430 results about "Auxiliary circuit" patented technology

The invention discloses a domestic high-power IGBT rectification system and method, and relates to the technical field of IGBT rectification, and the method comprises the steps: constructing an active front-end rectification main circuit; a direct current side hybrid harmonic modulation auxiliary circuit is integrated; performing multiple delay signal elimination operation on the sampled signal, filtering out a harmonic interference signal, and locking the frequency and phase of the fundamental voltage of the power grid through a phase-locked loop; establishing a control structure of a voltage outer loop and a current inner loop, generating an instruction amplitude of a grid-side active current and an ideal sinusoidal current reference waveform, and controlling an IGBT in an active front-end rectification main circuit in real time; real-time fast Fourier transform analysis is carried out on the actual input current of the grid side, and residual harmonic components are identified; and feedback management of regenerated energy is realized. The invention provides a fused high-adaptability active front-end IGBT (Insulated Gate Bipolar Translator) rectification method and system which can stably operate under the condition of power grid voltage distortion and realize deep harmonic suppression and efficient energy bidirectional flow.

A bidirectional crosstalk suppression driving circuit suitable for a wide bandgap power semiconductor device comprises a push-pull circuit and a crosstalk suppression auxiliary circuit, the push-pull circuit is connected with the crosstalk suppression auxiliary circuit, and the crosstalk suppression auxiliary circuit is connected with a grid electrode and a source electrode of the power semiconductor device. The push-pull circuit is used for generating a driving voltage signal to drive a power semiconductor device. When the power semiconductor device is subjected to positive crosstalk, positive voltage is generated through a negative voltage capacitor in the crosstalk suppression auxiliary circuit, and the influence of negative overvoltage generated on a driving resistor when the positive crosstalk occurs is reduced; when the power semiconductor device is subjected to negative crosstalk, gate equivalent driving impedance is reduced through an RD auxiliary branch in the crosstalk suppression auxiliary circuit, and reverse overvoltage caused by negative crosstalk is reduced. The circuit has compatibility and economical efficiency, and is simple in structure and easy to operate. The method is of great significance in improving the turn-on and turn-off reliability of a power semiconductor device and guaranteeing stable operation of a system.

The invention discloses a bypass inductor echelon current limiting topology and method for solid-state power distribution equipment, relates to the technical field of power electronic distribution, and is suitable for solid-state power controllers in the fields of aerospace, new energy automobiles and industrial automation. In order to solve the problems that when a large capacitive load is started, a current peak is likely to be generated to damage a device, and an existing current limiting scheme is low in efficiency or large in size, the topology comprises an input circuit, a main power circuit, an auxiliary circuit, a current limiting circuit, an absorption circuit and a load side circuit. According to the method, the auxiliary circuit switch tube is turned on in an echelon mode, and the main switch tube is turned on to complete starting after load voltage approaches power supply voltage and reaches a non-voltage-difference condition. According to the planar inductor integrated PCB, the size is reduced, the problem of long-term heating of a resistor is solved, the TVS overvoltage protection and RC anti-interference design are matched, the current peak is effectively restrained, the system efficiency and reliability are improved, and the high-power-density and differential-pressure-free starting requirements are met.

The application discloses a kind of low conduction resistance flatness analog switch structure of circuit design technical field, including CMOS transmission gate circuit and gate voltage adjusting circuit, CMOS transmission gate circuit includes transmission gate and auxiliary circuit, transmission gate and auxiliary circuit are electrically connected, CMOS transmission gate circuit is used for the signal transmission of main path;Gate voltage adjusting circuit is connected between the gate of PMOS pipe of CMOS transmission gate circuit and the gate of NMOS pipe.The whole input voltage range is handled by gate voltage adjusting circuit in the application, according to input voltage variation, output different slope gate control voltage, to reduce the conduction resistance variation of CMOS transmission gate, to reduce the purpose of conduction resistance flatness.

The invention discloses a power module and a solid-state transformer, belongs to the field of solid-state transformers, and considers that the power module can be divided into a medium-voltage circuit and a low-voltage circuit, and electric energy required by the low-voltage circuit and the medium-voltage circuit can be uniformly obtained based on low voltage provided externally. Therefore, the low-voltage auxiliary source can supply power to the low-voltage circuit based on the electric energy provided by the system auxiliary power supply, and the medium-voltage auxiliary source obtains the electric energy from the low-voltage auxiliary source in an electrical isolation mode and supplies power to the auxiliary circuit in the medium-voltage circuit, so that the system auxiliary power supply can supply the electric energy to the low-voltage auxiliary source through the low-voltage cable. The level requirement of protection design is reduced, and the cost is reduced; and the medium-voltage auxiliary source and the low-voltage auxiliary source are electrically isolated, so that the system control module can directly send a system control instruction to the low-voltage circuit through a low-cost cable, and the cost is further reduced.

This invention discloses a novel AC / DC hybrid power electronic transformer, comprising a transformer housing, a power module housing, and an auxiliary circuit housing. The transformer housing houses transformer windings, a current transformer, and a BCT terminal box. The auxiliary circuit housing includes a power distribution unit, a lightning protection unit, a bypass protection unit, and a maintenance component unit. The power module housing includes an AC / DC module and a DC / AC module. The transformer boasts a compact overall design, making it more suitable for dual-pole cross-arm installation in substations, reducing construction complexity. In AC / DC hybrid mode, it achieves flexible power coordination between the AC and DC grids, while meeting output voltage compliance requirements under varying input voltage conditions and enabling continuous online regulation.

A driving circuit for an insulated gate bipolar transistor (IGBT), an electronic apparatus, and a vehicle are provided. The driving circuit comprises a driving control circuit which is used for outputting a driving voltage signal at a first output end to control the switching state of an IGBT, and stopping outputting the driving voltage signal or setting the driving voltage signal as an invalid level when a short circuit fault at the IGBT is detected; a gate voltage control circuit for providing a gate voltage at a gate of the IGBT based on the driving voltage signal, and implementing discharge of the gate voltage in the case of a short-circuit fault at the IGBT; and a charge / discharge auxiliary circuit connected to the gate voltage control circuit for slowing down the discharge speed of the gate voltage in the case of a short-circuit fault at the IGBT.

This invention relates to the field of switching power supply technology, and provides a projector switching power supply circuit with protection functions, including: a power supply, a power chip, a switching circuit, an auxiliary circuit, a secondary protection circuit, a transformer, an output circuit, and a conversion circuit; pins 3 and 4 of the power chip are respectively connected to the input terminals of the secondary protection circuit, and the power supply circuit is connected to pin 5 of the power chip; the output terminal of the switching circuit is connected to the input terminal of the auxiliary circuit, the output terminal of the auxiliary circuit is connected to the first primary coil of the transformer, and the output terminal of the secondary protection circuit is connected to the second primary coil of the transformer; the first primary coil of the transformer is connected to the input terminal of the output circuit, and the output terminal of the output circuit is used to connect to an external projector; the second secondary coil of the transformer is connected to the input terminal of the conversion circuit, and the output terminal of the conversion circuit is used to output the operating voltage. This invention provides good protection and high reliability.

The application relates to the technical field of circuit board processing, in particular to a surface treatment device for circuit board processing, which comprises a copper immersion tank, a walking structure, a control box, a lifting structure, a air-drying structure, a clamping structure, a hanging basket structure, an adjusting structure, a feeding structure, a conveying structure and a circuit board body; the lifting structure is used for lifting the hanging basket structure, meanwhile, the lifting of the lifting structure can adjust the air-sweeping range of the air-drying structure, the air-sweeping effect is improved, the air-drying process of the circuit board body is accelerated, the chemical solution in one copper immersion tank is prevented from entering another copper immersion tank, and the copper immersion effect is affected; the clamping structure can clamp the hanging basket structure and the circuit board body, and cooperates with the feeding structure to assist the feeding of the circuit board body, so that the feeding efficiency is improved; the position of the partition strip is adjusted through the adjusting structure, and the distance between the hanging basket top frame and the hanging basket bottom frame is adjusted at the same time, different sizes of circuit board bodies are conveniently loaded, and the applicability of the device is improved.

A display device includes: a display panel having a display area and a non-display area around the display area; a plurality of gate lines and a plurality of data lines in the display area, the plurality of gate lines and the plurality of data lines crossing each other to define a plurality of subpixels; a pixel circuit unit in each of the plurality of subpixels; an auxiliary circuit unit in the non-display area; and at least one power supply line in the non-display area and overlapping the auxiliary circuit unit.

The invention discloses head-mounted display equipment, and relates to the technical field of intelligent display equipment, and the head-mounted display equipment comprises a system-in-package main board, an auxiliary circuit board, a conductive part which is electrically connected with the system-in-package main board and the auxiliary circuit board, and a mirror frame. The system-in-package main board and the auxiliary circuit board are arranged on the two sides of the mirror frame respectively. According to the technical scheme provided by the invention, the system-in-package mainboard with a higher integration level is adopted, and the system-in-package mainboard is arranged in the mirror frame and is electrically connected with the auxiliary circuit board through the conductive piece; compared with the prior art, the overall size of the head-mounted display device can be optimized, and the internal space of the device is saved.

Provided is a current resonance type switching power supply device with a simple configuration that has a wide variable range of output voltage and can also achieve ZVS of the main switching element. 【Solution means】The switching power supply device 38 includes a ZVS auxiliary circuit 40 formed by a series circuit of an auxiliary diode 42, an auxiliary inductor 44, and an auxiliary DC power supply 46, which is connected in parallel across both ends of the main switching element 14(2). The switching control circuit 36 determines first and second on-times ton1 and ton2 based on the control voltage Vs of the output by the error amplification circuit 34, and provides a dead time Td to turn on and off the main switching elements 14(1) and 14(2) complementarily. When the first on-time ton1 is ton1 ≧ Tk, control of the first operation mode is performed to set the second on-time ton2 to ton2 = ton1. When the first on-time ton1 becomes ton1 < Tk, control of the second operation mode is performed to set the second on-time ton2 to ton2 > ton1.

The invention relates to the technical field of Internet of Vehicles and battery management, in particular to a charging management and health detection method for a TBOX built-in standby battery, which comprises a charging management module, an MCU (Microprogrammed Control Unit), a charging switch, a discharging switch, an ADC (Analog to Digital Converter) voltage acquisition module, a standby battery, a main and standby power automatic switching module and a rear-end load system, all the modules are electrically connected to form a cooperative work system, the charging management module performs sectional charging on a standby battery based on a battery voltage state, and the MCU control unit controls on-off of the charging switch and the discharging switch and combines sampling data of the ADC voltage acquisition module. A sectional charging mode is adopted, the charging current is dynamically adjusted according to the battery voltage, the charging efficiency is improved, the occurrence of battery swelling, aging and other faults is reduced, and the service life of the battery is prolonged; a battery health detection scheme is optimized, only one ADC voltage sampling port of the MCU is needed, an extra large-current discharge auxiliary circuit is not needed, and MCU resources and hardware cost are saved.

An example apparatus can include one or more of a transformer, a primary circuit electrically coupled to the transformer, and a first auxiliary circuit and a second auxiliary circuit, wherein the primary circuit includes a first bridge leg having a first pair of switches and a second bridge leg having a second pair of switches, the first auxiliary circuit is electrically coupled to the first bridge leg of the primary circuit, the second auxiliary circuit is electrically coupled to the second bridge leg of the primary circuit, wherein each auxiliary circuit is configured to store energy when one switch of a respective pair of switches is on and the other switch of the respective pair of switches is off, and provide the stored energy to recharge all attached capacitances in the respective bridge leg when both switches of the respective pair of switches are off.

The application relates to a circuit for improving the safety of a secondary lithium battery, which comprises a lithium battery body, characterized in that: an auxiliary circuit and an overcurrent protection wire harness are further included; the auxiliary circuit is connected in parallel between the positive and negative output ends of the lithium battery body, the auxiliary circuit comprises a temperature monitoring element and an alarm module connected in series; the temperature monitoring element is used for turning on the auxiliary circuit to make the alarm module electrify and operate when the cell temperature of the lithium battery body rises to an alarm temperature; the alarm module is used for issuing an alarm to remind the staff that the lithium battery body is over-temperature or controlling the charging loop of the lithium battery body to be disconnected; the overcurrent protection wire harness is connected in series on the power loop of the lithium battery group, and the overcurrent protection wire harness is used for cutting off the loop when external short circuit occurs. The scheme solves the problem that the cycle life of the secondary lithium battery group is wasted by the control panel detecting the cell state.

A signal state switching method, circuit, apparatus, device, medium and product, the method comprising: performing a signal state switching operation on a chip selection signal of an external chip (300) through a signal processing circuit (200) connected between the microcontroller (100) and the external chip (300) when data transmission is performed between the microcontroller (100) and the external chip (300). In the method, a CPU in the microcontroller (100) is replaced by a signal processing circuit (200) to perform a state switching operation of a chip selection signal on an external chip (300), equivalently, an auxiliary circuit is added to the microcontroller (100) to automatically perform the state switching operation of the chip selection signal, so that resources of the CPU in the microcontroller (100) are released, the CPU can be fully used for data transmission processing, and data transmission efficiency is improved. According to the invention, multi-frame data can be sent by one-time multi-filling in an asynchronous communication manner, so that the use efficiency of a CPU in the microcontroller (100) is improved, and the utilization rate of CPU resources is also improved at the same time.

The utility model relates to the technical field of capacitance type bushing tap grounding state detection, and provides a capacitance type bushing tap grounding state detection device, which utilizes high-frequency signals to directly detect a capacitance type bushing, remarkably improves the sensitivity and response speed of grounding state detection, and ensures that the grounding condition can be quickly and accurately identified. The high-frequency signal generation module supports 0-300kHz signal output, adapts to detection requirements of capacitive bushings with different capacitances, and has relatively high applicability; the LCD man-machine interaction module is arranged, so that a user can visually display the detected capacitance, the operation convenience is improved, and the user experience is enhanced; the auxiliary circuit can provide corresponding stable voltage for each module.

The invention relates to the technical field of lime cooling, and discloses a continuous lime cooling method and system for double-loop waste heat recovery. The method comprises the following steps: acquiring an initial temperature and a mass flow parameter of high-temperature lime at an outlet of a lime kiln, and extracting a target temperature threshold and a heat exchange medium basic parameter in a cooling process standard from a preset database; then, a double-loop waste heat recovery path comprising a main cooling loop and an auxiliary recovery loop is constructed, and based on the difference value between the initial temperature and the target temperature, the flow speed of the first type of media in the main loop and the flow of the second type of media in the auxiliary loop are dynamically regulated and controlled; the real-time temperature of the high-temperature lime in the main loop, the outlet temperature of the first type of media and the inlet and outlet temperature data of the second type of media in the auxiliary loop are collected in real time at the same time; and finally, judging whether the high-temperature lime meets a cooling standard corresponding to the target temperature or not according to the collected temperature data and a preset heat balance relationship. According to the method, efficient cooling and waste heat recovery are achieved.

This application relates to a chip control circuit, method, and memory chip. The chip control circuit includes a signal detection trigger module and a circuit enable control module. The signal detection trigger module detects address level transition signals based on address signals and outputs a chip wake-up signal in combination with a chip select signal. Then, the circuit enable control module controls the working state of the chip auxiliary circuit based on the chip wake-up signal and the chip select signal, combined with the enable signal of the chip auxiliary circuit. This enables the chip auxiliary circuit to be woken up on demand, effectively reducing the ineffective power consumption of the chip in standby, low load, or no read / write operation scenarios. It solves the problem of high power consumption caused by the continuous operation of the chip detection circuit in the prior art, and can effectively improve the energy efficiency ratio of the chip and the battery life of the chip device.

The present invention discloses a two-output charging circuit and a method for controlling its auxiliary circuit switch. The two-output charging circuit includes two first-stage switch transistors in the half-bridge inverter circuit generating dead time at changing-over and turn-on, and the second-stage switch transistor being turned off within the dead time. In the present invention, making use of a magnetic core to return from the reverse in its bidirectional magnetization process generates dead time, and controlling the time sequence of the switch device of the post-circuit in the dead time abates the voltage stress of the synchronous rectifier diode and reduces the loss of the absorption circuit of the synchronous rectifier circuit.

The invention discloses a high-performance quasi-resonant primary side controller which comprises a control chip, the control chip comprises a pin module, a control circuit module, a detection circuit module, other auxiliary circuit modules and a protection module, and the pin module, the control circuit module, the detection circuit module and the other auxiliary circuit modules are connected with the protection module; high-precision constant-voltage and constant-current output performance can be provided, and the charger is suitable for being applied to an off-line charger; in the constant voltage output mode, a multi-mode working mode is adopted, namely amplitude modulation control and frequency modulation control are combined, and the efficiency and reliability of the system are improved. In the constant current output mode, the chip adopts a frequency modulation control mode, and meanwhile, constant current compensation of line voltage and load voltage is integrated. The primary side controller can work without abnormal noise, excellent dynamic performance can be ensured, and high-performance constant voltage output performance can be obtained by adopting an integrated line loss compensation function.

The utility model relates to the technical field of network testing, in particular to a network tester with a circuit accommodating mechanism, which comprises an upper tester shell and a lower tester shell, and the upper end face of the upper tester shell and the lower tester shell are both provided with threaded holes. The tester upper shell and the tester lower shell are fixed through bolts, a main circuit board and an auxiliary circuit board are welded to the upper end face of the tester lower shell, and the main circuit board is located on the right side of the auxiliary circuit board. A wire harness is inserted between the main circuit board and the auxiliary circuit board, and a storage device is arranged on the wire harness; the storage device is composed of a top plate, a first semiconductor heat conduction plate, an insertion column, a threaded column and a twisting plate. According to the utility model, through the arrangement of the circuit accommodation mechanism, the wire harness can be effectively fixed and accommodated, the neatness and beauty of the tester are improved, the maintenance and repair of the tester by workers are facilitated, and the service life of the tester is prolonged.

The invention relates to the field of integrated circuit design, in particular to a burst mode trans-impedance amplifier circuit for a 50G PON (Passive Optical Network), which comprises a high-frequency signal main circuit and a quick response auxiliary circuit, and the high-frequency signal main circuit realizes high-sensitivity amplification of low-optical-power signals and low-gain amplification of high-optical-power signals through the variable-gain transimpedance-stage amplification circuit and the amplitude-limiting post-stage amplification circuit. The quick response auxiliary circuit realizes ordered quick gain control and quick direct current bias elimination through a quick average value detection circuit controlled by different reset signals generated by the two circuits, and realizes quick response to burst signals together with the high-frequency signal main circuit. The device has the characteristics of high bandwidth, quick response and the like, can stably convert and amplify 50Gbps burst signals, and is suitable for a 50G PON uplink burst mode optical receiver system.

The utility model discloses a kind of intelligent cloud printers, it is related to printing equipment technical field, wherein, intelligent cloud printer includes shell, network module, printing module and data transmission interface module, main circuit board is equipped in shell, control module is equipped thereon.Network module, printing module, data transmission interface module are all in shell.Network module has signal light group and communication component, signal light group contains auxiliary circuit board and signal light, auxiliary circuit board is in the front side of shell and is electrically connected with control module.Printing module contains printing key and printing component, printing component is electrically connected with control module through main circuit board, printing key and signal light are exposed to the front side plate of shell and on auxiliary circuit board.Data transmission interface module contains flow SIM card plug-in interface and wired network interface, is set on the opposite side in the height direction of main circuit board.The technical scheme provided by the utility model can carry out wireless network connection and wired network connection simultaneously, and has the key setting of convenient and user operation.

The application belongs to the technical field of switching power supply, and an auxiliary circuit is added between two branches of a traditional two-phase Dickson converter; in a dead time when all main power tubes are closed, the auxiliary circuit can transfer the charge of one branch to another branch, realizes zero-voltage turn-on of all main power tubes, and reduces switching loss.

An auxiliary circuit (200b) for a power transistor (T2) control device, the auxiliary circuit (200b) being configured to connect to the gate and drain of the gate transistor (T2), the auxiliary circuit (200b) being configured to receive from a main circuit (200a) at least one switching command (OUT_H, OUT_B) and output a gate control (GRDV), the auxiliary circuit (200b) being configured to output a nominal desaturation voltage (DESAT), the auxiliary circuit (200b) comprising at least one auxiliary comparator circuit (224) configured to compare a voltage representative of a drain voltage (VDS) to an advanced desaturation threshold (Vth) so as to achieve early desaturation detection, the auxiliary circuit (200b) being configured to modify the gate control (GDRV) upon early detection. Abstract Figure: Figure 5

The application discloses an alternating current measurement method, device, system and computer readable storage medium, the method comprises: connecting the to-be-measured circuit with a measurement conductor, and determining a measurement position according to the position of the measurement conductor; determining the background magnetic field magnetic flux corresponding to the measurement position, and measuring the total magnetic field magnetic flux in the measurement position through a solenoid and an auxiliary circuit; based on the background magnetic field magnetic flux and the total magnetic field magnetic flux, determining the alternating current intensity corresponding to the to-be-measured circuit. The application determines the total magnetic field magnetic flux and the background magnetic field magnetic flux in the measurement position, calculates the alternating current intensity corresponding to the to-be-measured circuit by using the total magnetic field magnetic flux and the background magnetic field magnetic flux, eliminates the background magnetic field magnetic flux in the calculation process by considering the background magnetic field magnetic flux in the calculation process, and thus the precision of the alternating current measurement based on the magnetic field is improved.

The invention provides a power supply system which comprises a plurality of power units and at least one first voltage conversion circuit. The power supply system has an AC end and a DC end. The plurality of power units are electrically connected between the alternating current end and the direct current end respectively, and each power unit comprises a main power circuit and an auxiliary circuit. The main power circuit comprises a bus capacitor, and the auxiliary circuit is electrically connected to the main power circuit. The input end of each first voltage conversion circuit is electrically connected to the bus capacitor of one of the plurality of power units, and the first voltage conversion circuit is configured to convert the voltage of the bus capacitor into a first voltage so as to provide auxiliary electric energy required by the power supply system in a starting stage.

The invention discloses an alternating current power supply collecting terminal which comprises a main circuit board, a main circuit, an auxiliary circuit board and an auxiliary circuit. The main circuit board and the auxiliary circuit board are oppositely arranged, the main circuit is fixedly installed on the side, facing the auxiliary circuit board, of the main circuit board, and the auxiliary circuit is fixedly installed on the side, deviating from the main circuit board, of the auxiliary circuit board; the main circuit is electrically connected between an external alternating current power supply and a load; the auxiliary circuit is connected with the main circuit through an electric connecting wire and is used for converting alternating current obtained from the main circuit into direct current; the side edge of the auxiliary circuit board is recessed towards the center direction to form a wire passing groove used for avoiding an electric connecting wire. The detachable structure is arranged between the main circuit and the auxiliary circuit board; the protective cover covers the outer sides of the main circuit and the auxiliary circuit; the main circuit board is provided with a first buckle group and a second buckle group to fix the plug-in mounting structure, and a power distribution cabinet mounting structure is integrally formed on the plug-in mounting structure. The mounting process is simple, the structure compactness is improved, and the space utilization rate is high.

The gas detection system comprises a range hood body, a plurality of gas sensors, a main circuit board and an auxiliary circuit board, the main circuit board comprises a wireless communication module and a first main control module, and the auxiliary circuit board comprises a second main control module and a plurality of first signal processing modules. The first main control module is in communication connection with the second main control module, the first main control module is connected with the wireless communication module, the second main control module is connected with the first signal processing module, and the gas sensor is connected with the first signal processing module. According to the technical scheme, the gas sensor is installed at the outer end of the range hood body, the gas sensor is used for detecting the gas concentration of the kitchen space, and the first signal processing module is used for carrying out clutter filtering processing on signals transmitted to the second main control module by the gas sensor, so that the detection accuracy of the gas concentration of the kitchen space is improved; and the function of detecting the gas concentration in the kitchen space by the range hood is realized.