326 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.

The invention provides a launch stage switchable electromagnetic gun system, which comprises a charging circuit module for converting low-voltage direct current into high-voltage direct current and charging an energy storage module; the energy storage module comprises a first-stage energy storage capacitor and a second-stage energy storage capacitor; the discharging module is used for discharging excess energy; the energy conversion and regulation module is used for realizing energy conversion between the primary energy storage capacitor and the secondary energy storage capacitor; the launching execution module is used for realizing the launching function of the electromagnetic gun by utilizing the energy in the energy storage module; and the control and monitoring module cooperates with the MCU (micro control unit) to realize switching among different states of the system. The energy of each stage of transmitting circuit can be controlled, the adjusting range is larger, the precision is higher, meanwhile, the secondary energy storage capacitor is fully utilized under single-stage transmitting, and the charging and discharging speed is increased.

The invention relates to an equipment power failure prompting method based on FPGA capacitor discharge. The method comprises the following steps: acquiring a preset power failure prompt message through an FPGA message cache module based on an equipment interrupt signal; sending a preset power-down prompt message to a neighbor network element through a preset private network management path by using the discharge time window of the energy storage capacitor; and according to an analysis result of the neighbor network element on the preset power failure prompt message, a far-end power failure alarm is generated, the far-end power failure alarm is reported to the private network management server, and the far-end power failure alarm comprises a power failure network element identifier. According to the method, the alarm message is pre-stored through the FPGA, the capacitor discharge time window is utilized, the alarm message is sent to the neighbor network element through the private channel, and the neighbor network element reports the alarm message to the private network manager, so that a power failure event can be quickly positioned, equipment power failure and optical fiber interruption faults are distinguished, the real-time performance and accuracy of power failure alarm are improved, and the power failure alarm efficiency is improved. And an efficient and low-cost power failure fault positioning solution is provided for communication network equipment.

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.

The utility model discloses a capacitor discharge control circuit, which comprises a delay trigger module, a switch module and a discharge module, and is characterized in that the discharge module is connected with an energy storage capacitor; wherein the delay trigger module is used for receiving a control signal (V signal), and when the control signal lasts for a preset time length, the switch module is controlled to be switched on; and after the switch module is switched on, the discharge module is controlled to discharge the energy storage capacitor. The application of the circuit realizes the improvement of the reliability, completely avoids the competition risk problem caused by the absence of a discharge loop in the energy storage capacitor, and improves the competitiveness of the product.

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.

A display device capable of achieving miniaturization, lower power consumption, and higher image quality is provided. A display device includes a plurality of pixels. The pixels each include a display element and a pixel circuit that controls a voltage supplied to the display element. The pixel circuit includes a capacitor that holds a charge according to the voltage supplied to the display element, a charge / discharge circuit that charges and discharges the capacitor, and a control circuit that controls the charge / discharge circuit. The charge / discharge circuit includes a first switching element that controls charging of the capacitor and a second switching element that controls discharging of the capacitor. The control circuit includes a third switching element that controls on or off of at least one of the first switching element and the second switching element on a basis of at least one of pixel data or a display timing signal.

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 embodiment of the utility model provides a discharging circuit and a discharging device. The discharging circuit comprises a power supply, a first switching circuit, a second switching circuit and a third switching circuit. Wherein the power supply is respectively connected with the first end of the first switching circuit and the first end of the third switching circuit, the second end of the first switching circuit is respectively connected with the second end of the third switching circuit and the first end of the second switching circuit, the second end of the third switching circuit is connected with the first end of the second switching circuit, and the second end of the second switching circuit is grounded. The third end of the first switching circuit is grounded. According to the discharge circuit, when the power supply is shut down, the first switch circuit is not conducted, and the second switch circuit and the third switch circuit are conducted to form a constant current source, so that the capacitor is discharged through the constant current source, and the discharge speed of the capacitor is improved.

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.

A control device (50) is applied to a power conversion device (10, 210, 310, 410) provided with: a series connection body of upper and lower arm elements (QH, QL); auxiliary capacitors (31H, 31L); a series connection body of first and second voltage dividing capacitors (33H, 33L); and a connection circuit including a reactor (32) and auxiliary switches (Q1, Q2). The control device comprises: a main control unit that performs switching control of a main switch that is one of the upper and lower arm elements; and an auxiliary control unit that performs switching control of the auxiliary switches. A voltage dividing capacitor connected in parallel with the main switch via the connection circuit among the first and second voltage dividing capacitors is set as a target capacitor. The auxiliary control unit performs switching control of the auxiliary switches so that a current flows in a direction in which the target capacitor is charged and then a current flows in a direction in which the target capacitor is discharged.

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.

An inverter assembly including a phase-control chamber and a direct current (DC) chamber. The phase-control chamber includes a direct current (DC) link capacitor electrically connected a control circuit board via multiple connectors. The DC chamber includes a ferrite filter fixed to a DC bus bar via a support component.

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.

The utility model discloses a sorting trolley power supply system depending on intermediate frequency power supply and capacitor power supply, which comprises a cross-belt sorting machine, a plurality of sorting trolleys are arranged on the cross-belt sorting machine, and the plurality of sorting trolleys circularly move on a track of the cross-belt sorting machine depending on a linear motor; the sorting trolleys are electric sorting trolleys, the sorting trolleys are powered by an intermediate-frequency power supply device, and the power of the intermediate-frequency power supply device is larger than that of one sorting trolley but smaller than the sum of the power of all the sorting trolleys; the sorting device further comprises at least one medium-frequency power supply picker and at least one capacitor, the capacitor is connected in a power supply loop of the medium-frequency power supply device and the sorting trolleys in parallel, the medium-frequency power supply picker charges the capacitor, and when the sorting trolleys need to act, the capacitor discharges to drive the sorting trolleys to act. According to the utility model, the power of the intermediate-frequency power supply device is reduced, the energy consumption is reduced, and the manufacturing cost and the operation cost are further reduced.

The present invention relates to the technical field of discharge circuit design, and specifically discloses a constant power loss fast output capacitor discharge circuit and method, wherein the discharge circuit is electrically connected to a discharge NMOS tube M1 and a DCDC converter output capacitor, the discharge NMOS tube drain and one end of the output capacitor are electrically connected to the DCDC converter output voltage, and the discharge NMOS tube source and the other end of the output capacitor are electrically connected to the ground, including: an output voltage conversion unit, used to convert the DCDC converter output voltage into a control current; a gate-source voltage control circuit, used to control the gate-source voltage of the discharge NMOS tube based on the control current, so that when the DCDC converter is turned off, the power loss of the discharge NMOS tube remains basically constant. The present invention uses the control current generated by the output voltage conversion unit to control the gate-source voltage of the discharge NMOS tube, so that when the DCDC converter is turned off, the power loss of the discharge NMOS tube remains basically constant.