182results about How to "Reduce design cost" patented technology

The invention provides a ground insulation resistance detection circuit, a detection method and a product, which are applied to a detection scene of ground insulation resistance of a direct current side of a non-isolated high-voltage energy storage converter. According to the ground insulation impedance detection circuit provided by the embodiment of the invention, a complex isolation circuit in an isolation type scheme is not needed, an additional bridge arm resistor in a non-isolation type scheme is also avoided, the detection circuit is constructed through a small number of resistors, switches and voltage acquisition modules, the number of devices and the occupation of PCB space are reduced, the design and manufacturing cost can be effectively reduced, and the detection circuit is suitable for large-scale popularization and application. And the compact layout requirement of the non-isolated high-voltage energy storage converter is met. On the basis, the embodiment of the invention further provides a ground insulation impedance detection method, the voltage acquisition module stably collects the first voltage and the second voltage through on-off of the switch, whether the risk of insulation failure exists or not is judged, the situation of sampling signal distortion in a non-isolation scheme can be reduced, and the detection precision is effectively improved.

The application discloses a kind of high-pressure fuel filter prediction model construction method and flow prediction method, including two prediction models, method specifically includes: using computational fluid dynamics method carries out fluid dynamics simulation calculation to high-pressure fuel filter, constructs working condition sample data set;The size of filter hole, quantity, filter working pressure, fuel viscosity and filter pressure drop are used as input variable, and filter flow is used as output variable, two new high-pressure filter general nonlinear flow prediction models are established using artificial neural network and regression prediction method respectively, the flow characteristics of different models of filter in working interval can be accurately predicted using the neural network prediction method proposed in the application at any working condition point, and the error is low;The flow of different models of filter under different conditions can be quickly and accurately obtained, the accuracy meets the engineering needs, while greatly shortening the experimental time and calculation time, saving design cost.

The application provides a frequency domain convolution operation acceleration system for an 8bit frequency domain convolution neural network, relates to the technical field of frequency domain convolution operation acceleration design, and solves the problems of slow convolution calculation of the current frequency domain convolution neural network, difficulty in deployment to a hardware platform with limited resources, influence on product market time and design cost, and the like, obtains a pair of 8bit multiplication data, packs the obtained pair of 8bit multiplication data, performs multiplication calculation on the packed pair of 8bit multiplication data, outputs a frequency domain convolution multiplication result, accumulates the frequency domain convolution multiplication result, outputs a frequency domain convolution accumulation result, restores the frequency domain convolution accumulation result, and obtains a final frequency domain convolution operation complex output result; the application improves the operation speed of the frequency domain convolution, facilitates deployment of the frequency domain convolution to a hardware platform, improves the efficiency of processing digital signals in an FPGA accelerator, accelerates product market time and reduces product design cost.

The utility model relates to the technical field of motorcycle accessories, and discloses a locking driving mechanism and an ignition switch assembly. The locking driving mechanism comprises a bottom plate with a shaft hole, a cover body covering the bottom plate to form a mounting cavity, a motor mounted in the cavity and provided with an output shaft with an output gear, and a telescopic rod penetrating through the shaft hole and an end driving tooth surface to be in meshing transmission with the output gear. The design abandons complex electromagnetic drive, the structure is simple, and the cost is reduced. Through combination of the motor and the telescopic rod, parts are reduced, and the manufacturing process is simplified; the modular design facilitates maintenance, improves reliability, can adapt to different ignition switch assemblies, and is flexible in application.

The utility model discloses a kind of multi LED lamp bead control systems, including DC / DC converter, micro control unit, one or more PCB substrates and switching unit, multiple LED modules are equipped on PCB substrate, at least two groups of LED units are equipped on each LED module, each group of the LED unit includes multiple LED lamp beads, between each group the LED unit and in each group the LED unit the LED lamp bead is formed into lattice circuit by series-parallel connection mode, the DC / DC converter, the micro control unit and each the LED module are connected with the switching unit. The utility model designs the LED lamp bead of each PCB substrate and forms lattice circuit, can realize the lamp bead brightness control of multiple LED lamp beads by a DC / DC converter and a switching unit, can reduce circuit design cost, can be widely applied in light control technical field.

The application relates to the technical field of power supply circuits, and particularly discloses a self-adaptive constant-current control method and system for a DC-DC direct-current conversion power supply, wherein the output voltage is acquired in real time and compared with a plurality of preset voltage thresholds, the interval where the output voltage is located is identified, the input current constant-current given value is reduced according to a first step value in response to the output voltage rising in the voltage limiting zone, the input current constant-current given value is reduced according to a second step value in response to the output voltage rising in the current sharing zone, and the first step value is greater than the second step value, so that the voltage overshoot caused by load shedding is quickly inhibited, the stable control of the output voltage is brought, the dynamic response capability of the system is improved, and the risk of damage of power devices due to overvoltage is reduced.

The application relates to a planetary shaft structure in the technical field of differentials, which comprises a left half shaft gear, a right half shaft gear arranged opposite to the left half shaft gear, and four planetary gears arranged in a cross shape between the left half shaft gear and the right half shaft gear and meshed with the two gears, wherein a main support is arranged through the coaxial two planetary gears of one opposite arrangement, an auxiliary support is arranged through the coaxial two planetary gears of the other opposite arrangement, the two auxiliary supports are respectively arranged on the two sides of the main support, and each auxiliary support is connected with the main support through a positioning piece; the whole planetary shaft structure is simple and clear, the setting of a planetary support is cancelled, the self-strength and mounting strength of the left half shaft gear, the right half shaft gear and the four planetary gears are improved, the design flexibility of the whole planetary shaft structure is improved, and the design complexity and cost of the differential assembly are reduced.

The present application relates to a PCBA carrier plate model generation method, system, electronic equipment and storage medium, the method comprises: obtaining basic data; the final clearance contour line of the to-be-tested panel is obtained based on the clearance contour line of all components on the to-be-tested panel and the PCBA outer contour line; the clearance depth of the to-be-tested panel is obtained based on the clearance depth of the components and the minimum clearance depth of the to-be-tested panel; the corresponding clearance groove is generated on the carrier plate based on the final clearance contour line of the to-be-tested panel, the clearance depth of the to-be-tested panel and the layout data of the to-be-tested panel; the second support area is obtained based on the final clearance contour line of the to-be-tested panel, the to-be-tested panel data and the layout data of the to-be-tested panel; the first plate surface support is generated on the carrier plate based on the second support area and the clearance depth of the to-be-tested panel; the radio frequency via, the handle position and the surrounding block slot are generated on the carrier plate, and the final carrier plate model is generated. The method improves the work efficiency and the accuracy of generating the carrier plate model, and saves the design cost for the enterprise.

An integrated architecture system for dual-indirect heat pump thermal management in pure electric vehicles based on R290. Currently, most pure electric vehicles have low integration levels in their thermal management systems. Typically, the battery pack circuit and air conditioning circuit are connected in parallel through a heat exchanger, while the motor and electronic control cooling circuit is an independent circuit. This results in too many system components, occupying a large amount of engine compartment space, and lacking a standardized and precise processing structure. In this invention, one end of the radiator is connected to the second refrigeration device, and a first valve body is provided between the radiator and the second four-way valve. The other end of the radiator is a double-ended connection end, which is sequentially connected to one end of the second refrigeration device through the fourth inlet / outlet and the second inlet / outlet of the second four-way valve. A third valve body is provided between the double-ended connection end of the radiator and the second four-way valve. The other end of the second refrigeration device is connected to the first inlet / outlet of the second four-way valve. The double-ended connection end of the radiator is sequentially connected to the fourth inlet / outlet of the second four-way valve through a drive motor, an electronic control unit, and a second water pump.

This invention discloses a high-precision PWM pulse generation circuit and chip. The PWM pulse generation circuit includes a PWM pulse group unit, an output logic unit, and a precision control unit. A set of delayed clock signal input ports are connected to a set of input terminals of the PWM pulse group unit; a first control signal input port is connected to the control terminal of the PWM pulse group unit; and a set of output terminals of the PWM pulse group unit are connected to a first set of input terminals of the output logic unit. A second control signal input port is connected to the input terminal of the precision control unit; and a set of output terminals of the precision control unit are connected to a second set of input terminals of the output logic unit. The output terminal of the output logic unit is connected to the output terminal of the PWM pulse generation circuit. This PWM pulse generation circuit realizes the generation and adjustable output of a set of high-precision PWM pulse signals.

This invention discloses a design method for parallel current sharing of BOOST multiphase interleaved silicon carbide single transistors. It identifies key parasitic parameters by building a dual-pulse simulation platform, completes device layout in conjunction with the overall system structure, uses PCB symmetry and copper layer stacking to control parasitic parameter consistency, and forms a design closed loop through dual-pulse and steady-state thermal testing. This effectively solves the problem of poor current sharing in parallel silicon carbide single transistors. Furthermore, this method ensures balanced current distribution during switching transients and conduction steady states, eliminates current sharing failures caused by parasitic parameter mismatch, fully utilizes the performance of silicon carbide single transistors without requiring amplification device margins, flexibly adapts to the overall system layout, improves space utilization, optimizes system efficiency, reduces design costs and redundancy, and achieves a reliable, efficient, and highly adaptable design for parallel current sharing of BOOST multiphase interleaved silicon carbide single transistors.

The application discloses a modular servo driver power unit module, which comprises a power board (20), a plurality of IPM modules (204) are integrated in the middle area of the power board (20), and a power input port (203), a control input port (202) and a control output port (201) are integrated in the edge area of the power board (20); the power input port (203) is used for receiving external power; the control input port (202) is used for acquiring a control signal sent by an external device; and the control output port (201) is used for sending a driving signal to an external motor. The power board (20) is fixedly arranged on a mounting bracket (10), and a radiator (30) is connected with the middle area of the power board (20) so as to be in close contact with the plurality of IPM modules (204). The modules in the power unit module of the application are separately packaged and installed, so that the modules can be individually repaired and customized, the reusability is high, and the design and maintenance costs are reduced.

This application provides a method, apparatus, and electronic device for controlling welding wire. The method involves acquiring weld position information and determining the welding start and end points. Based on these points, and according to the welding speed of the welding equipment, a first and second position for wire melting are determined. The welding head is controlled to move from the first to the second position while maintaining the relative position between the laser emitted from the welding head and the welding wire. The wire feeding mechanism stops feeding the wire, and the laser simultaneously melts the wire. The wire feeding mechanism then retracts the wire, and the welding head is controlled to shut off laser emission, moving the welding equipment to the second position. This allows the welding equipment to directly cut the welding wire during the welding process, improving production efficiency and reducing welding time.

This utility model relates to a refrigerator, comprising: a hollow interior and an open front; a drawer for storing items, movable in and out of the open front of the refrigerator, the drawer having a panel and a heat insulation layer behind the panel; further comprising: a heating element disposed between the heat insulation layer and the panel; a conductive sheet for connecting to a power circuit disposed in the refrigerator body; and a contact switch disposed in the drawer and connected to the heating element, wherein the contact switch is triggered when the drawer enters the refrigerator body and closes the open front of the refrigerator body; and the contact switch disengages from the conductive sheet when the drawer moves out of the refrigerator body and opens the open front of the refrigerator body. This utility model reduces costs while preventing condensation on the front panel of the drawer.

The invention discloses a parallel flow channel heat exchanger flow distribution simulation method based on a general flow resistance model. The method comprises the following steps: 1, a single-channel general flow resistance model construction stage: creating a general flow resistance model; carrying out single-channel fine modeling and simulation; acquiring pressure drop-flow velocity data; fitting to determine a flow resistance coefficient; 2, a whole machine flow distribution simulation stage: constructing a whole machine simulation model: establishing a three-dimensional geometric model of a macroscopic flow channel system of a target heat exchanger, performing grid division to obtain a macroscopic flow channel CFD model, abstracting all parallel micro-channels of a core heat exchange section of the target heat exchanger into a parallel flow resistance network consisting of a large number of flow resistance elements, each flow resistance element is endowed with a universal flow resistance model which is determined in the first stage and has a specific flow resistance coefficient; coupling solution is carried out, an iteration process is established, the error between the driving pressure difference of each flow resistance element and the pressure drop calculated according to the general flow resistance model is smaller than a preset threshold value, and iteration convergence is carried out; and outputting a flow distribution result of all parallel flow channels of the whole target heat exchanger.

The utility model relates to the field of hoisting equipment, in particular to a supporting mechanism and a water chilling unit end cover hoisting device, which comprise a mounting component, the mounting component comprises two mounting seats arranged in the same row, and mounting plates are hinged on the mounting seats; the support assembly comprises supporting legs, the lower ends of the supporting legs are detachably arranged on the mounting plate, and the upper ends of the two supporting legs are hinged to the same transverse frame; due to the fact that the support assembly is detachably installed, hoisting of a plurality of end covers can be completed only through one support assembly, and the use cost is low. Meanwhile, the opening and closing angles of the two supporting legs can be changed, so that the support assembly is suitable for hoisting end covers such as condensers and evaporators of water chilling units of various models, hanging brackets with different opening and closing angles do not need to be independently designed for the end covers of the condensers and the evaporators of the various models, and the design cost is reduced.

This utility model provides a modular structure, including a head and a body. The head has a first connecting hole, and the body has a first connecting portion. The cross-section of the first connecting portion is circular, and the cross-section of the first connecting hole is adapted to the shape of the cross-section of the first connecting portion. The head and the body are detachably connected by inserting the first connecting portion into the first connecting hole. This solution forms a modular structure with a head and a body. The head has a first connecting hole, and correspondingly, the body has a first connecting portion. Inserting the first connecting portion of the body into the first connecting hole of the head allows for a detachable connection between the head and the body, facilitating independent production of the head and body and reducing the design and production costs of the modular structure.

The application is suitable for the technical field of LED driving, and provides a feedback adjusting circuit and an LED driving circuit.The feedback adjusting circuit comprises a current adjusting module, a pull-up module and a feedback module, the current adjusting module is electrically connected with the pull-up module and the feedback module respectively, the current adjusting module is used for being electrically connected with the negative electrode of an LED load, the feedback module is used for being electrically connected with the input end of a power supply chip, and the output end of the power supply chip is electrically connected with the positive electrode of the LED load.The feedback adjusting circuit is constructed by the independent current adjusting module, the pull-up module and the feedback module in the embodiment of the application, the control is realized without using the mode that the step-down / step-up power supply and the constant current driving control circuit are highly integrated in the same chip, the cost of the feedback adjusting circuit is significantly reduced, the requirement for the integration degree of the power supply chip is reduced, and thus the manufacturing cost of the power supply chip and the design cost of the LED driving circuit are effectively reduced.

The application provides a kind of drawing feature and digital matching method, system, equipment and medium, comprising: obtaining three-dimensional model and automatically extracting all relevant feature information;Obtain two-dimensional drawing and automatically extract all label information;Overall projection is carried out to three-dimensional model, and the model transformation projection image and projection information corresponding to three-dimensional model are generated;The model transformation projection image and two-dimensional drawing are carried out hash calculation, and the section projection picture position of the three-dimensional model corresponding to two-dimensional drawing is found;According to feature information, label information, two-dimensional drawing and step S3, determine three-dimensional model projection image and projection information, determine which part of feature of three-dimensional model corresponding to label information, and correspond label information to three-dimensional feature list;Output labeled three-dimensional model and feature label data details.The application can improve the efficiency and accuracy of two-dimensional drawing information recognition in production and processing, solve the problem of feature label information that two-dimensional drawing cannot be automatically recognized in automobile production.

The utility model relates to wearable equipment, and discloses a modularized intelligent bracelet which comprises a bracelet body, the bracelet body comprises one or more intelligent beads which are built together, and each intelligent bead comprises an independent power supply module, a wireless transmission module and one or more functional modules. All the intelligent beads communicate with an intelligent terminal through respective wireless transmission modules, or one intelligent bead serves as a control bead, and other intelligent beads communicate with the control bead through respective wireless transmission modules. According to the intelligent bracelet, the functions of a traditional bracelet are thoroughly changed, the intelligent bracelet is changed into intelligent wearable equipment while the requirement for attractiveness is met, the intelligent level of the bracelet is improved, and the practicability is higher.

The invention relates to a motor drive control method for preventing battery overcurrent of a new energy automobile, which comprises the following steps of: distinguishing a battery recharging mode and a battery discharging mode according to an automobile state; when the motor is in a battery recharging mode, the maximum allowable kinetic energy feedback torque of the motor is calculated; when the motor is in the battery discharge mode, calculating the maximum allowable discharge driving torque of the motor; carrying out filtering processing on the calculated torque value, and calculating an output torque value; the motor can be effectively controlled only by monitoring the current state of the battery, the overcurrent of the battery can be prevented, and the design cost can be reduced.

This invention discloses a plant cultivation system, belonging to the technical field of plant cultivation systems. The system includes a cultivation chamber, double-sided supplemental lighting fixtures, multiple cultivation units, and a ventilation system. By centrally arranging double-sided supplemental lighting fixtures within a closed chamber, and layering multiple nutrient return components and multiple inclined cultivation pots on mounting frames on both sides of the fixtures, with the cultivation chambers of the pots inclined towards the supplemental lighting fixtures, and a ventilation system at the top of the chamber, all planting surfaces can receive uniform light and ventilation. Simultaneously, the ventilation system dissipates heat from the lighting fixtures, eliminating the need for additional cooling devices and resulting in lower energy consumption. Compared to traditional flat-layer cultivation, this solution offers higher space utilization efficiency, more efficient use of light resources, complete recycling of nutrient solution, and more uniform overall crop light exposure. Annual yield for the same planting area is significantly higher than traditional methods, while requiring less manpower and lower costs for daily maintenance, making it suitable for large-scale, high-efficiency cultivation.

The utility model provides a universal mould base plate, which relates to the technical field of mould base plates, and comprises a bottom plate, a cylinder and a guide component are arranged on the bottom plate, the cylinder and the guide component are both connected with a mounting plate, the universal mould base plate also comprises a support block, the support block has various sizes, and the height difference between the support block of each size and the bottom plate and the mounting plate is matched; according to the device, when a mold applied to a small-sized press is transferred to a medium-large-sized press for use, a base plate with a new size does not need to be redesigned and added, and the base plate can be initially mounted at one time; the follow-up base plate can automatically adjust the height according to the die-filling height of a medium-large press so that the die can be matched with the die-filling height of a new press after being lifted, operation is convenient and fast, time is not consumed, the design cost of the base plate is remarkably reduced, and the universality of the die base plate in the using process is further improved.

The invention discloses a conveying device and a conveying system.The conveying device comprises a solid tray conveying assembly, an empty tray conveying assembly, a first conveying assembly, a second conveying assembly and a first push-pull assembly, and the empty tray conveying assembly is arranged on the lower side of the solid tray conveying assembly; the first conveying assembly has a first state in butt joint with the solid tray conveying assembly and a second state in butt joint with the empty tray conveying assembly, the first push-pull assembly is arranged on the lower side of the empty tray conveying assembly and can reciprocate in the conveying direction of the empty tray conveying assembly, and the conveying device is configured to respond to the first conveying assembly to be switched to the second state. In the second state, the first conveying assembly and the empty tray conveying assembly are arranged in a staggered mode in the conveying direction of the empty tray conveying assembly, and the first push-pull assembly can drive the empty trays on the first conveying assembly to the empty tray conveying assembly. The conveying device can improve the overall logistics efficiency and the automation level, and manual intervention can be reduced.

This utility model discloses a planar low-frequency speaker and earphone, including a cover and a housing, with a mounting cavity formed between the cover and the housing, and a sound-generating component disposed within the mounting cavity. The cover includes a first annular portion, a second annular portion, and a third annular portion, the diameters of which gradually decrease. A first sound outlet is formed at the center of the top of the third annular portion, and a PCB board is fitted around the outer periphery of the third annular portion. The PCB board includes a PCB clearance groove and is tightly attached to the top of the second annular portion. The PCB board is electrically connected to the sound-generating component. A second sound outlet is formed at the center of the bottom of the housing. The PCB board is fitted onto the third annular portion of the cover and abuts against the top of the second annular portion. Compared to the prior art where the PCB board is located on the side or bottom of the housing, the thickness of the entire planar low-frequency speaker can be reduced. While maintaining high sensitivity, it can be used as a standard component for installation in various earphone housings, reducing earphone design costs.

A compatible installation interface for a vertical plugging circuit board is characterized in that the compatible installation interface comprises a mother board, a connector socket, a connector plug, a vertical fixed guide rail and a PCB plugboard, the connector socket is arranged above the mother board, the connector socket is welded and fixed on the mother board, the vertical fixed guide rail is fixedly connected with the mother board through three combination screws, and the PCB plugboard is fixedly connected with the connector socket. The vertical fixed guide rails are used in pairs, PCB guide grooves are formed in the two sides of each vertical fixed guide rail, a PCB plug board is installed between the two oppositely-arranged vertical fixed guide rails, a limiting assembly used for limiting the PCB plug board is arranged above the vertical fixed guide rails, a connector plug is installed below the PCB plug board, and the connector plug is connected with the PCB plug board. According to the utility model, the PCB plugboard and the mother board are arranged at an angle of 90 degrees, and the vertical fixed guide rail is used for auxiliary positioning, so that the rigidity of the circuit board is enhanced, and reliable connection of the connector in a strenuous vibration environment is ensured; and a mounting interface is converted through the PCB width adjusting plate, so that a set of mother board can be compatible with various PCB plug boards.

The utility model relates to the technical field of PCBA boards, in particular to an intelligent control module based on a PCBA board, which comprises a bottom board and a PCBA board body, the top end of the bottom board is fixedly connected with a protective shell, the front end and the rear end of the protective shell are both provided with ventilation slots, the top end of the protective shell is fixedly connected with a cover board, and the bottom end of the cover board is fixedly connected with an expansion assembly. The bottom end of the expansion assembly is fixedly connected with a heat dissipation assembly, the expansion assembly comprises a rubber sleeve, the inner side of the rubber sleeve is fixedly connected with a heat insulation rubber sheet, the inner side of the heat insulation rubber sheet is provided with a heat insulation groove, the heat dissipation assembly comprises a heat conduction silicone tube, the inner side of the heat conduction silicone tube is provided with a heat conduction channel, and the inner side of the heat conduction channel is fixedly connected with a copper bar and a copper ring. The device can perform effective heat dissipation treatment on electronic components with relatively high local heat in different models of PCBA board bodies, and prevents the PCBA board bodies from being in a high-temperature state for a long time to cause damage to the components, so that the service life of the PCBA board bodies is remarkably prolonged.

The invention discloses a moving iron unit, a hearing aid and an assembling method of the moving iron unit. The moving iron unit comprises a magnet yoke, a first magnet, a second magnet, a driving assembly, an induction coil, a vibration unit and a support. A cavity is defined by the magnet yoke, the first magnet and the second magnet are arranged in the cavity, and a gap is formed between the first magnet and the second magnet; the induction coil has a central hole; the driving assembly comprises a balance armature and a driving rod, the balance armature penetrates through the center hole and the interval in a suspended mode, and the driving rod is connected with the balance armature and the vibration unit. The driving assembly drives the vibration unit to vibrate under the condition that the induction coil is electrified; the magnet yoke and the induction coil are limited on the bracket, so that the connection condition of the driving rod and the vibration unit / balance armature can be conveniently checked in the assembling process of the moving iron unit; and meanwhile, the magnet yoke and the induction coil are respectively isolated from the shell of the moving iron unit by the bracket, so that noise and squeal can be reduced from the source.

The application relates to the field of refrigerator refrigeration compressor motors, and is a refrigerator motor stator and a motor manufacturing process method, which comprises a stator core and a coil, the stator core is formed with a core slot, the coil is arranged in the core slot and covers the upper and lower two end faces of the stator core, the upper and lower two end faces of the stator core and the inner surface of the core slot are uniformly sprayed with an insulating material film, the film thickness is between 0.15-0.25 mm, and the part of the coil extending to the outside of the core slot is attached to the upper and lower end faces of the core. According to the application, the insulating paper in the wire slot is replaced by the sprayed insulating film, meanwhile, the upper and lower end faces of the stator core are also sprayed with the insulating film, the part of the coil extending to the outside of the wire slot can be closer to the upper and lower end faces of the stator core or attached to the end faces of the core, and therefore the length of the coil in the core is shortened.

This invention discloses a resonant circuit, a PCB board, and a controller, including a power inverter unit, an upper bridge arm resonant pre-charge unit, a lower bridge arm resonant pre-charge unit, an upper bridge arm buffer unit, and a lower bridge arm buffer unit. The input terminal of the upper bridge arm resonant pre-charge unit is connected to an external DC input terminal, and the output terminal of the upper bridge arm resonant pre-charge unit is connected to the power inverter unit through the upper bridge arm buffer unit. The input terminal of the lower bridge arm resonant pre-charge unit is connected to a ground terminal, and the output terminal of the lower bridge arm resonant pre-charge unit is connected to the power inverter unit through the lower bridge arm buffer unit. By introducing an active clamping and pre-charge mechanism, the circuit can suppress voltage spikes to a lower level at the moment of turn-off. Compared with traditional passive RCD absorption technology, its voltage clamping value is more stable and less affected by load fluctuations, which reduces the voltage withstand burden of the switching transistor to a certain extent and improves the reliability of the circuit.