Silicon controlled rectifier detection test bed
Through the Thyristor detection test bench integrating incandescent lamp holder, trigger, potentiometer and oscilloscope, the problem of large and low efficiency of manual detection error is solved, and efficient and accurate Thyristor detection is achieved.
Patent Information
- Application Number
- CN202422421122.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-10-08
AI Technical Summary
In the prior art, the detection of thyristors relies on manual testing, and there are problems of large errors and low efficiency.
A thyristor detection test bench was designed, integrating an incandescent lamp holder, trigger, potentiometer and oscilloscope. The conduction angle of the thyristor is changed through the potentiometer to adjust the triggering time. The oscilloscope monitors the waveform in real time, and combines the fixture and driver to stably clamp the thyristor to achieve automatic detection.
It improves the accuracy and efficiency of thyristor detection, reduces erroneous operations, and ensures the accuracy and speed of detection results.
Smart Images
Figure CN223296090U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of test circuits, in particular to a thyristor detection test bench. Background Art
[0002] Thyristor, abbreviated as SCR, is a high-power electrical component, also known as thyristor. It has the advantages of small size, high efficiency and long life. In automatic control systems, it can be used as a high-power driver to control high-power equipment with small-power controls. It has been widely used in AC and DC motor speed control systems, power regulation systems and servo systems. Thyristors are divided into unidirectional thyristors and bidirectional thyristors. Bidirectional thyristors are also called three-terminal bidirectional thyristors. Bidirectional thyristors are structurally equivalent to two unidirectional thyristors connected in reverse. This type of thyristor has a bidirectional conduction function, and its on-off state is determined by the control electrode G. Applying a positive pulse to the control electrode G can make it conduct in the forward direction. The advantage of this device is that the control circuit is simple and there is no reverse voltage withstand problem. Therefore, it is particularly suitable for use as an AC contactless switch.
[0003] In order to ensure the quality and performance of thyristors, strict testing is required during the production process and before installation and use to ensure that each thyristor meets the requirements of design specifications and technical standards. Traditional methods usually rely on experienced technical personnel to manually test using basic tools such as multimeters and oscilloscopes. Manual testing is not only time-consuming, but also prone to problems such as misoperation or reading errors, which affect the accuracy of the test results. In addition, the overall detection efficiency is low, which requires the use of a specially designed thyristor detection test bench to carry out various necessary tests. Therefore, we have designed a thyristor detection test bench to achieve the effect of detecting the working quality of thyristors. Utility Model Content
[0004] In order to overcome the shortcomings of the existing manual testing of thyristor quality, which is prone to detection errors and low detection efficiency, a thyristor detection test bench is provided.
[0005] The technical implementation scheme of the utility model is: a thyristor detection test bench, including a chassis, an incandescent lamp holder, a trigger, a potentiometer, an oscilloscope and a fixture, the chassis is the installation carrier of the test bench and is externally connected to an AC power supply, the incandescent lamp holder is installed on the left side of the top surface of the chassis, the incandescent lamp holder is connected to the AC power supply externally through the chassis and serves as the load of the thyristor in the circuit, the trigger is also installed on the left side of the top surface of the chassis, the incandescent lamp holder and the trigger are electrically connected, the trigger is connected to the AC power supply externally through the chassis and is used to generate a trigger signal for the thyristor, the machine A potentiometer is installed on the right side of the top surface of the box. The potentiometer changes the conduction angle of the thyristor by adjusting the trigger time. The trigger is electrically connected to the potentiometer. An oscilloscope is built into the front side of the chassis. The positive and negative wiring of the oscilloscope is electrically connected to the two ends of the incandescent lamp holder. The oscilloscope is used to monitor whether the conduction waveform of the thyristor is normal. A clamp is also provided on the right side of the top surface of the chassis. The clamp is used to clamp and connect the thyristor. The clamp is electrically connected to the incandescent lamp holder through a lead, and the clamp is also electrically connected to the trigger through a lead.
[0006] In a preferred embodiment of the present invention, the clamp includes a fixed plate, a positioning member, a first metal pressure plate, a movable plate, a second metal pressure plate, a guide rod and a driving member. A fixed plate is provided on the top of the chassis, a positioning member of a center limit thyristor is provided on the fixed plate, a first metal pressure plate is installed in the middle of the fixed plate, a center positioning pin is provided on the first metal pressure plate, the first metal pressure plate is electrically connected to the trigger through a lead, guide rods are fixed at the four corners of the fixed plate, a movable plate is slidably installed on the fixed plate through the guide rod, a second metal pressure plate is installed in the middle of the movable plate, the first metal pressure plate and the second metal pressure plate are aligned and adapted, the second metal pressure plate is electrically connected to the incandescent lamp holder through a lead, and a driving member is provided in the chassis, the driving member is used to drive the movable plate to drive the second metal pressure plate to move up and down.
[0007] In a preferred embodiment of the present invention, a limiting ring is fixedly sleeved on each of the guide rods, and the limiting ring is used to limit the lifting height of the movable plate to prevent the driving member from over-driving the movable plate and causing it to slide out of the guide rod.
[0008] In a preferred embodiment of the present invention, the driving member includes an electric push rod, a buffer member and a connecting plate. The electric push rod is installed inside the chassis. The push rod of the electric push rod passes through the top surface of the chassis and is then installed with a connecting plate. A buffer member is provided between the push rod and the connecting plate of the electric push rod. The buffer member is used to buffer the pressure of the electric push rod driving the connecting plate. The connecting plate and the movable plate are fixedly connected.
[0009] In a preferred embodiment of the present invention, the buffer member includes a first spring and a sliding plate, the sliding plate is installed at the push rod end of the electric push rod, the sliding plate is slidably connected to the connecting plate through the connecting rod thereon, and a first spring is provided between the sliding plate and the connecting plate.
[0010] In a preferred embodiment of the present invention, the positioning member includes a mounting plate, a limiting rod and a second spring, and a plurality of mounting plates are fixedly connected to the fixed plate. The mounting plates are circumferentially distributed outside the first metal pressure plate, and the mounting plates are all slidably installed with limiting rods. The clamping end of the limiting rod is an oblique rod, and a second spring is provided between the mounting plate and the limiting rod. The clamping extension centers of the plurality of limiting rods are aligned with the center positioning pin of the second metal pressure plate.
[0011] Compared with the existing technology, the utility model has the following advantages: 1. The utility model integrates an incandescent lamp holder, a trigger, a potentiometer and an oscilloscope on the chassis. The trigger moment is adjusted by the potentiometer to change the conduction angle of the thyristor. The working status of the thyristor is displayed in real time by the oscilloscope, which makes it easy to observe whether the waveform is normal, helps to quickly identify potential problems, and improves the detection efficiency and accuracy of the thyristor.
[0012] 2. The utility model can stably clamp the thyristor through the cooperation of the first metal pressure plate and the second metal pressure plate to ensure that it is correctly connected to the detection circuit. At the same time, it is designed with a driving part, which realizes the soft clamping of the thyristor through the electric push rod combined with the buffer part to avoid damage due to excessive pressure.
[0013] 3. The present invention can also utilize a positioning mechanism consisting of an oblique rod limit rod and a second spring to ensure that the thyristor is accurately placed on the first metal pressure plate, and add a limit ring to limit the maximum lifting height of the movable plate to prevent component damage caused by operational errors. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.
[0015] Figure 2 It is a three-dimensional structural diagram of the incandescent lamp holder, trigger and other parts of the utility model.
[0016] Figure 3 It is a three-dimensional structural diagram of the electric push rod, connecting plate and other components of the utility model.
[0017] Figure 4 It is a three-dimensional structural diagram of components such as the thyristor and the limit rod of the utility model.
[0018] The components in the accompanying drawings are marked as follows: 1. Chassis, 2. Incandescent lamp holder, 3. Trigger, 4. Potentiometer, 5. Fixed plate, 6. First metal pressure plate, 7. Thyristor, 8. Movable plate, 9. Second metal pressure plate, 10. Guide rod, 11. Limiting ring, 12. Oscilloscope, 13. Electric push rod, 14. Connecting plate, 15. First spring, 16. Sliding plate, 17. Mounting plate, 18. Limiting rod, 19. Second spring. DETAILED DESCRIPTION
[0019] First of all, it should be noted that in the various embodiments described, identical components are provided with identical reference numerals or identical component names, wherein the disclosure contained throughout the entire description can be transferred to the same components having the same reference numerals or identical component names. Positional designations selected in the description, such as top, bottom, lateral, etc., also refer to the directly described and illustrated figures and are transferred to the new position in the event of a change in position.
[0020] Example: Thyristor test bench, such as Figure 1 and Figure 2 As shown, it includes a chassis 1, an incandescent lamp holder 2, a trigger 3, a potentiometer 4, an oscilloscope 12 and a fixture. The chassis 1 is the installation carrier of the test bench and is externally connected to an AC power supply. The incandescent lamp holder 2 is installed on the left side of the top surface of the chassis 1. The incandescent lamp holder 2 is connected to an external AC power supply through the chassis 1 and serves as a load for the thyristor 7 in the circuit. The trigger 3 is also installed on the left side of the top surface of the chassis 1. The incandescent lamp holder 2 and the trigger 3 are electrically connected. The trigger 3 is connected to an external AC power supply through the chassis 1 and is used to generate a trigger signal for the thyristor 7. The electric The potentiometer 4 changes the conduction angle of the thyristor 7 by adjusting the trigger time. The trigger 3 is electrically connected to the potentiometer 4. An oscilloscope 12 is built into the front side of the chassis 1. The positive and negative wiring of the oscilloscope 12 are electrically connected to the two ends of the incandescent lamp holder 2. The oscilloscope 12 is used to monitor whether the conduction waveform of the thyristor 7 is normal. A clamp is also provided on the right part of the top surface of the chassis 1. The clamp is used to clamp and connect the thyristor 7. The clamp is electrically connected to the incandescent lamp holder 2 through a lead, and the clamp is also electrically connected to the trigger 3 through a lead.
[0021] like Figure 1-Figure 3As shown, the fixture includes a fixed plate 5, a positioning member, a first metal pressure plate 6, a movable plate 8, a second metal pressure plate 9, a guide rod 10 and a driving member. A fixed plate 5 is provided on the top of the chassis 1. A positioning member of a center-limited thyristor 7 is provided on the fixed plate 5. A first metal pressure plate 6 is installed in the middle of the fixed plate 5. A center positioning pin is provided on the first metal pressure plate 6. The first metal pressure plate 6 is electrically connected to the trigger 3 through a lead. The four corners of the fixed plate 5 are fixed with a guide rod 10. The fixed plate 5 is slidably installed with a movable plate 8 through the guide rod 10. A second metal pressure plate 6 is installed in the middle of the movable plate 8. The first metal pressure plate 6 and the second metal pressure plate 9 are aligned and adapted, and the second metal pressure plate 9 is electrically connected to the incandescent lamp holder 2 through a lead. A driving member is provided in the chassis 1, and the driving member is used to drive the movable plate 8 to drive the second metal pressure plate 9 to move up and down, so that the second metal pressure plate 9 can clamp the thyristor 7 placed on the first metal pressure plate 6, so that the thyristor 7 is connected to the detection circuit; the guide rods 10 are fixedly sleeved with a limit ring 11, and the limit ring 11 is used to limit the lifting height of the movable plate 8 to prevent the driving member from over-driving the movable plate 8 and sliding out of the guide rod 10.
[0022] like Figure 1 and Figure 3 As shown, the driving member includes an electric push rod 13, a buffer and a connecting plate 14. The electric push rod 13 is installed inside the chassis 1, and the push rod of the electric push rod 13 is installed with a connecting plate 14 after passing through the top surface of the chassis 1. A buffer is provided between the push rod of the electric push rod 13 and the connecting plate 14. The buffer is used to buffer the pressure of the electric push rod 13 driving the connecting plate 14. The connecting plate 14 and the movable plate 8 are fixedly connected. The electric push rod 13 drives the connecting plate 14 so that the connecting plate 14 drives the movable plate 8 and the second metal pressure plate 9 to move up and down, so that the first metal pressure plate 6 and the second metal pressure plate 9 clamp the thyristor 7; the buffer includes a first spring 15 and a sliding plate 16. The push rod end of the electric push rod 13 is installed with a sliding plate 16. The sliding plate 16 is slidably connected to the connecting plate 14 through the connecting rod thereon, and a first spring 15 is provided between the sliding plate 16 and the connecting plate 14.
[0023] like Figure 2 and Figure 4 As shown, the positioning member includes a mounting plate 17, a limiting rod 18 and a second spring 19. A plurality of mounting plates 17 are fixed to the fixed plate 5. The mounting plates 17 are circumferentially distributed outside the first metal pressure plate 6. The mounting plates 17 are all slidably installed with limiting rods 18. The clamping end of the limiting rod 18 is an oblique rod. A second spring 19 is provided between the mounting plate 17 and the limiting rod 18. The clamping extension centers of the plurality of limiting rods 18 are aligned with the center positioning pin of the second metal pressure plate 9.
[0024] When using this test bench to test the thyristor 7, first place the thyristor 7 downward onto the first metal pressure plate 6. At this time, the thyristor 7 pressed down will squeeze the limit rod 18. The multiple limit rods 18 squeezed will overcome the elastic force of the second spring 19 and open in the direction away from each other under the guidance of the mounting plate 17. The opened limit rods 18 will stably clamp the thyristor 7 placed on the first metal pressure plate 6 under the action of the second spring 19. Since the clamping extension center of the limit rod 18 is located at the first metal pressure plate 6, the limit rods 18 can be clamped stably. The center point of the thyristor 7 is set, so that the center hole of the thyristor 7 can be stably limited at the center of the first metal pressure plate 6, and the center hole of the thyristor 7 is aligned upward with the center point of the second metal pressure plate 9. At the same time, by activating the electric push rod 13, the push rod of the electric push rod 13 drives the sliding plate 16 downward, so that the sliding plate 16 acts on the connecting plate 14 through the first spring 15, so that the connecting plate 14 drives the movable plate 8 and the second metal pressure plate 9 to move downward synchronously, and under the guidance of the guide rod 10, the second metal pressure plate 9 can be accurately pressed down and docked onto the thyristor 7, and The center hole of the thyristor 7 is aligned with the center positioning pin of the first metal pressure plate 6 and the second metal pressure plate 9 respectively. When the first metal pressure plate 6 and the second metal pressure plate 9 press the thyristor 7, the push rod of the electric push rod 13 will continue to act on the connecting plate 14 through the first spring 15, so that the connecting plate 14 further clamps the thyristor 7 through the movable plate 8 and the second metal pressure plate 9. Then, the contact lead of the thyristor 7 is connected to the corresponding connection terminal. After checking that the circuit wiring is correct, power is applied to the chassis 1. The inspection personnel adjust the Potentiometer 4 is used to change the conduction angle of thyristor 7, and at the same time, the change in the brightness of the light of the incandescent lamp holder 2 is observed. When the resistance of potentiometer 4 is reduced, the incandescent lamp should dim, and when the resistance of potentiometer 4 is increased, the incandescent lamp should brighten, indicating that the thyristor 7 is working normally. When the brightness of the incandescent lamp does not change when the resistance of potentiometer 4 is increased or decreased, it indicates that the thyristor 7 is working abnormally. At the same time, the adjustment process is monitored by oscilloscope 12 to check whether the conduction waveform of thyristor 7 is normal, thereby improving the detection accuracy and efficiency of thyristor 7.
[0025] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to be included in the scope of protection of the present invention.
Claims
1. A thyristor detection test bench, comprising a chassis (1), wherein the chassis (1) is a mounting carrier of the test bench and is connected to an external AC power supply, and is characterized in that: The invention also includes an incandescent lamp holder (2), a trigger (3), a potentiometer (4), an oscilloscope (12) and a clamp. The incandescent lamp holder (2) is installed on the left side of the top surface of the chassis (1). The incandescent lamp holder (2) is connected to an external AC power supply through the chassis (1). The left side of the top surface of the chassis (1) is also installed with a trigger (3). The incandescent lamp holder (2) and the trigger (3) are electrically connected. The trigger (3) is connected to an external AC power supply through the chassis (1). The right side of the top surface of the chassis (1) is installed with a potentiometer (4). The trigger (3) and the potentiometer (4) are electrically connected. The front side of the chassis (1) is equipped with an oscilloscope (12). The positive and negative wiring of the oscilloscope (12) are electrically connected to the two ends of the incandescent lamp holder (2). The right side of the top surface of the chassis (1) is also provided with a clamp. The clamp is used to clamp the thyristor (7).
2. The thyristor detection test bench according to claim 1, characterized in that: The clamp comprises a fixed plate (5), a positioning member, a first metal pressure plate (6), a movable plate (8), a second metal pressure plate (9), a guide rod (10) and a driving member. A fixed plate (5) is provided on the top of the chassis (1). A positioning member of a center-limiting thyristor (7) is provided on the fixed plate (5). A first metal pressure plate (6) is installed in the middle of the fixed plate (5). A center positioning pin is provided on the first metal pressure plate (6). The first metal pressure plate (6) and the trigger (3) are electrically connected. Guide rods (10) are fixedly connected to the four corners of the fixed plate (5), and a movable plate (8) is slidably mounted on the fixed plate (5) through the guide rods (10). A second metal pressure plate (9) is mounted in the middle of the movable plate (8), and the first metal pressure plate (6) and the second metal pressure plate (9) are adapted to each other. The second metal pressure plate (9) and the incandescent lamp holder (2) are electrically connected. A driving member is provided in the chassis (1), and the driving member is used to drive the movable plate (8) to drive the second metal pressure plate (9) to move up and down.
3. The thyristor detection test bench according to claim 2, characterized in that: A limiting ring (11) is fixedly sleeved on each of the guide rods (10), and the limiting ring (11) is used to limit the lifting height of the movable plate (8).
4. The thyristor detection test bench according to claim 3 is characterized in that: The driving member includes an electric push rod (13), a buffer member and a connecting plate (14); the electric push rod (13) is installed inside the chassis (1); the push rod of the electric push rod (13) passes through the top surface of the chassis (1) and is then installed with the connecting plate (14); a buffer member is provided between the push rod of the electric push rod (13) and the connecting plate (14); the buffer member is used to buffer the pressure of the electric push rod (13) driving the connecting plate (14); the connecting plate (14) and the movable plate (8) are fixedly connected.
5. The thyristor detection test bench according to claim 4 is characterized in that: The buffer member includes a first spring (15) and a sliding plate (16). The sliding plate (16) is installed at the push rod end of the electric push rod (13). The sliding plate (16) is slidably connected to the connecting plate (14) through a connecting rod thereon. A first spring (15) is provided between the sliding plate (16) and the connecting plate (14).
6. The thyristor detection test bench according to claim 5, characterized in that: The positioning member includes a mounting plate (17), a limiting rod (18) and a second spring (19). A plurality of mounting plates (17) are fixedly connected to the fixed plate (5). The mounting plates (17) are circumferentially distributed outside the first metal pressure plate (6). The mounting plates (17) are all slidably mounted with the limiting rod (18). The clamping end of the limiting rod (18) is an oblique rod. A second spring (19) is provided between the mounting plate (17) and the limiting rod (18).