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149 results about "Capacitive discharge" patented technology

Optimisation of control of reactive circuit for generating electromagnetic pulses

Offline prior to operation, an optimised control sequence is derived for a pulse system comprising a reactive circuit for generating electromagnetic pulses, such as a transcranial magnetic stimulation circuit, and cascaded switching modules for switchably connecting capacitive discharge elements to provide a multi-level output voltage for the reactive circuit. A discrete-time model predicts an electrical state of the pulse system. A target profile for an electromagnetic pulse is received. For respective time-steps of the control sequence taken in succession, an optimal path of switching states over a window of time-steps starting with the respective time-step is derived, optimising a cost function having a deviation cost contribution representing deviation of an electrical state of the pulse system predicted by the discrete-time model from the target profile over the window. The switching state of the determined path at the respective time-step is selected for the control sequence.
Owner:OXFORD UNIVERSITY INNOVATION LTD

PFC (Power Factor Correction) circuit suitable for electrode high-voltage discharge

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.
Owner:YINENG ELECTRIC FLAME TECH (SHENZHEN) CO LTD

Magnetic stimulation coil nerve function detection and regulation method and system

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.
Owner:ZHONGKE MEDICAL ELECTRONICS (SHENZHEN) MEDICAL TECH CO LTD

Mechanical direct-current circuit breaker based on variable inductance and method

According to the mechanical direct-current circuit breaker based on the variable inductor and the method, in the circuit breaker, a switch branch comprises a vacuum switch VB and a current sensor which are connected in series; the reverse injection branch is connected in parallel to the two ends of the vacuum switch VB, comprises a pre-charging capacitor, a discharging thyristor, a multi-stage series inductor and a parallel thyristor module, and is selectively connected in series with the multi-stage series inductor according to the detected fault current so as to realize variable inductance; a reverse injection current is formed to realize current zero passage and arc quenching of the VB fracture of the vacuum switch; the energy consumption branch is connected in parallel to two ends of the vacuum switch VB and is used for dissipating residual energy in the loop after the mechanical direct current circuit breaker is switched off; the controller is connected with the current sensor and the thyristors and used for judging the number of inductors needing to be input according to the rise rate and amplitude of fault current and controlling the corresponding thyristors to be switched on, and graded inductor series-in and reverse current injection of the multi-stage series inductors of the variable inductor are achieved.
Owner:XI AN JIAOTONG UNIV +1

Trapezoidal wave current soft switching method of interleaved DC-DC converter

The invention discloses a trapezoidal wave current soft switching method of an interleaving DC-DC converter, which is used for a two-phase interleaving bidirectional DC-DC converter based on a coupling inductor and a multi-phase interleaving converter thereof, and is characterized in that an inductive current adopts a trapezoidal wave mode, so that the converter works in an approximate critical conduction mode; a fixed switching frequency control or hybrid control method is adopted, so that the device can work in a Buck mode and can also work in a Boost mode. The method for realizing the soft switching is characterized in that the parasitic capacitance or the external resonant capacitor of the switching tube is discharged to be zero under the resonance action of the inductor and the capacitor in the dead zone time when the upper bridge arm switch and the lower bridge arm switch are alternately switched on, so that the zero-voltage switching-on of all the switching tubes is realized. And each phase current sharing control is adopted in the multi-phase interleaving parallel topological structure. According to the invention, the problems of large current peak value and high turn-off loss of a traditional triangular wave current mode are solved, the output ripple current is reduced, a soft switching method is provided, the switching loss is reduced, and the conversion efficiency of the converter is improved.
Owner:CHONGQING UNIV

Low-power-consumption high-efficiency main transformer integrated plate for air-cooled refrigerator

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.
Owner:GUANGDONG HOMA REFRIGERATOR CO LTD

Networking SVG super capacitor configuration method, system and device based on direct current side direct-hanging super capacitor, and storage medium

The invention relates to the technical field of energy storage configuration, in particular to a network construction type SVG super capacitor configuration method, system and device based on a direct current side direct-hanging super capacitor and a storage medium. Acquiring grid-connected voltage, target instantaneous active power and continuous discharge time; selecting the specification of a super capacitor monomer, determining a single cluster rated voltage and setting a branch current-limiting threshold value; establishing a single-cluster supercapacitor discharge model, simulating a process from constant-power discharge to a current-limiting threshold value, considering the influence of internal resistance voltage division, calculating single-cluster release energy through power-time integration, and obtaining single-cluster constant discharge power; calculating the number of super capacitor clusters; the number of parallel branches and the number of series clusters are determined by combining the topological direct-current side voltage range of the MMC, and the direct-current side rated voltage is set. By establishing a discharge model considering internal resistance voltage division, accurately calculating the actual discharge capacity of a single cluster, and systematically planning super capacitor configuration in combination with MMC topological characteristics, the problems that an existing method is insufficient in configuration precision and lack of topological adaptability are solved, and the reliability of a network-forming SVG is improved.
Owner:YUNNAN POWER GRID CO LTD

Fully differential peak detection AGC circuit

The invention relates to the field of feedback type automatic gain control circuits, and discloses a fully differential peak detection AGC circuit, which comprises a multi-stage variable gain amplifier, a buffer amplifier group, a first comparator EA1, a fully differential peak detection unit and an external port, the external port comprises a power supply end VDD, a ground end GND, a negative signal input end INN, a positive signal input end INP, a positive signal output end VON, a negative signal output end VOP, a plurality of bias ports and a reference voltage end VREF; according to the full-differential peak detection circuit, the full-differential structural design is adopted, common-mode noise and external interference can be effectively restrained, the full-differential peak detection unit alternately discharges the capacitor C11 through the first NMOS tube NM1 and the second NMOS tube NM2, continuous discharge adjustment of the capacitor C11 is achieved, the problem that discharge of the capacitor is interrupted in traditional peak detection is avoided, the loop response speed and the gain adjustment precision are improved, and the detection precision of the full-differential peak detection circuit is improved. Even if one path of the differential signals is temporarily lost, the other path of the differential signals can still drive the peak detection unit and the feedback loop to work, and the reliability is improved.
Owner:博瑞集信(西安)电子科技股份有限公司

A starting control device for a nuclear safety class diesel engine twin motor starting

The application provides a starting control device for nuclear safety class diesel engine double-motor starting, which comprises a main motor M1 and a standby motor M2, an intermediate relay K002, a pulse relay K003, an intermediate relay K004, a main repeated starting relay K01 and a secondary repeated starting relay K02. The application can realize the sequential switching of the main motor and the standby motor by only repeatedly sending a starting signal of a diesel engine control system, and can realize the repeated starting function and avoid the meshing failure of an output gear through the discharge of a capacitor to realize control and time delay.
Owner:山西柴油机工业有限责任公司

A method of manufacturing RFID devices

A method and system for manufacturing an RFID device involve positioning a first conductive member relative to a second conductive member and temporarily securing them together. A localized temperature increase is created at an interface between the conductive members, forming a galvanic connection at a localized weld zone. The method may include applying pressure during heating and can use various heating techniques such as inductive, capacitive discharge, or laser heating. The system includes a transporter, a positioner, and an energy applicator. An RFID device manufactured by this method comprises a first conductive member, a second conductive member, and a galvanic connection between them, with the connection having a localized weld zone exhibiting distinct structural characteristics. The method and system may improve electrical connectivity in RFID devices, particularly between RFID straps and antennas.
Owner:AVERY DENNISON RETAIL INFORMATION SERVICES LLC

Low-voltage pre-calibrated single-current sampling DBD equivalent parameter measurement method and system

This invention discloses a low-voltage pre-calibrated single-current sampling DBD equivalent parameter measurement method and system. Addressing the core shortcomings of existing DBD parameter measurement technologies, such as complex hardware, significant safety hazards from high-voltage sampling, inherent errors introduced by measurement capacitors, and imprecise derivations of single-current sampling schemes, this invention employs a two-step method to achieve full parameter measurement using only single-channel current sampling: First, pre-calibration is performed under low-voltage, undischarged conditions to obtain the DBD series equivalent capacitance and the initial phase of the excitation voltage; then, the circuit current is sampled under normal discharge conditions, and the discharge / undischarge interval is accurately divided using the sliding window variance method. Based on the data from the undischarged interval, a complete excitation voltage waveform is fitted, and finally, all equivalent parameters, including dielectric capacitance, air gap capacitance, discharge sustaining voltage, and discharge power, are calculated. This invention eliminates the need for additional hardware such as high-voltage probes and measurement capacitors, enabling online measurement of equivalent parameters.
Owner:GUANGDONG UNIV OF TECH

Bidirectional capacitance type battery pack equalization method, circuit and BMS (Battery Management System)

The invention provides a bidirectional balancing method between capacitive battery packs, which is characterized in that two capacitors are arranged between two batteries, and when one capacitor is charged, the other capacitor is discharged, so that one capacitor is always in a charging state and the other capacitor is in a discharging state in a charging and discharging period of the capacitors. The invention also provides a bidirectional equalization circuit between the capacitive battery packs and a BMS (Battery Management System).
Owner:DA VINCI ENERGY (HUIZHOU) CO LTD

Direct-current ship power grid fault flexible ride-through method based on zero-sequence current injection

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.
Owner:THE 704TH RES INST OF CHINA STATE SHIPBUILDING CORP

Electricity-electricity hybrid ship direct-current integrated power system short-circuit current calculation method

The invention discloses a short-circuit current calculation method for an electric-electric hybrid ship direct-current integrated power system, which comprises the following steps of: respectively carrying out interelectrode short-circuit current analysis calculation on synchronous rectification generators to obtain generator short-circuit current; filter capacitor discharge current analytic calculation is carried out on the DC / DC converters respectively, and transient discharge current is obtained; analyzing and calculating the steady-state short-circuit current output by the lithium battery through the DC / DC converter to obtain the steady-state short-circuit current; and adding the results to obtain the short-circuit current of the system. Compared with electromagnetic transient simulation calculation, the calculation speed is higher, and the calculation result error meets the allowable deviation range of engineering calculation. The method can provide support for protection design and short-circuit safety check of an electricity-electricity hybrid ship direct-current integrated power system powered by a synchronous rectification generator set and lithium battery energy storage in parallel, and can be applied to ship integrated power system application scenes such as harbors as tugs and offshore large transport ships.
Owner:湖北东湖实验室

A hydrogen discharge machining system and method

PendingCN122322595ACapacitanceVoltage pulse
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.
Owner:JILIN UNIVERSITY

Silicon carbide device state detection circuit based on threshold voltage change

The invention discloses a silicon carbide device state detection circuit based on threshold voltage change, relates to the technical field of power electronics, and aims at online threshold voltage extraction and state evaluation of a SiC power device. The circuit takes a half-bridge structure as a carrier, an integral voltage is formed at a lower tube integral node through transconductance operational amplifier integration of a lower tube gate-source voltage, and voltage jump of a half-bridge midpoint node is converted into a comparator overturning signal of a drain-source event detection node through a high-voltage diode and a current-limiting resistor; and an integral time window is limited and a reset switch MOS tube is triggered to discharge and reset the integral capacitor, so that an integral voltage peak value and event time delay are obtained. The control unit only collects two variables of the event time delay and the integral voltage peak value, gating is carried out according to the calibrated consistency relation, output abnormity types are subdivided, effective measurement screening, false triggering and integral / reset abnormity diagnosis and threshold voltage drift statistics are achieved, and the stability and engineering availability of online detection are improved.
Owner:PENG INNOVATION ENERGY TECH (SHANGHAI) CO LTD

Bootstrap capacitor charging method and electronic equipment thereof

The embodiment of the invention discloses a bootstrap capacitor charging method, which is applied to an asymmetric half-bridge converter comprising a primary side upper tube and a primary side lower tube, and comprises the following steps: when the asymmetric half-bridge converter exits from a burst mode, judging whether the duration of the asymmetric half-bridge converter in the burst mode is greater than a preset time threshold; if the duration time is greater than a preset time threshold value, executing a bootstrap capacitor charging stage by controlling a primary side lower tube until a first preset condition is met; after the bootstrap capacitor charging stage is finished, a primary side upper tube is controlled to execute a resonant capacitor discharging stage until a second preset condition is met; and if the duration time is not greater than the preset time threshold value, or after the discharge stage of the resonant capacitor is ended, enabling the asymmetric half-bridge converter to enter a closed-loop control mode. According to the embodiment of the invention, large current impact caused by overhigh voltage of the resonant capacitor is avoided, the current stress of the asymmetric half-bridge converter is effectively reduced, the noise is reduced, and the stability is improved.
Owner:HYNETEK SEMICON CO LTD

Controller of active clamp flyback conversion circuit, power module and electronic equipment

The application provides a controller of an active clamp flyback conversion circuit, a power module and an electronic device. After the active clamp flyback conversion circuit operates in a suspended working state, the controller controls the discharge of a resonance capacitor of the active clamp flyback conversion circuit, so that the voltage value of the output voltage of the power circuit is higher than the preset voltage value of the low-voltage protection of the controller, thereby avoiding the restart of the controller due to the low-voltage protection, and improving the stability of the power module and the electronic device in which the active clamp flyback conversion circuit is located. Moreover, when the controller controls the discharge of the resonance capacitor, the output voltage ripple of the active clamp flyback conversion circuit is not increased, and noise from the input power is not introduced.
Owner:HUAWEI DIGITAL POWER TECH CO LTD

Current pre-limiting hybrid direct-current circuit breaker based on inductive coupling principle and control method

The invention discloses a pre-current-limiting hybrid direct current circuit breaker based on an inductive coupling principle and a control method. The pre-current-limiting hybrid direct current circuit breaker comprises a main branch and an auxiliary branch which are connected in parallel, the auxiliary branch comprises a bridge type reversing branch composed of thyristors and diode valve groups Q1-Q4, a current transfer branch, a bypass branch, a current limiting part, a self-charging part and an energy consumption branch are arranged in the bridge type reversing branch, and energy release branches composed of common mechanical switches and resistors are arranged at the two ends of a capacitor C1 and the two ends of a capacitor C2 respectively. The energy release branch is used for discharging the corresponding capacitor after the circuit breaker acts; the bypass branch, the current limiting part and the self-charging part are connected in parallel and then are connected in series with the energy consumption branch to form a series unit; the MMC flexible DC power grid circuit is small in on-state loss, low in cost, high in reliability, capable of being flexibly adapted to different abnormal scenes of a DC system, and suitable for the fields of MMC flexible DC power grids and the like.
Owner:CHINA WATER RESOURCES BEIFANG INVESTIGATION DESIGN & RES CO LTD

A frequency dithering control circuit, a control chip, and a switching power supply

This invention discloses a frequency dithering control circuit, a control chip, and a switching power supply. The frequency dithering control circuit includes: a narrow pulse generation module, used to convert an input high-level enable signal into a low-level narrow pulse after the control chip is started; a current source charging and discharging module, used to charge a capacitor connected to a pin of the control chip when a low-level narrow pulse is received, and simultaneously output a first voltage signal based on the voltage signal detected at its detection terminal; and to discharge the capacitor when no low-level narrow pulse is received at its input terminal; a level shifting module, used to convert the first voltage signal into a second voltage signal, either the supply voltage or ground level, and then output it; and a frequency dithering switch module, used to control the conduction and cutoff of the transmission gate based on the second voltage signal, the narrow pulse, and the enable signal, thereby enabling and disabling the frequency dithering function of the control chip. This invention reduces the design difficulty for application engineers.
Owner:GUANGZHOU HUARUI SHENGYANG INVESTMENT CO LTD

Method for suppressing current impact of high-power pulse load based on supercapacitor energy storage

PendingCN122638986ACapacitanceCharge current
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.
Owner:STATE GRID INNER MONGOLIA EASTERN ELECTRIC POWER CO LTD TONGLIAO POWER SUPPLY CO +1

Gravity-flywheel-converter device ternary hybrid energy storage system and smart grid

The application provides a gravity-flywheel-converter equipment ternary hybrid energy storage system and a smart grid, the gravity-flywheel-converter equipment ternary hybrid energy storage system comprising a gravity energy storage equipment, a flywheel energy storage equipment and a power electronic converter equipment for electrical connection with a power grid, and further comprising a master controller in communication connection with the gravity energy storage equipment, the flywheel energy storage equipment, the power electronic converter equipment and the power grid respectively, the master controller being configured to control the discharge of the capacitor in the power electronic converter equipment, the discharge of the flywheel energy storage equipment and the discharge of the gravity energy storage equipment upon receiving an emergency instruction sent by the power grid, the start time of the discharge of the flywheel energy storage equipment being prior to the cutoff time of the discharge of the power electronic converter equipment, and the start time of the discharge of the gravity energy storage equipment being prior to the cutoff time of the discharge of the flywheel energy storage equipment. The application solves the problem that the single energy storage technology in the prior art cannot meet the demand of the new power system for multi-time scale continuous power support.
Owner:北京怀柔实验室

Low dropout regulator

The invention provides a low dropout regulator. The low dropout regulator comprises an amplifier circuit, an equalizer circuit, a compensation capacitor, a discharge circuit and a detection circuit. The amplifier circuit operates between a first supply voltage and a second supply voltage, and includes a differential input pair having a first stage input circuit and a second stage input circuit. The amplifier circuit is configured to generate an output voltage according to an input voltage and a reference voltage. The equalizer circuit is coupled between two intermediate nodes spliced by the first stage input circuit and the second stage input circuit, and is configured to be short-circuited under the control of a control signal. The discharge circuit is configured to be controlled by the control signal to lower the common mode voltage of the common end of the differential input pair. The detection circuit is configured to generate a control signal according to a node voltage of one of the two intermediate nodes.
Owner:WINBOND ELECTRONICS CORP

A stable, interference-resistant, fast power-on / off RC reset circuit

ActiveCN224459766UMOSFETCapacitance
This utility model relates to the field of general circuit technology, specifically to a stable and anti-interference fast power-on / off RC reset circuit; it includes an RC reset circuit and a MOSFET interlock circuit. The RC reset circuit includes resistors R1 and R2, capacitor C, diode D1, and power supply equivalent impedance RL. The MOSFET interlock circuit includes transistors M1, M2, M3, M4, M5, and I1, where I1 is a logic gate OR gate. The RC reset circuit of this design adds a MOSFET interlock structure to the traditional circuit architecture to generate high and low levels, which are then used by logic gate circuits to generate high and low voltage signals, suppressing reset signal jitter that may be caused by power supply noise or environmental interference. At the same time, the RC reset circuit uses a MOS resistor instead of a traditional resistor and utilizes its own substrate diode as a capacitor discharge diode, which can accelerate the discharge of capacitor C. Furthermore, a resistor discharge branch connected in parallel with capacitor C is added to achieve fast reset of the RC circuit when the power supply is rapidly powered on or off.
Owner:FARACONIX TECH CO LTD

A high voltage detection circuit for AC-DC converters

The present invention discloses a high-voltage detection circuit for an AC-DC converter, comprising a high-voltage switching circuit, a high-voltage starting circuit, a voltage-controlled current source, a current detection circuit, a power-off detection circuit, an X-capacitor detection circuit, a logic control circuit, and a sampling control circuit. The high-voltage switching circuit is connected to the high-voltage starting circuit, the voltage-controlled current source, and the sampling control circuit. The voltage-controlled current source is also connected to the high-voltage starting circuit and the current detection circuit. The current detection circuit is also respectively connected to the power-off detection circuit and the X-capacitor detection circuit. The logic control circuit is respectively connected to the power-off detection circuit, the X-capacitor detection circuit, the high-voltage starting circuit, and the sampling control circuit. The high-voltage detection circuit of the present invention issues a power-off protection when the AC voltage is lower than the undervoltage threshold. If it is detected that the rectified voltage does not change or changes very slowly, a system power-off signal is issued and the X-capacitor is discharged to protect personal safety.
Owner:XIAN DINGXIN MICROELECTRONICS CO LTD

Low-power-consumption standby circuit

The utility model discloses a low power consumption standby circuit, which comprises a discharge controller U1 and a rectification module, the input end of the rectification module is connected with a live wire L and a null line N of commercial power, a piezoresistor MOV1 is connected between the live wire L and the null line N, and the live wire L is connected with a fuse F1 in series; the input end of the rectification module is connected with a capacitor CX1 in parallel, the discharge pin of the discharge controller U1 is connected with the two ends of the capacitor CX1 in parallel, and when the equipment works and the discharge controller U1 detects that the voltage on the live wire L and the zero wire N is in normal work, the discharge controller U1 automatically keeps a non-working state; and when the voltage of the live wire L and the zero wire N is detected to drop or the system is powered off, the discharge controller U1 is automatically started, a loop is formed through the resistor RX1, the resistor RX3, the resistor RX2 and the resistor RX4 to discharge the capacitor CX1, and the residual charge of the capacitor CX1 is quickly released, so that the charge residue on the live wire terminal and the zero wire terminal is avoided, the electric shock risk is reduced, and the power utilization safety is improved.
Owner:ZHONGSHAN BAOLIJIN ELECTRONICS

Stabilizer for chassis of motor vehicle and method for producing same

The invention relates to a stabilizer for a chassis of a motor vehicle, comprising a stabilizer tube (2) and a coupling element (5) which is arranged at a first end part (3) and which has an insertion part (19), an engagement part (6) and a connecting device (7) for detachably connecting the coupling element (8), a radial gap (21) being formed between the insertion part (19) and the stabilizer tube (2), and wherein the coupling element (5) is connected to the stabilizer tube (2) via a weld joint (30) produced by capacitive discharge welding between the joining part (6) and the stabilizer tube (2).
Owner:MUHR UND BENNDER KG

Pulse width modulation signal generating circuit

The invention provides a pulse width modulation signal generating circuit, which is applied to the technical field of integrated circuits, and comprises an integrating circuit, a first comparison circuit, a second comparison circuit and a control circuit, the integrating circuit charges a first capacitor when the first comparison circuit outputs a first level signal, and the integrating circuit charges a second capacitor when the first comparison circuit outputs a second level signal. Discharging through the first capacitor; the first comparison circuit outputs a first level signal when the voltage of the first capacitor is lower than a first reference voltage, and outputs a second level signal when the voltage of the first capacitor is higher than a second reference voltage; the control circuit outputs a first reference voltage when the first comparison circuit outputs the first level signal, and outputs a second reference voltage when the first comparison circuit outputs the second level signal; the second comparison circuit outputs a pulse width modulation signal according to the reference voltage when the first capacitor is charged or discharged. The output of the pulse width modulation signal can be realized without a single-chip microcomputer circuit, and the research and development cost is reduced.
Owner:MIND ELECTRONICS APPLIANCE CO LTD

Method for manufacturing a battery cell contact and battery cell

InactiveDE102024123426A1Cell component detailsStorage discharge weldingCapacitanceElectrical battery
The present invention relates to a method for producing a battery cell contact and to a battery cell comprising a battery cell contact produced according to the method. In the method for producing a battery cell contact (10), a battery cell housing element (2) with an opening (60), a connecting element (30) for producing an electrically conductive connection with an electrode, and at least one contact element (20) for realizing an electrically conductive interface are provided. The connecting element (30) is inserted into the opening (60) along an insertion direction (61) so that it passes through the opening (60), and the contact element (20) is welded to the connecting element (30) by means of a capacitor discharge welding process, thereby producing an electrically conductive connection from the contact element (20) to the connecting element (30) that passes through the opening (60) of the battery cell housing element (2). The proposed method for producing a battery cell contact and the battery cell comprising a battery cell contact produced according to the method provide solutions for the design of a battery cell that offer a reliable contacting option for an electrode in a simple, cost-effective and space-saving manner.
Owner:SCHAEFFLER TECHNOLOGIES AG & CO KG

High-voltage non-stroboscopic lamp band compatible with various silicon controlled rectifier dimming

The utility model provides a high-voltage non-stroboscopic lamp strip compatible with dimming of various silicon controlled rectifiers. Comprising a rectifier bridge DB1, a linear constant current driving chip U1, a dimming discharge chip U2, a discharge resistor R7, a discharge resistor R8, a U2 sampling resistor R6, a first lamp string, a second lamp string, an electrolytic capacitor E1, an electrolytic capacitor E2, an electrolytic capacitor discharge resistor R4, an electrolytic capacitor discharge resistor R5, a U1 sampling resistor R1, a U1 sampling resistor R2, a U1 sampling resistor R3, a fly-wheel diode D1, a fly-wheel diode D2 and a fly-wheel diode D3, one end of the bleeder resistor R7 is connected with a pin 2 of the rectifier bridge DB1, and the other end of the bleeder resistor R7 is connected with one end of the bleeder resistor R8. The beneficial effects of the utility model are that the circuit can be compatible with silicon controlled dimmers of different specifications, and solves a problem that a lamp strip is liable to flicker under the condition of low power in a dimming process.
Owner:DONGGUAN GUOYING OPTOELECTRONICS CO LTD