53results about How to "Reliable switching" patented technology

The invention relates to the technical field of aviation, and discloses a multi-electric aircraft direct-current power supply high-voltage GCU dual-backup arbitration system which comprises a pulse loss detection module, an I / O state detection module, an arbitration control logic module and a redundancy switching circuit module. The pulse loss detection module is used for generating timing pulses by using a 555 timer and detecting whether pulse signals output by the 555 timer are continuous or not; the I / O state detection module is used for detecting the level state of an I / O port in real time and judging that the I / O port is in a low-level, high-level or high-resistance state; the arbitration control logic module is used for processing I / O port state data through a gate circuit and deciding to use the main microprocessor or the standby microprocessor. And the redundancy switching circuit module is used for automatically switching to the standby microprocessor according to the arbitration control logic when the main microprocessor breaks down. The method has the advantage of high reliability.

The invention discloses an automatic UPS system control method, which comprises the following steps of: firstly, acquiring working parameters of commercial power and a UPS in real time, then performing real-time analysis and judgment on the real-time acquired data by using an intelligent decision-making algorithm, outputting a decision, and quickly, automatically and seamlessly switching commercial power supply to UPS power supply when the commercial power is decided to be abnormal. When it is monitored that the mains supply returns to normal, the mains supply is rapidly, automatically and seamlessly switched back to supply power, and stable and reliable uninterruptible power supply is provided for the load through cooperation of the two; during the period, the output of the UPS can be dynamically adjusted according to the load change; during the period, the UPS battery can be remotely managed and maintained, and the service life of the UPS battery is prolonged; during the period, the UPS power supply can be managed and subjected to fault diagnosis remotely; the invention has the advantages of fast response speed, efficient and smooth switching, capability of dynamically adapting to different loads, and stable and reliable power supply.

The invention provides a power generation system. The power generation system comprises a power conversion device, a grid-connected and off-grid switching device and an I / O bus. The grid-connected and off-grid switching device is used for being connected between the alternating current end of the power conversion device and a power grid, the grid-connected and off-grid switching device is further used for being connected with a load, and the power conversion device and the grid-connected and off-grid switching device are both connected to the I / O bus. The power conversion device or the grid-connected and off-grid switching device outputs a low-level signal to the I-O bus under the condition that the power grid breaks down, so that the signal on the I-O bus is switched from a high-level signal to the low-level signal. And after the signal on the I / O bus is switched from a high level signal to a low level signal, the power conversion device is switched to a voltage source mode, and the grid-connected and off-grid switching device disconnects the electric connection between the power conversion device and the power grid. By adopting the method and the device, seamless switching can be realized in the process of switching the power conversion device from the grid-connected control mode to the off-grid control mode, and each device can be reliably switched to the off-grid control mode.

The utility model discloses an anti-icing refrigerator air door, which is characterized in that an air door driving motor is configured to have a third mode, and in the third mode, when an air door blade closes an air door through hole, an output shaft of the air door driving motor drives the air door blade to repeatedly swing slightly relative to the air door through hole; therefore, water attached between the air door blade and the air door through hole is effectively prevented from freezing and bonding the air door blade and the air door through hole, and the problem that in the prior art, when the air door through hole needs to be opened, an air door driving motor cannot drive the air door blade to be opened is solved. The technical scheme is different from the technical scheme that in the prior art, normal opening of the air door blades is guaranteed in a heating mode, so that the scheme is more energy-saving, it is effectively guaranteed that the refrigerating chamber can supply cold air in time for preservation, and meanwhile the service life of the air door driving motor is prolonged.

According to the compressor starting method, the control system, the compressor and the air conditioner, before the compressor enters closed-loop starting, whether inertia rotation exists in a rotor or not is judged, a control signal is generated under the condition that inertia rotation exists, and an inversion module is controlled to achieve short circuit of a three-phase winding of the compressor; the rotating speed of the rotor is effectively reduced; and then, when the rotating speed is lower than a preset threshold value, a closed-loop starting strategy is executed to complete starting. According to the method, by adding the braking step in the inertia rotation state, the problem of inaccurate rotor position estimation caused by the high rotation speed is avoided, it is ensured that the compressor can be reliably switched to closed-loop operation in the low-speed state, the technical problem of starting failure in the inertia low-speed rotation scene of the rotor is effectively solved, and the reliability of the compressor is improved. And the starting success rate and the overall operation reliability of the compressor are improved.

The application provides a device and method for generating controllable flame sheet and flame ring in a planar shock tube, which comprises: an experimental section, a flame generating box arranged in the experimental section, and having a thin layer cavity for accommodating premixed combustible gas inside; a film covering both sides of the flame generating box, for sealing the thin layer cavity and breaking after being impacted by incident shock waves; a wire slot arranged on the flame generating box, having a preset geometric shape; and an ignition element embedded in the wire slot, for heating and igniting the premixed combustible gas; the flame generating box generates flame sheet or flame ring with preset disturbance in the same experimental section by replacing the component with different wire slot shapes. The application reduces the interference with shock wave propagation and flame evolution, thereby providing a reliable and flexible switching experimental platform for studying the compression, curling and stretching of flame interface under the action of incident shock waves.

There is provided a fluid circuit capable of continuously driving a pressure-increasing device with a simple configuration. A first switching valve 8 that switches between flow passages 70 and 80 and first flow passages 80 and 81 according to a change in a fluid pressure to be applied, a second switching valve 130 that is switched to a flow passage which applies the fluid pressure to the first switching valve 8, when a piston 120 has reached an initial position or an end position, and second flow passages 123 and 125, are provided. A biasing force FS2 of a biasing member 140 when the piston 120 reaches the end position is smaller than a pressing force FH1 acting on the piston 120 due to the fluid pressure caused by a fluid supply device 6, and a biasing force FS1 of the biasing member 140 when the piston 120 reaches the initial position is larger than a sum of a flow passage resistance force R1 acting on the first flow passages 80 and 81 and a flow passage resistance force R2 acting on the second flow passages 123 and 125.

This invention discloses a transformer lead fixing device with deformation self-compensation function, relating to the field of transformer technology. The invention includes a fixing plate fixed to the transformer housing, a lead fixing component, a deformation self-compensation mechanism, and a pin mechanism. The deformation self-compensation mechanism includes a clamping component fixed to the end of the lead and multiple stops disposed on the fixing plate. The clamping component has a multi-segmented bent elastic structure, and the stops have inclined abutment surfaces. The pin mechanism adjustably mounts the lead fixing component to the fixing plate. When the lead fixing component is driven to move closer to the transformer housing, the clamping component and the inclined abutment surfaces of the stops abut against each other, generating elastic deformation and achieving electrical contact between the clamping component and the terminal block. This invention, through the multi-segmented bent elastic structure of the clamping component and the unidirectional displacement adjustment of the pin mechanism, achieves adaptive compensation for deformation caused by thermal expansion and contraction and vibration, ensuring long-term stable electrical contact between the terminal block and the lead, and facilitating subsequent maintenance and adjustment.

The utility model belongs to sewing equipment technical field, especially point to a kind of encryption sewing device and sewing machine;One end of the main control lever main shaft of stitch regulating mechanism protrudes shell lower section, and is connected with the one end of main feed tooth adjusting lever, main feed tooth scale plate is provided on shell lower section, first arc-shaped hole with the main control lever main shaft axis as center is provided on main feed tooth scale plate, connecting piece is worn in first arc-shaped hole and respectively connects the other end of main feed tooth adjusting lever and the one end of transmission plate, the other end of transmission plate is connected with the output end of driving part, can make main feed tooth adjusting lever rotate and adjust the stitch of cloth feed tooth under the action of driving part, realize the switching between tight seam and the stitch required by work;The utility model can quickly and reliably switch without stopping between the stitch required by work switching and encryption sewing stitch, can realize automatic encryption sewing when starting sewing and sewing end, significantly improve sewing efficiency and sewing quality.

The invention relates to the technical field of practical training platforms, in particular to a dual-controller motion control practical training platform and a rapid switching method, and the platform comprises a platform body which is provided with an electrical control system. The electrical control system comprises a motion controller based on programming control of an upper computer and a PLC (Programmable Logic Controller) based on programming control of special programming software; the platform body is further provided with a switching module, the switching module can be switched between a motion controller based on upper computer programming control and a PLC based on special programming software programming control, and the motion controller based on upper computer programming control and the PLC based on special programming software programming control are arranged to form double controllers. The platform can be used as a practical training platform for core courses of major majors such as electrical and PLC control technology, motion control technology and the like in electrical major majors.

The present invention belongs to the technical field of substation switch equipment, and particularly relates to a normally closed switch state switching device for a substation, comprising an upper plate and a lower plate, wherein normally closed contact assemblies are arranged on both sides above the upper plate, and fixing seats are arranged on both sides below the normally closed contact assembly, and lower limit assemblies for limiting the downward travel of the normally closed contact assembly are arranged on both sides of the upper plate corresponding to the normally closed contact assembly; insulating shells are arranged on both sides below the lower plate corresponding to the normally closed contact assembly, and normally closed contact seats electrically connected to the normally closed contact assembly are arranged inside the insulating shells; guide sleeves are arranged on the outside of the insulating shells, and operating rods are arranged inside the guide sleeves, and one end of the outer side of the operating rods is connected to a mechanical operating device, and the mechanical operating device drives the corresponding operating rod to move to realize the state switching of the normally closed contact seat and the normally closed contact assembly; the present invention has the advantages of stable normally closed state, fast, reliable and timely switching, and avoidance of fault expansion.

The utility model relates to glass processing equipment technical field, more particularly, relate to a glass product processing platform, glass product processing platform includes frame and elevating system. The frame upper end is evenly arranged several caster wheels with the wheel top up along length and width direction, and the wheel vertexes jointly form the adjustment plane. When the glass plate is placed in the adjustment plane, the operator can safely and labor-savingly push or rotate the glass plate to adjust the horizontal processing angle. When the glass plate needs to be fixed for cutting, edge grinding or drilling, the elevating mechanism is started. The elevating platform moves vertically along the frame through vertical sliding connection, and invades the adjustment plane in the rising process. When the platform surface is higher than the wheel vertex, the glass plate is lifted off the caster wheel and is transferred to the elevating platform for stable fixation. After the processing is completed, the platform is lowered, and the glass plate falls back to the caster wheel to restore the adjustable state. The design solves the safety risk and efficiency problem of manual angle adjustment of large-size glass through the caster wheel adjustment plane, and significantly improves the operation safety and processing efficiency.

The utility model discloses an electric polishing tool mode switching mechanism with a clutch function and a dual-mode eccentric polishing machine. The electric polishing tool mode switching mechanism comprises a gear speed change mechanism, a bolt rod, an eccentric shaft and an eccentric output piece, the gear speed change mechanism comprises a transmission shell, an intermediate transmission shaft, a first-stage transmission gear, a second-stage transmission gear, an output shaft, a first-stage driven gear and a second-stage driven gear, in a high-speed output mode, the first-stage transmission gear is meshed with the first-stage driven gear, and the second-stage transmission gear is separated from the second-stage driven gear; and the ratchet block and the groove between the first-stage driven gear and the second-stage driven gear are correspondingly inserted, embedded and matched. According to the mode switching mechanism of the electric polishing tool, the problems of clamping stagnation, gear tooth breaking and the like in the mode switching operation process are effectively avoided, the convenience and the use stability and reliability of the mode switching operation of the electric polishing tool are improved, and the service life of the mode switching mechanism of the electric polishing tool is prolonged.

A star sensor output time synchronization method relates to the technical field of star sensor time synchronization, solves the problem of star sensor output time synchronization, and outputs time information inside a star sensor by using a clock of the star sensor under the condition of no external pulse per second signal and time broadcast information. And if the external pulse per second signal and the time broadcast information are received, the star sensor outputs standard UTC time information, and synchronizes the internal time information to the UTC time information. And if the external pulse per second signal and the time broadcast information are lost, the star sensor is rapidly switched into internal time information and outputs the internal time information. The time information output by the star sensor can be rapidly and reliably switched between the internal time and the UTC time, and the synchronization problem of the time information output by the star sensor is effectively solved. The output time synchronization method of the star sensor has the advantages of reliable synchronization, accurate time keeping and the like, and is suitable for star sensor equipment.

The invention relates to the field of wafer processing, and discloses a wafer cleaning device and a method thereof.The wafer cleaning device comprises a cleaning tank, a continuous cleaning disc is arranged in the cleaning tank, the continuous cleaning disc is connected with a driving motor through an indexing transmission mechanism, and the driving motor is fixed to the side wall of the cleaning tank; a plurality of wafer bearing mechanisms are distributed on the side face of the continuous cleaning disc in the circumferential direction, a cleaning station and a spin-drying station are arranged at the position corresponding to the continuous cleaning disc, and the cleaning station and the spin-drying station are independently arranged. A cleaning mechanism is arranged at the cleaning station and is used for cleaning the wafers in sequence; a spin-drying mechanism is arranged at the spin-drying station and is used for sequentially spin-drying the corresponding circles; through cyclic indexing conveying of the continuous cleaning disc, discrete cleaning and spin-drying processes are integrated into a continuous assembly line; the loading, cleaning, transferring and spin-drying processes of the wafer are seamlessly connected, so that the time loss of wafer carrying and waiting in the traditional single-machine operation is eliminated, and the wafer handling capacity in unit time is improved.

The utility model discloses rotary cooking equipment, which comprises a base, a first support and a second support are vertically arranged on the upper end face of the base; a first rotating shaft and a second rotating shaft are arranged at the two ends of the baking tray, and the first rotating shaft and the second rotating shaft are assembled on the first support and the second support in the mode of rotating around the axes of the rotating shafts correspondingly and used for allowing the baking tray to turn over; the detection mechanism comprises a detection component fixedly arranged on the second support and a detection piece which is in transmission connection or fixed connection with the second rotating shaft, and the detection piece can move along with the rotation of the second rotating shaft; moreover, the detection member has a first position state within the detection range of the detection member and a second position state outside the detection range of the detection member, and the detection member prompts different cooking procedures to be executed in the baking tray based on whether the detection member is detected. According to the technical scheme, switching of cooking procedures is smoother, more accurate and more reliable, a temperature sensor does not need to be arranged in the baking tray, and therefore production and assembly are more convenient, cost is lower, and maintenance is more convenient.

The invention provides a single board, network equipment and a management method, and belongs to the technical field of communication. The single board comprises a bottom board and a daughter board, and the daughter board is connected with the bottom board in a pluggable mode. The base plate is provided with a business processing module. The daughter board is provided with a management module which is used for managing the business processing module. When the management module breaks down or needs to be upgraded, a user can only pull out the daughter board, and the bottom board is still kept in the network equipment, so that the service processing module on the bottom board can still carry out service processing, and the service processing capacity of the network equipment is kept unchanged.

The utility model relates to the technical field of heating and cooling equipment, and discloses a high-efficiency integrated energy station system capable of supplying cold and hot, which comprises a water-cooling cold and hot water unit, a cold and hot switching pipeline component and a high-efficiency energy tower. A pipeline and a valve are arranged in the cold and hot switching pipeline assembly and communicate with the water-cooling cold and hot water unit, the user and the efficient energy tower correspondingly, so that the functions of cooling and heating can be considered through starting and stopping of the valve, the flow direction of a medium in the pipeline is controlled, cold and hot mode switching is rapid and reliable, the misoperation risk is avoided, one machine has multiple purposes, and heat supply equipment does not need to be additionally purchased. And the system adopts a high-strength container modular design, so that the occupied area is small, the prefabricated production degree is high, and the environmental protection property is high.

The utility model discloses an electric furnace changing switch which comprises a rack, a first output block, a second output block, an input block, a first connecting block, a second connecting block and a switching control device, and the first output block and the second output block are installed on the rack; the input block is mounted between the first output block and the second output block; the first connecting block is arranged on the rack in a sliding manner; the first connecting block is suitable for contacting and connecting the input block and the first output block; the second connecting block is arranged on the rack in a sliding manner; the second connecting block is suitable for contacting and connecting the input block and the second output block; the switching control device is connected with the first connecting block and the second connecting block; and the switching control device is suitable for acting to drive the first connecting block and the second connecting block to move in opposite directions. Switching of different electric furnaces can be achieved, the switching efficiency is improved, and the problem of poor contact is avoided.

The invention discloses an adjustable energy-saving solar street lamp, relates to the technical field of solar street lamps, and aims to solve the technical problem that the conventional road surface brightness at night is not uniform due to the fixed illumination angle and lighting effect mode of an existing street lamp, and the adjustable energy-saving solar street lamp comprises a lamp post, a lamp cap, a solar panel and an adjusting mechanism. Through the angle adjusting assembly composed of the supporting cylinder, the supporting rod and the electric push rod, multi-mode adjustment of the illumination angle of the lamp holder is achieved, and the problems that the illumination direction of an existing solar street lamp is fixed and single, and different requirements of night driving guiding and severe weather safety warning cannot be met are solved; and on-demand energy saving cannot be realized in a low traffic flow period. In a conventional night mode, the lamp holder can be adjusted to project in an inclined mode in the driving direction, a continuous and uniform light blanket is formed, the sight distance of a driver is remarkably prolonged, the zebra crossing effect is eliminated, and energy is saved. In the foggy day mode, the lamp holder can be adjusted to obliquely irradiate in the direction opposite to the running direction, and a basis is provided for follow-up collaborative atomization lighting effect.

The application discloses a reversing mechanism and an aircraft loading and unloading device, and relates to the technical field of aircrafts. The first transmission assembly comprises a first transmission shaft capable of moving axially and a first power joint arranged at one end of the first transmission shaft; the second transmission assembly comprises a second transmission shaft capable of moving axially and a second power joint arranged at one end of the second transmission shaft; and the linkage switching assembly is rotationally connected to the first transmission assembly and the second transmission assembly. The linkage switching assembly is configured to act in response to an external trigger and drive the first transmission shaft and the second transmission shaft to produce linkage axial displacement, so as to switch between the first working mode and the second working mode. Therefore, the application realizes reliable and rapid switching of two-way power output by using a single driving source and a simple linkage structure, and has the technical effects of compact structure, small switching impact, simple control, low manufacturing cost and high operation reliability.

The present application relates to the technical field of lead-acid battery manufacturing, and particularly relates to a lead-acid battery vacuumizing and acid-adding device, which comprises a conveying belt, an acid-adding tank, a three-way valve, an acid storage mechanism, an acid-adding pipeline, a filling mechanism, an adjusting mechanism, a vacuum system and a control system. The three-way valve core is provided with valve holes one, two and three, and a closed arc surface. The filling mechanism is provided with a sealing plunger, which blocks the filling needle head during vacuumizing and opens during acid injection. After the vacuum system vacuums the battery, the acid storage mechanism injects pre-stored quantitative acid into the battery under negative pressure. The lead-acid battery vacuumizing and acid-adding device realizes accurate control of acid quantity, elimination of bubbles and automatic continuous production, and has the advantages of high acid-adding precision, high efficiency and good battery consistency.

The invention relates to a power failure prevention device of a multi-energy hybrid power electric propulsion ship. The power failure prevention device comprises a main electric propulsion assembly, a slave electric propulsion assembly and a switching assembly. The device comprises a main power supply state and an emergency power supply state, when the device is in the main power supply state, a first wire and a second wire are powered on, a moving mechanism is attracted to an electromagnet, and the middle of a third wire is disconnected; when the device is in an emergency power supply state, the main power supply is powered off, the wiring terminal is matched and connected with the joints of the third wire and the fourth wire, and the third wire is connected with the fourth wire. Compared with the prior art, the system has the advantages that the master electric propulsion assembly and the slave electric propulsion assembly cooperate with each other, double electric propulsion guarantee is constructed, redundant supply of ship propulsion electric power is achieved, the operation risk after single power supply outage can be avoided, rapid and automatic switching can be achieved, the recovery time of propulsion power in the fault state is greatly shortened, and the ship propulsion efficiency is improved. And continuous output of ship propulsion power is guaranteed.

This application discloses a hybrid power distribution system, method, and vehicle for a vehicle, including a control module and connected to the control module: a power module for supplying power to a high-voltage load, a low-voltage load, and a battery module; a battery module formed by connecting a first battery unit and a second battery unit in series, wherein the battery module outputs a high-voltage signal to supply power to the high-voltage load, and the second battery unit outputs a low-voltage signal to supply power to the low-voltage load under normal or emergency operating conditions; and an auxiliary converter module connected to the power module and the battery module for performing the following: drawing power from the power module to supply power to the entire battery module; drawing power from the power module to supply power to the second battery unit individually; drawing power from the power module to provide auxiliary power to the low-voltage load; and converting the high-voltage signal output by the battery module into a low-voltage signal to provide auxiliary power to the low-voltage load.

The present invention relates to the field of aviation technology, and discloses a dual-backup arbitration system for a DC power supply high-voltage GCU of a multi-electric aircraft, including a pulse missing detection module, an I / O state detection module, an arbitration control logic module and a redundant switching circuit module; the pulse missing detection module is used to generate a timing pulse using a 555 timer, and detect whether the pulse signal output by the 555 timer is continuous; the I / O state detection module is used to detect the level state of the I / O port in real time, and judge whether it is a low level, a high level or a high impedance state; the arbitration control logic module is used to process the I / O port state data using a gate circuit, and decide to use a main microprocessor or a backup microprocessor; the redundant switching circuit module is used to automatically switch to the backup microprocessor when a main microprocessor fails according to the arbitration control logic. The present invention has the advantage of high reliability.

This application relates to the field of smart bathroom technology, and provides a water pattern switching device, a spray gun, a smart toilet seat, and a smart toilet. The housing's receiving groove and one end of the spray head form a water passage cavity. The spray head is provided with independent first and second water supply channels, which are respectively connected to the first and second nozzles. A drive shaft rotatably passing through the housing drives the spray head to rotate to a first position or a second position. When the drive shaft rotates to the first position, the first water inlet end is connected to the water passage cavity, and the second water inlet end moves to the lowest point of the water passage cavity. The movable part moves to the lowest point under the action of gravity to block the second water inlet end, and only the first water supply channel is filled with water, which is sprayed out by the first nozzle with the first water pattern. When the drive shaft rotates to the second position, the second water inlet end is connected to the water passage cavity, and the first water inlet end moves to the lowest point of the water passage cavity. The movable part moves to the lowest point under the action of gravity to block the first water inlet end, and only the second water supply channel is filled with water, which is sprayed out by the second nozzle with the second water pattern.

The present invention discloses a seamless radio frequency switching system, including: two modulators for generating radio frequency signals; a low-level radio frequency switching switch for switching between two radio frequency signals; a co-phase distributor for realizing equal-amplitude co-phase output of power; two power amplifier units for adjusting signal phase and amplitude; a 3dB bridge 1 for synthesizing the same-frequency signals output by the two power amplifier units; a phase shifter for signal phase shift; a 3dB bridge 2 for synthesizing the two signals output after coupling and phase shifting; a through-type power detector 1 for detecting the output radio frequency signal power; a through-type power detector 2 for detecting the absorption load power; an absorption load for absorbing a small amount of signal frequency passing through the 3dB bridge 2. The seamless radio frequency switching system adopting this structure can realize seamless switching of radio frequency signals, so that the signals can be transmitted uninterruptedly, with high quality, economically and safely, providing a strong guarantee for safe broadcasting.

The present application relates to the technical fields of irradiation crosslinking accelerator, and discloses an anti-radiation interference irradiation crosslinking accelerator beam baffle pneumatic control device, which comprises a beam baffle, a baffle support, a baffle rotating shaft, a gas control valve group, a pneumatic cylinder and a pipeline connection system, the beam baffle is connected with the baffle support through the baffle rotating shaft, and the piston rod of the pneumatic cylinder is in transmission connection with the baffle rotating shaft to drive the beam baffle to rotate; the gas control valve group comprises an electromagnetic valve, a gas control valve and a manual valve, and is fixed to the top of the mounting support; the pipeline connection system comprises a main pipeline, a branch pipeline, a quick connector, a filter and a check valve, and is connected with the air source and the pneumatic cylinder.The present application can use compressed air as the control medium to realize reliable control of the beam baffle in a strong radiation environment, avoids the technical problem that the electric control system is susceptible to radiation interference and has reduced reliability, and improves the operation stability of the irradiation crosslinking accelerator equipment in the radiation environment.

The utility model discloses a machine tool magazine protection structure, which belongs to the technical field of machine tool accessories and comprises two parallel guide plates. The tool magazine door is located between the two guide plates; a driving assembly is arranged between each guide plate and the corresponding guide plate; the two baffles are arranged at the two ends of the guide plates respectively and fixedly connected with the two guide plates respectively; the two baffles and the two guide plates form a protection cavity, and the tool magazine door moves in the protection cavity. The flushing assembly comprises a flushing pipeline, the flushing pipeline is connected with a first flushing opening, and the first flushing opening faces the gap between the tool magazine door and the guide plate; the driving assemblies are arranged between the tool magazine door and the two guide plates, the two driving assemblies are symmetrically arranged, it is guaranteed that the stress of the tool magazine door is balanced in the moving process, and the tool magazine door is stable and reliable in the opening and closing process; meanwhile, in the workpiece machining process, the first flushing opening of the flushing assembly can flush cuttings accumulated on the two sides of the tool magazine door, and the situation that the cuttings hinder opening and closing of the tool magazine door is avoided.

The present invention discloses a new energy grid-connected control circuit and an SST control method based on a virtual synchronous machine. The present invention aims at connecting a new energy grid to a three-stage SST composed of an input stage, an isolation stage and an output stage, and arranges a new energy grid-connected control circuit based on a VSG at the output stage. Based on the circuit, current balance, active power and reactive power constant control under unbalanced voltage are performed through an SST control method, and a control strategy for grid stability is calculated through an SST control method based on a virtual synchronous machine under unbalanced voltage, thereby improving the power supply quality of the grid and improving the grid-connected current, voltage and power quality output by the SST output stage.