A pulse power special ceramic capacitor test device

Abstract

The present invention provides a pulse power special ceramic capacitor test device, comprising a base, a feeding mechanism arranged on the base, a carrier, a carrier driving mechanism, a testing mechanism, a gear mechanism, a circuit module and a discharging mechanism, wherein the feeding mechanism is used to transmit ceramic capacitors, the carrier comprises a vertically rotating disc, and a plurality of isolation structure bins arranged on the disc at circumferential intervals, the carrier driving mechanism is used to drive the carrier to rotate, and when the carrier rotates, the gear mechanism drives the testing mechanism to be pressed and connected with the ceramic capacitor to be tested, and the discharging mechanism discharges the tested ceramic capacitor from the isolation structure bin, and the circuit module comprises a high-voltage excitation power supply, a pulse module connected to the output end of the high-voltage excitation power supply, a trigger tube connected to the output end of the pulse module at one end, a high-voltage energy storage power supply, and a high-power resistor connected to the output end of the high-voltage energy storage power supply at one end. The present invention does not require manual supervision, improves efficiency, reduces error rate, and reduces cost.

Description

Technical Field

[0001] The invention belongs to the field of capacitor testing, and in particular relates to a pulse power special ceramic capacitor testing device. Background Art

[0002] Pulse power special ceramic capacitors are usually used in special equipment, aerospace and other fields. They can discharge at a very high voltage at a specified frequency, release a very high power current, and trigger the operation of corresponding electronic equipment (such as Hall thrusters). In order to ensure the quality stability, reliability and consistency of pulse power special ceramic capacitors, they need to be tested for the release of the limit potential energy before leaving the factory, that is, the ceramic capacitors need to be charged and discharged multiple times. In the prior art, the devices for this test of ceramic capacitors require manual cooperation for loading and unloading, which makes the test efficiency low and the error rate high. Summary of the invention

[0003] The purpose of the present invention is to provide a pulse power special ceramic capacitor test device, which does not require manual supervision, improves efficiency, reduces error rate and reduces cost.

[0004] The present invention is achieved through the following technical solutions:

[0005] A pulse power special ceramic capacitor test device, comprising a base, a feeding mechanism arranged on the base, a carrier, a carrier driving mechanism, a testing mechanism, a gear mechanism, a circuit module and a discharge mechanism, wherein the feeding mechanism is used to transmit ceramic capacitors, the carrier comprises a vertically rotating disc, and a plurality of isolation structure bins arranged on the disc at circumferential intervals for placing ceramic capacitors, the carrier driving mechanism is used to drive the carrier to rotate so that an idle isolation structure bin is connected to the output end of the feeding mechanism, the isolation structure bin for placing the ceramic capacitor to be tested is connected to the testing mechanism, and the isolation structure bin for placing the tested ceramic capacitor is connected to the discharge mechanism, and the gear mechanism is arranged between the testing mechanism and the carrier. When the carrier rotates, the gear mechanism drives the test mechanism to press and connect the positive and negative electrodes of the ceramic capacitor to be tested, and the discharge mechanism discharges the tested ceramic capacitor from the isolation structure bin. The circuit module includes a high-voltage excitation power supply, a high-voltage energy storage power supply and a control logic circuit. The control logic circuit includes a pulse module connected to the output end of the high-voltage excitation power supply, a trigger tube connected to the output end of the pulse module at one end, and a high-power resistor connected to the output end of the high-voltage energy storage power supply at one end. When the test mechanism is connected to the positive and negative ends of the ceramic capacitor, the ceramic capacitor is connected to the trigger tube in parallel, and one end of the ceramic capacitor is connected to one end of the high-power resistor, and the other end of the high-power resistor is connected to the output end of the high-voltage energy storage power supply. Through the mutual cooperation of the feeding mechanism, the carrier, the carrier driving mechanism, the test mechanism, the gear mechanism, the circuit module and the discharge mechanism, the test can be completed without manual supervision, thereby improving the test efficiency, reducing the error rate, and reducing the labor cost. The setting of the disc and the isolation structure bin can avoid the damage of the ceramic capacitor to the arc caused by the high power of DC during the test.

[0006] Furthermore, the carrier driving mechanism includes a carrier driving motor arranged on a base, an eccentric wheel arranged at an output end of the carrier driving motor, a driving plate connected to the eccentric wheel through a connecting rod and extending to the front of the disc, a pushing plate arranged at the upper part of the rear end of the driving plate and close to the connecting rod, a pushing rod arranged at the lower part of the rear end of the driving plate and away from the connecting rod, and a force-bearing block arranged at a circumferential interval at the front end of the disc and extending radially along the disc. After the test of the ceramic dielectric capacitor to be tested is completed, the carrier driving motor is activated and drives the eccentric wheel to rotate, and then drives the driving plate to move horizontally in a direction away from the center of the disc through the connecting rod. The push rod moves with the driving plate and applies an upward thrust to the nearest force block above it during the movement, thereby pushing the disc to rotate clockwise. The carrier drive motor continues to move so that the driving plate moves horizontally toward the center of the disc. During this process, the push plate moves with the driving plate and applies an upward thrust to the nearest force block above it during the movement, thereby pushing the disc to rotate clockwise until an idle isolation structure bin of the disc is connected to the output end of the discharge mechanism, and the carrier drive motor stops moving. At this time, the next isolation structure bin for placing the ceramic capacitor to be tested is connected to the test mechanism. The carrier drive motor is used to drive the carrier to rotate, thereby realizing the coordination with the discharge mechanism and the test mechanism, and the structure is reasonable.

[0007] Furthermore, the test device further includes a guide mechanism, which includes a fixed seat arranged on the base, a guide plate horizontally arranged on the fixed seat and extending to the front of the driving plate, and a slide rail mechanism horizontally arranged between the driving plate and the guide plate. The guide mechanism ensures the motion trajectory of the driving plate and ensures the accuracy of the vehicle driving mechanism in driving the vehicle.

[0008] Further, the test device also includes a positioning mechanism, which includes a positioning motor arranged at the front end of the guide plate, a first vertical rod rotatably arranged at the output end of the positioning motor, an inclined rod arranged at the upper end of the first vertical rod and tilted backward, a second vertical rod arranged at the upper end of the inclined rod, a positioning pin horizontally arranged on the second vertical rod and extending backward, a third vertical rod arranged at the upper end of the guide plate, a horizontal rod rotatably connected to the third vertical rod and the first vertical rod at both ends, and a plurality of positioning holes arranged on the disc at circumferential intervals and connected to each isolation structure bin. During the process of the disc rotating to the next isolation structure bin where the ceramic dielectric capacitor to be tested is placed and connected to the test mechanism, the positioning motor drives the positioning pin to move horizontally to approach the disc, and when the disc stops rotating, the positioning pin is inserted into a positioning hole. After the test is completed, the positioning motor drives the positioning pin to move out of the positioning hole. The positioning mechanism positions the disc for rotation, ensures that the disc rotates in place, and fixes the disc after the disc rotates in place, so as to facilitate the action of other mechanisms. The positioning hole can also be inserted into the positive elastic test pin, the qualified push rod or the unqualified push rod, and the design is reasonable.

[0009] Furthermore, the test mechanism includes a positive electrode box and a negative electrode box arranged on a base in an inclined and rotatable manner, a fluoride liquid arranged in the positive electrode box and the negative electrode box, four positive electrode elastic test needles extending from the four sides of the positive electrode box, and four negative electrode elastic test needles extending from the four sides of the negative electrode box. When the disc rotates to connect the isolation structure compartment of the ceramic capacitor to be tested with the test mechanism, one of the positive electrode elastic test needles is inserted into the corresponding positioning hole to contact and connect with the positive electrode of the ceramic capacitor, and one of the negative electrode elastic test needles is contacted and connected with the negative electrode of the ceramic capacitor through the opening of the isolation structure compartment. The positive electrode elastic test needle of the test mechanism contacts the ceramic capacitor using the positioning hole, and the negative electrode elastic test needle contacts the ceramic capacitor through the opening of the isolation structure compartment, which cooperates with other structures, has a reasonable structure, and the fluoride liquid has extremely high insulation performance, can withstand extremely high voltage without being broken down, thereby reducing the generation of arcs.

[0010] Furthermore, the gear mechanism includes an outer gear arranged on the outer periphery of the disc, a gear bar rotating on a base, and two transmission gears rotating on the positive box and the negative box, respectively, the outer gear meshes with the middle of the gear bar, the two transmission gears mesh with the two ends of the gear bar, the gear bar rotates with the rotation of the disc, and the two transmission gears rotate with the rotation of the gear bar, so that the positive elastic test needle and the negative elastic test needle press the positive and negative electrodes of the ceramic capacitor. The gear mechanism realizes the mutual cooperation between the disc and the test mechanism, ensures the reliable connection between the positive elastic test needle and the negative elastic test needle and the ceramic capacitor, and thus ensures the accuracy and reliability of the test.

[0011] Furthermore, the discharging mechanism includes a forward and reverse motor arranged on the base and located in front of the disc, a qualified push rod and an unqualified push rod respectively connected to the two output ends of the forward and reverse motors, and a qualified material box and an unqualified material box arranged on the base and located behind the base. The qualified push rod and the unqualified push rod can both be inserted into the positioning hole to push the corresponding ceramic dielectric capacitor into the qualified material box or the unqualified material box. The discharging mechanism can automatically classify qualified products and unqualified products without manual participation in the classification.

[0012] Furthermore, the disc is made of polytetrafluoroethylene, and the positive electrode elastic test needle and the negative electrode elastic test needle are made of K gold material.

[0013] Furthermore, the circuit module also includes an adjustable inductor, an adjustable resistor, a current sensing coil and a high-voltage power meter. The pulse module includes a high-voltage thyristor whose anode is connected to the positive electrode of the high-voltage excitation power supply, a pulse generator connected to the control end of the high-voltage thyristor, a current-limiting resistor connected to the cathode of the high-voltage thyristor, and an excitation capacitor connected between the current-limiting resistor and the negative electrode of the high-voltage excitation power supply. The adjustable inductor is connected between the trigger tube and the current sensing coil, the current sensing coil is connected in series with the ceramic capacitor, the adjustable resistor is connected between the trigger tube and the ceramic capacitor, the high-voltage power meter is connected between the positive and negative electrodes of the high-voltage energy storage power supply, the high-voltage excitation power supply outputs an excitation voltage, and the high-voltage energy storage power supply outputs a high-voltage DC voltage. The power module can realize the limit potential energy collection and release test of the ceramic capacitor according to the specified frequency. The circuit is simple and reasonable, and the test results are accurate and reliable.

[0014] Furthermore, the carrier also includes a support rod that is arranged on the base and extends forward transversely, and the disc is rotatably arranged on the support rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described in detail below with reference to the accompanying drawings.

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 Another structural schematic diagram of the present invention.

[0018] Figure 3 It is another structural schematic diagram of the present invention (showing a box of qualified products and a box of unqualified products).

[0019] Figure 4 It is a schematic diagram of the structure of the carrier driving mechanism, guiding mechanism and positioning mechanism of the present invention.

[0020] Figure 5 It is another structural schematic diagram of the carrier driving mechanism, guiding mechanism and positioning mechanism of the present invention.

[0021] Figure 6 It is a schematic diagram of the structure of the carrier, the testing mechanism and the gear mechanism of the present invention.

[0022] Figure 7 Another structural schematic diagram of the carrier, the testing mechanism and the gear mechanism of the present invention.

[0023] Figure 8 for Figure 1 Enlarged view of part A.

[0024] Fig. 9 4 is a circuit schematic diagram of the circuit module of the present invention.

[0025] Among them, 1. base; 11. first horizontal substrate; 12. second horizontal substrate; 13. rectangular box; 2. feeding mechanism; 3. carrier; 31. disc; 32. isolation structure bin; 33. support rod; 4. carrier drive mechanism; 41. carrier drive motor; 42. eccentric wheel; 43. connecting rod; 44. drive plate; 45. push plate; 46. push rod; 47. force block; 5. test mechanism; 51. positive box; 52. negative box; 53. positive elastic test needle; 54. negative elastic test needle; 55. horizontal plate; 56. tilting plate; 6. gear mechanism; 61. external gear; 62. gear bar; 63. transmission gear; 7. discharge mechanism; 71. forward and reverse motor; 72. qualified connecting rod; 73. unqualified connecting rod; 7 4. Qualified push rod; 75. Unqualified push rod; 76. Qualified material box; 77. Unqualified material box; 8. Guide mechanism; 81. Fixed seat; 82. Guide plate; 83. Slide rail mechanism; 9. Positioning mechanism; 91. Positioning motor; 92. First vertical rod; 93. Tilt rod; 94. Second vertical rod; 95. Positioning pin; 96. Third vertical rod; 97. Horizontal rod; 98. Positioning hole; 101. High-voltage excitation power supply; 102. High-voltage energy storage power supply; 103. Control logic circuit; VE, trigger tube; R1, current limiting resistor; V1, high-voltage thyristor; C1, excitation capacitor; L1, adjustable inductor; R2, adjustable resistor; TA, current sensing coil; R3, high-power resistor; V, high-voltage power meter; 104, ceramic capacitor. DETAILED DESCRIPTION

[0026] like Figures 1 to 9 As shown, the pulse power special ceramic capacitor 104 test device includes a base 1, a feeding mechanism 2 arranged on the base 1, a carrier 3, a carrier driving mechanism 4, a guiding mechanism 8, a positioning mechanism 9, a testing mechanism 5, a gear mechanism 6, a circuit module and a discharge mechanism 7. The base 1 includes a first horizontal substrate 11, a second horizontal substrate 12 arranged on one side of the horizontal substrate and extending upward, and a rectangular box 13 arranged at the rear end of the first horizontal substrate 11 and extending upward, wherein the rectangular box 13 is hollow and has an opening at the rear end.

[0027] The feeding mechanism 2 is used to transmit ceramic capacitors 104 (i.e., pulse power special ceramic capacitors). Multiple ceramic capacitors 104 to be tested are placed on the feeding mechanism 2. The feeding mechanism 2 controls the ceramic capacitors 104 to be tested to enter the carrier 3 in sequence. In this embodiment, the feeding mechanism 2 is implemented using an existing feeding vibration disk mechanism.

[0028] The carrier 3 includes a support rod 33 that is arranged on the wall of the rectangular box 13 and extends horizontally and forward, a disc 31 that is arranged vertically and rotatably on the support rod 33, and a plurality of isolation structure compartments 32 that are arranged circumferentially at intervals on the disc 31 to place the ceramic capacitor 104. The isolation structure compartment 32 is opened at the rear end of the disc 31 and does not penetrate the disc 31, so as to realize the positive and negative pole space isolation design of the ceramic capacitor 104. In this embodiment, the disc 31 is made of polytetrafluoroethylene, and the size of the ceramic capacitor 104 is 10mm wide*4mm high*12mm long, and the size of the isolation structure compartment 32 is 12mm wide*6mm high*13mm deep. In this way, the space for the capacitor can be met and there is a reasonable isolation space. The dielectric constant of the pulse power special ceramic capacitor 104 during testing can be controlled below 2.0, which can effectively prevent the layout leakage current generated when the ultra-high voltage is applied during the test, thereby causing the pulse power special ceramic capacitor 104 to short-circuit and burst.

[0029] The carrier driving mechanism 4 is used to drive the carrier 3 to rotate so that an idle isolation structure compartment 32 is connected to the output end of the feeding mechanism 2, the isolation structure compartment 32 for placing the ceramic dielectric capacitor 104 to be tested is connected to the testing mechanism 5, and at the same time, the isolation structure compartment 32 for placing the tested ceramic dielectric capacitor 104 is connected to the discharge mechanism 7. In this embodiment, the carrier driving mechanism 4 includes a carrier driving motor 41 arranged on the base 1, an eccentric wheel 42 arranged at the output end of the carrier driving motor 41, a driving plate 44 connected to the eccentric wheel 42 through a connecting rod 43 and extending to the front of the disc 31, a pushing plate 45 arranged at the upper part of the rear end of the driving plate 44 and close to the connecting rod 43, a pushing rod 46 arranged at the lower part of the rear end of the driving plate 44 and away from the connecting rod 43, and a force block 47 arranged at a circumferential interval at the front end of the disc 31 and extending radially along the disc 31. After the test of the ceramic capacitor 104 to be tested is completed, the carrier driving motor 41 is activated and drives the eccentric wheel 42 to rotate, and then drives the driving plate 44 to move horizontally in a direction away from the center of the disc 31 through the connecting rod 43, and the pushing plate 45 gradually separates from the current force block 47, and the pushing rod 46 moves with the driving plate 44 and applies an upward thrust to the force block 47 above it, which is closest to it during the movement. Thereby, the disc 31 is pushed to rotate clockwise. During the clockwise rotation of the disc 31, the adjacent force block 47 below the previous force block 47 that was subjected to the force of the pushing plate 45 is driven to move upward, and the carrier driving motor 41 continues to operate, so that the driving plate 44 moves horizontally again toward the center of the disc 31. At this time, the adjacent force block 47 below moves to a position where the force can be applied by the pushing plate 45, and the pushing plate 45 moves with the driving plate 44 and applies an upward thrust to the force block 47 during the operation, thereby pushing the disc 31 to rotate clockwise until an idle isolation structure bin 32 of the disc 31 is connected to the output end of the discharge mechanism 7, at which time the carrier driving motor 41 stops operating, and the next isolation structure bin 32 for placing the ceramic dielectric capacitor 104 to be tested is connected to the testing mechanism 5, and the discharge mechanism 7 inputs the ceramic dielectric capacitor 104 to be tested into the idle isolation structure bin 32, and the testing mechanism 5 tests the ceramic dielectric capacitor 104 to be tested. The upper side of one end of the push plate 45 close to the center of the disk 31 has an inclined surface to exert sufficient force on the force-bearing block 47 .

[0030] The guide mechanism 8 is used to guide the driving plate 44 when it moves, and specifically includes a fixed seat 81 set on the base 1, a guide plate 82 horizontally set on the fixed seat 81 and extending to the front of the driving plate 44, and a slide rail mechanism 83 horizontally set between the driving plate 44 and the guide plate 82.

[0031] The positioning mechanism 9 includes a positioning motor 91 arranged at the front end of the guide plate 82, a first vertical rod 92 rotatably arranged at the output end of the positioning motor 91, an inclined rod 93 arranged at the upper end of the first vertical rod 92 and inclined backward, a second vertical rod 94 arranged at the upper end of the inclined rod 93, a positioning pin 95 horizontally arranged on the second vertical rod 94 and extending backward, a third vertical rod 96 arranged at the upper end of the guide plate 82, a horizontal rod 97 rotatably connected to the third vertical rod 96 and the first vertical rod 92 at both ends, and positioning holes 98 arranged on the disc 31 at circumferential intervals. During the process of the disc 31 rotating to the next isolation structure compartment 32 for placing the ceramic dielectric capacitor 104 to be tested and connecting it to the testing mechanism 5, the positioning motor 91 is actuated to drive the positioning pin 95 to move horizontally to approach the disc 31. When the disc 31 stops rotating, the positioning pin 95 is inserted into a corresponding positioning hole 98. After the test is completed, the positioning motor 91 is actuated to drive the positioning pin 95 to move horizontally to move away from the disc 31, and then move out of the positioning hole 98.

[0032] The testing mechanism 5 includes a horizontal plate 55 disposed on the first horizontal substrate 11, two inclined plates 56 disposed at both ends of the horizontal plate 55, a positive electrode box 51 and a negative electrode box 52 respectively rotatably disposed on the two inclined plates 56, fluorine liquid disposed in the positive electrode box 51 and the negative electrode box 52, four positive electrode elastic test needles 53 extending from four sides of the positive electrode box 51, and four negative electrode elastic test needles 54 extending from four sides of the negative electrode box 52. The positive electrode elastic test needle 53 and the negative electrode elastic test needle 54 are both provided with a 0.3MM hollow hole to allow the positive electrode box 51 to be tested. During the test, the fluorinated liquid is squeezed out, and the disc 31 rotates to connect the isolation structure compartment 32 of the ceramic dielectric capacitor 104 to be tested with the testing mechanism 5. One of the positive elastic test needles 53 is inserted into the corresponding positioning hole 98 to contact and connect with the positive electrode of the ceramic dielectric capacitor 104, and one of the negative elastic test needles 54 is contacted and connected with the negative electrode of the ceramic dielectric capacitor 104 through the opening of the isolation structure compartment 32. When the next ceramic dielectric capacitor 104 to be tested arrives, the other positive elastic test needle 53 and the other negative elastic test needle 54 press and contact the ceramic dielectric capacitor 104.

[0033] In this embodiment, the positive elastic test needle 53 and the negative elastic test needle 54 are both made of K gold material, which adopts a high-purity gold plating process, uses a gold material with a purity of up to 99.9% or more as a plating layer, and both use an existing special elastic clamping mechanism with an elastic force of 320g, so that the pulse power special ceramic capacitor 104 can be in close contact with the positive and negative electrodes of the DC end, while avoiding damage to the pulse power special ceramic capacitor 104 due to excessive pressure. The K gold material combined with the elastic clamping mechanism can ensure the safe passage of extremely large currents and avoid arcing.

[0034] The gear mechanism 6 is arranged between the test mechanism 5 and the carrier 3. When the carrier 3 rotates, the gear mechanism 6 drives the test mechanism 5 to be pressed and connected with the positive and negative electrodes of the ceramic capacitor 104 to be tested. Specifically, the gear mechanism 6 includes an outer gear 61 arranged on the outer periphery of the disk 31, a gear bar 62 rotatably arranged on the first horizontal substrate 11, and two transmission gears 63 rotatably arranged on the positive box 51 and the negative box 52 respectively. The outer gear 61 is meshed with the middle part of the gear bar 62, and the two transmission gears 63 are respectively meshed with the two ends of the gear bar 62. The gear bar 62 rotates with the rotation of the disk 31, and the two transmission gears 63 rotate with the rotation of the gear bar 62, so that the positive elastic test needle 53 and the negative elastic test needle 54 respectively press the positive and negative electrodes of the ceramic capacitor 104.

[0035] The discharge mechanism 7 discharges the tested ceramic capacitor 104 from the isolation structure bin 32. Specifically, the discharge mechanism 7 includes a forward and reverse motor 71 arranged on the base 1 and located in front of the disc 31, a qualified connecting rod 72 and an unqualified connecting rod 73 respectively connected to the two output ends of the forward and reverse motor 71, a qualified push rod 74 and an unqualified push rod 75 respectively connected to the qualified connecting rod 72 and the unqualified connecting rod 73, and a qualified material box 76 and an unqualified material box 77 arranged on the base 1 and located behind the base 1. The qualified push rod 74 and the unqualified push rod 75 are inserted into the corresponding positioning holes 98 under the action of the forward and reverse motor 71 to push the corresponding ceramic capacitor 104 into the qualified material box 76 or the unqualified material box 77.

[0036] The circuit module includes a high-voltage excitation power supply 101, a high-voltage energy storage power supply 102 and a control logic circuit 103. The control logic circuit 103 includes a pulse module, a trigger tube VE, an adjustable inductor L1, an adjustable resistor R2, a current sensing coil TA, a high-voltage power supply meter V and a high-power resistor R3. The pulse module includes a high-voltage thyristor V1 whose anode is connected to the positive electrode of the high-voltage excitation power supply 101, a pulse generator connected to the control end of the high-voltage thyristor V1, a current limiting resistor R1 connected to the cathode of the high-voltage thyristor V1, and an excitation capacitor C1 connected between the current limiting resistor R1 and the negative electrode of the high-voltage excitation power supply 101. One end of the trigger tube VE is connected to one end of the excitation capacitor C1 connected to the current limiting resistor R1 and the adjustable inductor L1, and the other end is connected to one end of the adjustable resistor R2. The other end of the adjustable inductor L1 is respectively connected to one end of the current sensing coil TA and the positive electrode of the high-voltage energy storage power supply 102. The high-voltage power supply table V is respectively connected to the positive and negative electrodes of the high-voltage energy storage power supply 102. After the test mechanism 5 is connected to the positive and negative ends of the ceramic capacitor 104, the other end of the current sensing coil TA is connected to the positive electrode of the ceramic capacitor, the negative electrode of the ceramic capacitor is connected to one end of the high-power resistor R3, and the other end of the high-power resistor R3 is connected to the negative electrode of the power module.

[0037] The high-voltage excitation power supply 101 outputs a 5KV DC excitation voltage, and a current-limiting resistor R1 is connected in series. The voltage is applied to the excitation capacitor C1. The high-voltage thyristor V1 is controlled by a pulse generator to conduct and close at a high frequency, so that the excitation capacitor C1 emits a high-voltage excitation trigger tube VE to conduct, so that the tested ceramic capacitor 104 is short-circuited and discharged in a very short time. The high-voltage energy storage power supply 102 provides a 12KV DC high-voltage voltage and applies it to the tested ceramic capacitor 104. The adjustable inductor L1 and the adjustable resistor R2 connected in series in the adjustment loop adjust the discharge loop inductance and the discharge loop resistance in the loop in real time for specific test process parameters. During the test, the peak current of the test discharge can be monitored and recorded through the current sensing coil TA to determine whether it is a qualified product. The output voltage of the high-voltage energy storage power supply 102 is monitored through the high-voltage power supply meter V to ensure the accuracy of the test voltage.

[0038] In this embodiment, the trigger tube VE adopts a three-electrode inflatable switch device with a ceramic metal package, a self-breakdown voltage ≥ 28kV, an operating voltage 1~25kV, an operating current ≥ 50kA, and a trigger delay ≤ 80ns.

[0039] In order to realize the control of each motor and determine whether the tested ceramic capacitor 104 is a qualified product, a control chip is also provided in the control logic circuit, and the control chip is connected to each motor, and is connected to the current sensing coil TA and the high-voltage power supply meter V. The control process of the control chip on each motor and the process of determining whether it is a qualified product are both existing technologies.

[0040] The above description is only a preferred embodiment of the present invention, and therefore cannot be used to limit the scope of implementation of the present invention. That is, equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the specification should still fall within the scope covered by the patent of the present invention.

Claims

1. A pulse power special ceramic capacitor test device, characterized in that: The invention comprises a base, a feeding mechanism arranged on the base, a carrier, a carrier driving mechanism, a testing mechanism, a gear mechanism, a circuit module and a discharging mechanism. The feeding mechanism is used to transmit ceramic capacitors. The carrier comprises a vertically rotating disk and a plurality of isolation structure bins arranged on the disk at circumferential intervals for placing ceramic capacitors. The carrier driving mechanism is used to drive the carrier to rotate so that an idle isolation structure bin is connected to the output end of the feeding mechanism, the isolation structure bin for placing the ceramic capacitor to be tested is connected to the testing mechanism, and the isolation structure bin for placing the tested ceramic capacitor is connected to the discharging mechanism. The gear mechanism is arranged between the testing mechanism and the carrier. When the carrier rotates, the gear mechanism drives the test mechanism to press and connect the positive and negative electrodes of the ceramic capacitor to be tested. The discharge mechanism discharges the tested ceramic capacitor out of the isolation structure bin. The circuit module includes a high-voltage excitation power supply, a high-voltage energy storage power supply and a control logic circuit. The control logic circuit includes a pulse module connected to the output end of the high-voltage excitation power supply, a trigger tube connected to the output end of the pulse module at one end, and a high-power resistor connected to the output end of the high-voltage energy storage power supply at one end. When the test mechanism is connected to the positive and negative ends of the ceramic capacitor, the ceramic capacitor is connected to the trigger tube in parallel, and one end of the ceramic capacitor is connected to one end of the high-power resistor. The high-power The other end of the resistor is connected to the output end of the high-voltage energy storage power supply, and the other end of the high-power resistor is connected to the negative electrode of the high-voltage energy storage power supply; the carrier driving mechanism includes a carrier driving motor arranged on the base, an eccentric wheel arranged at the output end of the carrier driving motor, a driving plate connected to the eccentric wheel through a connecting rod and extending to the front of the disc, a push plate arranged at the upper part of the rear end of the driving plate and close to the connecting rod, a push rod arranged at the lower part of the rear end of the driving plate and away from the connecting rod, and a force-bearing block arranged at a circumferential interval at the front end of the disc and extending radially along the disc. After the test of the ceramic dielectric capacitor to be tested is completed, the carrier driving motor is activated and drives the eccentric wheel to rotate, and then drives the connecting rod to drive the eccentric wheel to rotate. The driving plate moves horizontally in a direction away from the center of the disc, and the push rod moves with the driving plate and applies an upward thrust to the nearest force block above it during the movement, thereby pushing the disc to rotate clockwise. The carrier drive motor continues to move to make the driving plate move horizontally toward the center of the disc. During this process, the push plate moves with the driving plate and applies an upward thrust to the nearest force block above it during the movement, thereby pushing the disc to rotate clockwise. The carrier drive motor stops moving when an idle isolation structure bin of the disc is connected to the output end of the discharge mechanism. At this time, the next isolation structure bin for placing the ceramic dielectric capacitor to be tested is connected to the test mechanism.

2. A pulse power special ceramic capacitor test device according to claim 1, characterized in that: The testing device also includes a guide mechanism, which includes a fixing seat arranged on the base, a guide plate horizontally arranged on the fixing seat and extending to the front of the driving plate, and a slide rail mechanism horizontally arranged between the driving plate and the guide plate.

3. A pulse power special ceramic capacitor test device according to claim 2, characterized in that: The testing device also includes a positioning mechanism, which includes a positioning motor arranged at the front end of the guide plate, a first vertical rod rotatably arranged at the output end of the positioning motor, an inclined rod arranged at the upper end of the first vertical rod and inclined backward, a second vertical rod arranged at the upper end of the inclined rod, a positioning needle horizontally arranged on the second vertical rod and extending backward, a third vertical rod arranged at the upper end of the guide plate, a horizontal rod rotatably connected to the third vertical rod and the first vertical rod at both ends, and a plurality of positioning holes circumferentially spaced on the disc and connected to each isolation structure compartment. During the process of the disc rotating to the next isolation structure compartment where the ceramic dielectric capacitor to be tested is placed and connected to the testing mechanism, the positioning motor is actuated to drive the positioning needle to move horizontally to approach the disc. When the disc stops rotating, the positioning needle is inserted into a positioning hole. After the test is completed, the positioning motor is actuated to drive the positioning needle to move out of the positioning hole.

4. A pulse power special ceramic capacitor test device according to claim 3, characterized in that: The testing mechanism comprises a positive electrode box and a negative electrode box which are arranged on a base in an inclined and rotatable manner, a fluorine liquid arranged in the positive electrode box and the negative electrode box, four positive electrode elastic test needles respectively extending from the four sides of the positive electrode box, and four negative electrode elastic test needles respectively extending from the four sides of the negative electrode box. When the disc rotates to connect the isolation structure compartment of the ceramic dielectric capacitor to be tested with the testing mechanism, one of the positive electrode elastic test needles is inserted into the corresponding positioning hole to contact and connect with the positive electrode of the ceramic dielectric capacitor, and one of the negative electrode elastic test needles is contacted and connected with the negative electrode of the ceramic dielectric capacitor through the opening of the isolation structure compartment.

5. A pulse power special ceramic capacitor test device according to claim 4, characterized in that: The gear mechanism includes an outer gear arranged on the outer periphery of the disc, a gear bar rotatably arranged on a base, and two transmission gears rotatably arranged on the positive box and the negative box respectively. The outer gear is meshed with the middle part of the gear bar, and the two transmission gears are meshed with the two ends of the gear bar respectively. The gear bar rotates with the rotation of the disc, and the two transmission gears rotate with the rotation of the gear bar, so that the positive elastic test needle and the negative elastic test needle press the positive and negative poles of the ceramic dielectric capacitor.

6. A pulse power special ceramic capacitor test device according to claim 5, characterized in that: The discharge mechanism includes a forward and reverse motor arranged on the base and located in front of the disc, a qualified push rod and an unqualified push rod respectively connected to the two output ends of the forward and reverse motors, and a qualified material box and an unqualified material box arranged on the base and located behind the base. The qualified push rod and the unqualified push rod can both be inserted into the positioning hole to push the corresponding ceramic dielectric capacitor into the qualified material box or the unqualified material box.

7. A pulse power special ceramic capacitor test device according to claim 5 or 6, characterized in that: The disc is made of polytetrafluoroethylene, and the positive electrode elastic test needle and the negative electrode elastic test needle are made of K gold material.

8. A pulse power special ceramic capacitor test device according to any one of claims 1 to 7, characterized in that: The circuit module also includes an adjustable inductor, an adjustable resistor, a current sensing coil and a high-voltage power supply meter. The pulse module includes a high-voltage thyristor whose anode is connected to the positive electrode of the high-voltage excitation power supply, a pulse generator connected to the control end of the high-voltage thyristor, a current limiting resistor connected to the cathode of the high-voltage thyristor, and an excitation capacitor connected between the current limiting resistor and the negative electrode of the high-voltage excitation power supply. The adjustable inductor is connected between the trigger tube and the current sensing coil, the current sensing coil is connected in series with the ceramic capacitor, the adjustable resistor is connected between the trigger tube and the ceramic capacitor, the high-voltage power supply meter is connected between the positive and negative electrodes of the high-voltage energy storage power supply, the high-voltage excitation power supply outputs an excitation voltage, and the high-voltage energy storage power supply outputs a high-voltage DC voltage.

9. A pulse power special ceramic capacitor test device according to any one of claims 1 to 7, characterized in that: The carrier also includes a support rod which is arranged on the base and extends forward transversely, and the disc is rotatably arranged on the support rod.

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