of the power rail is smaller than the preset value and peak voltage appears, and sends a disconnection trigger signal from the first node based on the coupling effect of the first capacitor to cause the switching circuit to be disconnected. The first node is a common contact of the first resistor and the first capacitor; the functional circuit is connected with the first power rail, comprises a field effect transistor and is used for executing corresponding functions; the switching circuit responds to the connection trigger signal to connect the grid electrode of the field effect transistor and the second power rail, and responds to the disconnection trigger signal to disconnect the connection between the grid electrode of the field effect transistor and the second power rail; therefore, the reliability of the chip is improved.

The present invention provides a clock signal generator and a frequency trimming method that can trim the clock frequency with high resolution. [Solution] The clock signal generator includes an oscillator circuit and a charge transfer capacitor. The oscillator circuit is configured to generate a clock signal and includes a comparator and a resistor-capacitor (RC) circuit, the RC circuit including a capacitor. The charge transfer capacitor is connected to the RC circuit. The frequency of the clock signal is trimmed by injecting or extracting charge associated with the RC circuit through the charge transfer capacitor.

The utility model discloses a dead zone insertion circuit based on a gate-level circuit, and belongs to the technical field of gate-level circuits. A first input end of a first NAND gate is connected with a first complementary signal; the input end of the first NOT gate is connected with the first input end of the first NAND gate; the first resistance-capacitance circuit is connected with the output end of the first NOT gate through a first resistor; the first input end of the second NAND gate is connected with a second complementary signal, and the second input end of the second NAND gate is connected with the first resistance-capacitance circuit through a second resistor; the input end of the second NOT gate is connected with the first input end of the second NAND gate; the second resistance-capacitance circuit is connected with the output end of the second NOT gate through a third resistor; the first end of the fourth resistor is connected with the second input end of the first NAND gate, and the second end of the fourth resistor is connected between the third resistor and the second resistance-capacitance circuit. The beneficial effects are that through cooperation of the NAND gate, the NOT gate and the resistance-capacitance circuit, the circuit structure is simple, the safety and reliability of circuit work are improved, and the cost is low.

A power supply system of an intelligent processing chip belongs to the technical field of space power supplies. The slow start circuit controls voltage between a source electrode and a grid electrode of an FET tube through a RC circuit of the slow start circuit to achieve the purpose of slow start, and input charging surge current generated at the moment of power-up is reduced; the input filter circuit is used for allowing low-frequency pulse current to flow through and suppressing high-frequency noise interference; the power supply module is used for carrying out DC-DC conversion on the voltage signal; the output filter circuit is used for allowing low-frequency pulse current to flow through and suppressing high-frequency noise interference; the power supply modules and the output filter circuits are in one-to-one correspondence to form multi-path output; the FPGA control and feedback circuit is used for dynamically adjusting interval time of different paths of output voltage according to requirements and carrying out feedback control on amplitudes of the different paths of output voltage; and monitoring the temperature of each group of power supply modules in real time, and performing feedback control on the output power of the power supply modules.

This invention discloses a lightning strike sensor to address the problem of successfully acquiring lightning parameters and implementing the sensor in practical application environments when studying lightning strike parameters. The lightning strike sensor includes a 1.2 / 50μs lightning current amplitude sampling circuit and a time-width sampling circuit constructed based on a general comparator circuit and an RC circuit, connected to the lightning current amplitude sampling circuit. The time-width sampling circuit sequentially includes a wavefront time-width sampling circuit, a half-wave time-width sampling circuit, and a full-wave time-width sampling circuit. Specifically, the lightning current amplitude sampling circuit outputs the amplitude sampling level of the lightning strike waveform; the wavefront time-width sampling circuit acquires the wavefront time of the lightning strike waveform; the half-wave time-width sampling circuit acquires the half-wave time of the lightning strike waveform; and the full-wave time-width sampling circuit acquires the full-wave time of the lightning strike waveform. This allows for successful acquisition of lightning parameters and implementation in practical application environments.

The invention discloses a hardware MPPT (Maximum Power Point Tracking) control device and method for a space power supply, and belongs to the technical field of space power supplies. The hardware MPPT control device comprises a Buck circuit topology and an MTTP control circuit; the MTTP control circuit comprises a peak pickup circuit which picks up the maximum point of the power of the solar cell through charging and discharging of an RC circuit; the MPPT reference circuit is used for keeping the maximum power point of the solar cell and generating a reference signal Vmpp of MPPT; the MPPT modulation circuit is used for modulating Vsa to work on the maximum power of the solar cell by changing the duty ratio of Buck by taking a Vmpp signal representing the maximum power of the solar cell as a reference; the mirror current source sampling circuit is used for copying high-end current output by the solar cell array; and the pulse modulation multiplier realizes the product of the voltage and the current of the solar cell by using an MPPT modulation circuit and a mirror current source sampling circuit.

This utility model relates to the field of general circuit technology, specifically to a stable and anti-interference fast power-on / off RC reset circuit; it includes an RC reset circuit and a MOSFET interlock circuit. The RC reset circuit includes resistors R1 and R2, capacitor C, diode D1, and power supply equivalent impedance RL. The MOSFET interlock circuit includes transistors M1, M2, M3, M4, M5, and I1, where I1 is a logic gate OR gate. The RC reset circuit of this design adds a MOSFET interlock structure to the traditional circuit architecture to generate high and low levels, which are then used by logic gate circuits to generate high and low voltage signals, suppressing reset signal jitter that may be caused by power supply noise or environmental interference. At the same time, the RC reset circuit uses a MOS resistor instead of a traditional resistor and utilizes its own substrate diode as a capacitor discharge diode, which can accelerate the discharge of capacitor C. Furthermore, a resistor discharge branch connected in parallel with capacitor C is added to achieve fast reset of the RC circuit when the power supply is rapidly powered on or off.

The application provides a bus fast-charging station orderly charging method considering battery dynamic charging loss, comprising: determining the power demand meeting bus line operation according to the operation time of the charging station, equipment power limit, quantity limit and bus departure plan; establishing a battery heat loss model and the relationship between charging energy conversion efficiency and the actual charging power of the vehicle-mounted energy storage system based on a first-order RC circuit model; taking the minimum actual power consumption of the charging station in a day or the minimum actual electricity cost of the charging station in a day as an objective function, wherein the battery heat loss is considered, and an optimization model is established with the charging station operation time, charging pile number, charging pile maximum power, power distribution capacity, electric bus travel power demand, electric bus charging time continuity as constraint conditions; using piecewise linearization to convert the nonlinear optimization objective function model into a mixed integer convex programming problem, and solving the mixed integer convex programming problem to obtain the optimal charging plan, including the optimal charging time and corresponding charging power of each vehicle. The method improves the charging energy conversion efficiency, reduces the battery heat loss and prolongs the service life of the battery, reduces the charging cost of the bus while improving the charging energy conversion efficiency, and improves the economy.

The application discloses a radio frequency chip integrated with an RC circuit on a chip, which comprises a substrate, an epitaxial layer, an active region arranged on the epitaxial layer, a plurality of resistance-capacitance combination structures arranged between a gate of the active region and an input metal pad on the epitaxial layer, resistance and capacitance of the resistance-capacitance combination structure being connected in parallel, and the gate of the active region being connected to the input metal pad through the resistance-capacitance combination structure. The radio frequency chip integrated with the RC circuit on the chip integrates the RC circuit in the chip, and the gain and robustness of a radio frequency power device at low and high frequencies are improved.

The application provides a leakage current switching control circuit and a laser treatment instrument, and the circuit comprises a power grid EMC unit, an auxiliary power supply unit, a power grid EMI unit, a sampling comparison unit and a leakage current switching unit; the power grid EMI unit comprises a first RC circuit, a second RC circuit, a third RC circuit and a fourth RC circuit; the sampling comparison unit comprises a comparator, and the leakage current switching unit comprises a first relay and a second relay; the comparator outputs a low-level signal to the coils of the first relay and the second relay when an alternating current power supply inputs a first voltage, so that the normally open switches of the first relay and the second relay are kept in a normally open state; the comparator outputs a high-level signal to the coils of the first relay and the second relay when the alternating current power supply inputs a second voltage, so as to control the normally open switches of the first relay and the second relay to switch to a closed state; and the first voltage is greater than the second voltage. The application can control the leakage current to be unchanged when the input voltage is reduced.

A condition monitoring system for determining the presence of a change in moisture content in a fat. The system includes a sensor electrode disposed within a space in which the grease is located. Suitably, the electrode is a plate having a surface area that generates capacitance C. The resistor R is combined with the resistor R to generate an RC circuit. The system senses the RC circuit. The dielectric constant of the monitored grease varies according to the moisture content of the grease. The change in dielectric constant will change RC, which is then sensed by the system. Analysis of RC changes will determine whether there is a change in the water content level in the monitored fat.

The application discloses a voltage reduction power supply circuit and electronic equipment, and belongs to the technical field of electronic circuits. The voltage reduction power supply circuit comprises a series RC circuit, a power-down circuit and a switch circuit. The series RC circuit comprises a first capacitor component and a first resistor component in series connection. The series RC circuit is connected to an input voltage, and outputs a voltage signal on the first capacitor component according to the input voltage. The power-down circuit is used for discharging the energy on the first capacitor component in response to the input voltage being less than a preset voltage. The switch circuit is connected to the input voltage. The switch circuit converts the input voltage into an output voltage in response to the voltage signal being greater than or equal to a preset value, and disconnects the output voltage in response to the voltage signal being less than the preset value. Therefore, the voltage reduction power supply circuit meets a timing constraint.

The application belongs to the technical field of power semiconductors, and particularly relates to a GaN HEMT power device with a built-in RC circuit. On the basis of ensuring a certain P-GaN layer thickness and changing GaN from depletion mode to enhancement mode by depleting two-dimensional electrons, n-doped GaN and p-doped GaN are reflected between the P-GaN layer and the metallized gate. The intrinsic GaN capacitance and the edge capacitance in the traditional structure are changed. The structure can effectively increase the gate resistance, effectively increase the edge capacitance on the gate-source side and the gate-drain side, form a built-in RC absorber, and effectively solve the problems of loss and efficiency reduction caused by the external RC circuit of GaN. Meanwhile, the GaN device itself has certain EMI resistance.

A hybrid solid-state switching device relates to the field of low-voltage electrical technology and comprises a control module and a body, the body comprises a power supply module, a main control board, a first drive control board, a second drive control board, an isolation switch and two hybrid switches, and the two hybrid switches are sequentially connected with an external power supply in series; the hybrid switch comprises a piezoresistor, a mechanical switch, an insulated gate bipolar transistor and an RC circuit which are connected in parallel; the isolating switch is electrically connected with the first driving control board and is connected in series with any hybrid switch, or is connected in series with an insulated gate bipolar transistor of any hybrid switch and then is connected in parallel with the piezoresistor, the mechanical switch and the RC circuit; the mechanical switch is electrically connected with the second driving control board; the control module is in signal connection with the main control board, the main control board is in signal connection with the first drive control board and the second drive control board, and the power supply module is electrically connected with the main control board, the first drive control board, the second drive control board and a branch where the insulated gate bipolar transistor is located. The device has the characteristics of high on-off speed, no arc generation, low on-state loss and long service life.

An RC circuit 110 is connected in series between VDD and GND. A RC circuit 120 is set with a time constant different from that of the RC circuit 110 connected in series between VDD and GND. In the inverter circuit 210, a potential is input between a resistance element 111 and a capacitance element 112. In the inverter circuit 220, a potential is input between a resistance element 121 and a capacitance element 122. In an NMOS transistor 310, an output of the inverter circuit 210 is input to a gate terminal, and a drain terminal is connected to VDD. In an NMOS transistor 320, an output of the inverter circuit 220 is input to a gate terminal, a drain terminal is connected with a source terminal of the NMOS transistor 310, and a source terminal is connected with GND.

The application discloses a sodium battery equivalent circuit model construction method, a sodium battery power estimation method and a storage medium. The model construction method comprises the following steps: fitting a voltage-power model of a sodium ion battery, wherein the voltage-power model is a two-dimensional mathematical model between the open-circuit voltage and the state of charge of the sodium ion battery; fitting an internal resistance-temperature model of the sodium ion battery, wherein the internal resistance-temperature model is a two-dimensional mathematical model between the ohmic internal resistance and the temperature of the sodium ion battery; and constructing a first-order equivalent circuit model of the battery based on the voltage-power model, the internal resistance-temperature model and preset polarization parameters, wherein the first-order equivalent circuit model comprises an ideal voltage source, an ohmic internal resistance and a resistance-capacitance circuit unit connected in series, and the resistance-capacitance circuit unit is composed of a parallelly-connected polarization resistance and a polarization capacitance.

The invention discloses an electronic buoy constant-brightness circuit, a buoy and a battery electric quantity detection method, the constant-brightness circuit enables an LED lamp in the electronic buoy to be constantly bright, the constant-brightness circuit is provided with a first circuit, a sampling circuit and an RC circuit, a battery in the buoy supplies power to the first circuit, the first circuit generates a PWM signal to be directly connected to an anode of the LED lamp, and the sampling circuit is connected with the RC circuit. The cathode of the LED lamp is connected with the circuit GND through the sampling circuit; the average current of the PWM signal enables the LED lamp to be on constantly, and after the LED lamp is on, a to-be-collected signal is formed at the joint A of the sampling circuit and the LED lamp under the action of the sampling circuit; the signal to be collected is collected by the first circuit through the RC circuit after the time constant tau of the RC circuit is stable. The circuit generates a PWM signal to directly drive the LED lamp, directly obtains the average current flowing through the LED lamp and compares the average current with the preset current so as to adjust the PWM duty ratio, so that the average current of the PWM signal is equal to the preset current, the current is used for driving the LED lamp, and the constant brightness of the LED lamp within a certain time is realized.

This disclosure provides a parameter calibration method, a resistive-capacitive circuit, a traction power supply system, and a train, relating to the field of rail vehicle technology. The parameter calibration method includes: performing spectral analysis on the overvoltage signal of an on-board voltage transformer to obtain multiple oscillation frequency components of the overvoltage signal; based on the suppression effect of the first resistive-capacitive sub-circuit on the multiple oscillation frequency components in the overvoltage signal, determining a first constraint condition between the first resistance value and the first capacitance value of the first resistive-capacitive sub-circuit through network function analysis; based on the first constraint condition, analyzing the influence of the first resistive-capacitive sub-circuit on the electrical characteristics of the on-board voltage transformer to determine the first resistance value and the first capacitance value; and based on the impedance suppression effect of the second resistive-capacitive sub-circuit, determining the second resistance value and the second capacitance value of the second resistive-capacitive sub-circuit through equivalent impedance analysis.

An integrated circuit is disclosed. The integrated circuit comprises an input interface and an optical receiver. The optical receiver includes a photodiode, level shifter, and differential transimpedance amplifier (TIA). The photodiode has a cathode and anode terminal and is configured to receive an optical signal via the input interface. The level shifter includes a parallel RC circuit. The differential TIA has first and second conversion circuits. The first conversion circuit is connected to the cathode terminal and a first output terminal of the optical receiver. The second conversion circuit is connected between the anode terminal and a second output terminal of the optical receiver. The parallel RC circuit is connected between the cathode terminal of the photodiode and the first conversion circuit. The differential TIA is configured to provide a differential voltage signal at the first and second output terminals of the optical receiver based on the optical signal.

The invention provides a selection switch, an on-load voltage regulation decomposition switch and a distribution transformer thereof, and relates to the technical field of on-load voltage regulation of distribution transformers, and the selection switch comprises a first silicon carbide N-type insulated gate bipolar transistor, a first RC circuit, a second RC circuit and a second silicon carbide N-type insulated gate bipolar transistor, the collector electrode of the first silicon carbide N-type insulated gate bipolar transistor, the first end of the first RC circuit, the second end of the second RC circuit and the emitter electrode of the second silicon carbide N-type insulated gate bipolar transistor are connected; the emitter of the first silicon carbide N-type insulated gate bipolar transistor, the second end of the first RC circuit, the first end of the second RC circuit and the collector of the second silicon carbide N-type insulated gate bipolar transistor are connected. According to the invention, arc-light-free switching of the distribution transformer can be realized.