276 results about "Dc control" patented technology

To make effective use of multi-access session.SOLUTION: In a mobile communication system including a core network connected to a plurality of radio access networks, the core network includes a network device for transmitting DC control information for a multi-access session indicating a combination of base stations that prohibit DC (Dual Connectivity) for a user terminal to a base station of a radio access network to which the user terminal is connected when a multi-access session to be established between the user terminal and the core network satisfies a specific multi-access session condition, and the base station includes a DC control unit for controlling DC for the user terminal based on the DC control information for the multi-access session.SELECTED DRAWING: Figure 1

A metasurface array comprises a plurality of electronic control metasurface units, and each electronic control metasurface unit comprises a patch layer, a first dielectric substrate layer, a floor layer, a bonding layer, a second dielectric substrate layer and a bias line layer from top to bottom; the patch layer comprises four square double-ring metal patch structures and a dipole arm structure provided with a pin diode, a central metal through hole penetrating downwards to be connected with the offset line layer is formed in the crossed position, and corresponding to the diameter of the central metal through hole, only the diameter of an opening in the floor layer is large, and the other layers are the same; a peripheral metal blind hole penetrating through the first dielectric substrate layer is downwards formed in the central point of each square double-ring metal patch structure; the bias line layer is of a fan-shaped branch knot structure; under the cooperation of the feed source antenna, the electric control metasurface unit realizes the on-off of a pin diode through phase distribution coding under the control of the direct current control circuit board and the ARDUINO microprocessor, and realizes beam scanning in a specified direction. The antenna is wide in frequency band and low in cost.

The invention relates to a modular multilevel voltage converter (10) comprising three arms (a, b, c), each comprising an upper half-arm and a lower half-arm, wherein each half-arm comprises a chain of individually controllable submodules of formula (I), and wherein the converter further comprises a control unit (30) comprising at least one AC control module (40), a DC control module (52), and a modulation member (58) that is configured to deliver modulation signal setpoints for controlling the control members of the submodules of the upper and lower half-arms, wherein the modulation signal setpoints are delivered on the basis of voltages across the terminals of the capacitors of the submodules of the upper and lower half-arms and on the basis of modulation voltage setpoints applied to the upper and lower half-arms, and wherein the modulation voltage setpoints depend on a modulation voltage alternating component setpoint delivered by the AC control module, a modulation voltage common-mode component setpoint delivered by the DC control module, and a modulation voltage homopolar common-mode component setpoint, which depends on the voltages across the terminals of the capacitors of the submodules of the upper and lower half-arms.

The present application provides an all-digital multi-phase DC-DC controller. The digital DC-DC controller includes time-based analog-to-digital converters (ADCs) for converting analog voltage signals into digital-domain signals so as to benefit from gate length scaling without limited by the low voltage swing. Also, the DC-DC controller further includes a digital control circuit and a time-based modulator. The digital control circuit can control the time-based modulator in a digital domain, thereby reducing the affection caused by process, voltage and temperature (PVT) variation. Also, the time-based modulator can adjust the timing of the PWM signals and avoid the performance degradation caused by circuit mismatch. Since the digital control circuit can be fully synthesizable, it allows implementations in all kinds of digital CMOS processes with a small chip area.

The invention provides a novel magnetically controlled reactor, and relates to the technical field of reactors. The novel magnetically controlled reactor comprises a square iron core, a packaged alternating current coil and a packaged direct current coil, the six square-shaped iron cores are divided into two columns and three rows and are vertically arranged at intervals; the packaged alternating current coils are respectively arranged around the inner vertical part of the square-shaped iron core, the inner ends of the two packaged alternating current coils in each row are connected in series, and the outer ends of the two packaged alternating current coils in each row are respectively used as an input end and an output end; the packaged direct current coils are arranged in the hollow parts of the two columns of square iron cores in a penetrating mode and surround the two columns of packaged alternating current coils at intervals. According to the invention, the technical problem of how to significantly suppress the starting impact current and effectively improve the efficiency of adjusting the saturation and impedance of the iron core by the DC control current based on the high-voltage load is solved.

The invention belongs to the technical field of communication, and particularly relates to a 3-bit phase reconfigurable metasurface. The metasurface comprises a two-dimensional array formed by metasurface units and a direct-current bias network formed by bias lines of the metasurface units. Each unit is composed of three metal layers and two dielectric layers, the top layer is used for receiving and radiating electromagnetic waves, the middle layer serves as a ground layer, and the bottom layer serves as a phase shifter to achieve a 3-bit reconfigurable function. The phase shifter is divided into three parts which respectively realize 45-degree, 90-degree and 180-degree phase shifting functions, and eight phase states are realized through combined work of the three parts; the three parts are respectively controlled by a direct-current bias line, the direct-current bias lines of the units form a bias network, and independent regulation and control of the units are realized by loading direct-current control voltage from an external field FPGA (field programmable gate array) for the phase shifter. By changing the phase array coding of the metasurface, the functions of invisible cloak and RCS reduction can be realized. The metasurface has the characteristics of high precision, low loss and multiple functions.

The invention, which relates to the technical field of hybrid power supply, discloses a flexible AC / DC hybrid power supply system comprising an AC power supply module used for power supply and electric energy processing; the voltage transformation compensation module is used for voltage compensation and voltage transformation; the photovoltaic conversion module is used for photoelectric conversion, electric energy conversion, electric energy superposition and providing compensation electric energy; the direct current control module is used for electric energy conversion and voltage compensation; the transmission control module is used for controlling an electric energy transmission path and supplying power to the alternating current bus module to obtain the transformation compensation module; the energy storage control module is used for energy storage and discharge control; the alternating-current bus module is used for electric energy gathering and power distribution; the photovoltaic detection module is used for setting a low-voltage threshold value and a high-voltage threshold value and carrying out voltage detection; the energy storage detection module is used for setting a low-power threshold value and a full-power threshold value, carrying out electric quantity detection and judging a power supply state; and the central control module is used for signal receiving and module control. The flexible alternating-current and direct-current hybrid power supply system can improve the energy utilization rate and the power supply stability.

The invention discloses a 2-bit multi-polarization reconfigurable electric control metasurface antenna which comprises a linear polarization feed source horn and a reflection type metasurface. The reflective metasurface comprises a plurality of metasurface units arranged periodically, and each metasurface unit comprises a first metal layer, a first dielectric plate, a second metal layer, a prepreg layer, a third metal layer, a second dielectric plate and a fourth metal layer which are sequentially and coaxially stacked from top to bottom. And two pairs of p-i-n diodes are integrated on each metasurface unit and are used for regulating and controlling linearly polarized waves from the feed source. According to the metasurface antenna, the radiation capacity of dual linear polarization and dual circular polarization is achieved through the single linear polarization feed source and the single reflection type metasurface at the same time, the beam scanning capacity of + / -60 degrees is achieved, and the aperture efficiency is high. In addition, a direct-current control circuit for controlling a p-i-n diode switch is designed on the back surface of the reflective metasurface, so that the integration level of the metasurface system is greatly improved. The metasurface antenna has the advantages of being simple in structure, large in polarization number, low in structural complexity and high in integration degree.

The invention discloses a welding device for a direct current control cabinet production cabinet body, and particularly relates to the technical field of welding devices.The welding device comprises a base, a welding mechanical arm is fixedly installed at the upper end of the base, a control terminal is fixedly installed at the upper end of the base, and a rotating structure is fixedly installed at the upper end of the base; the inner surface of the rotating structure is slidably connected with a supporting and positioning structure, and the rotating structure, the supporting and positioning structure and the welding mechanical arm are all connected with the control terminal through cables. According to the welding device for the direct-current control cabinet production cabinet body, the supporting and positioning structure is used for positioning and fixing the main beam and the cross beam of the steel frame, the rotating structure and the supporting and positioning structure are matched so that the steel frame can move along a preset track and move to a preset position, a welding mechanical arm can conveniently weld the steel frame and the cross beam, and the welding efficiency is improved. The supporting and positioning structures are used for positioning the main beams and the cross beams, so that deviation caused by impact of a welding gun in the welding process can be avoided, the welding precision is guaranteed, and the quality and strength of finished products are improved.

The present invention discloses a DC control method and system for improving the transient stability of a grid-connected converter. The method includes: when any one of a power angle over-limit fault judgment module and a voltage over-limit fault judgment module determines that a voltage drop or phase jump fault has occurred in the power grid, the angular velocity control signal of the synchronization control link is processed by a DC port transient energy correction module, and the DC voltage reference value is raised for temporary unbalanced power storage and for inertia correction; the voltage value of the DC port capacitor is compared with the DC voltage reference value, and processed by a steady-state DC voltage control module to obtain a DC voltage control reference value; the output data of the converter at the common coupling point is used to obtain a synchronization control signal according to the synchronization control link; based on the synchronization control signal, an internal potential reference value is obtained according to the internal potential control link, and then a converter drive signal is generated. The present invention can effectively solve the stability problem of the grid-connected converter when a transient fault occurs in the power grid.

The invention relates to a fault chain searching method and device for a power grid containing a flexible direct access receiving end and a medium, and relates to the field of power grid safety, and the method comprises the steps: S1, constructing an electromagnetic electromechanical joint simulation model; s2, simulation is carried out based on the electromagnetic electromechanical joint simulation model, and comprehensive vulnerability indexes of all alternating-current lines in the receiving-end power grid are obtained through calculation based on simulation data, the comprehensive vulnerability index is obtained by a hybrid multi-infeed short-circuit ratio variable quantity, a DC commutation failure voltage recovery capability metric value, a node voltage offset and a power flow transfer entropy; and S3, sorting all the alternating-current lines according to the comprehensive vulnerability indexes from large to small, selecting the first alternating-current line as a starting point of a fault chain, and searching in combination with an electromagnetic-electromechanical joint simulation model to obtain the fault chain. Compared with the prior art, the method has the advantages of reflecting the response process of the conventional DC control system and the flexible DC control system, improving the fault chain search accuracy and the like.

The invention relates to an impedance modeling method and device and computer equipment. Comprising the steps that disturbance voltage is injected to the alternating current side of a main circuit, a first relation between a modulation small signal and an alternating current small signal is obtained through alternating current control topology, the disturbance voltage and a phase angle small signal are correlated through a phase-locked loop, and a second relation between the modulation small signal and an alternating voltage small signal is determined; injecting disturbance voltage to the direct current side of the main circuit, and determining a third relationship between the modulation small signal and the alternating current small signal and a fourth relationship between the direct current small signals based on the alternating current control topology and the direct current control topology; and finally, impedance modeling is carried out in combination with a frequency small-signal model, so that self-impedance and coupling impedance characteristics of an alternating current side and a direct current side can be accurately reflected, and a basis is provided for analyzing system stability and optimizing a control strategy.

The Electric Vehicle Supply Equipment (EVSE) described herein is designed for Vehicle-to-Load (V2L) power transfer, enabling the delivery of electrical power from an electric vehicle to an external electrical load. The EVSE includes an output connector for connecting to a vehicle connector via an output cord, an electronic controller, and a power supply. The power supply is capable of receiving a direct current (DC) control pilot signal transmitted through the vehicle connector via the output connector and supplying DC electrical power to the electronic controller based on the received control pilot signal. This innovative EVSE system facilitates efficient and controlled power transfer between electric vehicles and external loads, enhancing the versatility and functionality of electric vehicle charging infrastructure.

The invention discloses a fault power loss cooperative calculation method and system for a DC power transmission system of a parallel converter topology, and electronic equipment. The method comprises the following steps: establishing communication between a stability control device and DC control and protection equipment of the DC power transmission system; the stability control device judges that the fault-caused locking of the current converter comprises fault-caused locking of the current converter on the side, fault-caused locking of the current converter on the opposite side and locking faults of double sets of crashed fault-pole current converters on the basis of a signal sent by the direct-current control and protection system; according to the direct current pole control mode, whether the sound current converter has the power conversion capability or not when the intra-pole single current converter breaks down is judged, and the direct current fault power loss amount is calculated based on the maximum transmittable power of the remaining sound current converter after the fault. According to the method, the problem of inaccurate fault power loss calculation under complex working conditions of opposite-side single converter locking, bipolar control crash and the like is solved, the effect of accurately calculating the fault power loss amount is achieved, and the method is of great significance to fault analysis, reliability evaluation and safe and stable control of the parallel converter topology direct-current power transmission system.

This invention discloses a method and system for extracting and associating physical and logical circuits in a DC control and protection system. The method includes: constructing physical circuits based on engineering design drawings and optical cable documents; parsing the graphical program of the DC control and protection device to extract communication-related symbol information and constructing logical circuits; and representing the circuit data using a directed graph to associate the physical and logical circuits. This invention can efficiently realize the automatic construction and association of communication circuits, improving the efficiency of communication circuit diagnosis, debugging, and operation and maintenance in ultra-high voltage DC control and protection systems.

The present invention relates to a method, device, and medium for searching for fault chains in a receiving-end power grid containing flexible direct current (FDC), and relates to the field of power grid security. The method comprises: step S1: constructing an electromagnetic, electromechanical, and mechanical co-simulation model; step S2: performing simulation based on the electromagnetic, electromechanical, and mechanical co-simulation model, and calculating, based on the simulation data, a comprehensive vulnerability index for each AC line in the receiving-end power grid, wherein the comprehensive vulnerability index is obtained by the change in the hybrid multi-infeed short-circuit ratio, a DC commutation failure voltage recovery capability metric, a node voltage offset, and a power flow transfer entropy; and step S3: sorting all AC lines from largest to smallest according to the comprehensive vulnerability index, selecting the first AC line as the starting point of the fault chain, and searching for the fault chain using the electromagnetic, electromechanical, and mechanical co-simulation model. Compared with the prior art, the present invention has the advantages of reflecting the response process of conventional DC and flexible DC control systems and improving the accuracy of fault chain search.

The invention relates to the technical field of power control, in particular to an active regulation space quantitative evaluation method considering active voltage coupling influence, and the method comprises the steps: firstly constructing a steady-state power flow equation containing DC control characteristics, correcting a Jacobian matrix through introducing a commutation bus power correction, and building a voltage active sensitivity index; probabilistic load flow calculation is carried out in combination with a new energy output probability model, and a voltage weak node is accurately identified by using an impedance mode margin index; and generating a PV curve by adopting a continuous power flow method, superposing a static voltage safety constraint condition, and performing intersection operation on a unit output interval and a reserve capacity interval in a safe operation range to obtain an effective active power regulation space, thereby accurately quantifying the actual regulation capability on the premise of ensuring the voltage safety, and further realizing high-precision voltage regulation. And the safety and the economical efficiency of system operation are effectively improved.

The invention discloses a photovoltaic power generation control system, a control method, equipment, a medium and a product, and relates to the technical field of photovoltaic power generation, in the control system, the working mode of a photovoltaic array is determined through a front-stage DC / DC control module according to the maximum available power of the photovoltaic array, the actual output power of the photovoltaic array and the power of the power grid side; the pulse duty ratio is adjusted according to the working mode of the photovoltaic array, and a pulse width modulation signal is generated to control the DC-DC boost converter; transient power suppression is carried out through a post-stage DC / AC control module according to power grid side power and actual output power of a photovoltaic array, direct-current bus extra reference voltage is generated, and PI adjustment is carried out according to the direct-current bus reference voltage and an error value between the direct-current bus extra reference voltage and the direct-current bus voltage. And according to a result output by the second PI regulator and a voltage phase signal, a voltage signal and a current signal of a power grid side, a space vector pulse width modulation signal is generated to control the DC-AC inverter, so that efficient, stable and intelligent management of photovoltaic power generation is realized, and powerful technical support is provided for wide application of photovoltaic energy.

The invention discloses an integrated control method for an aircraft power supply system. The method comprises the following steps: directly and electrically connecting an engine controller with a generator output contactor, a transformer output contactor, a storage battery output contactor, a transformer rectifier and a storage battery; the engine controller receives the temperature signal, the output voltage signal and the output current signal of the transformer rectifier in real time, judges the working state of the transformer rectifier, and carries out output control and fault protection on the transformer rectifier according to the working state of the transformer rectifier; and the generator controller receives the temperature signal, the voltage signal and the current signal of the storage battery in real time, judges the working state of the storage battery, and performs output control and fault protection on the storage battery according to the working state of the storage battery. The types and the number of airborne equipment are reduced, three different types of controllers, namely a generator controller, a direct current control protector and a storage battery controller, are combined into a whole, and the economical efficiency of a development stage and an external field use and maintenance stage is improved.

The utility model discloses an external fast charging control device for an electric automobile, which comprises an MCU (Microprogrammed Control Unit) control module, a sensor module electrically connected with the MCU control module, an AC (Alternating Current) slow charging protocol control module, a first CAN (Controller Area Network) transceiver, a second CAN transceiver, a first relay group electrically connected between the first CAN transceiver and a vehicle-mounted OBC (On Board Controller), and a second relay group electrically connected between the second CAN transceiver and the vehicle-mounted OBC, the second relay set is electrically connected between a vehicle-mounted OBC and the alternating current slow charging protocol control module, the third relay set is electrically connected between an OBC terminal of the vehicle-mounted OBC and the second CAN transceiver, and the large-voltage cable is electrically connected between a charging gun and a motor controller. The AC / DC quick charging controller is arranged between the vehicle-mounted OBC and the quick charging adapter, so that the quick charging problem of only configuring a slow charging vehicle is solved, the vehicle charging process information is controlled through the AC / DC controller, the charging information is displayed on the vehicle display screen, an original vehicle-mounted charging display interface can be simulated, and the user experience is better.

The invention relates to a vehicle-mounted safety output circuit, which comprises a negative voltage power supply sub-circuit, a DC control input sub-circuit, a pulse input sub-circuit, an intermediate sub-circuit, an output sub-circuit, a grounding end, a VCC power supply and a load, and is characterized in that the pulse input sub-circuit is connected with the negative voltage power supply sub-circuit, and the negative voltage power supply sub-circuit and the DC control input sub-circuit are connected with the intermediate sub-circuit; the negative voltage power supply sub-circuit is connected with the DC control input sub-circuit, the middle sub-circuit is connected with the output sub-circuit, the VCC power supply is respectively connected with the middle sub-circuit and the output sub-circuit, the load is connected with the output sub-circuit, and the grounding end is respectively connected with the negative voltage power supply sub-circuit, the middle sub-circuit and the output sub-circuit. The DC control input sub-circuit and the pulse input sub-circuit are used as input, and the final output can be effective only when the low-level output of the DC control input sub-circuit and the 100KHz and 110KHz alternating pulses of the pulse input sub-circuit are ensured to be effective at the same time, so that the safety is ensured.

The invention discloses a superconducting microwave resonant cavity, a band elimination filter and a frequency control method, and relates to the technical field of superconducting microwave resonant cavities. The superconducting microwave resonant cavity comprises a thin film layer, a first superconducting electrode, a second superconducting electrode, a third superconducting electrode, a first port and a second port. The first superconducting electrode is arranged on the first surface of the thin film layer; the second superconducting electrode is arranged on one side of the second surface of the thin film layer, a gap exists between the second superconducting electrode and the second surface, and the first end of the second superconducting electrode is connected with the first end of the first superconducting electrode; the third superconducting electrode is arranged on the first surface; the first port is coupled with the first end of the first superconducting electrode and is coupled with the first end of the second superconducting electrode, and the first port receives an external input signal and outputs a target signal; and the second port is connected with the third superconducting electrode and receives an external direct current control signal. The resonant frequency of the microwave resonant cavity is adjustable.

The invention relates to an off-line function verification system and method for a logic control board of an electric actuating mechanism. According to the system, a man-machine interaction module receives a function test scheme and sends the function test scheme to a host control module; the host control module instructs the direct current control module to output a direct current voltage signal to the logic control board to be tested through the output module according to the function test scheme; according to the function test scheme, the host control module controls the instruction simulation module to output valve control simulation signals corresponding to the valve control signal simulation instructions to the logic control board through the output module; the host control module controls the operation monitoring simulation module to output an operation monitoring simulation signal to the logic control board through the output module; and the host control module receives and verifies whether the first interface feedback information and the second interface feedback information meet function verification requirements in the function test scheme, and obtains an offline function verification result of the logic control board. The system is beneficial to improving the function verification accuracy of the logic control board.

1. Name of the Design Product: Graphical User Interface for Parameter Setting of Load Box of Electronic Device. 2. Use of the Design Product: An electronic device. 3. Design Key Points of the Design Product: Lies in the graphical user interface. 4. Picture or Photograph that Best Illustrates the Design Key Points: The front view of Design 1. 5. This design product is a flat product, and other views are omitted. 6. Design 1 is designated as the basic design. 7. Use of the Graphical User Interface: Used for monitoring load box data and implementing function control to achieve human-computer interaction. 8. Description of the Changing States of the Graphical User Interface: The front view of Design 1 shows the initial interface of the load box, which is used to monitor the data of each channel load. Click on the AC control interface in the lower left corner of the front view of Design 1 to enter Figure 1 of the changing states of Design 1. Figure 1 of the changing states of Design 1 is the AC load control interface. Click on any load wattage in Figure 1 of the changing states of Design 1 to enter Figure 2 of the changing states of Design 1; click on the AC control interface in the lower left corner of the front view of Design 2 to enter Figure 1 of the changing states of Design 2. Set the timing value by clicking on any load wattage in Figure 1 of the changing states and press the start timing button, and the interface switches to Figure 2 of the changing states of Design 2. Figure 2 of the changing states of Design 2 shows the load box pulling load and working on a timer; press the DC control interface in the front view of Design 3, and the interface switches to Figure 1 of the changing states of Design 3. Press the power wattage and set the timing time on the interface of Figure 1 of the changing states of Design 3, and the interface switches to Figure 2 of the changing states of Design 3.

The utility model provides a system for automatic frequency conversion control of high-voltage equipment, which comprises an alternating-current power supply module and a direct-current control voltage output circuit which are connected with the input end of a frequency converter, and the output end of the frequency converter is connected with an alternating-current voltage regulator motor through a motor control circuit. The direct current control voltage output circuit composed of the upper computer and the analog quantity conversion module controls the frequency converter to output voltage so as to control the rotating speed of the motor of the alternating current voltage regulator, the frequency converter and alternating current motor voltage regulation control mode is used, compared with direct current motor speed regulation, the anti-interference capability is higher, and the control over the rotating speed of the motor of the alternating current voltage regulator is achieved. The problem that a carbon brush in the direct current motor is easy to damage is solved, the service life of the motor is longer, and compared with the direct current motor, the speed regulation range is wider, the circuit structure is simple and the reliability is high; an analog quantity conversion module in the direct-current control voltage output circuit can output a control instruction of the upper computer as direct-current control voltage, and output of the frequency converter is controlled through the direct-current voltage.

The utility model relates to a nuclear power plant switch test device, which comprises a box body, an operation panel is arranged in the box body, the nuclear power plant switch test device further comprises a main power supply switch, a power supply switch and a power supply switch, the high-voltage power supply unit is electrically connected with the output end of the main power switch and is used for selectively providing a working power supply for the tested switch equipment; the plurality of direct current control power supply units are electrically connected with the output end of the main power switch and are used for outputting different power voltages; the plurality of control units are arranged on the operation panel, are electrically connected with the plurality of direct current control power supply units in a one-to-one correspondence manner, and are used for being electrically connected with the tested switch equipment through a cable so as to control the switch-off or switch-on of the tested switch equipment; and the indication unit is arranged on the operation panel, is electrically connected with one direct-current control power supply unit, and is used for being electrically connected with the tested switch equipment through a cable so as to display the feedback state of the tested switch equipment. According to the utility model, the test efficiency of the switchgear can be improved.

The application provides a converter valve area short-circuit fault positioning method, device, equipment and medium, the method comprises the following steps: dividing the converter valve fault into eight typical valve area short-circuit faults; RTDS simulation analysis, according to the different converter protection action results, dividing into three types of protection actions, giving the typical fault characteristic quantity of the valve difference protection action for positioning the valve area fault and the eight typical valve area short-circuit quick criterion; according to whether the actual converter protection action occurs in the rectifying station or the inverting station, confirming the valve area short-circuit fault occurring station; according to the converter protection action event of the monitoring background, confirming the converter protection action type and the valve area fault converter bridge; calling the built-in fault recording of the DC control protection, analyzing the converter protection action waveform, analyzing the fault characteristics of the current waveform of the valve side of the converter bridge and the outlet current waveform of the DC side, positioning the valve area short-circuit fault point according to the typical fault characteristic quantity of the valve difference protection action and the eight typical valve area short-circuit quick criterion; and has the advantages of fast positioning speed and simple analysis method.

The invention provides a communication unit and a control method thereof, a power converter and a power conversion system, and relates to the technical field of power electronics, and the communication unit comprises a plurality of magnetic rings, a power line communication unit, and a plurality of channel selection switches. A cable on the input side of each DC conversion circuit is provided with at least one magnetic ring; the signal end of the magnetic ring is connected with the signal end of the power line communication unit through at least one channel selection switch; the communication unit is used for switching on the channel selection switch corresponding to the first direct current conversion circuit and switching off the channel selection switch corresponding to the second direct current conversion circuit; the power line communication unit is controlled to send a device search signal, so that the direct current control device receiving the device search signal feeds back a response signal; and receiving the response signal, and taking the direct current control equipment corresponding to the received response signal as the direct current control equipment in the direct current string connected with the first direct current conversion circuit. The identification efficiency of the direct-current conversion circuit connected with the direct-current control equipment can be improved.

The invention relates to the technical field of alternating-current and direct-current power supply devices, and discloses a liquid cooling all-in-one machine alternating-current and direct-current power supply device which comprises a shell, an input interface is formed in one end of the shell, an output end and a connecting end are installed at the other end of the shell, a mounting base is installed at the bottom of the shell, and a storage battery is installed in the mounting base; a clamping and fixing mechanism; and a dustproof mechanism, an extension mechanism and an AC-DC control mechanism. According to the invention, through the arrangement of the clamping and fixing mechanism, when a plug is inserted into the input interface, protruding pieces are pushed to move towards the interior of a movable cavity, so that a connecting rod is driven to move, in the process, a clamping plate moves towards the interior of the movable cavity, and after the plug is completely inserted into the input interface, the two protruding pieces are pushed into the movable cavity together; at the moment, one ends of the two clamping plates are completely separated from the movable frame, and the movable frame drives the clamping plates to clamp the side wall of the plug under the pushing of the first springs, so that the plug can be more stably clamped in the input interface, and the influence on safety caused by loosening of the plug is avoided.

The invention relates to an off-line function verification system and method for a power module of an electric actuating mechanism. According to the system, a man-machine interaction module receives function test information input by a user and sends the function test information to a host control module; the host control module respectively sends an AC voltage control instruction and a DC voltage control instruction to the AC control module and the DC control module according to the function test information, and controls the AC control module and the DC control module to output an AC voltage signal and a DC voltage signal to the output module; the output module outputs the signal to the power supply module of the to-be-tested electric actuating mechanism; the function detection module collects direct current voltage data corresponding to different interfaces of the power supply module and sends the direct current voltage data to the host control module. And the host control module verifies whether the direct-current voltage data meet the function verification requirements in the function test information to obtain a function verification result of the power supply module. The method is beneficial to improving the function verification efficiency of the power module of the electric actuating mechanism.