137 results about "Capacitor discharge" patented technology

Disclosed is a device comprising a housing that comprises components; a cover configured to be positioned on the housing to restrict access to the components when the cover is in the closed position; a capacitor and a fuse, the capacitor and fuse being dimensioned so that the fuse blows when the capacitor discharges through the fuse; a capacitor charging circuit configured to charge the capacitor when the device is powered up; a discharge circuit for discharging the capacitor through the fuse, said discharge circuit comprising a first switch cooperating with a part integral with the cover in order to prevent the discharging of the capacitor when the cover is in the closed position; and to allow the capacitor to discharge through the fuse when the cover is in the open position.

The utility model discloses a low-power-consumption high-efficiency main transformer integrated board for an air-cooled refrigerator, which comprises an X capacitor discharge circuit, a variable-frequency power supply circuit, a bus voltage sampling circuit, a mains supply voltage sampling circuit and an IGBT (Insulated Gate Bipolar Translator) driving circuit, and is characterized in that the X capacitor discharge circuit uses a discharge chip to replace a traditional discharge resistor; the variable-frequency power supply circuit is additionally provided with a variable-frequency power supply switch circuit, the bus and commercial power voltage sampling circuit modifies the resistance value of a divider resistor, and the IGBT driving circuit modifies the resistance value of a resistor. According to the utility model, improvement is made on the basis of a traditional air-cooled refrigerator main transformer integrated plate, the standby power consumption and the operation power consumption of the main transformer integrated plate are reduced, and the low-power-consumption and high-efficiency electric control design is realized.

The invention provides a pulse power module for discharging a super capacitor, which is applied to the field of fusion. The module adopts a double-layer discrete structure and comprises a converter box and a high-voltage box which are arranged on a primary side and are mutually independent, and the high-voltage box is positioned above the converter box and is electrically connected with the converter box to form a main circuit. A water-cooling heat dissipation H-bridge converter unit and a direct-current support capacitor are integrated in the converter box; and an air-cooled radiating direct current circuit breaker and a smoothing reactor are integrated in the high-voltage box. The module is further provided with a double-loop redundant power supply system which adapts to the fusion pulse discharge working condition, electricity is taken from the input side of the high-voltage box and the direct-current bus side of the converter box respectively, and power is reliably supplied to the control unit through a high-voltage optimization strategy. The problems of complex heat dissipation management, unstable power supply, inconvenient maintenance and the like in fusion high-power pulse application are effectively solved, and the reliability and the safety of the system are improved.

This invention discloses a 35kV power grid fault location method based on an improved Prony method, comprising the following steps: After a power grid line fault occurs, the protection device disconnects the circuit breakers at both ends to isolate the faulty line; transient excitation signals generated by capacitor discharge are injected into both ends of the line through the fault location module, and multiple data acquisition units simultaneously record the damped oscillating current signal to obtain two sets of multi-measurement point time series data; the improved Prony algorithm combined with symplectic geometric mode decomposition is used to process the data, and after phase space reconstruction and signal denoising, characteristic parameters such as attenuation coefficient and angular frequency are identified; the characteristic parameters are substituted into the equations of the line fault physical model to solve the problem, and the location result is output after statistical correction of the fault distance results at multiple measurement points. This invention equates the fault network to a second-order RLC damped oscillating circuit, and completely eliminates the influence of unknown transition resistance by using the difference method of the two-end measurement data, thereby improving the location accuracy.

The invention discloses a direct-current ship power grid fault flexible ride-through method based on zero-sequence current injection, which belongs to the technical field of direct-current ship power grid fault protection, and comprises the following steps: when a switch fault is detected, positioning the position of a fault switch; calculating the degree of asymmetry of the direct-current voltage according to the output voltage requirement of the inverter; the direct-current voltage asymmetry degree serves as input, the rectifier is controlled through carrier amplitude modulation and zero-sequence component injection, and asymmetric direct-current voltage is output; the method comprises the following steps of: determining locking and conducting switches when different switch faults occur, and controlling an inverter to realize generation of separated alternating-current phase voltage and optimal zero-sequence component injection through two-level carrier modulation according to asymmetric direct-current voltage so as to complete flexible fault ride-through of the frequency converter. By adopting the method, the processes of capacitor discharge, energy feedback and the like in the fault period are adjusted through the control factors, system instability and equipment reverse rotation are prevented, and continuous power supply and operation safety of a ship power grid are guaranteed.

The invention relates to the field of comparators, in particular to a wiring terminal for a comparator and a multi-power-supply high-speed dynamic circuit comparator.The wiring terminal comprises a shell, a socket is formed in one side of the shell, pins are connected to the bottom end of the shell in an inserted mode, and a double-pressing-position locking mechanism is arranged in the shell; the circuit also comprises a pre-amplification circuit, a latch circuit and a power supply voltage boost circuit. According to the wiring terminal, the wire core and the insulating sheath part are pressed through the double pressing blocks respectively, wiring is more stable and reliable, the problem that connection is fragile and vulnerable due to the fact that an existing terminal for high-speed comparator power supply wiring only allows the wire core part to be clamped is effectively solved, the voltage of a latch circuit is increased through the power supply voltage booster circuit, capacitor discharge compensation is achieved, and the wiring quality is improved. Therefore, the positive feedback current is increased, the high positive feedback speed is achieved, high-speed operation is achieved, and meanwhile the low-power-consumption performance of the high-speed dynamic comparator is effectively achieved.

The invention discloses a solid-state power controller resonance mode zero-voltage switching-on method based on variable inductance, belongs to the technical field of power electronic conversion, and aims to solve the problems that when a solid-state power controller is started, the peak stress of a device is large, the heat dissipation requirement is large, and the load adaptability is poor. The circuit comprises a resonant network, a main loop power tube and an auxiliary power tube, wherein the resonant network consists of a variable resonant inductor and a pre-charging capacitor; a variable resonant inductor is used for performing parameter matching on different resistive, inductive and capacitive loads to control a resonant mode to be in a critical damping state, so that a pre-charging capacitor discharges in a fastest non-oscillation manner to realize zero-voltage switching on of a main power tube and zero-current switching on and off of an auxiliary power tube; a resonant cavity energy recovery device is arranged to transmit resonant energy to a load. The circuit significantly reduces peak stress when a main loop device is started, reduces switching loss of an auxiliary loop device, recovers resonance energy to a load end, reduces heat dissipation requirements, adapts to load scenes with different properties, and is suitable for the field of high power and high reliability.

This invention discloses a hydrogen-based electrical discharge machining (EDM) system, relating to the field of EDM. The system includes: a contact detection system for detecting the contact state between the electrode and the workpiece and outputting the contact detection signal to the machining control system; a detection switching system for switching between machining and detection modes, receiving switching commands from the machining control system, and connecting the electrode and workpiece to either the contact detection system or the EDM system; and a pulse voltage system for providing low-voltage pulse discharge energy. Compared with existing technologies, the advantages of this invention are: by comprehensively utilizing a special mechanical structure of a dual-slide stage, a rapid switching circuit, hydrogen as a reducing working medium, and low-voltage pulse capacitor discharge technology, this invention systematically solves the four inherent bottlenecks of traditional gas EDM: high voltage dependence, surface oxidation and degradation, servo return error, and process monitoring lag. Ultimately, it achieves high-precision, high-quality, high-efficiency, and inherently safe precision EDM.

Charge pump circuits having a fractional negative voltage output from a positive voltage input. A control circuit provides for feedback control of the output of such a charge pump, and may include dynamic adjustment of the charge pump output based on one or more factors. In some embodiments, two or more charge pumps are coupled in a differential configuration such that while one set of capacitors are in series charging, at least one other set of capacitors is discharging. One embodiment encompasses a fractional negative voltage charge pump including n≥2 capacitors configured to be coupled in series between an input voltage and ground during a charging phase, and in parallel between ground and an output terminal during a discharging phase. The fractional negative voltage charge pump outputs a negative voltage that is no more than 1 / n of a positive voltage input in magnitude.

The invention discloses a converter valve tower with rapid discharge capability and a flexible direct current power transmission system, and relates to the technical field of power systems. The sub-module groups are fixed on each layer of valve tower frame along the horizontal direction, and each sub-module group comprises a plurality of sub-modules which are arranged in parallel; the fluid pipeline is fixed on the valve tower frame; the capacitor discharging device is connected with each sub-module in parallel; and after the operation is stopped, the control mechanism remotely controls and switches the working state of the capacitor discharging device so as to carry out discharging operation on the sub-modules. The operation and maintenance efficiency of the converter valve can be improved, more reliable safety guarantee can be provided for maintenance personnel, and the requirements of an offshore platform converter station on the aspects of easy maintenance, compactness, safety and the like of the converter valve can be met.

The light source circuit of the LIDAR system includes four capacitors, four laser diodes, two charging circuit, four switches, and two drivers. The first driver is configured discharge the first capacitor through the first laser diode by engaging the first switch, and the third capacitor through the third laser diode by engaging the third switch. The second driver is configured to discharge the second capacitor through the second laser diode by engaging the second switch, and the fourth capacitor through the fourth laser diode by engaging the fourth switch. The disclosed light source circuit allows to charge two or more capacitors at once and discharge the capacitors through their respective laser diodes in sequence.

The present application relates to the field of capacitor energy storage, and relates to a method for suppressing impact current of high-power pulse load based on super capacitor energy storage.When a trigger instruction is received by a system load driver, the target power value of the trigger instruction is analyzed to determine the compensation target current, and the advance compensation amount at each time point is determined.When the pulse is started, the voltage deviation between the bus voltage and the rated bus voltage is obtained in real time, the feedback current component at each time point is analyzed, the superimposed compensation component at the corresponding time point is determined in combination with the compensation target current, the upper limit constraint of the superimposed compensation component is set based on the bus voltage change rate and the voltage deviation, the capacitor discharge current given amount is determined based on the upper limit constraint, when the capacitor discharge current decreases to zero, the net difference between the discharge energy and the recoverable energy of the super capacitor within the adjacent pulse period is calculated based on the pulse period and the duty cycle, the charging current given value during the pulse interval is determined, and the impact current is finely suppressed.

The utility model belongs to switching power supply technical field especially relates to a kind of capacitor discharge circuit.This kind of capacitor discharge circuit, by improving discharge topology structure, improve the capacitor discharge efficiency, realized to discharge whole process real-time monitoring and dynamic adjustment, with good market prospect.A kind of capacitor discharge circuit, including have: voltage divider circuit, detection circuit, discharge circuit and main control unit;Voltage divider circuit is formed by the multiple voltage divider resistors of series arrangement;Discharge circuit is formed by main discharge module and assist discharge module;Wherein, main discharge module is formed by the power switch tube and sampling resistance of series arrangement, assist discharge module is formed by the multiple assist discharge resistors of parallel arrangement;Detection circuit includes voltage detection module, current detection module and temperature monitoring module;Main control unit is connected with voltage detection module, current detection module and temperature monitoring module in detection circuit respectively communication.

A system and method for self-capacitance sensing in a touch panel is described. Based on the presence or absence of a local touch event on the touch panel, a self-capacitor exhibits a different detectable capacitance. In a first time phase, embodiments charge the self-capacitor and initialize a ramp bias generator. In a second time phase, embodiments discharge the self-capacitor with a ramp-controlled current source that is biased by the ramp bias generator to generate a discharge current that transitions from a high current at the beginning of the second time phase to a low current at the end of the second time phase. At the end of the second phase, the remaining charge in the self-capacitor depends on the presence or absence of a local touch event. Some embodiments convert the remaining charge to an amplified sense output for readout.

Laser system for surgical applications comprising: a solid-state laser; a pumping lamp for pumping said solid-state laser; a power supply for feeding said pumping lamp; said power supply comprising capacitors; a controller for regulating said power supply; said controller is configurated to control said power supply in order to feeding said pumping lamp with a first voltage and then with a second voltage; and wherein said controller is configurated to discharging said capacitors until reaching the second voltage smaller to said first voltage.

The battery output extension circuit has a switch to supply energy from a first rechargeable battery to charge a capacitor and a second rechargeable battery and then interrupt that supply of energy. The battery output extension circuit has another switch to subsequently enable energy to be discharged from the capacitor to power a load. The sequential charging of the capacitor and the second rechargeable battery, interruption of the charging, and subsequent discharging of the capacitor to power a load is repeatedly performed. A switching configuration can reverse the direction of charging such that the second rechargeable battery supplies the energy to perform a similar repeatedly performed sequential charging of the capacitor and the first rechargeable battery, interruption of the charging, and subsequent discharging of the capacitor to power the load.

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.

This invention relates to the field of molding press technology, and more particularly to a pulsed magnetic field molding press and molding method. The equipment includes a pulsed electromagnet, molding components, and a pulse control circuit, etc. A high-intensity pulsed magnetic field is generated by capacitor discharge to achieve rapid orientation of magnetic powder. Compared with traditional DC magnetic field molding, this invention can significantly shorten the charging and demagnetizing time and improve pressing efficiency. The mold uses a combination of magnetic and non-magnetic materials to optimize the magnetic field distribution. Demagnetization is achieved through reverse pulses, avoiding the influence of residual magnetism. This invention is suitable for one-time molding of magnets with a single unit weight ≤300g, simplifying the process and improving production efficiency and product quality.

The present invention relates to a method for producing a battery cell contact and to a battery cell comprising a battery cell contact produced according to the method. In the method for producing a battery cell contact (10), a battery cell housing element (2) with an opening (60), a connecting element (30) for producing an electrically conductive connection with an electrode, and at least one contact element (20) for realizing an electrically conductive interface are provided. The connecting element (30) is inserted into the opening (60) along an insertion direction (61) so that it passes through the opening (60), and the contact element (20) is welded to the connecting element (30) by means of a capacitor discharge welding process, thereby producing an electrically conductive connection from the contact element (20) to the connecting element (30) that passes through the opening (60) of the battery cell housing element (2). The proposed method for producing a battery cell contact and the battery cell comprising a battery cell contact produced according to the method provide solutions for the design of a battery cell that offer a reliable contacting option for an electrode in a simple, cost-effective and space-saving manner.

The invention belongs to the field of digital-analog hybrid circuits, and particularly provides a digital to time converter (DTC) circuit with high linearity and low noise, which is used for overcoming the rigidity compromise between the linearity and the thermal noise of a traditional resistor-capacitor charging and discharging type DTC and realizing the combination of high linearity and low noise. The invention provides a capacitor unit based on a self-pinch-off switch. The capacitor unit can show capacitive performance at the initial stage of capacitor discharging so as to provide DTC delay. In the end stage of capacitor discharge, the output inverter is resistive, so that the linearity of the output inverter is improved, and the noise is reduced. Compared with a traditional structure, the linear degree can be improved by more than six times, and noise can be reduced by 1.4 dB.

The invention relates to a gas charged ion concentration sensor which comprises a capacitor, an electrode and a microcontroller, the microcontroller is connected with the power supply and the capacitor; the microcontroller is used for controlling charging of the capacitor; charges are distributed on the surface of the electrode; the capacitor is used for discharging when charges distributed on the surface of the electrode and charged ions in gas are subjected to an electric neutralization reaction; the microcontroller is further used for detecting the voltage of the capacitor at the end of discharging and calculating the reduced charge value of the capacitor in the discharging process so as to determine the concentration of charged ions in the gas. The gas charged ion concentration sensor can realize gas charged ion concentration detection only by adopting the microcontroller, the capacitor and the electrode, and is simple in structure, low in cost, small in size, easy to integrate, high in precision and high in reliability; the device can be widely applied to high-precision measurement of the concentration of the charged ions in the gas under the condition that the charged ions exist in the air.

The invention relates to the technical field of vehicle energy management, and discloses a two-wheeled vehicle hydrogen-electricity hybrid control circuit applying a lithium capacitor, which is characterized in that when a load rapid change and stack voltage fluctuation coexist, a control unit issues enabling after a fuel cell pack completes self-inspection and stack voltage stably reaches a preset voltage threshold value; and when the current is lower than the upper limit, enabling the buck-boost conversion unit to output according to the maximum power of the fuel cell pack, enabling the output power to only flow to the direct current bus and the lithium capacitor connected in parallel through the anti-backflow unit, and when the voltage of the fuel cell pack is reduced to the minimum working threshold value, enabling the buck-boost conversion unit to output according to the maximum power of the fuel cell pack. And the lithium capacitor discharges to the direct current bus to compensate the power gap, so that the direct current bus continuously supplies power to the brushless motor controller, and therefore, the charging current upper limit and the bus power distribution are linked in the same process, and bus sinking and over-limit charging are avoided under single-path power access.

The present application relates to the direct current motor voltage stabilizing control technology, specifically relates to a kind of double battery drive direct current motor voltage stabilizing control system and control method, the system includes controller, and the user input control panel connected with controller, compensation drive circuit, power failure signal detection circuit and drive circuit, also include respectively with drive circuit, compensation drive circuit and power failure signal detection circuit connection direct current motor;Power failure signal detection circuit is connected with compensation drive circuit.This method carries out multiple gear voltage drive to motor, and main battery in double battery is powered to load by drive circuit, and auxiliary battery passes through compensation drive circuit and plays voltage stabilizing effect, constructs threshold voltage and capacitor rising voltage, obtains the parameter required for control by power failure signal detection circuit, and discharge compensation time is obtained by calculation, and voltage compensation is carried out by controller control capacitor discharge.This method effectively solves the interference caused by battery voltage drop on control when portable electric appliance is driven by battery, and auxiliary power supply is rapidly switched to supply energy.

The invention relates to an electronic circuit technology, and discloses a power-off time-delay circuit and a power-off time-delay method of a fan control system, when a power supply module supplies power normally, a key device is supplied with power through a first switching power supply, a charging and discharging unit is charged at the same time, and the power supply starting response time of the key device in a power utilization module is not influenced; when the power supply module supplies power abnormally, the charging and discharging unit discharges the second switching power supply, so that the second switching power supply converts and outputs a proper second voltage to supply power to the key device, thereby realizing a power-off delay function and ensuring that the key device works normally within a certain time. According to the invention, enough delay time can be provided for the system to maintain communication among the control modules, the problem of overvoltage possibly caused by direct use of capacitor discharge is also avoided, and key devices are protected. The invention aims to solve the problem of communication interruption of the fan control system caused by the jitter of the power supply, meet the power-off delay demand of the system, and avoid the influence on the starting response of the system.

The invention provides an ignition control circuit with a data storage function, the ignition control circuit comprises an ignition control circuit and a data storage circuit, the ignition control circuit comprises a sensor signal conditioning circuit, a single-chip microcomputer control circuit, an ignition output circuit and an energy storage power supply circuit, the single-chip microcomputer control circuit receives analog signals output by the sensor signal conditioning circuit and outputs the analog signals to the ignition output circuit; an ignition signal is output to the ignition output circuit, and the energy storage power supply circuit supplies power to the sensor signal conditioning circuit and the single-chip microcomputer control circuit. The data storage chip is integrated in the ignition control circuit, overload data, timing / layer-counting / hole-counting working data and ignition capacitor discharge data are stored in real time through the single chip microcomputer of the ignition control circuit in the working process, the size of the test fuse is reduced, and the reliability of the test fuse is improved. And meanwhile, the problem of low reliability of test data of the existing test fuze is also solved.

The invention discloses a charging and discharging control method and a charging and discharging control system, and belongs to the technical field of switching power supplies. The charging and discharging control method comprises the following steps: acquiring a sawtooth wave signal generated by a target capacitor in a working state; the sawtooth wave signal is used for representing the condition that the voltage of the target capacitor changes along with the time length; in a target charging and discharging period, based on the sawtooth wave signal and a maximum electric signal threshold value, a charging and discharging stage of a target capacitor is determined, and the charging and discharging stage comprises a normal charging stage, a first stage or a normal discharging stage; the first stage comprises a time-delay charging stage and an early-stage discharging stage; and under the condition that the target capacitor discharges, based on the charging and discharging stage, controlling the discharging current of the target capacitor. According to the charge-discharge control method, the discharge current of the target capacitor in the discharge stage can be controlled based on the charge-discharge state of the target capacitor, so that the frequency drift is reduced, and the stability of the system is enhanced.

The application discloses a soft start circuit, comprising: a first capacitor, the first and second ends of which are connected to ground and a power supply voltage through a first current path respectively, and the second end outputs a first voltage; a second capacitor, the first end of which is connected to ground, and the second end of which is connected to ground through a first switch and to the power supply voltage through a second switch and a second current path respectively, and the second end outputs a start voltage; the first voltage outputs a second voltage through an inverter, and the control ends of the first and second switches are connected to the second voltage; when power is on, the first current path charges the first capacitor to make the first voltage rise, before the inverter generates a flip, the second voltage makes the first switch conduct and the second switch cut off, the conduction of the first switch makes the second capacitor discharge completely and makes the start voltage decrease; after the first voltage rises to make the inverter generate a flip, the second voltage makes the first switch cut off and the second switch conduct, and the start voltage gradually rises. The application can make the start voltage discharge completely and then rise during the power-on process.

The invention discloses a capacitor discharging method and system for a radio frequency power amplifier and magnetic resonance equipment, and relates to the technical field of capacitor discharging methods. The invention provides a capacitor discharging method for a radio frequency power amplifier, which comprises the following steps: acquiring a voltage sequence and a current sequence of an energy storage capacitor in a preset time period, and extracting voltage characteristics and current characteristics; predicting a first current value of the energy storage capacitor in the target time window according to the voltage characteristics and the current characteristics; predicting a second current value of the energy storage capacitor in the target time window according to the current resistance value of the adjustable load connected with the energy storage capacitor and the capacitance of the energy storage capacitor based on the physical law of capacitor discharge; performing weighted calculation on the first current value and the second current value to obtain a predicted current value of the energy storage capacitor in the target time window; and adjusting an execution strategy of the adjustable load according to a preset target current fluctuation range, the current real-time voltage and the predicted current value.

The present disclosure provides various cards (e.g., payment cards, identification cards, driver's license cards) that are removably attachable to a portable electronic device. In some aspects, the portable electronic device is configured for reverse wireless charging and includes a device charging coil. The card includes a card charging coil, a capacitor electrically coupled to the card charging coil, and a circuit. The card charging coil can produce a current from magnetic flux generated by the device charging coil. The circuit can cause the capacitor to charge when the card is attached to the portable electronic device and cause the capacitor to discharge upon removal of the card from the portable electronic device.