244 results about "Capacitor discharge" patented technology

The invention discloses a super-capacitor energy storage boost control electric energy meter high-power load switch circuit and a control method, and relates to the technical field of power systems, and the circuit comprises a charging circuit which comprises a charging branch electrically connected with a voltage-stabilized power supply and a super-capacitor electrically connected with the charging branch; the boost circuit is electrically connected with the output end of the charging circuit and comprises a power supply branch, a boost chip electrically connected with the power supply branch and a voltage division branch; and the driving circuit is electrically connected with the output end of the booster circuit and comprises a driving chip and a load switch electrically connected with the driving chip. According to the method, the occupied area of the circuit board is reduced, the space is saved, the existing super-capacitor is fully utilized, the cost is reduced, the super-capacitor discharges at a high rate, the service life is long, and the reliability is improved.

The invention provides an automatic disassembling and recycling system and method for waste electric energy meters, the system comprises a disassembling line and a PCB panel and further comprises a junction box on the PCB panel, the disassembling line is provided with a disassembling device, the disassembling device comprises a first processing platform and a second processing platform which are arranged on the disassembling line, and the first processing platform and the second processing platform are arranged on the PCB panel. The top end of the first processing platform and the top end of the second processing platform are each provided with an adjusting rail and a machining platform, and each machining platform is provided with a lifting assembly, a positioning assembly, a conversion assembly, a collection assembly, a transfer assembly, an air inlet assembly, an air outlet assembly, a limiting assembly and an output assembly. And the discharged electric energy is collected and used for doing work, and the collected electric energy is used for tapping the capacitor and collecting electrolyte, so that the safety on a disassembly line is greatly improved, and meanwhile, pollution is reduced.

The invention discloses a PFC (Power Factor Correction) circuit suitable for electrode high-voltage discharge. The PFC circuit comprises an EMI (Electro-Magnetic Interference) filtering module, a starting protection module, a PFC power conversion module and a PWM (Pulse-Width Modulation) switch type auxiliary power supply module which are connected in sequence. The EMI filtering module realizes bidirectional suppression of interference, and when the circuit is powered off, the bleeder resistor enables the common mode inductor and the differential mode capacitor to rapidly discharge, so that secondary interference is prevented; according to the PWM switch type auxiliary power supply module, a high-voltage area and a low-voltage area are isolated, and it is guaranteed that the power supply input pin of the control chip U2 / U3 can be within the normal working voltage; according to the invention, the control chip U2 limits the PWM duty ratio of the control chip U3 through the control logic, so that overcurrent protection is realized; when the MOS tube Q1 / Q2 is conducted, the resistor R22 consumes energy generated by discharging of the capacitor C21, meanwhile, resonance between the capacitor C21 and the energy storage inductor L2 is restrained, high-frequency electromagnetic interference is prevented, and electromagnetic compatibility of the whole system is achieved.

Apparatuses, systems, and methods for power factor correction (PFC) converters are provided, including PFC converters driven at optimal efficiencies. An exemplary PFC converter may comprise input circuitry receiving an input voltage, output circuitry providing an output voltage, a boost circuitry electrically coupled to the input circuitry and output circuitry, and a switch. The boost circuitry includes a capacitor. The switch is configured to operate in an on state and an off state and operating in the on-state causes charging of the capacitor and operating in the off-state causes discharging of the capacitor. A PFC converter controller control the switch to change states at a first ratio associated with one or more time periods for the on state and one or more periods for the off state, and the first ratio also associated with a first efficiency threshold associated with the on state.

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 invention relates to a neural function detection and regulation method and system for a magnetic stimulation coil, and the method comprises the steps: driving a capacitor through a control circuit to discharge to a dual-path stimulation coil, and generating a millisecond pulse magnetic field; utilizing the pulsed magnetic field to act on nervous tissue to generate a nerve regulation effect comprising suprathreshold stimulation and subthreshold stimulation; acquiring evoked potential signals generated by stimulation and induction of the pulsed magnetic field in real time; the evoked potential signal is analyzed, and the nerve conduction time and excitation inhibition ratio is calculated; according to the nerve conduction time and the excitement inhibition ratio, a double-path stimulation time sequence and / or a capacitor discharge parameter are / is adjusted, detection and cooperative regulation and control of the nerve function are carried out, and the purposes of real-time detection, quantitative evaluation and self-adaptive precise regulation and control of the nerve function are achieved.

A drive system of an electric vehicle drives, by electric power of a battery, a travel motor including a plurality of phases having a first coil group and a second coil group which include a common teeth portion. The drive system includes: a drive circuit that includes a first inverter which is connected to the first coil group and a second inverter which is connected to the second coil group in each phase of the travel motor; and a control portion that performs a discharging control which causes the first coil group and the second coil group that are in phase to generate a magnetic flux in an opposite direction to each other by controlling at least one of a connection state between the first inverter and the first coil group and a connection state between the second inverter and the second coil group in a state where the battery is electrically separated from a condenser that is connected in parallel between positive and negative electrodes of the battery when there is a discharging request of the condenser.

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 continuous current pulse generation circuit for power device testing and a control method thereof, and relates to the technical field of power electronics, the continuous current pulse generation circuit comprises a power supply, a control unit, a switch unit, an energy storage unit, an inductive load and a current absorption unit; the switch unit comprises a first relay, a second relay, a third relay, n first switches and one second switch; the energy storage unit comprises n capacitors; the control unit is used for respectively controlling the on-off of the first relay, the second relay, the third relay, the n first switches and the n second switches, carrying out different-stage control on each capacitor, and providing continuous current pulse for the test of the power device; the different stages comprise a capacitor charging stage, a capacitor discharging stage according to a time sequence and a capacitor residual charge releasing stage. According to the invention, more real continuous current pulse can be provided for the power device, and the reliability test requirement of the device under the impact of the continuous current pulse is met.

The present invention discloses a control method, device, and apparatus based on a bridge circuit with series switches. Considering that when an auxiliary switch tube of an active voltage clamping circuit is turned on and a clamping capacitor is connected to a target bridge arm, the bridge arm voltage is equal to the sum of the voltage values ​​of the connected clamping capacitors, the present application controls the connection of the clamping capacitors within a dead time before the target bridge arm is turned on. Since the clamping capacitors discharge externally after connection, the greater the voltage of the clamping capacitors, the longer the time they are controlled to be connected to the target bridge arm. First, the voltage balance of each clamping capacitor is ensured. In addition, precisely because the clamping capacitors are connected for different lengths of time, the bridge arm voltage of the target bridge arm decreases in a step-like manner and drops to zero after the dead time ends, thereby reducing electromagnetic interference, reducing the requirements and volume of subsequent filter circuits, and facilitating stable and reliable operation of the circuit.

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.

Circuit embodiments for a switched-capacitor power converter, and / or methods of operation of such a converter, that robustly deal with various startup scenarios, are efficient and low cost, and have quick startup times to steady-state converter operation. Embodiments prevent full charge pump capacitor discharge during shutdown of a converter and / or rebalance charge pump capacitors during a startup period before switching operation by discharging and / or precharging the charge pump capacitors. Embodiments may include a dedicated rebalancer circuit that includes a voltage sensing circuit coupled to an output voltage of a converter, and a balance circuit configured to charge or discharge each charge pump capacitor towards a target steady-state multiple of the output voltage of the converter as a function of an output signal from the voltage sensing circuit indicative of the output voltage. Embodiments prevent or limit current in-rush to a converter during a startup state.

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.

The invention belongs to the technical field of fluid control, and discloses a high-speed electric control valve and a control method thereof, and the valve comprises a tubular valve body, an internal diaphragm, a metal explosion wire adhered to the diaphragm, a connecting electrode and a control circuit. The energy storage circuit module is composed of a high-voltage capacitor and a fast thyristor, when a trigger signal is received, the thyristor is conducted to enable the capacitor to instantly discharge to the explosion wire, the metal wire is gasified to generate shock waves to break down the diaphragm, and microsecond-level high-speed conduction is achieved. The diaphragm is preferably a polyimide film with the thickness of 10-100 microns, the explosion wire is a copper / tungsten wire with the diameter of 0.05-0.5 mm, and the explosion wire is matched with a capacitor with the charging voltage of 200-1000 V and the capacitance value of 10-1000 [mu] F. The control method comprises the steps of diaphragm installation, capacitor charging, triggering signal sending, high-voltage discharging and diaphragm breaking conduction, and reliable operation is ensured by dynamically adjusting charging voltage and adopting an optical fiber / wireless triggering mode. The invention has the characteristics of fast response and strong interference resistance, and is suitable for high pressure difference occasions needing to accurately control the on-off of gas.

The invention discloses a bus capacitor discharge control circuit and method, a controller and an electric vehicle. The bus capacitor discharge control circuit comprises a battery power supply, a bus capacitor, an electric door lock switch, a main control unit and a discharge unit, wherein the battery power supply is electrically connected with the rear-end functional circuit through the electric door lock switch, and the bus capacitor is arranged at the output end of the battery power supply; when the electric door lock switch is enabled, the battery power supply supplies power to the rear-end functional circuit; the main control unit is electrically connected with the bus capacitor, the rear-end functional circuit and the discharge unit and is used for sampling the bus voltage, generating a driving signal according to the bus voltage and sending the driving signal to the discharge unit; and the discharge unit is electrically connected with the bus capacitor and is used for controlling the bus capacitor to discharge according to the driving signal. According to the scheme, a power or switching device does not need to be connected in series to the bus, the bus loss is reduced, meanwhile, low-power-consumption operation of the system and accurate control over discharge can be achieved, and the discharge efficiency and the system safety are improved.

The invention provides a device and a method for probing a grounding point of a transformer iron core clamp, which are used for converting a low-impedance grounding point of a transformer into a high-impedance grounding point by utilizing capacitor discharge large-current impact in a low-impedance grounding state of the transformer iron core clamp. For a high-impedance grounding state of a transformer iron core clamp, partial discharge at a high-impedance grounding point of a transformer is actively excited by power frequency alternating current excitation, and the spatial position of a partial discharge point, namely a grounding fault point, is determined through an acoustic-electric combined positioning method. The problems that an existing conventional detection method cannot locate the position of a multi-point grounding fault point of the transformer iron core clamp, the potential of the fault point of the iron core clamp in the low-impedance grounding state of the transformer is low, partial discharge is weak, and acoustoelectric signals are difficult to collect are solved. When fault point positioning is carried out, a transformer shell does not need to be disassembled, and ultrasonic signals can be easily monitored at the position of a transformer box shell through capacitor impact current excitation and power frequency alternating current excitation.

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 bus capacitor discharging method of a vehicle-mounted power supply, a vehicle and a storage medium, and relates to the technical field of new energy automobiles, and the method comprises the steps: when the vehicle-mounted power supply is in a discharging working state, controlling a switching circuit to disconnect a PFC conversion circuit and an AC voltage end, and enabling one end, away from a rectification unit, of an inductance unit to be in short circuit, a discharge loop is formed; according to the preset control signal, the target switch tube in the rectification unit is conducted, and the bus capacitor is discharged, so that the bus capacitor is effectively controlled to perform the discharging operation without adding devices to the internal PFC conversion circuit structure of the vehicle-mounted power supply, and rapid discharging of the bus capacitor is realized.

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 present invention supplies a necessary and sufficient amount of power at an appropriate timing when supplying power from a capacitor, a battery, or the like at the time of starting of a load.　The present invention is a power assist device that is connected to an output system of an AC generator for driving an engine and supplies assist power to a load, wherein the power assist device comprises a capacitor, a power conversion unit for converting DC power discharged by the capacitor into AC power and generating assist power, and a control unit for controlling the assist power generated by the power conversion unit, and the control unit detects the output frequency of the output system, synchronizes the assist power with the output frequency of the AC generator, detects output variation in the output system due to the load power, and controls the assist power in accordance with the output variation.

Power control device (10), comprising: a first smoothing capacitor (30) configured to smooth the output of a high-voltage battery (1) of a vehicle; a boost converter (40) configured to boost a voltage smoothed by the first smoothing capacitor (30); a second smoothing capacitor (50) configured to smooth the output of the boost converter (40); an inverter unit (60) to which a voltage smoothed by the second smoothing capacitor (50) is input; a gate control unit (80) configured to perform a discharge operation to discharge the first smoothing capacitor (30) and the second smoothing capacitor (50); a backup power supply unit (70A, 70B) connected to the first smoothing capacitor (30) or the second smoothing capacitor (50) and configured to supply power to the gate control unit (80); and an output voltage switching unit (100) configured to adjust the voltage of the backup power supply unit (70A, 70B) during normal operation to be equal to or lower than a voltage supplied to the gate control unit (80) from an auxiliary battery (3), and to switch the voltage of the backup power supply unit (70A, 70B) during discharge operation by the gate control unit (80) to be equal to or higher than the voltage supplied from the auxiliary battery (3).

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 discloses a super capacitor automatic rapid discharge circuit, which comprises a system-on-chip, a super capacitor and a switching circuit, the super capacitor is connected with the system-on-chip, the switching circuit is respectively connected with the system-on-chip and the super capacitor, and the switching circuit comprises a power resistor; wherein when the system-on-chip chip is in a working state, the system-on-chip chip controls the switching circuit to be switched off, so that the super capacitor is disconnected from the power resistor; and when the system-on-chip chip is in a shutdown state, the switching circuit is switched on, so that the super capacitor is communicated with the power resistor. The automatic rapid discharge circuit of the super capacitor is simple in structure, easy to realize, low in manufacturing cost and high in reliability, and can avoid the problem that the discharge of the super capacitor cannot be controlled due to program runaway of the controller.

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.