410 results about "Capacitor discharge" patented technology

The invention provides a method and device for discharging residual charges of an air conditioner and the air conditioner. The air conditioner at least comprises a capacitor charging control circuit, a bus capacitor circuit, a fan driving circuit, a main control chip and a fan load. The discharging method comprises the steps that the main control chip responds to a bus capacitor discharging instruction and outputs a control signal used for controlling a capacitor charging control circuit to be disconnected; and obtaining a capacitor voltage value of a bus capacitor in the bus capacitor circuit, and controlling the fan driving circuit to drive the fan load to work through the obtained capacitor voltage value. According to the invention, rapid and efficient discharge of the bus capacitor can be realized, and the hardware cost and the system complexity are reduced on the premise of not influencing the working efficiency of the air conditioner.

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 discloses a power semiconductor device continuous switch test circuit and method, and relates to the field of power electronics, and the test circuit comprises a current generator which is used for generating a test current; the voltage balance module is used for generating test voltage; the auxiliary module is connected with the current generator and the voltage balance module and is used for providing test voltage and test current required in a continuous switching state for the power semiconductor device T1 to be tested; the capacitor discharging module is used for controlling the magnitude of voltage connected to the two ends of the power semiconductor device T1 to be tested; wherein the voltage balance module comprises a power semiconductor device Tc2 and a capacitor C1; the power semiconductor device Tc2 controls the capacitor C1 to apply voltage to the inductor L in the auxiliary module, and the voltage at the two ends of the inductor L is balanced. According to the application, the continuous switching condition simulation of the power semiconductor device T1 to be tested is met, and voltage and current stress decoupling is realized, so that a voltage source does not need higher voltage stress, and the requirement on a power supply is reduced.

The invention discloses a collaborative configuration method and system for a converter valve sub-module and a bypass switch, and relates to the technical field of flexible direct current transmission. The bypass switch and a reactor unit are connected in series to obtain a bypass circuit; the reactor unit comprises an inductor and a resistor which are connected in series; connecting a bypass circuit to two ends of each sub-module in the converter valve to obtain a cooperative circuit; establishing a transient analysis model of a submodule in the converter valve; performing multi-target constraint on the transient analysis model according to the operation condition of the converter valve, and solving the transient analysis model to obtain a first type selection parameter of the reactor unit; simulating a capacitor discharge working condition and a bypass switch false closing working condition to obtain a second type selection parameter of the reactor unit; and configuring a cooperative circuit of the sub-module in the converter valve by adopting the second type selection parameter. By adopting the embodiment of the invention, the closing current of the bypass switch can be effectively reduced, the rising rate of the short-circuit current when the bypass switch is mistakenly closed is effectively reduced, and the protection success rate 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 coaxial cable sealing assembly for a discharge switch of a high-voltage pulse capacitor. The coaxial cable sealing assembly comprises an inner conductor sealing sleeve, an insulating layer sealing assembly, an outer conductor sealing assembly and a sheath sealing assembly which are used for sealing an inner conductor, an insulating layer, an outer conductor and a sheath of a coaxial cable layer by layer. Through a multi-layer sealing structure, four layers of the coaxial cable are respectively and independently sealed, and a cooling liquid and volatile gas are effectively prevented from leaking through a conductor part, so that the problems of poor air tightness, cooling liquid leakage and the like caused by insufficient air gap sealing of the conductor part of the coaxial cable in the prior art are solved; the operation reliability of the liquid cooling radiator is obviously improved; the sealing assemblies are stably fixed through threaded connection between the pressing rings and the sleeves, meanwhile, the sealing gaskets are arranged in the pressing rings, pressure is applied by rotating the pressing rings, the sealing gaskets are tightly attached to the end faces of the coaxial cables, and efficient and reliable airtight sealing is further guaranteed.

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.

The invention discloses a bootstrapped switching circuit for SAR ADC, which comprises a voltage control unit and a switching tube unit, the voltage control unit comprises a first capacitor and a second capacitor which are connected in parallel, one end of the first capacitor and one end of the second capacitor are both connected with an external power supply, and the other end of the first capacitor and the other end of the second capacitor are both connected with the switching tube unit; the switch tube unit comprises a switch MOS tube, a first MOS tube and a second MOS tube, the grid electrode of the switch MOS tube is connected with the other end of the first capacitor and the other end of the second capacitor, when the capacitors discharge, the voltage of the grid electrode of the switch MOS tube is increased to two times of the voltage of the power supply, the substrate of the switch MOS tube is connected with the drain electrode of the first MOS tube and the source electrode of the second MOS tube, the drain electrode of the second MOS tube is connected with the source electrode of the switch MOS tube, and the grid electrode of the switch MOS tube is connected with the source electrode of the second MOS tube. And the grid electrode is connected with the grid electrode of the switch MOS tube. According to the bootstrapped switching circuit, the electric leakage behavior of the switching MOS tube is prevented, the on resistance of the switching MOS tube is reduced, and the sampling rate of the SAR ADC is increased.

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.

There is provided an inverter system comprising a DC input for connecting to a DC power source. The inverter system comprises a plurality of transistors that are controllable to convert a DC voltage to an AC voltage. The inverter system further comprises a DC link capacitor coupled to the DC input of the inverter system and a discharge controller configured to cause a discharge of energy from the DC link capacitor when the DC power source is disconnected from the DC input of the inverter system. The discharge controller is configured to cause the discharge of energy from the DC link capacitor by turning on at least a first transistor and a second transistor so as to cause a controlled shoot-through of the inverter system. At least one of the first transistor and the second transistor are controlled by the discharge controller to operate in a linear region of operation.

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 relates to capacitor discharge. An inverter system is provided that includes a DC input for connection to a DC power source. The inverter system includes a plurality of transistors that are controllable to convert a DC voltage to an AC voltage. The inverter system also includes a DC link capacitor coupled to a DC input of the inverter system; and a discharge controller configured to cause energy discharge from the DC link capacitor when the DC power supply is disconnected from the inverter system. The discharge controller is configured to cause discharge of energy from the DC link capacitor by turning on at least the first transistor and the second transistor to cause a controlled breakdown of the inverter system. At least one of the first transistor and the second transistor is controlled by the discharge controller to operate in a linear operating region.

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 magnetic confinement hybrid superconductive DC current limiter, which comprises a current limiting unit and a quench protection unit, and is characterized in that the current limiting unit comprises a resistor R and a superconductive coupling coil L2, and the resistor R and the superconductive coupling coil L2 are connected in parallel; the quench protection unit comprises a superconducting coupling coil L1 and a capacitor discharge module, and the superconducting coupling coil L1 and the capacitor discharge module are connected in series to form a series loop; the superconducting coupling coil L2 of the current limiting unit is coupled with the superconducting coupling coil L1 of the quench protection unit. The short-circuit current peak value can be effectively suppressed, the breaking current of the direct-current circuit breaker is reduced, and the reliability of system fault removal is improved.

The present application provides a capacitor discharge control method, device, equipment and storage medium. The method obtains the voltage of a first capacitor and the voltage of a second capacitor respectively to obtain the first voltage and the second voltage; determines the average duty cycle of an electric drive boost charging circuit according to the first voltage and the second voltage; determines the duty cycle adjustment value for capacitor discharge of the first capacitor and the second capacitor according to a preset current relationship, wherein the duty cycle adjustment value is used to adjust the B-phase duty cycle and the C-phase duty cycle in the electric drive boost charging circuit; performs capacitor discharge on the first capacitor and the second capacitor according to the average duty cycle and the duty cycle adjustment value, realizes simultaneous discharge of the first capacitor and the second capacitor, ensures the discharge speed, and controls the current smoothly, reduces the current impact, reduces the cost without adding additional equipment, and improves the safety of the electric drive boost charging circuit.

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.

Provided is a cell balance adjustment method for evening a charge state of a cell 2 in a secondary battery 3. All of the cells 2 constituting the secondary battery 3 are divided into a plurality of processing target groups 4 in a state in which a part of the cell 2 is included in an overlapping manner in the processing target groups 4 adjacent to each other. The method comprises: a capacitor charging step of charging a capacitor 8 by connecting the capacitor 8 to both end portions of the processing target group 4; and a capacitor discharge step of charging a processing target cell by connecting a predetermined processing target cell included in the processing target group 4 and the capacitor 8 and discharging the charge.

There is provided an inverter system comprising a DC input for connecting to a DC power source. The inverter system comprises a plurality of transistors that are controllable to convert a DC voltage to an AC voltage. The inverter system further comprises a DC link capacitor coupled to the DC input of the inverter system and a discharge controller configured to cause a discharge of energy from the DC link capacitor when the DC power source is disconnected from the DC input of the inverter system. The discharge controller is configured to cause the discharge of energy from the DC link capacitor by turning on at least a first transistor and a second transistor so as to cause a controlled shoot-through of the inverter system. At least one of the fist transistor and the second transistor are controlled by the discharge controller to operate in a linear region of operation.

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.