A dual pulse test platform

Abstract

The application relates to the technical field of double-pulse test platforms, and particularly discloses a double-pulse test platform which comprises a transparent protective box, a moving groove, a first sliding groove, a second sliding groove, a clamping groove, an expansion groove and a triggering mechanism, a moving groove in communication with the inner cavity of the transparent protective box is formed at the top left side of the transparent protective box, a first sliding groove is formed in the inner cavity of the transparent protective box at the left side of the front end along the up-down direction, second sliding grooves are formed in the left and right sides of the transparent protective box along the up-down direction, clamping grooves are formed in the inner cavity of the second sliding groove at the upper and lower ends of the inner side, an expansion groove is formed in the inner cavity of the transparent protective box at the middle of the rear side, and the triggering mechanism is arranged at the left side of the inner cavity of the transparent protective box. The device not only eliminates the risk of high-voltage electric shock caused by human negligence or operation failure, but also significantly improves the operation efficiency and safety through automatic discharge and safety interlocking, and provides a reliable, intuitive and intrinsically safe solution for double-pulse tests.

Description

Technical Field

[0001] This invention relates to the field of dual-pulse test platform technology, specifically a dual-pulse test platform. Background Technology

[0002] The double-pulse test is a core experimental method for evaluating the switching dynamic characteristics of power semiconductor devices. Its basic principle is to apply two controllable pulse signals to make the device under test perform one turn-on and one turn-off operation under specific current conditions, and use high-speed measurement equipment to capture the voltage and current waveforms at the moment of turn-off or turn-on, thereby accurately extracting key parameters such as the switching speed, switching loss and voltage and current stress of the device. This test is an indispensable part of the research and development of power electronic devices, device selection and reliability verification.

[0003] The dual-pulse test platform is a dedicated device for performing the above tests. Its core is the dual-pulse test board, which integrates a pulse generator, drive circuit, mounting position of the device under test, power inductor, freewheeling diode and measurement interface. The high-voltage DC bus provides energy input to the test platform and is a conductive path connecting the DC power supply, supporting capacitor and device under test. To meet the strict requirements of low parasitic inductance and low loop resistance for high-frequency switching tests, and to facilitate the connection of measurement probes and replacement of devices under test, the high-voltage bus in the platform is often in the form of exposed copper busbar or copper-clad laminate, without complete insulation encapsulation.

[0004] However, this exposed high-voltage bus design brings significant safety hazards. First, during the power-on operation of the platform, the exposed bus usually carries a DC high voltage of hundreds to thousands of volts. Direct contact with the human body will lead to serious electric shock accidents. More insidious and dangerous is that even after the test is completed and the external power is actively cut off, the high-voltage bus will maintain a lethal high voltage for a period of time because the supporting capacitor on the dual-pulse test board or the parasitic capacitance of the device under test itself still stores a large amount of charge. This is because the essence of a capacitor is to store electrical energy. Power outage only means the stop of energy input. If there is no discharge path, the stored electrical energy will remain for a long time. If the operator mistakenly believes that power outage means safety and directly touches the bus or replaces the device, he will suffer electric shock.

[0005] Existing dual-pulse test platforms primarily rely on manual safety procedures to mitigate the aforementioned risks. Typical operating procedures require operators to wait a sufficient amount of time after disconnecting the power to allow the parallel fixed bleeder resistor to slowly discharge, or to manually verify with a multimeter that the bus voltage has dropped to a safe threshold. In some cases, experienced operators may even need to manually discharge the voltage using specialized discharge tools before opening the protective device to access the internal components. This process has significant shortcomings: firstly, it relies entirely on the operator's self-awareness and skill, making it easy to overlook discharge steps due to negligence in repetitive operations or emergency situations; secondly, the long discharge time of the built-in fixed bleeder resistor affects testing efficiency, and if the resistor fails, the system loses its discharge capability, creating a hidden risk. Therefore, existing technologies lack an intrinsically safe solution that can forcibly, automatically, safely, and quickly eliminate residual high-voltage energy before opening the protective device. Summary of the Invention

[0006] The purpose of this invention is to provide a dual-pulse testing platform to solve the problems in the prior art that rely on manual operation for high-voltage discharge, which is cumbersome and poses safety hazards, and cannot automatically, forcibly, and safely eliminate residual charge on the high-voltage busbar when the protective device is activated.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a dual-pulse testing platform, comprising: a transparent protective box, a movable groove, a first sliding groove, a second sliding groove, a locking groove, a telescopic groove, a triggering mechanism, a first slider, a tension groove, a transparent box door, a positioning component, a blocking component, a dual-pulse testing board, a high-voltage busbar, and a discharge component. The top left side of the transparent protective box has a movable groove communicating with its inner cavity. The front left side of the inner cavity of the transparent protective box has a first sliding groove extending vertically. The left and right sides of the transparent protective box both have second sliding grooves extending vertically. The inner sides of the inner cavities of the second sliding grooves have locking grooves at both the upper and lower ends. The rear middle of the inner cavity of the transparent protective box has a telescopic groove. The triggering mechanism is located on the left side of the inner cavity of the transparent protective box. There are two first sliders, which are slidably and compatiblely inserted into the bottom of the inner cavity of two second sliding grooves. A horizontally penetrating tensile groove is provided on the right side of the first slider, and the position of the tensile groove corresponds to the position of the slot located below. The left and right sides of the transparent box door are respectively located on the outside of the two first sliders. The positioning component is located in the inner cavity of the tensile groove, the blocking component is located in the inner cavity of the telescopic groove, the dual-pulse test board is placed at the bottom of the inner cavity of the transparent protective box, one end of the high-voltage busbar is electrically connected to the dual-pulse test board, and the discharge component is located in the inner cavity of the transparent protective box.

[0008] Preferably, the dual-pulse testing platform further includes: guide rods and positioning blocks; the number of guide rods is two, and the two guide rods are respectively disposed on the left and right rear sides of the transparent enclosure door; the number of positioning blocks is two, and the two positioning blocks are respectively disposed on the left and right top sides of the transparent protective enclosure; the two positioning blocks are slidably and appropriately matched to the top of the outer wall of the two guide rods.

[0009] Preferably, the triggering mechanism includes: a rack, a second slider, a rotating rod, and a gear. The rack is located at the rear left end of the transparent box door, and the top end of the rack is slidably fitted into the inner cavity of the moving groove. The second slider is located on the left side of the rack and is slidably fitted into the inner cavity of the first sliding groove. The rotating rod is rotatably located at the top front end of the left side of the inner cavity of the transparent protective box via a bearing. The gear is sleeved on the outer wall of the rotating rod and locked by a set screw. The gear and the rack mesh with each other, and the number of teeth on the outer wall of the gear is the same as the number of teeth on the rack.

[0010] Preferably, the triggering mechanism further includes: a cam, a first trigger rod, a second trigger rod, a third spring, a roller, a first button switch, and a second button switch. The cam is sleeved on the right side of the outer wall of the rotating rod and locked. The first trigger rod is slidably and compatiblely inserted into the top left side of the inner cavity of the transparent protective box. The second trigger rod is slidably and compatiblely inserted into the top left side of the inner cavity of the transparent protective box. The second trigger rod is located below the first trigger rod. There are two third springs, which are respectively sleeved on the outer walls of the first and second trigger rods, and one end of each third spring is respectively engaged with the first trigger rod. The outer wall of the first trigger rod and the outer wall of the second trigger rod, and the other ends of the two third springs are both engaged with the inner wall of the transparent protective box. There are two rollers, which are rotatably disposed at the front ends of the first trigger rod and the second trigger rod, respectively. The outer wall of the rollers is in contact with the outer wall of the cam. The first button switch is disposed on the rear side of the top left side of the inner cavity of the transparent protective box. The position of the first button switch corresponds to the position of the first trigger rod. The first button switch is electrically connected to the high voltage bus. The second button switch is disposed on the rear side of the top left side of the inner cavity of the transparent protective box. The position of the second button switch corresponds to the position of the second trigger rod.

[0011] Preferably, the positioning component includes: a locking pin and a first spring. There are two locking pins, which are slidably fitted into the inner cavities of two stretching grooves. The inner ends of the locking pins are slidably fitted into the inner cavities of the corresponding slots. The outer ends of the locking pins slidably extend outward from the outer side of the transparent door. The first spring is sleeved on the outer wall of the locking pin, with one end of the first spring clamped to the outer wall of the locking pin and the other end of the first spring clamped to the inner wall of the stretching groove.

[0012] Preferably, the blocking assembly includes: a blocking post, a second spring, a permanent magnet, and an electromagnet. There are two blocking posts, each slidably and compatiblely inserted into the inner cavity of one of the two telescopic grooves. The second spring is sleeved on the outer wall of the blocking post, with one end of the second spring engaged with the outer wall of the blocking post and the other end engaged with the inner wall of the telescopic groove. The permanent magnet is located on the rear side of the blocking post, and the electromagnet is located on the rear side of the inner cavity of the telescopic groove. The position of the electromagnet corresponds to the position of the permanent magnet. When energized, the electromagnet and the permanent magnet repel each other due to their similar polarities.

[0013] Preferably, a first high-voltage DC contactor is also provided in the inner cavity of the transparent protective box. One end of the first high-voltage DC contactor is electrically connected to the high-voltage busbar through a wire, and the other end of the first high-voltage DC contactor is electrically connected to an electromagnet through a wire. The first high-voltage DC contactor and the second push-button switch are electrically connected.

[0014] Preferably, after the second button switch is triggered, the first high-voltage DC contactor is connected to detect the residual voltage of the high-voltage bus. If there is residual voltage, the electromagnet is energized and generates a repulsive force with the permanent magnet, pushing the blocking post to extend to the second slide groove to block the transparent box door. If there is no residual voltage, the electromagnet is de-energized, and the blocking post is reset by the second spring and retracted into the telescopic groove to unlock.

[0015] Preferably, the discharge assembly includes: a second high-voltage DC contactor and a wire-wound resistor. The second high-voltage DC contactor is disposed at the bottom of the inner cavity of the transparent protective box. One end of the second high-voltage DC contactor is electrically connected to the high-voltage busbar via a wire. The second high-voltage DC contactor and the second push-button switch are electrically connected. The positive terminal of the wire-wound resistor is electrically connected to the other end of the second high-voltage DC contactor via a wire. The negative terminal of the wire-wound resistor is electrically connected to the grounding stake.

[0016] Preferably, after the second push-button switch is triggered, the second high-voltage DC contactor closes, and the residual charge of the high-voltage busbar and the double-pulse test board capacitor is conducted to the grounding pile through the wire-wound resistor, thus completing the safe discharge.

[0017] The dual-pulse testing platform proposed in this invention has the following advantages:

[0018] 1. This invention drives the triggering mechanism to work through the opening and closing action of the transparent box door. When the operator opens the door upward, the mechanism first triggers the first button switch, instantly cutting off the main power input of the high-voltage bus, thereby physically cutting off the energy supply from the source of operation, creating the preconditions for subsequent safe discharge, and preventing new power input from interfering with the discharge process.

[0019] 2. After the power-off command is executed, the triggering mechanism continues to drive the cam to rotate, which then triggers the second button switch. This signal controls the second high-voltage DC contactor to close, so that the high-voltage busbar forms a grounding discharge circuit through the wire-wound resistor. This achieves automatic, rapid and controlled discharge of high-voltage residual charge. The current-limiting effect of the wire-wound resistor avoids the dangerous arc and impact of short-circuit discharge, ensuring the safety and reliability of the discharge process.

[0020] 3. When the discharge action is initiated, the system energizes the electromagnet through the first high-voltage DC contactor. The electromagnet interacts with the permanent magnet to push the blocking column out. If the bus voltage is not completely discharged, the electromagnet will continue to be energized, keeping the blocking column in the extended state. The physical blocking box door continues to open, thus providing an active safety verification and forced locking mechanism. It transforms the electrical state of whether the voltage has been completely discharged into a direct physical feedback on whether the door can be opened, fundamentally eliminating the possibility of subsequent operations in a energized state and achieving intrinsic safety.

[0021] 4. When the discharge is completely completed and the bus voltage disappears, the electromagnet is de-energized, and the blocking column retracts under the action of the spring, releasing the obstruction to the box door. This allows the operator to fully open the box door and perform component replacement or maintenance, thus ensuring that full contact with the equipment interior is only permitted after confirming that the interior is absolutely safe, providing the operator with ultimate safety assurance.

[0022] 5. When the operator completes maintenance and closes the enclosure door, the triggering mechanism operates in the reverse order: first disconnecting the discharge circuit, then restoring the main power supply, thereby restoring the platform to the test-ready state. At the same time, it ensures that the discharge circuit has been reliably disconnected before the test begins, avoiding any impact on the test accuracy and ensuring the integrity of the test function.

[0023] 6. This device not only eliminates the risk of high-voltage electric shock due to human negligence or operational errors, but also significantly improves operational efficiency and safety through automatic discharge and safety interlocking, providing a reliable, intuitive and inherently safe solution for dual-pulse testing. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is an exploded view of the present invention;

[0026] Figure 3 A diagram illustrating the trigger mechanism;

[0027] Figure 4 Exploded view of the trigger mechanism;

[0028] Figure 5 for Figure 2 Enlarged view of point A;

[0029] Figure 6 for Figure 2 Enlarged view of point B;

[0030] Figure 7 for Figure 2 Enlarged view of point C;

[0031] Figure 8 for Figure 2 Enlarged view of point D;

[0032] Figure 9 for Figure 2 Enlarged view of point E;

[0033] Figure 10 for Figure 2 Enlarged view at point F;

[0034] Figure 11 for Figure 4 Enlarged view of point G;

[0035] Figure 12 for Figure 4 Enlarged view of point H.

[0036] In the diagram: 1. Transparent protective box; 2. Moving groove; 3. First sliding groove; 4. Second sliding groove; 5. Slot; 6. Telescopic groove; 7. Triggering mechanism; 71. Rack; 72. Second slider; 73. Rotating rod; 74. Gear; 75. Cam; 76. First trigger rod; 77. Second trigger rod; 78. Third spring; 79. Roller; 710. First push-button switch; 711. Second push-button switch; 8. First slider; 9. Tension groove; 10. Transparent box door; 11. Guide rod; 12. Positioning block; 13. Locking post; 14. First spring; 15. Blocking post; 16. Second spring; 17. Permanent magnet; 18. Electromagnet; 19. Double pulse test board; 20. High voltage busbar; 21. First high voltage DC contactor; 22. Second high voltage DC contactor; 23. Wire-wound resistor. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see Figures 1-12This invention provides a dual-pulse testing platform technical solution, comprising: a transparent protective box 1, a moving groove 2, a first sliding groove 3, a second sliding groove 4, a slot 5, a telescopic groove 6, a triggering mechanism 7, a first slider 8, a tension groove 9, a transparent box door 10, a guide rod 11, a positioning block 12, a positioning component, a blocking component, a dual-pulse testing board 19, a high-voltage busbar 20, and a discharge component. The top left side of the transparent protective box 1 has a moving groove 2 communicating with its inner cavity. The front left side of the inner cavity of the transparent protective box 1 has a first sliding groove 3 along the vertical direction. The left and right sides of the transparent protective box 1 both have second sliding grooves 4 along the vertical direction. The inner sides of the inner cavities of the second sliding grooves 4 have slots 5 at both the upper and lower ends. The middle rear side of the inner cavity of the transparent protective box 1 has a telescopic groove 6. The protective enclosure 1 serves as the safety shell and mechanical load-bearing body of the entire test platform. Its transparent material facilitates observation of the internal test status and component movements. Various slots and cavities within the enclosure provide precise guidance and installation space for other moving parts. The trigger mechanism 7 is located on the left side of the inner cavity of the transparent protective enclosure 1. The trigger mechanism 7 can trigger electrical switches according to a preset phase sequence. There are two first sliders 8, which are slidably and compatiblely inserted into the bottom of the inner cavities of two second sliding grooves 4. A through-type tension groove 9 is provided on the right side of each first slider 8, and the position of the tension groove 9 corresponds to the position of the slot 5 located below. The first slider 8 is a sliding connector between the transparent enclosure door 10 and the second sliding grooves 4. The left and right sides of the transparent enclosure door 10 are respectively... Located on the outside of the two first sliders 8, the transparent door 10 is not only a physical protective door but also the master switch for the entire safety process. Its switching action is the initial input that triggers a series of subsequent mechanical and electrical safety operations. There are two guide rods 11, which are respectively located on the rear sides of the left and right ends of the transparent door 10. There are also two positioning blocks 12, which are respectively located on the top of the left and right sides of the transparent protective box 1. The two positioning blocks 12 are slidably and appropriately matched to the top of the outer wall of the two guide rods 11. The guide rods 11 and the positioning blocks 12 together constitute the auxiliary guiding and limiting structure at the top of the transparent door 10, which can enhance the stability of the transparent door 10 when moving up and down and prevent jamming or tilting caused by unilateral force. The positioning component, located within the tensile groove 9, enables rapid locking and releasing of the transparent door 10 without tools, ensuring the stability of the door 10 during testing or maintenance. The blocking component, located within the telescopic groove 6, determines whether to allow or prevent the transparent door 10 from fully opening based on whether the high-voltage busbar 20 is energized. This is a key execution and feedback mechanism for achieving the inherent safety principle of "no opening without discharge." The dual-pulse test board 19, placed at the bottom of the transparent protective enclosure 1, is a prior art device and serves as the core functional carrier of the platform. It carries all the necessary circuitry for testing, including pulse generation, driving, the device under test, power inductors, and measurement interfaces, and is the electrical main body for performing dual-pulse testing.One end of the high-voltage busbar 20 is electrically connected to the dual-pulse test board 19. The high-voltage busbar 20 provides an energy transmission channel for the high-voltage DC power supply to the dual-pulse test board 19 and is also the object of capacitor energy storage and safe discharge. The discharge component is located inside the transparent protective box 1. After receiving a trigger signal, the discharge component quickly and safely discharges the electrical energy stored in the busbar capacitor in a controllable manner.

[0039] As a preferred embodiment, the triggering mechanism 7 further includes: a rack 71, a second slider 72, a rotating rod 73, a gear 74, a cam 75, a first trigger rod 76, a second trigger rod 77, a third spring 78, a roller 79, a first button switch 710, and a second button switch 711. The rack 71 is located at the rear left end of the transparent door 10, and the top end of the rack 71 is slidably fitted into the inner cavity of the moving groove 2. The rack 71 serves as the input end for motion conversion, precisely and one-to-one converting the linear lifting motion of the transparent door 10 into rotational motion. The second slider 72 is located on the left side of the rack 71 and is slidably fitted into the inner cavity of the first sliding groove 3. The second slider 72 and the first sliding groove 3 constitute an auxiliary mechanism for the rack 71. The guide pair, together with the moving groove 2, ensures that the rack 71 moves strictly in the vertical direction, preventing it from shifting or jamming when meshing with the gear 74, thus ensuring smooth and reliable transmission. The rotating rod 73 is rotatably mounted on the top front end of the left side of the inner cavity of the transparent protective box 1 via a bearing. The rotating rod 73 is the central shaft for transmission and distribution, transmitting the rotational motion received by the gear 74 to the cam 75, and is the hub for mechanical energy transmission. The gear 74 is sleeved on the outer wall of the rotating rod 73 and locked by a set screw. The gear 74 and the rack 71 mesh, and the number of teeth on the outer wall of the gear 74 is the same as the number of teeth on the rack 71. The gear 74 is a motion converter, capable of converting the linear displacement of the transparent box door 10 into the angular displacement of the rotating rod 73 proportionally without slippage. The transmission ratio is fixed, ensuring... To ensure a strict correspondence between the mechanical trigger phase and the door position, cam 75 is sleeved on the right side of the outer wall of rotating rod 73 and locked. Cam 75 is the core of sequential control and motion programming. Its specific contour surface determines the order and stroke of the two trigger rods being pushed, which is equivalent to the safety logic of "power off first, then discharge when opening the door, and power off first, then supply power when closing the door". It is a key component for realizing irreversible sequential control. The lifting and lowering of the transparent door 10 drives the rack 71 to move linearly. Through the meshing of rack 71 and gear 74, the rotating rod 73 and cam 75 are driven to rotate synchronously, realizing the conversion from linear motion to rotational motion. The first trigger rod 76 is slidably fitted and inserted into the top left side of the inner cavity of the transparent protective box 1, and the second trigger rod 77 is slidably fitted and inserted into the top left side of the inner cavity of the transparent protective box 1. Inserted into the top left side of the inner cavity of the transparent protective box 1, the second trigger rod 77 is located below the first trigger rod 76. The first trigger rod 76 and the second trigger rod 77 are mechanical actuators for electrical commands. They convert the contour motion of the cam 75 into its own linear motion, which in turn presses the corresponding button switch, converting the mechanical action into an electrical signal. There are two third springs 78, which are respectively sleeved on the outer walls of the first trigger rod 76 and the second trigger rod 77. One end of each third spring 78 is respectively engaged with the outer walls of the first trigger rod 76 and the second trigger rod 77, and the other end of each third spring 78 is engaged with the inner wall of the transparent protective box 1. The third springs 78 are rotary springs, which undergo elastic deformation after being compressed or stretched by external force.After the external force is removed, the system returns to its initial state. The third spring 78 serves as the reset and preload element for the trigger rod, ensuring that the roller 79 remains in close contact with the contour of the cam 75, eliminating transmission backlash. Simultaneously, it quickly resets after being released by the cam 75, preparing for the next triggering action. There are two rollers 79, rotatably positioned at the front ends of the first trigger rod 76 and the second trigger rod 77, respectively. The outer wall of the roller 79 contacts the outer wall of the cam 75. The roller 79 acts as an intermediate transmission component between the cam 75 and the trigger rod, converting sliding friction into rolling friction. This significantly reduces frictional resistance and wear during the movement of the cam 75, making the action smoother and more reliable, and extending the service life of the cam and trigger rod. The first push-button switch 710 is located at... On the rear left side of the inner cavity of the transparent protective box 1, the position of the first push-button switch 710 corresponds to the position of the first trigger rod 76. The first push-button switch 710 is electrically connected to the high-voltage bus 20. The first push-button switch 710 is a power control switch, and its on / off state directly controls the connection and disconnection of the main power circuit of the high-voltage bus 20. It is a direct electrical switch for executing power-off and power-on commands. The second push-button switch 711 is located on the rear left side of the inner cavity of the transparent protective box 1. The position of the second push-button switch 711 corresponds to the position of the second trigger rod 77. The second push-button switch 711 is a discharge and safety interlock control switch. Its on / off state simultaneously controls the operation of the discharge component and the blocking component. It is the master control electrical switch for initiating the safe discharge process and the safety verification logic.

[0040] As a preferred embodiment, the positioning assembly further includes: two locking pins 13 and a first spring 14. The two locking pins 13 are slidably fitted into the inner cavities of the two tension grooves 9, respectively. The inner ends of the locking pins 13 are slidably fitted into the inner cavities of the corresponding slots 5. The outer ends of the locking pins 13 slidably extend outwards from the outer side of the transparent door 10. The locking pins 13 serve as the latches of a mechanical lock; their inner ends are designed to engage with the slots 5 on the transparent protective box 1 to achieve rigid locking, and their outer ends extend outwards... The transparent door 10 is located on the outside, making it easy for the operator to apply force manually. The lateral sliding of the locking pin 13 enables the switching between the locked engagement and disengagement states. The first spring 14 is sleeved on the outer wall of the locking pin 13. One end of the first spring 14 is engaged with the outer wall of the locking pin 13, and the other end of the first spring 14 is engaged with the inner wall of the stretching groove 9. The first spring 14 is a rotary spring. It undergoes elastic deformation after being squeezed or stretched by external force, and returns to its initial state after the external force is removed. The first spring 14 provides the automatic reset and locking force for the locking pin 13.

[0041] As a preferred embodiment, the blocking assembly further includes: a blocking post 15, a second spring 16, a permanent magnet 17, an electromagnet 18, and a first high-voltage DC contactor 21. There are two blocking posts 15, each slidably and compatiblely inserted into the inner cavity of one of the two telescopic grooves 6. The blocking post 15 is a physical actuator for safety locking; when extended, it inserts into the movement path of the first slider 8, forming a rigid mechanical block to forcibly prevent the transparent door 10 from continuing to move; when retracted, it releases the blockage, allowing the transparent door 10 to pass freely. The second spring 16 is sleeved on the outer wall of the blocking post 15, with one end of the second spring 16 engaged with the outer wall of the blocking post 15 and the other end engaged with the inner wall of the telescopic groove 6. Spring 16 is a rotary spring that undergoes elastic deformation after being compressed or stretched by external force, and returns to its initial state after the external force is removed. Spring 16 is the safety reset drive element for the blocking post 15. When electromagnet 18 is de-energized, the spring force ensures that the blocking post retracts quickly and reliably, releasing the lock and returning the system to its default safe state. Permanent magnet 17 is located on the rear side of the blocking post 15. Permanent magnet 17 is existing technology and serves as the passive response end of electromagnet 18, forming a magnetic force pair with electromagnet 18. It directly converts the on / off state of the circuit of electromagnet 18 into a thrust acting on the blocking post 15. Electromagnet 18 is located on the rear side of the inner cavity of the telescopic groove 6, and its position corresponds to the position of permanent magnet 17. Electromagnet 18, when energized, repels the permanent magnet 17 due to their similar polarity. Electromagnet 18 is existing technology. The energization of electromagnet 18 is controlled by the residual voltage of the high-voltage bus 20 via the first high-voltage DC contactor 21. When energized, it generates a repulsive force with the permanent magnet 17, overcoming the elastic force of the second spring 16 and pushing the blocking post 15 outwards to perform locking. When de-energized, the repulsive force disappears, and the system unlocks. The first high-voltage DC contactor 21 is located inside the transparent protective box 1. One end of the first high-voltage DC contactor 21 is electrically connected to the high-voltage bus 20 via a wire, and the other end of the first high-voltage DC contactor 21 is electrically connected to electromagnet 18 via a wire. The first high-voltage DC contactor 21 is electrically connected to the second push-button switch 711. Contactor 21 is existing technology. The first high-voltage DC contactor 21 is a key electrical switch for high-voltage detection and safety logic control. It is used to detect whether there is residual voltage on the high-voltage bus 20. When its coil is energized and attracted by the second push-button switch 711, if there is still high voltage on the high-voltage bus 20, its main contacts close, supplying power to the electromagnet 18 and triggering the interlock. If the bus has discharged to a safe voltage, the first high-voltage DC contactor 21 is attracted but no current flows, and the electromagnet 18 does not operate. This design realizes an automatic safety judgment logic of locking when there is pressure and opening when there is no pressure. After the second push-button switch 711 is triggered, the first high-voltage DC contactor 21 is connected and detects the residual voltage on the high-voltage bus 20. When there is residual voltage, the electromagnet 18 is energized and generates a repulsive force with the permanent magnet 17.Pushing the blocking post 15 to extend it into the second slide groove 4 to block the transparent box door 10, when there is no residue, the electromagnet 18 is de-energized, and the blocking post 15 is reset by the second spring 16 and retracted into the telescopic groove 6 to unlock.

[0042] As a preferred embodiment, the discharge assembly further includes: a second high-voltage DC contactor 22 and a wire-wound resistor 23. The second high-voltage DC contactor 22 is located at the bottom of the inner cavity of the transparent protective box 1. One end of the second high-voltage DC contactor 22 is electrically connected to the high-voltage busbar 20 via a wire. The second high-voltage DC contactor 22 is electrically connected to the second push-button switch 711. The second high-voltage DC contactor 22 is existing technology and serves as an intelligent "switch" and isolator for the safe discharge circuit. It is controlled by a triggering mechanism, closing rapidly when discharge is needed and reliably opening during testing or standby, ensuring complete electrical isolation between the discharge circuit and the high-voltage main circuit, avoiding any interference with test accuracy or introducing additional losses. The positive terminal of the wire-wound resistor 23 is connected to the second high-voltage DC contactor via a wire. The other end of 22 is electrically connected, and the negative terminal of the wire-wound resistor 23 is electrically connected to the grounding stake. After the second push-button switch 711 is triggered, the second high-voltage DC contactor 22 closes. The residual charge of the capacitors of the high-voltage bus 20 and the double-pulse test board 19 is conducted to the grounding stake through the wire-wound resistor 23 to complete the safe discharge. The wire-wound resistor 23 is a prior art technology. The wire-wound resistor 23 is the core load and current-limiting element for energy discharge. Its precisely calculated resistance value can limit the initial discharge current within a safe range to avoid generating destructive short-circuit current and arc. During the discharge process, it efficiently and steadily converts the electric field energy stored in the capacitor on the high-voltage bus 20 into heat energy and dissipates it. It is the key to achieving fast and controllable discharge. Its negative terminal is reliably grounded, providing a definite and safe final discharge path for dangerous charges.

[0043] Its detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and the specific work is as follows.

[0044] Step 1: In use, connect the high-voltage busbar 20 to the main power supply. Pull the two locking pins 13 outwards. The outward movement of the two locking pins 13 compresses the first spring 14, causing elastic deformation, until the locking pins 13 disengage from the inner cavity of the locking slot 5. Pull the two locking pins 13 upwards, thereby using the locking pins 13 to drive the transparent door 10 upwards. The upward movement of the transparent door 10 drives the rack 71 upwards, which in turn drives the gear 74 to rotate the rotating rod 73 clockwise. This rotation of the rotating rod 73 then drives the cam 75 to rotate clockwise. As the cam 75 rotates clockwise, it pushes the first trigger rod 76 and the second trigger rod 77 to move backwards and compress... The third spring 78 undergoes elastic deformation. As the cam 75 rotates clockwise, the first trigger rod 76 first contacts the first push button switch 710 and presses it, thereby de-energizing the high-voltage bus 20. As the cam 75 rotates clockwise, the third spring 78 pushes the first trigger rod 76 forward, causing the second trigger rod 77 to contact the second push button switch 711 and press it. This closes the connection between the two terminals of the first high-voltage DC contactor 21 and the two terminals of the second high-voltage DC contactor 22, connecting the circuit. Since the negative terminal of the wire-wound resistor 23 is electrically connected to the grounding stake, the double-pulse measurement... The voltage stored in the capacitor on the test plate 19 will be discharged to ground through the wire-wound resistor 23 and the wire. Furthermore, the closed connection of the two terminals of the first high-voltage DC contactor 21 will cause the electromagnet 18 circuit to be connected, used to detect whether the voltage stored in the capacitor on the double-pulse test plate 19 is completely discharged. If it is not completely discharged, a residual voltage will remain on the high-voltage bus 20, thus energizing the electromagnet 18. When energized, the electromagnet 18, under the influence of magnetic force, will repel the permanent magnet 17, thereby pushing the blocking post 15 forward into the inner cavity of the second slide groove 4, and compressing the second spring 16 to deform. This allows the blocking post 15, which has moved into the inner cavity of the second slide groove 4, to block the first slider 8, thus enabling... To prevent the transparent door 10 from sliding upwards and to increase operational safety, when the voltage stored in the capacitor on the dual-pulse test board 19 is completely discharged, the electromagnet 18 is de-energized. Under the elastic force of the second spring 16, the blocking post 15 will be pushed into the inner cavity of the telescopic groove 6 until the blocking post 15 returns to its initial state, thereby releasing the obstruction of the first slider 8. This allows the transparent door 10 to continue sliding upwards until the locking post 13 moves to the upper locking groove 5. Pushing the two locking posts 13 inwards will cause the inner ends of the two locking posts 13 to move into the inner cavity of the upper locking groove 5, and cause the first spring 14 to return to its initial state for positioning the transparent door 10.

[0045] Step 2: Install the semiconductor device to be tested onto the dual-pulse test board 19 and connect the circuit. After the connection is completed, pull the two locking posts 13 outwards. The outward movement of the two locking posts 13 compresses the first spring 14, causing elastic deformation, until the locking posts 13 disengage from the inner cavity of the slot 5. Pull the two locking posts 13 downwards, thereby using the locking posts 13 to drive the transparent door 10 downwards, which in turn drives the rack 71 downwards. The downward movement of the rack 71, under the action of the gear 74 and the rotating rod 73, drives the cam 75 to rotate counterclockwise. As the cam 75 rotates counterclockwise, it pushes the first trigger rod 76 and the second trigger rod 77 to move backwards, compressing the third spring 78 and causing elastic deformation. As the cam 75 rotates counterclockwise, the second trigger rod 77 will first contact the second button switch 711 and press the second button switch 711. The push-button switch 711 causes the two terminals of the first high-voltage DC contactor 21 and the two terminals of the second high-voltage DC contactor 22 to separate, thus breaking the circuit. As the cam 75 rotates counterclockwise, the second trigger rod 77 is pushed forward by the elastic force of the third spring 78, and the first trigger rod 76 is pushed backward to contact the first push-button switch 710. The first push-button switch 710 is pressed, and the high-voltage bus 20 is energized, so that the semiconductor device mounted on the double-pulse test board 19 can be tested with a double pulse until the locking pin 13 moves to the lower locking slot 5. Pushing the two locking pins 13 inward causes the inner ends of the two locking pins 13 to move into the inner cavity of the lower locking slot 5, and causes the first spring 14 to return to its initial state for positioning the transparent door 10. After the test is completed, the above actions are repeated.

[0046] This device not only eliminates the risk of high-voltage electric shock due to human negligence or operational errors, but also significantly improves operational efficiency and safety through automatic discharge and safety interlocking, providing a reliable, intuitive, and inherently safe solution for dual-pulse testing.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-pulse testing platform, characterized in that, include: A transparent protective box (1) has a movable groove (2) connected to its inner cavity on the left side of the top of the transparent protective box (1). A first sliding groove (3) is provided on the front left side of the inner cavity of the transparent protective box (1) along the vertical direction. A second sliding groove (4) is provided on both the left and right sides of the transparent protective box (1) along the vertical direction. A slot (5) is provided at both the upper and lower ends of the inner cavity of the second sliding groove (4). A telescopic groove (6) is provided in the middle of the rear side of the inner cavity of the transparent protective box (1). Triggering mechanism (7), wherein the triggering mechanism (7) is disposed on the left side of the inner cavity of the transparent protective box (1); The first slider (8) has two sliders. The two first sliders (8) are slidably and compatiblely inserted into the bottom of the inner cavity of the two second slide grooves (4). The right side of the first slider (8) is provided with a stretching groove (9) that runs through the left and right sides. The position of the stretching groove (9) corresponds to the position of the slot (5) located below. A transparent box door (10) is provided on the left and right sides of the two first sliders (8), respectively. A positioning component is disposed in the inner cavity of the stretch groove (9); A blocking assembly is disposed in the inner cavity of the telescopic groove (6); A double-pulse test board (19) is placed at the bottom of the inner cavity of a transparent protective box (1). High voltage bus (20), one end of which is electrically connected to the dual-pulse test board (19); A discharge assembly is disposed in the inner cavity of a transparent protective box (1); The triggering mechanism (7) includes: A rack (71) is provided on the rear left side of the transparent box door (10), and the top end of the rack (71) is slidably adapted to be inserted into the inner cavity of the moving groove (2). The second slider (72) is located on the left side of the rack (71) and is slidably adapted to be inserted into the inner cavity of the first slide groove (3). Rotating rod (73), which is rotatably mounted on the top front end of the left side of the inner cavity of the transparent protective box (1) via a bearing; Gear (74), the gear (74) is sleeved on the outer wall of the rotating rod (73) and locked by a set screw. The gear (74) meshes with the rack (71). The number of teeth on the outer wall of the gear (74) is the same as the number of teeth on the rack (71). Cam (75), which is sleeved on the right side of the outer wall of the rotating rod (73) and locked; The first trigger rod (76) is slidably and compatiblely inserted into the top left side of the inner cavity of the transparent protective box (1); The second trigger rod (77) is slidably and compatiblely inserted into the top left side of the inner cavity of the transparent protective box (1). The second trigger rod (77) is located below the first trigger rod (76). The third spring (78) has two parts. The two third springs (78) are respectively sleeved on the outer walls of the first trigger rod (76) and the second trigger rod (77). One end of the two third springs (78) is respectively snapped into the outer walls of the first trigger rod (76) and the second trigger rod (77), and the other end of the two third springs (78) is snapped into the inner wall of the transparent protective box (1). Roller (79), there are two rollers (79), the two rollers (79) are rotatably disposed at the front end of the first trigger rod (76) and the second trigger rod (77), and the outer wall of the roller (79) is in contact with the outer wall of the cam (75); The first button switch (710) is located on the rear side of the top left side of the inner cavity of the transparent protective box (1). The position of the first button switch (710) corresponds to the position of the first trigger rod (76). The first button switch (710) is electrically connected to the high voltage bus (20). The second button switch (711) is located on the rear side of the top left side of the inner cavity of the transparent protective box (1), and the position of the second button switch (711) corresponds to the position of the second trigger rod (77).

2. The dual-pulse test platform according to claim 1, characterized in that, The dual-pulse testing platform also includes: Guide rod (11), there are two guide rods (11), and the two guide rods (11) are respectively set on the left and right rear sides of the transparent box door (10); Positioning blocks (12), there are two positioning blocks (12), the two positioning blocks (12) are respectively set on the top of the left and right sides of the transparent protective box (1), and the two positioning blocks (12) are slidably matched with the top of the outer wall of the two guide rods (11).

3. The dual-pulse test platform according to claim 2, characterized in that, The positioning component includes: Two locking posts (13) are provided. The two locking posts (13) are slidably and compatiblely inserted into the inner cavities of the two stretching grooves (9). The inner end of the locking post (13) is slidably and compatiblely inserted into the inner cavity of the corresponding locking groove (5). The outer end of the locking post (13) is slidably extended out of the outer side of the transparent box door (10). The first spring (14) is sleeved on the outer wall of the locking post (13), one end of the first spring (14) is locked on the outer wall of the locking post (13), and the other end of the first spring (14) is locked on the inner wall of the stretching groove (9).

4. The dual-pulse test platform according to claim 3, characterized in that, The blocking component includes: The number of the two blocking posts (15) is two, and the two blocking posts (15) are slidably adapted to be inserted into the inner cavity of the two telescopic grooves (6); The second spring (16) is sleeved on the outer wall of the blocking post (15), one end of the second spring (16) is clamped on the outer wall of the blocking post (15), and the other end of the second spring (16) is clamped on the inner wall of the telescopic groove (6). A permanent magnet (17) is disposed on the rear side of the blocking post (15); An electromagnet (18) is located on the rear side of the inner cavity of the telescopic groove (6). The position of the electromagnet (18) corresponds to the position of the permanent magnet (17). When the electromagnet (18) is energized, it and the permanent magnet (17) repel each other.

5. A dual-pulse test platform according to claim 4, characterized in that, The transparent protective box (1) is also equipped with a first high voltage DC contactor (21). One end of the first high voltage DC contactor (21) is electrically connected to the high voltage bus (20) through a wire, and the other end of the first high voltage DC contactor (21) is electrically connected to the electromagnet (18) through a wire. The first high voltage DC contactor (21) is electrically connected to the second push button switch (711).

6. A dual-pulse test platform according to claim 5, characterized in that, After the second button switch (711) is triggered, the first high-voltage DC contactor (21) is connected and detects the residual voltage of the high-voltage bus (20). When there is residual voltage, the electromagnet (18) is energized and generates a repulsive force with the permanent magnet (17), pushing the blocking column (15) to extend to the second slide groove (4) to block the transparent box door (10). When there is no residual voltage, the electromagnet (18) is de-energized and the blocking column (15) is reset by the second spring (16) and retracted into the telescopic groove (6) to unlock.

7. A dual-pulse test platform according to claim 6, characterized in that, The discharge assembly includes: The second high voltage DC contactor (22) is located at the bottom of the inner cavity of the transparent protective box (1). One end of the second high voltage DC contactor (22) is electrically connected to the high voltage bus (20) through a wire. The second high voltage DC contactor (22) is electrically connected to the second push button switch (711). The wire-wound resistor (23) has its positive terminal electrically connected to the other end of the second high-voltage DC contactor (22) via a wire, and its negative terminal electrically connected to the grounding stake.

8. A dual-pulse test platform according to claim 7, characterized in that, After the second push button switch (711) is triggered, the second high-voltage DC contactor (22) closes, and the residual charge of the capacitor of the high-voltage bus (20) and the double pulse test board (19) is conducted to the grounding pile through the wire-wound resistor (23) to complete the safe discharge.

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