CN111900136B - Turn-off thyristor device with split gate drive - Google Patents

Abstract

The invention discloses a turn-off thyristor device with separated gate drive, comprising: the turn-off thyristor shell and the accessory interface board, the gate drive board and the connection structure; the turn-off thyristor shell and the auxiliary interface board are connected in a low-inductance integrated connection mode; the gate pole driving board comprises a driving circuit module; the auxiliary interface board and the gate drive board are detachably connected through the connecting structure, so that the separation or combination between the turn-off thyristor tube shell and the gate drive board is realized.

Description

Turn-Off Thyristor Device with Discrete Gate Drive

technical field

The present invention relates to the technical field of semiconductors, in particular to a turn-off thyristor device with separate gate drive.

Background technique

As a new type of large-capacity power electronic switching device, the turn-off thyristor has the advantages of reduced on-state voltage and large inrush current, and has important applications in solid-state circuit breakers, converters, power electronic transformers and other fields. IGCT and ETO are two different driving methods commonly used to turn off thyristors. Their electrical topologies are shown in Figure 1a and Figure 1b, respectively, which include two parts, the turn-off thyristor element and the integrated gate driver, which trigger the turn-on. When it is turned off, the driving circuit injects a trigger current of several hundred amperes into the gate (G). The emitter (E) current is rapidly commutated to the gate turn-off circuit (QG and COFF, the typical commutation time is about 1us), and the ETO drive circuit switches between two sets of MOSFETs (turns off QE and turns on QG at the same time) , the emitter (E) current is rapidly commutated to the gate turn-off circuit (QG, the typical commutation time is about 1us) to achieve hard turn-off drive conditions.

Since the emitter current needs to be quickly commutated to the gate during turn-off, the parasitic inductance of the commutation loop between the gate-driven turn-off circuit and the turn-off thyristor element is required to be small (typical parameter is on the order of nH). In order to achieve this purpose, the current IGCT and ETO both use the drive circuit board and the thyristor element that can be turned off in an integrated and tightly connected way. If the gate driver fails during use, the gate driver cannot be directly disassembled or replaced. Removing the turn-off thyristor device as a whole from the press-fit assembly greatly increases the maintenance cost of the assembly. In addition, the relative position of the bulky gate drive and the turn-off thyristor case is fixed, which is not conducive to the flexibility of the design of the press-fit assembly of the turn-off thyristor device, and affects the design of radiators, copper bars, and water cooling systems.

SUMMARY OF THE INVENTION

In view of the above problems, the present invention provides a turn-off thyristor device with separate gate drive, which includes:

The turn-off thyristor case and the auxiliary interface board are connected by a low-inductance integrated connection method;

Gate driver board, including driver circuit module;

A connection structure, through which the auxiliary interface board and the gate drive board are detachably connected, so as to realize the separation or combination between the turn-off thyristor case and the gate drive board.

In the above-mentioned turn-off thyristor device, the connection structure is a rigid connection structure.

In the above-mentioned turn-off thyristor device, a first connection hole is respectively opened on the overlapping part of the auxiliary interface board and the gate drive board, and the rigid connection structure includes: a screw and a nut, one end of the screw is After passing through the first connecting hole, it is connected with the nut.

In the above-mentioned turn-off thyristor device, the rigid connection structure includes:

an upper fastener, arranged above the gate drive plate;

a lower fastener, arranged below the auxiliary interface board;

Two fixing pieces are connected to the upper fastener and the lower fastener.

The above-mentioned turn-off thyristor device, wherein, at least one first positioning hole is opened on the auxiliary interface and the gate drive plate respectively, and the upper fastener and/or the lower fastener are At least one positioning portion is also provided, and the positioning portion is correspondingly penetrated on the first positioning hole.

The above-mentioned thyristor device that can be turned off, wherein the fixing member is a bolt, one of the two bolts is connected to one end of the upper fastener and the lower fastener, and one of the two bolts is connected to one end of the upper fastener and the lower fastener. The other one is connected to the other ends of the upper fastener and the lower fastener.

The above-mentioned turn-off thyristor device, wherein the fixing member is a buckle, one of the two buckles is connected to one end of the upper fastener and the lower fastener, and the two buckles are The other one of the buckles is connected to the other ends of the upper fastener and the lower fastener.

The above-mentioned turn-off thyristor device, wherein the fixing member is an eccentric, one of the two eccentrics is connected to one end of the upper fastener and the lower fastener, and the two eccentrics are connected to one end of the upper fastener and the lower fastener. The other one of the wheels is connected to the other ends of the upper fastener and the lower fastener.

In the above-mentioned turn-off thyristor device, the connection structure is a flexible connection structure.

The above-mentioned turn-off thyristor device, wherein the auxiliary interface board includes a first part and a second part, the first part and the overlapping part of the gate drive board are respectively provided with second connection holes, and the flexible connection The structure includes:

a flexible printed board, connecting the first part and the second part;

A screw and a nut, one end of the screw is connected with the nut after passing through the second connection hole.

In the above-mentioned turn-off thyristor device, the auxiliary interface board includes a first part and a second part, and the flexible connection structure includes:

an upper fastener, arranged above the gate drive plate;

a lower fastener, arranged below the auxiliary interface board;

a flexible printed board, connecting the first part and the second part;

The fixing piece is connected to the upper fastener and the lower fastener.

In the above-mentioned turn-off thyristor device, the flexible connection structure includes:

a flexible printed board pressing interface, disposed on the gate driver board and electrically connected to the gate driver board;

The pressing device is arranged on the pressing interface of the flexible printed board;

A flexible printed board, one end of which is connected to the auxiliary interface board, the other end of the flexible printed board is pressed on the gate driving board by the pressing device, and the flexible printed board is connected to the The auxiliary interface board and the gate drive board are electrically connected with low impedance.

In the above-mentioned turn-off thyristor device, the flexible connection structure includes:

One end of the composite row is connected to the gate driving board, and the other end of the composite row is connected to the auxiliary interface board.

The above-mentioned turn-off thyristor device, wherein, the auxiliary interface board and the gate driver board are both multi-layer PCB boards, and the copper-laying structure of the auxiliary interface board and the gate driver board is: gate and The potentials of the emitters are distributed between phases, and the current is realized by contacting the corresponding exposed metal areas with each other, and a plurality of via holes are arranged between the layers near the copper-laying area.

To sum up, the effect of the present invention compared with the prior art is that the present invention has a separate gate-driven turn-off thyristor device (including IGCT and ETO, etc.) with two connection modes: rigid contact and flexible contact. The gate commutation loop has low parasitic inductance when it is turned off, and at the same time, it can realize the separation of the turn-off thyristor device case and the gate driver. When the driver needs to be replaced, only the gate driver is disassembled separately, which is convenient for online maintenance and replacement. A variety of different low-impedance connection methods can be used between the gate driver and the case to suit different applications.

Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure pointed out in the description, claims and drawings.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

Figure 1a shows the IGCT electrical topology;

Figure 1b shows the ETO electrical topology;

2 is a schematic diagram of a rigid connection structure of the present invention;

FIG. 3 is a schematic diagram of a copper-laying structure with low parasitic inductance;

4 is a schematic structural diagram of the first embodiment;

5 is a schematic structural diagram of a second embodiment;

6 is a schematic structural diagram of a third embodiment;

7 is a schematic structural diagram of a fourth embodiment;

8 is a schematic diagram of the flexible connection structure of the present invention;

9 is a schematic structural diagram of a fifth embodiment;

10 is a schematic structural diagram of the sixth embodiment;

11 is a schematic structural diagram of a seventh embodiment;

FIG. 12 is a schematic structural diagram of the eighth embodiment.

Wherein, the reference numerals are;

Prior art Figure 1a:

1: Can turn off the thyristor element part 7: IGCT cathode K

2: Integrated gate drive section 8: Turn off the capacitor precharge power supply

3: Turn off thyristor chip 9: Turn off control MOSFET Q _G

4: Turn off the thyristor emitter E 10: Turn off the capacitor C _OFF

5: thyristor gate G can be turned off 11: turn on trigger current source

6: IGCT anode A

Prior art Figure 1b:

1: Turn off the thyristor element part 6: ETO anode A

2: Integrated gate drive section 7: ETO cathode K

3: Turn off the thyristor chip 8: Turn off the emitter control MOSFET Q _E

4: Turn off thyristor emitter E 9: Turn off gate control MOSFET Q _G

5: Turn off thyristor gate G 10: Turn on trigger current source

this invention:

P1: Top layer of plate A (gate potential) P11: Top layer of plate B (gate potential)

P2: A plate intermediate layer 1 (emitter potential) P12: B plate intermediate layer 1 (emitter potential)

P3: Intermediate layer 2 of plate A (gate potential) P13: Intermediate layer 2 of plate B (gate potential)

P4: Bottom layer of plate A (emitter potential) P14: Bottom layer of plate B (emitter potential)

P5: Insulation layer of A board P15: Insulation layer of B board

P6: Emitter Potential Via P16: Emitter Potential Via

P7: Gate potential via P17: Gate potential via

P8: Exposed metal area of gate electrode of A board P18: Bare metal area of gate electrode of board B

P9: Exposed metal area of the emitter of plate A P19: Exposed metal area of the emitter of plate B

P10: A board (gate drive PCB board) P20: B board (PCB interface board attached to the case)

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As used herein, "comprising," "including," "having," "containing," and the like, are open-ended terms, meaning including but not limited to.

As used herein, "plurality" includes "two" and "two or more."

Please refer to FIG. 2 , which is a schematic diagram of the rigid connection structure of the present invention. As shown in FIG. 2 , a turn-off thyristor device with separate gate drive of the present invention includes: a turn-off thyristor case 11 , an auxiliary interface board 12 , a gate drive board 13 and a rigid connection structure 14 ; The switchable thyristor case 11 and the auxiliary interface board 12 are connected by a low-inductance integrated connection; the gate driver board 13 includes a driving circuit module 131 ; the auxiliary interface board is connected through the connection structure 14 12 and the gate driving board 13 are detachably connected, so as to realize the separation or combination between the turn-off thyristor case 11 and the gate driving board 13 .

Specifically, the connection between the turn-off thyristor case 11 and the auxiliary interface board 12 follows the low-inductance integrated connection structure of the prior art, and the two are fixed when the turn-off thyristor device is installed, and are not thereafter After disassembling, one end of the auxiliary interface board 12 is processed with an interface specially used for connection, and the board does not contain any circuit components; the gate driver board contains all the circuit function modules of the traditional drive, and one end is processed with an interface specially used for connection; the rigid connection structure 14 The auxiliary interface board 12 and the gate drive board 13 are in direct contact, and a reliable low-impedance connection is ensured.

Please refer to FIG. 3 . FIG. 3 is a schematic diagram of a copper-laying structure with low parasitic inductance. In this embodiment, the auxiliary interface board 12 and the gate driver board 13 are both PCB boards, and there are two strong electric potentials that need to be connected between the two PCBs, namely the gate electrode (G) and the emitter electrode (G). E), the typical electrical parameters are the continuous current capacity of tens of amperes, the microsecond instantaneous current capacity of thousands of amperes, and the insulation withstand voltage of tens of volts. In order to achieve low parasitic inductance at the connection, special design of the PCB circuit and copper structure is required. As shown in Figure 3, both PCB boards in Figure 3 are multi-layer boards (take a four-layer board as an example), and the gate and emitter potentials are distributed alternately; the two boards are placed on top of each other and are realized by contacting the corresponding exposed metal areas with each other. Through current, different exposed metal areas are respectively connected to the gate potential and emitter potential of the PCB board. Bare metal areas can be achieved by processes such as tin plating or immersion gold. Sufficient spacing is reserved between the copper-laying areas of the two electrodes to achieve insulation and meet mechanical positioning errors; a large number of via holes are processed near the copper-laying area between each layer to ensure the mutual flow capacity between different layers of the PCB multilayer board. The holes are staggered to avoid short circuits. The distance between the layers of copper in this structure is very small, and there is no obvious current convergence at the connection (different from the connection methods such as wires and cables). The area enclosed by the loop between the off-MOSFET groups) is significantly increased, so the parasitic inductance can be lower than tens to hundreds of pH.

Please refer to FIG. 4 , which is a schematic structural diagram of the first embodiment. As shown in FIG. 4 , first connection holes K1 are respectively formed on the overlapping parts of the auxiliary interface board 12 and the gate drive board 13 , and the rigid connection structure 14 includes screws 141 and nuts 142 . The screws One end of 141 is connected to the nut 142 after passing through the first connection hole K1, wherein J1 is the gate contact of the exposed metal area of the two PCB boards, and J2 is the emitter contact of the exposed metal area of the two PCB boards.

Specifically, a first connection hole K1 is formed on the auxiliary interface board 12 and the gate driving board 13, and the screws 141 are used for fixing directly. The nuts 142 can be directly processed on the external protection structure of the driving board, and can also be used Discrete fasteners with threaded construction. In this embodiment, the number, diameter, and material of the screws can be adjusted according to the actual tightening force requirements, so as to ensure that the contact resistance is lower than an acceptable value.

Please refer to FIG. 5 , which is a schematic structural diagram of the second embodiment. As shown in FIG. 5 , the rigid connection structure includes: an upper fastener 143, a lower fastener 144 and two fixing parts 145; the upper fastener 143 is arranged above the gate drive plate 13; the lower fastener The fastener 144 is disposed below the auxiliary interface board 12 ; the two fasteners 145 are connected to the upper fastener 143 and the lower fastener 144 . Specifically, the auxiliary interface board and the gate driver board are stacked up and down, and strip fasteners are applied on the upper and lower sides of the auxiliary interface board 12 and the gate driver board 13 respectively, and the two are fastened. The two fasteners can be made of high-strength insulating material or high-strength metal with surface insulation treatment, or conductive metal. The metal and the cathode of the device keep the same potential. J3 is the exposed metal area of the two PCB boards. touch.

It should be noted that, although the above fasteners 143 are provided above the gate driving board 13 and the lower fasteners 144 are provided below the auxiliary interface board 12 for illustration in the present invention, the present invention does not take This is limited. In practice, as long as the auxiliary interface board 12 and the gate drive board 13 are located between the upper fastener and the lower fastener, for example, the upper fastener 143 can also be arranged on the auxiliary interface board 12 Above, the lower fastener 144 is disposed below the gate driving board 13 .

In order to facilitate the positioning of the PCB board, the protruding positioning portion can be processed on the upper fastener in the figure to cooperate with the positioning holes on the two PCBs to achieve high precision. Specifically, the auxiliary interface board 12 and the gate drive board 13 are respectively provided with at least one first positioning hole K2, and in this embodiment, the upper fastener 143 is also provided with at least one first positioning hole K2. The positioning portion 1431 and the lower fastener 144 are also provided with a first positioning hole K2 corresponding to the positioning portion 1431 , and the positioning portion 1431 is correspondingly penetrated through the first positioning hole K2 .

It is worth noting that in this embodiment, the positioning portion 1431 is provided on the upper fastener 143, but the present invention is not limited to this, and in another embodiment of the present invention, the lower fastener 144 may also be provided If the positioning part is used, the upper fastener 143 is provided with the first positioning hole K2. In another embodiment of the present invention, the lower fastener 144 and the upper fastener 143 can also be provided with alignment parts. , the present invention does not limit the shape of the positioning portion.

In this embodiment, the fixing member 145 is a bolt, one of the two bolts is connected to one end of the upper fastener and the lower fastener, and the other of the two bolts is connected The diameter and material of the bolts at the other ends of the upper fastener and the lower fastener can be adjusted according to the actual application of the tightening force.

Please refer to FIG. 6 , which is a schematic structural diagram of a third embodiment. The turn-off thyristor device shown in FIG. 6 is substantially the same as the turn-off thyristor device shown in FIG. 5 , so the same parts will not be repeated here, and the different parts will now be described as follows. As shown in FIG. 6 , the fixing member 145 is a buckle, one of the two buckles is connected to one end of the upper fastener 143 and the lower fastener 144 , and the two buckles The other one of them is connected to the other end of the upper fastener 143 and the lower fastener 144, wherein the shape and material of the buckle can be adjusted according to the actual tightening force requirements.

Please refer to FIG. 7 , which is a schematic structural diagram of a fourth embodiment. The turn-off thyristor device shown in FIG. 7 is substantially the same as the turn-off thyristor device shown in FIG. 5 , so the same parts will not be repeated here, and the different parts will now be described as follows. As shown in FIG. 7 , the fixing member 145 is an eccentric, one of the two eccentrics is connected to one end of the upper fastener 143 and the lower fastener 144 , and the two eccentrics are connected to one end of the upper fastener 143 and the lower fastener 144 The other one of them is connected to the other end of the upper fastener 143 and the lower fastener 144, wherein the diameter of the eccentric wheel, the material, and the fixing method of the lower fastener can be adjusted according to the actual tightening force requirements. Adjustment.

Please refer to FIG. 8 , which is a schematic diagram of the flexible connection structure of the present invention. As shown in FIG. 8 , a turn-off thyristor device with separate gate drive of the present invention includes: a turn-off thyristor case 11 , an auxiliary interface board 12 , a gate drive board 13 and a flexible connection structure 15 . The turn-off thyristor device shown in FIG. 8 is substantially the same as the turn-off thyristor device shown in FIG. 2 , so the same parts will not be repeated here, and the different parts will now be described as follows.

The basic structure of this connection method is divided into the turn-off thyristor case 11 and the auxiliary interface board 12 , the gate drive board 13 , and the flexible connection structure 15 , as shown in FIG. 8 , wherein the turn-off thyristor 11 and the auxiliary interface board 12 The connection between them follows the low-inductance integrated connection structure of the prior art. The two are fixed when the thyristor device can be turned off when the assembly is installed, and then they will not be disassembled. The auxiliary interface board 12 does not contain any circuit components; the gate drive board 13 includes a traditional drive module 131, and one end is processed with an interface specially used for connection; the flexible connection structure 15 realizes a reliable low-resistance and low-inductance electrical connection between two PCB boards.

It should be noted that, in another embodiment of the present invention, the flexible connection structure 15 may also be formed by processing together with the auxiliary interface board 12 .

This solution needs to design a fixed structure on the external mechanical components for the gate drive. The fixation and load-bearing of the gate drive board are not provided by the turn-off thyristor case 11, and the gate drive board and the turn-off thyristor case do not need to be in the same place. the same level. During installation and disassembly, the flexible structure can be used for easy bending to change the orientation and position of the gate drive, which greatly facilitates operation and greatly improves adaptability and flexibility.

There are two strong electric potentials that need to be connected between the auxiliary interface board 12 and the gate driver board 13, namely the gate (G) and the emitter (E), and the typical electrical parameters are the continuous current capacity of several tens of amperes. , the microsecond instantaneous current capacity is thousands of amperes, and the insulation withstand voltage is tens of volts. In order to achieve low parasitic impedance at the connection, the distance between the gate and emitter conductors of the flexible part should be as small as possible, and the conductor cross-sectional area should be as large as possible. There is no obvious current convergence between the auxiliary interface 12 , the gate driver board 13 and the flexible connection part (different from the connection methods such as wires and cables), so the parasitic inductance can be lower than tens to hundreds of pH.

Please refer to FIG. 9 , which is a schematic structural diagram of a fifth embodiment. As shown in FIG. 9 , the auxiliary interface board 12 includes a first part 121 and a second part 122 , and a second connection hole K3 is respectively opened on the overlapping part of the first part 121 and the gate driving board 13 . The flexible connection structure includes: a flexible printed board 151, a screw 152 and a nut 153; the flexible printed board 151 connects the first part 121 and the second part 122; one end of the screw 152 passes through the second connecting hole After K3, it is connected with the nut 153.

Specifically, the flexible printed board (FPC) includes two layers of copper layers, which are the gate electrode and the emitter potential respectively; the first part 121, the second part 122 and the connecting part of the flexible board meet the current requirements through dense vias, At the same time, lower parasitic impedance is achieved. The connection between the flexible printed board and the gate driver board 13 can be in many ways, which are not limited to screw fixation, fastener fixation, special interface fixation, and the like.

Please refer to FIG. 10 , which is a schematic structural diagram of a sixth embodiment. The turn-off thyristor device shown in FIG. 10 is substantially the same as the turn-off thyristor device shown in FIG. 9 , so the same parts will not be repeated here, and the different parts will now be described as follows. As shown in FIG. 10, in this embodiment, the auxiliary interface board 12 includes a first part 121 and a second part 122, and the flexible connection structure 15 includes: an upper fastener 154, a lower fastener 155, a flexible printing The upper fastener 154 is arranged above the gate driver board 13 and the auxiliary interface board 12; the lower fastener 155 is arranged on the gate driver board 13 and the auxiliary interface board 12. Below the interface board 12 ; the flexible printed board 151 connects the first part 121 and the second part 122 ; the fixing member 156 connects the upper fastener 154 and the lower fastener 155 .

It should be noted that in the present invention, although the above fasteners 143 are provided above the gate driving board 13 and the lower fasteners 144 are provided below the first part of the auxiliary interface board 12 as an example, the present invention Not limited to this, in practice, as long as the first part and the gate driving board 13 are located between the upper fastener and the lower fastener, for example, the upper fastener 143 can also be arranged on the first part. Above, the lower fastener 144 is disposed below the gate driving board 13 .

Please refer to FIG. 11 , which is a schematic structural diagram of a seventh embodiment. The turn-off thyristor device shown in FIG. 11 is substantially the same as the turn-off thyristor device shown in FIG. 10 , so the same parts will not be repeated here, and the different parts will now be described as follows. In this embodiment, the flexible connection structure 15 includes: a flexible printed board pressing interface 157, a pressing device 158 and a flexible printed board 151; the flexible printed board pressing interface 157 is disposed on the gate drive board 13 and electrically connected to the gate drive board 13; the pressing device 158 is arranged on the pressing interface 157 of the flexible printed board; one end of the flexible printed board is connected to the auxiliary interface board 12, through the The pressing device 151 presses the other end of the flexible printed board 151 on the gate driver board 13 , wherein the flexible printed board pressing interface 157 has pins 1571 to realize the connection with the gate driver board 13 electrical connection.

Specifically, in this embodiment, a special interface is used to fix a customized double-sided flexible printed board pressing interface, the pins are welded on the gate drive PCB, the flexible printed board is inserted into the interface, and the interface passes through the interface. The pressing device clamps the flexible printed board, and the upper and lower surfaces realize the flow through of the gate electrode and the emitter electrode respectively. Among them, the number and size of the special interface can be adjusted according to the actual application, and it is convenient to operate on the premise of providing sufficient pressure.

Please refer to FIG. 12 , which is a schematic structural diagram of an eighth embodiment. As shown in FIG. 12 , in this embodiment, the flexible connection structure 15 includes: a composite row 159 ; one end of the composite row 159 is connected to the gate driving board 13 through a fixing member 160 , and the other end of the composite row 159 is connected to the gate driving board 13 . One end is connected to the auxiliary interface board 12 through the fixing member 160 . Use a double-layer ultra-thin composite row with a width close to the driver board to connect the two PCBs. One end of the auxiliary interface board 12 is processed with an interface connected to the composite row 159 (welded or screwed). Once the composite row 159 is fixed to this board, it will not be disassembled. One end of the gate drive board 13 is processed with an interface connected to the composite row 159, which is not limited to screw fixing, fastener fixing, etc., which are similar to those described in the foregoing embodiments, and will not be repeated here. Wherein, in this embodiment, the composite row is a double-layer ultra-thin composite row, but the present invention is not limited to this.

To sum up, the present invention has the following advantages:

1. It is suitable for all kinds of occasions where it is necessary to replace and maintain the gate driver of the thyristor device that can be turned off, and the device is difficult to disassemble, which can greatly facilitate the work of designers and maintainers; and can only be replaced for the driver; device utilization.

2. Provide a variety of device structure design methods for gate drive separation, each with its own outstanding advantages, namely: rigid contact connection method has high reliability, low parasitic parameters, and can maximize the maintenance of the original electrical characteristics of gate drive; flexibility; The design of the external components of the connection method is flexible, and the disassembly operation is more convenient.

Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some of the technical features; and these Modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (14)

1. A shut-off thyristor device with separate gate drive is characterized in that, comprising: The turn-off thyristor case and the auxiliary interface board are connected by a low-inductance integrated connection method between the turn-off thyristor case and the auxiliary interface board; wherein, one end of the auxiliary interface board is specially processed for connection Interface; Gate driver board, including driver circuit module; A connection structure, through which the auxiliary interface board and the gate drive board are detachably connected, so as to realize the separation or combination between the turn-off thyristor case and the gate drive board. 2 . The thyristor device as claimed in claim 1 , wherein the connection structure is a rigid connection structure. 3 . 3. The turn-off thyristor device according to claim 2, wherein a first connection hole is respectively opened on the overlapping portion of the auxiliary interface board and the gate driver board, and the rigid connection structure comprises: A screw and a nut, one end of the screw is connected with the nut after passing through the first connection hole. 4. The turn-off thyristor device of claim 2, wherein the rigid connection structure comprises: an upper fastener, arranged above the gate drive plate; a lower fastener, arranged below the auxiliary interface board; Two fixing pieces are connected to the upper fastener and the lower fastener. 5 . The thyristor device as claimed in claim 4 , wherein the auxiliary interface and the gate drive plate are respectively provided with at least one first positioning hole, and the upper fastener and /or the lower fastener is further provided with at least one positioning portion, the positioning portion correspondingly penetrates the first positioning hole. 6 . The shut-off thyristor device according to claim 4 or 5 , wherein the fixing member is a bolt, and one of the two bolts is connected to the upper fastener and the lower fastener. 7 . One end of the component, and the other of the two bolts is connected to the other ends of the upper fastener and the lower fastener. 7 . The thyristor device as claimed in claim 4 , wherein the fixing member is a buckle, and one of the two buckles is connected to the upper fastener and the lower buckle. 8 . One end of the fastener, and the other of the two hasps is connected to the other ends of the upper fastener and the lower fastener. 8. The thyristor device according to claim 4 or 5, wherein the fixing member is an eccentric, and one of the two eccentrics is connected to the upper fastener and the lower One end of the fastener, and the other of the two eccentrics is connected to the other ends of the upper fastener and the lower fastener. 9 . The thyristor device of claim 1 , wherein the connection structure is a flexible connection structure. 10 . 10 . The thyristor device as claimed in claim 9 , wherein the auxiliary interface board comprises a first part and a second part, and the overlapping parts of the first part and the gate driving board are respectively provided with thyristors. 11 . The second connection hole, the flexible connection structure includes: a flexible printed board, connecting the first part and the second part; A screw and a nut, one end of the screw is connected with the nut after passing through the second connection hole. 11. The thyristor device as claimed in claim 9, wherein the auxiliary interface board comprises a first part and a second part, and the flexible connection structure comprises: an upper fastener, arranged above the gate drive plate; a lower fastener, arranged below the auxiliary interface board; a flexible printed board, connecting the first part and the second part; The fixing piece is connected to the upper fastener and the lower fastener. 12. The turn-off thyristor device of claim 9, wherein the flexible connection structure comprises: a flexible printed board pressing interface, disposed on the gate driver board and electrically connected to the gate driver board; The pressing device is arranged on the pressing interface of the flexible printed board; A flexible printed board, one end of which is connected to the auxiliary interface board, the other end of the flexible printed board is pressed on the gate driving board by the pressing device, and the flexible printed board is connected to the The auxiliary interface board and the gate drive board are electrically connected with low impedance. 13. The turn-off thyristor device of claim 9, wherein the flexible connection structure comprises: One end of the composite row is connected to the gate driving board, and the other end of the composite row is connected to the auxiliary interface board. 14. The turn-off thyristor device according to claim 1, wherein the auxiliary interface board and the gate driver board are both multi-layer PCB boards, and the auxiliary interface board and the gate driver board are The copper-laying structure is as follows: the gate electrode and the emitter potential are distributed alternately, and the through-flow is realized by contacting the corresponding exposed metal areas with each other, and a plurality of via holes are arranged near the copper-laying area between each layer.

Images