486 results about "Voltage reduction" patented technology

The invention discloses a self-excitation cooperative energy management circuit for enhancing TENG output performance, and belongs to the technical field of power electronics. The self-excitation cooperative energy management circuit is connected to the rear end of the TENG and comprises a self-charge excitation circuit, a capacitance converter circuit and a voltage reduction circuit, and the self-charge excitation circuit is connected to the rear end of the TENG, comprises a rectification circuit and is used for charge excitation of the TENG, rectification and output of a first direct current signal; the capacitance converter circuit is connected to the rear end of the self-charge excitation circuit and is used for performing power conversion on the first direct-current signal and outputting a second direct-current signal; the voltage reduction circuit is connected to the rear end of the capacitance converter circuit, comprises a switching circuit and is used for reducing voltage and increasing current of the second direct-current signal and outputting a third direct-current signal. According to the self-excitation collaborative energy management circuit, the charge output capability of the TENG can be greatly improved, and an electronic device can be directly driven.

The invention discloses a power supply control system and method for an eVTOL low-voltage distribution box, and relates to the technical field of power supply control, and the system comprises a multi-source double-bus power supply unit, a voltage reduction unit and an output unit. The multi-source double-bus power supply unit comprises a first bus independent power supply channel and a second bus independent power supply channel, the first bus independent power supply channel and the second bus independent power supply channel are isolated based on a contactor, the first bus independent power supply channel comprises x heterogeneous power sources and x ideal diodes, and the x heterogeneous power sources comprise a high-voltage-to-low-voltage DC-DC power source, a ground power source and n lithium battery power sources. The second bus independent power supply channel comprises y paths of heterogeneous power supplies and y ideal diodes, and the y paths of heterogeneous power supplies comprise y paths of lithium battery power supplies; the step-down unit comprises m paths of DC-DC step-down converters; and the output unit comprises m ideal diodes which are connected in parallel with the output end of the DC-DC buck converter. According to the invention, the stability and quality of power supply are ensured, and airborne equipment is ensured to work in a stable voltage and current environment.

The application belongs to the technical field of high-voltage electrical test and detection, and relates to a disc-type insulator alternating current withstand voltage multi-channel leakage current detection method and system. The method comprises the following steps: setting a parameter set comprising a withstand voltage, a frequency, a voltage raising and stabilizing strategy, sampling parameters, a judgment threshold and a consistency threshold, and generating a version identifier; constructing equipotential boundaries and voltage grading electrodes, and organizing a high-voltage end of a to-be-detected insulator, an independent measurement loop and a common ground reference point; synchronously sampling each loop during voltage raising and stabilizing to obtain a multi-channel sequence; filtering and windowing the sequence to obtain an effective value and a stability index; compensating and calculating a consistency index; combining the threshold, a ground state and a communication state to output a judgment and an event marker, triggering voltage reduction or disconnection, and structuring evidence. The technical scheme of the application is suitable for batch detection of alternating current withstand voltage, and can realize judgment robustness and channel consistency control.

The invention provides a voltage stabilizer based on voltage conversion, a control method and a storage medium, and the voltage stabilizer comprises a PFC chopping boost circuit which receives an input alternating current and a boost duty ratio, carries out the chopping boost of the input alternating current based on the boost duty ratio, and outputs a high-voltage chopping alternating current signal; the positive and negative half-cycle filter circuit is connected with the PFC chopping booster circuit and is used for rectifying and filtering the high-voltage chopping alternating-current signal to obtain a positive voltage-stabilizing chopping alternating-current signal and a negative voltage-stabilizing chopping alternating-current signal; the positive and negative half-cycle voltage reduction and stabilization circuit is connected with the positive and negative half-cycle filter circuit, receives the voltage reduction duty ratio, and performs voltage reduction and stabilization on the positive voltage stabilization chopping alternating current signal and the negative voltage stabilization chopping alternating current signal based on the voltage reduction duty ratio to obtain a preset actual positive electric signal and a preset actual negative electric signal; and the output voltage merging circuit is connected with the positive and negative half-cycle voltage reducing and stabilizing circuit, and integrates the preset actual positive electric signal and the preset actual negative electric signal to obtain a voltage stabilizing electric signal. According to the invention, the voltage fluctuation is quickly responded at low cost.

The invention discloses a passive multi-stage voltage soft turn-off circuit suitable for SiC MOSFETs. The passive multi-stage voltage soft turn-off circuit comprises a driving main branch, a plurality of voltage reduction branches, a driving resistor, a discharging resistor and a driving power supply circuit. The driving power supply circuit is powered by a positive power supply VCC when the SiC MOSFET is turned on, and is powered by a negative power supply VEE when the SiC MOSFET is turned off. The voltage reduction branches are connected to the two ends of the driving main branch in parallel. The step-down branch comprises a step-down delay unit, a step-down action unit and a step-down unit which are sequentially connected in series; the delay time of each step-down branch is increased in sequence, and the step-down voltage drop is increased in sequence. According to the invention, the voltage level can be conveniently controlled by changing the number of the voltage reduction branches, an additional power supply module does not need to be added, the voltage reduction time can be controlled by the voltage reduction delay branches, the degree of freedom of driving is greatly increased, and the circuit is low in complexity, high in voltage reduction degree of freedom and high in reliability.

A pulse generator is disclosed. The pulse generator includes a DC source; a plurality of switches, a transformer; and a pulsing output. The pulse generator can be coupled with a plasma chamber. The pulsing output outputs high voltage pulses having a peak-to-peak voltage greater than 1 kV and a voltage portion between consecutive high voltage bipolar pulses that has a negative slope that substantially offsets the voltage reduction on a wafer within a plasma chamber due to an ion current. The resulting voltage at the wafer may be substantially flat between consecutive pulses.

The utility model, which relates to the technical field of the LED, discloses a leakage protection circuit comprising a power supply circuit, a step-down circuit, an LED circuit and a detection circuit. The input end of the power supply circuit is connected to the output pin of the power supply end, the output end of the power supply circuit is connected with the input end of the step-down circuit and the input end of the LED circuit, and the power supply circuit is used for rectifying the output power supply of the power supply end so as to output the power supply to the step-down circuit and the LED circuit; the output end of the step-down circuit is connected with the detection circuit, and the step-down circuit is used for carrying out step-down processing on the power supply output by the power circuit to output reference voltage to the detection circuit; and the detection circuit is respectively connected with the output pins of the power supply end and the LED circuit, and is used for controlling the working state of the LED circuit according to the real-time voltage difference and the real-time voltage between the output pins of the power supply end and the reference voltage output by the step-down circuit. According to the utility model, the working state of the LED circuit can be controlled according to the real-time voltage difference, the real-time voltage and the reference voltage, thereby realizing anti-creeping protection.

The application relates to the technical field of motor control, and discloses a low-voltage motor based on segmented threshold PWM control, which comprises a motor shell, a motor tail cover arranged at the tail of the motor shell, a control circuit board arranged at the middle of the motor tail cover, a device assembly arranged on the surface of the control circuit board, wherein the device assembly comprises a microcontroller arranged on the surface of the control circuit board, the microcontroller is internally provided with a control system, and the device assembly further comprises a PWM signal input unit, a power input and filtering unit, a voltage reduction and stabilization unit, a reverse electromotive force and voltage sampling unit, a motor power driving unit, a current sampling unit and a temperature detection unit arranged on the surface of the control circuit board. The application utilizes segmented threshold control, closed-loop speed regulation architecture and dynamic threshold reconstruction logic to realize shielding of instruction jitter and accurate speed regulation, and the current determination boundary is reconstructed in real time through the speed deviation and the running state, so that the transient response capability of the motor and the hardware safety and reliability under all working conditions are considered.

The utility model discloses a silicon carbide drive circuit with miller clamping function relates to semiconductor drive circuit technical field, the utility model discloses a power module, drive module, control module and power module, power module is used for converting external 24V power supply into 5V voltage and isolated 15V voltage, and the power supply is powered for drive chip input end and output drive end, drive module is used for the differential signal processing amplification MCU sends to the drive voltage of SIC MOS, the utility model discloses circuit can when the current passes through miller capacitor voltage not through drive resistance directly connects ground, makes the current quick release to the voltage reduction below Vth prevents the false opening, in addition, this circuit can also detect the overcurrent condition of SIC MOS, when the current exceeds the set value, closes drive output, and simultaneously possesses chip and drive voltage detection function, when voltage is unstable, sends signal to MCU and closes drive output.

The invention relates to the technical field of underground sensor equipment, in particular to an underground pipe string acceleration measuring instrument which comprises a cylindrical shell and a main control board, and the main control board is packaged and fixed in the shell and connected with a ground control instrument through a cable. A single chip microcomputer, a primary voltage conversion circuit, a secondary voltage conversion circuit, a constant-current diode, an accelerometer and a step-down circuit are loaded on the main control board; for a measuring instrument for judging whether the setting and perforation operation of a bridge plug is successful or not by using acceleration data, when the voltage of an underground cable is insufficient during ignition of an igniter wire, the detection of the acceleration generated during setting or perforation of an underground perforating gun cannot be carried out; an energy storage capacitor E1, an energy storage capacitor E2, a primary voltage conversion circuit and a secondary voltage conversion circuit are innovatively introduced, and a capacitor energy storage scheme is adopted to solve the problem of input voltage drop caused by perforation ignition.

The invention belongs to the field of circuit system control, and particularly relates to a power supply circuit system. Comprising a first voltage conversion unit, a second voltage conversion unit and a third voltage conversion unit, the first voltage conversion unit is electrically connected with the power supply end, the second voltage conversion unit and the third voltage conversion unit and used for conducting voltage reduction conversion on power supply voltage obtained by the power supply end to generate first conversion voltage and supplying power to the second voltage conversion unit and the third voltage conversion unit through the first conversion voltage. The second voltage conversion unit is used for being coupled between the first voltage conversion unit and a controller of the electric energy meter and carrying out voltage reduction conversion on the first conversion voltage to obtain second conversion voltage, and the second conversion voltage serves as voltage supplied to the controller to enable the controller to be powered on and work; the third voltage conversion unit is used for being coupled between the first voltage conversion unit and the communication module and carrying out voltage reduction conversion on the first conversion voltage to obtain third conversion voltage, and the third conversion voltage serves as voltage supplied to the communication module to enable the communication module to be powered on and work.

The utility model relates to a bridge support appearance inspection device, which comprises a walking track assembly, a bridge support appearance inspection device and a bridge support appearance inspection device, the walking track assembly comprises a walking track, a track support, a track height adjusting nut and a fixing nut unit, and the track support is connected with a bridge pier through the track height adjusting nut and is fixed through the fixing nut unit; the transmission assembly comprises a lateral wheel, a wheel supporting structure, a stepping motor and a tooth-shaped belt. The apparent image acquisition assembly comprises a camera; the development board is used for controlling operation of the stepping motor and shooting of the camera and uploading data; the power supply assembly comprises a lithium battery, a wireless charging module and a voltage reduction module; the transmission assembly, the apparent image acquisition assembly, the development board and the power supply assembly are all arranged on the walking track assembly. Compared with the prior art, through high-efficiency and low-cost automatic inspection, the bridge inspection system flexibly adapts to complex scenes, realizes high-precision detection and data management, and prolongs the service life of a bridge.

The invention discloses an on-load voltage regulation distribution transformer with series converter chains bearing partial power, which is characterized by comprising a group of three-phase series converter chains and a three-phase industrial frequency transformer, the three-phase series converter chain is used for three-phase voltage regulation and comprises three converter sub-chains and N4 three-phase converter sink chains, and N4 is equal to 0 or 1; the three-phase industrial frequency transformer is used for isolating and reducing voltage and providing an energy transfer port for maintaining energy conservation of the three-phase series converter chain, the three-phase industrial frequency transformer comprises 3N0 + 3N1 + 3N2 + 3N2 + 3N4 primary windings and three secondary windings, and N0 is greater than or equal to 0; the invention solves the problems of short service life of the contact and power supply interruption of the sensitive load, and realizes continuous voltage regulation with lower equipment cost.

1. Name of the designed product: voltage reduction line (H530 with push switch, with voltage display). 2. Use of the designed product: used for powering electronic products on cars. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view 1.

Various embodiments include methods performed by a processor system of a computing device for dynamically adjusting voltages for client components. The processor system may identify a potential current profile for a client use case, identify a voltage reduction for the client use case, and transmit the voltage reduction for the client use case to a system power manager. The processor system may identify the potential current profile for the client use case based on a maximum current for the client and a potential maximum current for the client use case. The processor system may cause the system power manager to reduce a client voltage to a voltage level that maintains client voltage at a level greater than a minimum client voltage during a voltage droop caused by a potential maximum current for the client use case.

The invention discloses a dual SIM card switching circuit, device and system, the dual SIM card switching circuit comprises a processing chip, a step-down circuit, a first capacitive reactance circuit, a connection circuit and an SIM module, the SIM module is connected with the processing chip and the two SIM cards, the step-down circuit is provided with a step-down voltage stabilizer, the connection circuit is provided with a one-way TVS tube and two bidirectional TVS tubes, and the two bidirectional TVS tubes are connected with the processing chip. One end of the one-way TVS tube and one ends of the two bidirectional TVS tubes are all connected with the step-down voltage stabilizer, the other end of the one-way TVS tube and the other ends of the two bidirectional TVS tubes are all grounded, one end of the first capacitive reactance circuit is connected with the step-down voltage stabilizer, and the other end of the first capacitive reactance circuit is electrified. Through the switching circuit of the double SIM cards, the switching of two operator networks is realized, the reliability and continuity of the network are improved, the device cost is reduced, the adaptability is strong, the circuit complexity is effectively reduced, and the stability and reliability are improved.

The application provides an amplifier current-limiting control method for fusing power regulation and load characteristic monitoring, comprising: realizing controllable front-stage signal through differential input and band-pass clamping, establishing voltage, current and multi-point temperature monitoring and combining overvoltage detection to generate out-of-limit indication, setting voltage and current upper limit in silicon-controlled voltage regulating module and executing voltage reduction and current limiting, realizing orderly switching through front-stage shutdown and relay stable control when impedance gear is switched, keeping front-stage closed and shutting down power drive when out-of-limit continues to exist, and until monitoring quantity recovers to safe range. Through the collaborative design of "source power limiting, state monitoring, orderly switching and linkage protection", the application effectively suppresses transient impact, shortens protection response time, reduces distortion accumulation, and realizes the unity of high-power output and high reliability of wide-band multi-gear amplifier.

The utility model provides a combined coupling network based on switch switching, comprising a resistor module used for voltage reduction and a capacitor module used for filtering, the resistor module is connected with the capacitor module through a first switch module; the resistor module comprises a plurality of resistor combinations of CN M2, CN M3 and CN M4, and the first switch module is used for controlling the type and number of the resistor combinations connected with the capacitor module in the resistor module. According to the utility model, a plurality of coupling networks can be combined into one, so that the production and later maintenance cost is saved.

The utility model relates to the technical field of wireless charging, in particular to a wireless charging device integrated with a voltage reduction module, which is characterized in that a power supply module is electrically connected with the wireless charging module, the wireless charging module is electrically connected with the voltage reduction module, the voltage reduction module is respectively and electrically connected with a battery and a TYPE-A, and the voltage reduction module is electrically connected with a control module. According to the utility model, stable direct-current high-voltage input is provided through the power supply module, and a proper voltage level can be selected according to actual needs. An input voltage can be stably converted into 12V, 9V and 5V voltages required by wireless charging by adopting a high-performance CPS5333 step-down chip, and the wireless charging device has the characteristics of rapid load transient response and simple loop design, has the lowest requirements on existing standard external components, has a wide application prospect, and is suitable for popularization and application. The wireless charging device can be applied to various electronic devices needing a wireless charging function.

The invention discloses a self-powered kitchen safety monitoring system, and relates to the field of indoor self-powered system design. The system comprises a voltage monitoring module used for sending an output voltage value, monitored in real time, of a photovoltaic module to a safety monitoring unit; the safety monitoring unit is used for performing kitchen safety judgment, sending a stop instruction to the step-down conversion module when the output voltage value is smaller than or equal to a voltage threshold value, and sending a start instruction to the step-down conversion module when the output voltage value is larger than the voltage threshold value; the voltage reduction conversion module is used for reducing the voltage output by the photovoltaic module and then supplying power to the safety monitoring unit through the automatic switching circuit when the starting instruction is received; and the automatic switching circuit is used for switching the input source to the energy storage module when detecting that the step-down conversion module stops working. According to the kitchen safety monitoring system, uninterrupted kitchen safety monitoring is realized through the energy acquisition unit, the energy management unit and the safety monitoring unit, so that the problem of safety monitoring blind areas of an existing kitchen safety monitoring system is solved.

The invention relates to an Ethernet power supply, which is used for being coupled with load equipment. The Ethernet power supply comprises a power supply device, an output control circuit, a path control circuit and a control module, when the output control circuit detects that the load device is not coupled to the output end of the Ethernet power supply, the path control circuit breaks the power supply path from the output end to the control module, and the output control circuit adjusts the output voltage to a first voltage, so that the control module enters a forbidden state. When the output control circuit detects that the load device is coupled to the output terminal, the path control circuit short-circuits the power supply path, and the output control circuit adjusts the output voltage to the second voltage, so that the control module enters an enabled state. The invention also relates to a step-down control circuit and a control method of the Ethernet power supply.

The application discloses a fuel cell power management system and a control method. The system comprises a main power supply, a secondary power supply, an auxiliary module and a power management module. The power management module is used for supplying power to the power management module and the auxiliary module by the main power supply if the main power supply works normally; supplying power to the power management module and the auxiliary module by the secondary power supply if the main power supply works abnormally and the secondary power supply works normally. The main power supply comprises a fuel cell power generation module and a voltage reduction module, and the fuel cell power generation module is connected with a main power supply input port of the power management module through the voltage reduction module. The secondary power supply comprises a power grid and a rectification module, and the power grid is connected with a secondary power supply input port of the power management module through the rectification module. The application is beneficial to improving the working stability of the fuel cell device. The application can be widely applied in the technical field of fuel cells.

The invention discloses a primary step-down and power-on reset circuit, which belongs to the technical field of power management, is applied to an integrated circuit chip with high-voltage input, is used for providing a primary step-down power supply PREVCC for an internal circuit with higher priority and higher power supply requirement in a system, and is integrated with a power-on reset function. Through the circuit design of the invention, two-stage voltage reduction and smooth switching from high voltage VCCHV to medium voltage PREVCC and then to precise power supply VCC are realized, rapid starting of the system is ensured, and the final high-precision power supply requirement is met. Meanwhile, the integrated power-on reset function effectively protects the system at low voltage, and prevents the chip from malfunctioning when the power supply is insufficient. And the high-performance requirement of the whole system on the power supply is met.

The embodiment of the application discloses a communication circuit of an indoor unit and an air conditioner. The communication circuit of the indoor unit comprises a first communication module and a first control module. The first communication module comprises a voltage reduction resistor unit and a first communication unit. The voltage reduction resistor unit is connected with a power supply and the first communication unit respectively. The voltage reduction resistor unit is used for reducing the first voltage provided by the power supply to obtain the second voltage to supply power for the first communication unit. The first control module is connected with the voltage reduction resistor unit. The first control module is used for outputting the level signal corresponding to the power supply type of the power supply according to the power supply type of the power supply. The level signal is used for controlling the first communication module to adjust the resistance value of the voltage reduction resistor unit. The resistance value of the voltage reduction resistor unit is matched with the power supply type of the power supply, thereby avoiding causing the damage of the first communication unit. Meanwhile, it is ensured that the first communication unit can be driven to work, thereby improving the communication reliability of the communication circuit of the indoor unit.

The invention discloses a master control system with a fault recovery function, a control method and equipment, mainly relates to the technical field of fault recovery, and is used for solving the problems that in the existing scheme, a master control automatic restart mode cannot thoroughly power off the master control system and peripheral equipment, the cost of a mode of adding a 4G switch module is high, and self-recovery of the master control system cannot be realized. Comprising an anti-reverse and over-current protection assembly connected to a direct current power supply, an LDO voltage reduction assembly connected with the anti-reverse and over-current protection assembly, a power switch, an MCU system assembly connected with the LDO voltage reduction assembly, a drive circuit connected with the MCU system assembly and the power switch, and a host system connected with the MCU system assembly and the power switch. And the host system is connected with peripheral equipment.

The invention relates to the technical field of electric appliance control circuits, and discloses a non-isolated zero-crossing detection and commercial power voltage detection multiplexing low-cost simple circuit, which comprises a rectifier diode D3301 of which the cathode is connected with a live wire of a commercial power input end, and the anode is connected with a first resistor R3301; the first resistor R3301, the second resistor R3302 and the third resistor R3303 are connected in series. Through a sampling link formed by a rectifier diode D3301 and series voltage dropping resistors R3301, R3302 and R3303, a zero-cross detection signal is provided for an interruption input end VT at the same time, and a voltage detection signal is provided for an analog input end AD through a divider resistor R3304 and a filter capacitor C3301, so that multiplexing of two types of detection is realized under a non-isolation structure, commercial power detection can be completed without an optocoupler or an isolation transformer, and the detection efficiency is improved. Therefore, devices are reduced and circuits are simplified.

The application discloses an integrated current detection device, the integrated current detection device comprises a shunt and a Hall current sensor, the shunt comprises a diversion assembly and a connecting device, the diversion assembly comprises two wiring bodies and a voltage reduction member, and the resistance value of the voltage reduction member is greater than that of the wiring bodies. A clamping groove is formed in the wiring body, the area, where the clamping groove is formed, of the wiring body is divided into two shunting parts by the clamping groove, the sectional dimensions of the two shunting parts in the current flowing direction are set in proportion, the connecting device is used for detecting the current flowing through the diversion assembly, and the Hall current sensor detects the current flowing through the corresponding shunting parts. The overall current can be obtained by detecting the branch current, the requirement for the size of the Hall current sensor needed for detection is reduced, the use cost is effectively reduced, the shunt and the Hall current sensor are integrated, and compared with the prior art, the overall occupied space is effectively reduced, and the detection efficiency is improved. And the complexity of circuit arrangement is reduced.

The invention discloses a secondary battery-to-dry battery conversion circuit and a battery. The secondary battery-to-dry battery conversion circuit comprises a secondary battery circuit, a step-down circuit and a step-down control circuit, wherein the output end of the secondary battery circuit is used for outputting a first voltage; the step-down circuit is connected with the output end of the secondary battery circuit and is used for adjusting the first voltage according to the step-down adjusting signal and outputting a second voltage; the step-down control circuit is connected with the secondary battery circuit and the step-down circuit, and is used for generating an adjustment reference voltage corresponding to the first voltage according to the first voltage, and outputting a step-down adjustment signal to the step-down circuit based on the adjustment reference voltage, so that the step-down circuit outputs a second voltage corresponding to the adjustment reference voltage. According to the technical scheme, the step-down circuit outputs the second voltage corresponding to the adjustment reference voltage, so that the actual use condition of the dry battery is better fitted, and the practicability and the reliability of the conversion circuit for converting the secondary battery into the dry battery are improved.

The invention relates to the technical field of power equipment energy conservation, in particular to an energy recovery device and method applied to a phase modifier system.The system comprises a phase modifier, an excitation transformer, a rectifier module, a bidirectional DC / DC converter, an energy storage battery and a control unit; the control unit integrates a rotating speed monitoring module, a voltage and current monitoring module and an SOC monitoring module and regulates and controls work of all assemblies and on-off of switches. The method comprises the following steps: during shutdown, inertia rotation of a phase modifier rotor generates induced electricity, and the induced electricity is stored in an energy storage battery after excitation transformer voltage reduction, rectification by a rectification module and bidirectional DC / DC adaptation; during starting, the stored electric energy is boosted by the bidirectional DC / DC and inverted by the rectifier module to provide excitation current, and when the rotating speed reaches a rated value, the excitation is switched to the power grid for excitation. Protection strategies such as overvoltage and overcurrent and battery charging and discharging are matched, potential energy recovery is achieved, power grid impact is reduced, the operation efficiency is improved, the assembly service life is prolonged, and the method is suitable for extra-high voltage and new energy grid-connected scenes.

1. Name of the designed product: transformer. 2. Use of the designed product: used for power boosting, voltage reduction, AC current conversion, etc. 3. Design points of the designed product: in shape. 4. Picture or photo best showing the design points: perspective view 1.