Miniaturized exploding foil initiator based on rbdt

Abstract

The application belongs to the technical field of exploding foil initiator, and specifically discloses a miniaturized exploding foil initiator based on RBDT. Through the application, the selected DSRD, the semiconductor control switch, the RBDT, the first diode and the second diode are all bare chips, each module is designed as an equal-length and equal-width stacked electric connection, the volume of each module is greatly reduced, the miniaturization of the entire exploding foil initiator is realized, and the volume of the entire exploding foil initiator is not more than 5 cm 3 .

Description

Technical Field

[0001] This application belongs to the field of explosive foil initiators, and more specifically, relates to a miniaturized explosive foil initiator based on RBDT. Background Technology

[0002] The explosive foil initiator mainly consists of a high-voltage switch, a pulse energy storage capacitor, a bridge foil, and a load. The high-voltage switch is a key component of the explosive foil initiator, and its performance is subject to high requirements. First, it must be able to withstand high voltages of 1-3kV; second, it must allow a current pulse with the following characteristics to pass smoothly at the moment of triggering: a rise time of 30-300ns, a peak current of 2-4kA, and a power of 2-10MW. Therefore, the operating conditions of the high-voltage switch are very demanding, requiring low resistance and inductance, high conductivity, good stability, and preventing false triggering due to interference. With the development of explosive foil initiators, there is a growing demand for miniaturization and integration in their size.

[0003] A reverse blocking diode thyristor (RBDT) is a two-terminal semiconductor closed-loop switch with a PNPN structure. During RBDT activation, a trigger pulse with a high rate of voltage change (dv / dt) needs to be applied between the anode and cathode. The unique triggering mechanism of the RBDT ensures that its conduction process occurs across the entire device area, allowing it to withstand pulse currents with a higher rate of current rise (di / dt). Furthermore, as a two-terminal device, the RBDT facilitates integration with other components in explosive foil detonators, enabling miniaturization.

[0004] However, most existing RBDT-based explosive foil initiators use PCB integration technology, which results in a large overall module size, approximately 720 cm². 3 It cannot meet the requirements for miniaturization. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this application is to provide a miniaturized explosive foil initiator based on RBDT, which aims to solve the problem that the integration method of existing RBDT-based explosive foil initiators cannot meet the miniaturization requirements.

[0006] To achieve the above objectives, this application provides a miniaturized explosive foil initiator based on RBDT, comprising: a first module and a second module;

[0007] The first module includes: a primary-side energy storage capacitor, a semiconductor control switch, a transformer, a secondary-side energy storage capacitor, and a DSRD; wherein, the DSRD and the semiconductor control switch are both bare chips, the primary-side energy storage capacitor and the semiconductor control switch are of equal length and width and are stacked in sequence for electrical connection; the secondary-side energy storage capacitor and the DSRD are of equal width and their combined length does not exceed that of the primary-side energy storage capacitor.

[0008] The second module includes: a second diode, a main circuit capacitor, an RBDT, a first diode, and an explosion foil chip; wherein, the RBDT, the first diode, and the second diode are all bare chips, and the second diode, the main circuit capacitor, the RBDT, and the first diode are of equal length and width and are stacked in sequence for electrical connection;

[0009] The same-name terminal of the primary winding of the transformer is electrically connected to the cathode of the semiconductor control switch, and the opposite-name terminal is electrically connected to the negative terminal of the primary energy storage capacitor.

[0010] The same-name terminal of the secondary winding of the transformer is electrically connected to the anode of the DSRD, and the opposite-name terminal is electrically connected to the negative terminal of the secondary energy storage capacitor.

[0011] One end of the exploding foil chip is electrically connected to the cathode of the second diode, and the other end is electrically connected to the anode of the RBDT;

[0012] The DSRD anode, the negative terminal of the main circuit capacitor, and the RBDT cathode are at the same potential;

[0013] The positive terminal of the secondary energy storage capacitor, the cathode of the DSRD, and the anode of the first diode are at the same potential.

[0014] Preferably, the primary-side energy storage capacitor, the secondary-side energy storage capacitor, the main circuit capacitor, and the transformer are all cubic structures.

[0015] Preferably, the primary-side energy storage capacitor, the secondary-side energy storage capacitor, and the main circuit capacitor are high-voltage ceramic capacitors.

[0016] Preferably, the transformer is a planar transformer made of nanocrystalline material.

[0017] Preferably, the stacked electrical connection is a stacked welding.

[0018] Preferably, the first module and the second module have the same width and height.

[0019] Preferably, the height of the secondary-side energy storage capacitor is equal to the sum of the heights of the RBDT and the first diode.

[0020] Preferably, the sum of the heights of the energy storage capacitor, the semiconductor control switch, and the transformer is equal to the sum of the heights of the second diode and the main circuit capacitor.

[0021] Preferably, equipotential is achieved through a conductive plate.

[0022] Preferably, the volume of the explosive foil initiator does not exceed 5 cm².3 .

[0023] Overall, the technical solutions conceived in this application have the following beneficial effects compared with the prior art:

[0024] This application provides a miniaturized explosive foil initiator based on RBDT. The selected DSRD, semiconductor control switch, RBDT, first diode, and second diode are all bare chips, and each module is designed as a stacked electrical connection with equal length and width, which greatly reduces the volume of each module and realizes the miniaturization of the entire explosive foil initiator. Attached Figure Description

[0025] Figure 1 This is a circuit diagram of an RBDT-based explosive foil initiator provided in an embodiment of this application.

[0026] Figure 2 This is a schematic diagram of a miniaturized explosive foil initiator based on RBDT provided in an embodiment of this application.

[0027] Figure 3 This is a schematic diagram of the output current waveform of a miniaturized explosive foil initiator based on RBDT provided in an embodiment of this application. Detailed Implementation

[0028] For ease of understanding, the English abbreviations and related technical terms used in the embodiments of this application will be explained and described below.

[0029] The embodiments of this application are described below with reference to the accompanying drawings.

[0030] like Figure 1 As shown, the RBDT-based explosive foil initiator consists of a primary-side energy storage capacitor C1, a semiconductor control switch Q, a transformer Tr, a secondary-side energy storage capacitor C2, a DSRD (Drift Step Recovery Diode), a first diode D1, a second diode D2, a high-voltage switch RBDT, and a load R. L It consists of the main circuit capacitor C0.

[0031] Circuit 1: The positive terminal of the primary energy storage capacitor C1 is connected to the anode of the semiconductor control switch, the cathode of the semiconductor control switch is connected to the same-name terminal of the primary winding w1 of the transformer Tr, and the opposite-name terminal of w1 is connected to the negative terminal of the primary energy storage capacitor C1.

[0032] Circuit 2: The same-name terminal of the secondary winding w2 of transformer Tr is connected to the anode of DSRD, the cathode of DSRD is connected to the positive terminal of the secondary energy storage capacitor C2, and the opposite-name terminal of w2 is connected to the negative terminal of the secondary energy storage capacitor C2.

[0033] Circuit 3: The cathode of DSRD is connected to the anode of the first diode D1, the cathode of the first diode D1 is connected to the anode of RBDT, and the cathode of RBDT is connected to the anode of DSRD.

[0034] Circuit 4: The cathode of the RBDT is connected to the negative terminal of the main circuit capacitor C0, the positive terminal of the main circuit capacitor C0 is connected to the anode of the second diode D2, and the cathode of the second diode D2 is connected to the load R. L One end, load R L The other end is connected to the anode of the RBDT.

[0035] The specific workflow of the four loops is as follows:

[0036] 1) When capacitor C1 is charged, the bottom is positive and the top is negative; when capacitor C0 is charged, the bottom is positive and the top is negative.

[0037] 2) When the control switch Q is turned on, capacitor C1 discharges in circuit 1, thereby charging capacitor C2 in circuit 2, with the polarity being positive on the right and negative on the left.

[0038] 3) Capacitor C2 discharges in the C2-D1-RBDT-w2 circuit. Since DSRD has a high-speed turn-off function, a high dv / dt voltage pulse is formed on RBDT, thus turning on RBDT.

[0039] 4) Capacitor C0 discharges in circuit 4. Because the RBDT has a high current rise rate tolerance, it can discharge at the load R... L A current pulse with a fast rising edge is generated on the load R. L To achieve gasification.

[0040] The explosive foil initiator uses a reverse-blocking double-ended solid-state thyristor as a high-voltage switch, which can be reused multiple times and has the advantages of long life, strong robustness, and high reliability. Furthermore, as a two-terminal device, the RBDT is easily integrated with other components in the explosive foil initiator.

[0041] RBDT-based explosive foil initiators often integrate components at both ends, such as DSRD, diodes, RBDT, and capacitors, which further reduces manufacturing costs.

[0042] like Figure 2 As shown, this application provides a miniaturized explosive foil initiator based on RBDT, comprising: a first module and a second module;

[0043] The first module includes: primary-side energy storage capacitor C1, semiconductor control switch Q, transformer Tr, secondary-side energy storage capacitor C2 and DSRD; wherein, DSRD and semiconductor control switch Q are both bare chips, primary-side energy storage capacitor C1 and semiconductor control switch Q are of equal length and width and are stacked in sequence for electrical connection; secondary-side energy storage capacitor C2 and DSRD are of equal width and their combined length does not exceed that of primary-side energy storage capacitor C1.

[0044] The second module includes: a second diode D2, a main circuit capacitor C0, an RBDT, a first diode D1, and an explosive foil chip; wherein, the RBDT, the first diode D1, and the second diode D2 are all bare chips, and the second diode D2, the main circuit capacitor C0, the RBDT, and the first diode D1 are of equal length and width and are stacked in sequence for electrical connection.

[0045] The same-name terminal of the primary winding w1 of transformer Tr is electrically connected to the cathode of semiconductor control switch Q, and the opposite-name terminal is electrically connected to the negative terminal of primary energy storage capacitor.

[0046] The same-name terminal of the secondary winding w2 of transformer Tr is electrically connected to the anode of DSRD, and the opposite-name terminal is electrically connected to the negative terminal of the secondary energy storage capacitor C2.

[0047] One end of the exploding foil chip is electrically connected to the cathode of the second diode D2, and the other end is electrically connected to the anode of the RBDT;

[0048] The anode of DSRD, the cathode of main circuit capacitor C0, and the cathode of RBDT are at the same potential;

[0049] The positive terminal of the secondary energy storage capacitor C2, the cathode of DSRD, and the anode of D1 are at the same potential.

[0050] It should be noted that a bare chip refers to a semiconductor device in its final form after manufacturing, before packaging. Compared to packaged semiconductor devices, its size is significantly reduced. The exploded foil chip serves as the load RL. The gate of the semiconductor control switch Q is connected to the trigger signal.

[0051] Preferably, the primary-side energy storage capacitor C1, the secondary-side energy storage capacitor C2, the main circuit capacitor C0, and the transformer Tr are all cubic structures.

[0052] Preferably, the primary-side energy storage capacitor C1, the secondary-side energy storage capacitor C2, and the main circuit capacitor C0 are high-voltage ceramic capacitors.

[0053] Preferably, the transformer Tr is a planar transformer made of nanocrystalline material.

[0054] It should be noted that planar transformers use single-layer or multi-layer PCB boards, copper foil, and other materials to replace the copper conductors in ordinary transformers. The magnetic cores used in planar transformers are small in size, large in area, and flat in shape, resulting in better heat dissipation and thus higher efficiency. Furthermore, planar transformers have advantages such as compact structure, excellent insulation performance, good coupling, low leakage inductance, and ease of surface-mount production, making them suitable for the trend of product miniaturization and high power density. Since nanocrystalline materials have higher permeability than ferrite, the transformer size can be reduced while maintaining the same boost effect. Therefore, this application uses a nanocrystalline material planar transformer for voltage boosting, improving the triggering efficiency of RBDT devices and the output capability of the module, increasing the output current capability by 16.7%.

[0055] Preferably, the stacked electrical connection is a stacked welding.

[0056] It should be noted that the components are connected by soldering, which eliminates the bonding wires of traditional PCB integration, reduces the parasitic parameters of the circuit, and improves the triggering efficiency of the device.

[0057] Preferably, the first module and the second module have the same width and height.

[0058] Preferably, the height of the secondary-side energy storage capacitor C2 is equal to the sum of the heights of the RBDT and the first diode D1.

[0059] Preferably, the sum of the heights of the energy storage capacitor C1, the semiconductor control switch Q, and the transformer Tr is equal to the sum of the heights of the second diode D2 and the main circuit capacitor C0.

[0060] Preferably, equipotential is achieved through a conductive plate, such as a copper sheet.

[0061] Preferably, the volume of the explosive foil initiator does not exceed 5 cm². 3 .

[0062] The primary-side energy storage capacitor C1 and the semiconductor control switch Q are of equal length and width, not exceeding 10mm*10mm, and their heights are not exceeding 5mm and 1mm respectively; the secondary-side energy storage capacitor C2 and DSRD are of equal width, not exceeding 10mm, their lengths are not exceeding 5mm and 5mm respectively, and their heights are not exceeding 2mm and 2mm respectively.

[0063] The second diode D2, the main circuit capacitor C0, the RBDT and the first diode D1 are of equal length and width, not exceeding 10mm*10mm, and their heights are not exceeding 2mm, 6mm, 2mm and 2mm respectively.

[0064] In this embodiment, the primary-side energy storage capacitor C1 and the semiconductor control switch Q are of equal length (8mm) and width (8mm), with heights of 2.5mm and 1mm respectively; the transformer Tr has dimensions of 8mm*8mm*4mm; the secondary-side energy storage capacitor C2 and DSRD are of equal width (8mm), with lengths of 2.8mm and 2.5mm respectively, and heights of 1.5mm and 1mm respectively; the second diode D2, the main circuit capacitor C0, RBDT, and the first diode D1 are of equal length (8mm) and width (8mm), with heights of 1mm, 6mm, 1.5mm, and 1.5mm respectively. Therefore, the overall area of ​​the discharge circuit 4 does not exceed 1cm². 2 The total area of ​​loops 1, 2, and 3 is less than 1 cm². 2 Therefore, the entire volume of the explosive foil detonator is less than 2cm². 3 This meets the requirement of miniaturizing the explosive foil initiator.

[0065] The current output capability of the explosive foil initiator is as follows: Figure 3 As shown, the current reaches 2.8kA, the rise time is 200ns, and the output di / dt is greater than 10kA / μs, which meets the requirements of the vaporization explosion foil chip.

[0066] It should be understood that expressions such as “comprising” and “may include” used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as “comprising” and / or “having” are to be interpreted as indicating a particular characteristic, number, operation, constituent element, component, or combination thereof, but not to exclude the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0067] Furthermore, in this application, the expression "and / or" includes any and all combinations of the associated listed words. For example, the expression "A and / or B" may include A, may include B, or may include both A and B.

[0068] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after connection. "Rotary connection" refers to a connection where the components can rotate relative to each other after connection. "Sliding connection" refers to a connection where the components can slide relative to each other after connection. The directional terms mentioned in the embodiments of this application, such as "top," "bottom," "inner," "outer," "left," and "right," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0069] Furthermore, the mathematical concepts mentioned in the embodiments of this application, such as symmetry, equality, parallelism, and perpendicularity, are limitations specific to the current technological level, rather than absolute and strict mathematical definitions. Slight deviations are permissible; approximations of symmetry, equality, parallelism, and perpendicularity are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 and 10 degrees. "A and B are perpendicular" means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 and 100 degrees.

[0070] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A miniaturized explosive foil initiator based on RBDT, characterized in that, include: Module 1 and Module 2; The first module includes: a primary-side energy storage capacitor, a semiconductor control switch, a transformer, a secondary-side energy storage capacitor, and a DSRD; wherein, the DSRD and the semiconductor control switch are both bare chips, the primary-side energy storage capacitor and the semiconductor control switch are of equal length and width and are stacked in sequence for electrical connection; the secondary-side energy storage capacitor and the DSRD are of equal width and their combined length does not exceed that of the primary-side energy storage capacitor. The second module includes: a second diode, a main circuit capacitor, an RBDT, a first diode, and an explosion foil chip; wherein, the RBDT, the first diode, and the second diode are all bare chips, and the second diode, the main circuit capacitor, the RBDT, and the first diode are of equal length and width and are stacked in sequence for electrical connection; The same-name terminal of the primary winding of the transformer is electrically connected to the cathode of the semiconductor control switch, and the opposite-name terminal is electrically connected to the negative terminal of the primary energy storage capacitor. The same-name terminal of the secondary winding of the transformer is electrically connected to the anode of the DSRD, and the opposite-name terminal is electrically connected to the negative terminal of the secondary energy storage capacitor. One end of the exploding foil chip is electrically connected to the cathode of the second diode, and the other end is electrically connected to the anode of the RBDT; The DSRD anode, the negative terminal of the main circuit capacitor, and the RBDT cathode are at the same potential; The positive terminal of the secondary energy storage capacitor, the cathode of the DSRD, and the anode of the first diode are at the same potential.

2. The miniaturized explosive foil initiator as described in claim 1, characterized in that, The primary-side energy storage capacitor, secondary-side energy storage capacitor, main circuit capacitor, and transformer are all cubic structures.

3. The miniaturized explosive foil initiator as described in claim 2, characterized in that, The primary-side energy storage capacitor, secondary-side energy storage capacitor, and main circuit capacitor are all high-voltage ceramic capacitors.

4. The miniaturized explosive foil initiator as described in claim 2, characterized in that, The transformer is a planar transformer made of nanocrystalline material.

5. The miniaturized explosive foil initiator as described in claim 1, characterized in that, Stacked electrical connections are achieved through stacked soldering.

6. The miniaturized explosive foil initiator as described in claim 1, characterized in that, The first module and the second module have the same width and height.

7. The miniaturized explosive foil initiator as described in claim 6, characterized in that, The height of the secondary-side energy storage capacitor is equal to the sum of the heights of the RBDT and the first diode.

8. The miniaturized explosive foil initiator as described in claim 6, characterized in that, The sum of the heights of the primary-side energy storage capacitor, the semiconductor control switch, and the transformer is equal to the sum of the heights of the second diode and the main circuit capacitor.

9. The miniaturized explosive foil initiator as described in claim 1, characterized in that, Equipotential is achieved through a conductive plate.

10. The miniaturized explosive foil initiator according to any one of claims 1 to 9, characterized in that, The volume of the explosive foil detonator should not exceed 5 cm. 3 .

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