CN111464164B - Three-column compression joint cascade trigger switch and compression joint main body structure thereof - Google Patents
Three-column compression joint cascade trigger switch and compression joint main body structure thereof Download PDFInfo
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- CN111464164B CN111464164B CN202010254637.9A CN202010254637A CN111464164B CN 111464164 B CN111464164 B CN 111464164B CN 202010254637 A CN202010254637 A CN 202010254637A CN 111464164 B CN111464164 B CN 111464164B
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
Abstract
The invention provides a three-column compression joint type cascade trigger switch and a compression joint main structure thereof, wherein IGCT devices of a plurality of three-column bridge circuit assemblies are stacked to form a first column body of a multi-column compression joint type bridge circuit cascade module, and a first insulating block is arranged between the first column bodies to be separated; the first diode assemblies of the three-column bridge circuit assemblies are stacked to form a second column of the multi-column compression joint bridge circuit cascade module, and the second columns are communicated with each other through copper bar contact; the second diode assemblies of the three-column bridge circuit assemblies are stacked to form a third column of the multi-column compression joint bridge circuit cascade module, and the third column are in circuit communication through copper bar contact; placing an aluminum block to compensate the height difference between the second column and the third column; the positions of the first cylinder, the second cylinder and the third cylinder are controlled by the positioning pins so as to ensure the crimping areas of the first cylinder, the second cylinder and the third cylinder; the first column body, the second column body and the third column body are distributed in an equilateral triangle shape to form a bridge circuit crimping assembly unit.
Description
Technical Field
The invention relates to the technical field of semiconductor switches, in particular to a three-column compression joint cascade trigger switch and a compression joint main body structure thereof.
Background
The multi-terminal direct current transmission and direct current power grid technology based on flexible direct current is an effective technical means for solving the problems of grid connection and consumption of new energy in China, a high-voltage direct current breaker is one of core equipment for constructing a direct current power grid, and at present, the topology of the high-voltage direct current breaker mainly comprises an IGBT (Insulated Gate Bipolar Transistor) module with a forward and reverse series structure and an IGBT module with a single-stage H-bridge structure which are connected in series, and a high-voltage quick mechanical switch is arranged outside the high-voltage direct current breaker. Because the direct current breaker can produce very high direct current transient voltage at both ends of the breaker when breaking the direct current, many IGBT modules are required to be connected in series in a transfer branch of the direct current breaker, and meanwhile, a quick mechanical switch is required to bear very high turn-off voltage, so that the direct current breaker is huge in size and high in manufacturing cost, and meanwhile, the quick mechanical switch is very high in requirement and very difficult to design.
The valve module of the high-voltage direct-current breaker in the prior art has the advantages that the cascade quantity is increased along with the improvement of the voltage and break-off current requirements, the cost is high sharply, the connection is complex, and the volume is large. In addition, during the working process of the direct current breaker, the semiconductor switch assembly is responsible for the tasks of switching on and switching off fault current, in the transfer branch assembly, when the high-voltage direct current breaker acts, the semiconductor switch in the transfer branch assembly is required to rapidly and reliably switch off larger fault current within a specified time, and a great current change rate can be generated during the switching off process, so that the smaller the stray inductance in the transfer branch assembly is required to be, the better the electromagnetic interference generated by transient current is required to be fully considered in the design process of the transfer branch assembly. The semiconductor switch is a core component of the circuit breaker, so that the semiconductor switch with small space volume, high reliability, good compactness, low inductance value and strong anti-interference capability is very necessary to design.
Disclosure of Invention
The invention aims to provide a three-column compression joint type cascade trigger switch and a compression joint main structure thereof, which are used for solving the problems that the existing single-column compression joint and multi-column parallel compression joint modes can not realize a complex circuit and a cascade multi-unit circuit on the basis of one frame, and have larger volume and complex structure.
In order to solve the technical problems, the invention provides a multi-column crimping bridge circuit cascade module, which comprises a plurality of three-column bridge circuit components which are sequentially stacked;
each three-post bridge circuit assembly comprises an IGCT device, the IGCT devices of a plurality of the three-post bridge circuit assemblies are stacked to form a first post of the multi-post crimping bridge circuit cascade module, and a first insulating block is arranged between the IGCT devices to be separated;
each three-column bridge circuit assembly comprises a first diode assembly, the first diode assemblies of a plurality of three-column bridge circuit assemblies are stacked to form a second column of the multi-column compression-joint bridge circuit cascade module, and the first diode assemblies are in circuit communication through copper bar contact;
each three-column bridge circuit assembly comprises a second diode assembly, the second diode assemblies of a plurality of three-column bridge circuit assemblies are stacked to form a third column of the multi-column compression-joint bridge circuit cascade module, and the second diode assemblies are in circuit communication through copper bar contact;
an aluminum block is placed in the second column or the third column to compensate the height difference between the second column and the third column;
the first cylinder, the second cylinder and the third cylinder are controlled to be in respective positions through positioning pins so as to ensure the crimping areas of the first cylinder, the second cylinder and the third cylinder;
the first column body, the second column body and the third column body are distributed in an equilateral triangle shape, so that a bridge circuit crimping assembly unit is formed.
Optionally, in the multi-column crimp bridge circuit cascade module, the bridge circuit crimp assembly unit further includes an in-bridge buffer resistor-capacitor, an out-bridge buffer resistor-capacitor and a voltage-equalizing resistor, where the in-bridge buffer resistor-capacitor, the out-bridge buffer resistor-capacitor and the voltage-equalizing resistor are respectively hung on three sides of the equilateral triangle and fixedly installed.
Optionally, in the multi-post crimp bridge circuit cascade module, in each bridge circuit crimp assembly unit, the first diode assembly includes two fast recovery diodes with positive poles opposite, the second diode assembly includes two fast recovery diodes with negative poles opposite, or,
the first diode component comprises two fast recovery diodes with opposite cathodes, and the second diode component comprises two fast recovery diodes with opposite anodes;
the positive and negative pole positions of the fast recovery diodes in adjacent first diode assemblies are opposite.
The invention also provides a three-column crimping type cascade trigger switch crimping main structure comprising the multi-column crimping type bridge circuit cascade module, the three-column crimping type cascade trigger switch crimping main structure further comprises a crimping frame, wherein:
the crimping frame comprises an upper pressing plate, a lower pressing plate and a plurality of insulating pull rods, wherein the insulating pull rods are uniformly and vertically arranged between the upper pressing plate and the lower pressing plate and are perpendicular to the upper pressing plate and the lower pressing plate, one end of each insulating pull rod is fixed with the edge of the upper pressing plate, and the other end of each insulating pull rod is fixed with the edge of the lower pressing plate.
Optionally, in the crimping main structure of the three-column crimping cascade trigger switch, two ends of the insulation pull rod are bonded with metal inserts to improve mechanical strength, and two ends of the insulation pull rod are bonded with the metal inserts to form a boss to limit the upper pressing plate and the lower pressing plate.
Optionally, in the three-column crimping type cascade trigger switch crimping main structure, the three-column crimping type cascade trigger switch crimping main structure further includes a plurality of disc spring components, wherein:
each disc spring assembly comprises a plurality of disc springs, a spherical ejector rod, a pressing block, a cylinder supporting piece and a cylinder locking nut, wherein the disc springs are sleeved on the outer side of the cylinder supporting piece, the cylinder locking nut is in clearance fit with the inner wall of the cylinder supporting piece and is connected with the spherical ejector rod through threads, and the spherical ejector rod is in spherical contact with the pressing block;
during crimping, the cylinder support is in threaded connection with a pressurized oil cylinder of the installation equipment, the disc spring is compressed and deformed by the upper pressing plate of the crimping frame and the bottom flange of the cylinder support, so that a gap is exposed between the bottom flange of the cylinder lock nut and the bottom flange of the cylinder support, and the cylinder lock nut is screwed upwards through threads of the spherical ejector rod.
The invention also provides a three-column crimping type cascade trigger switch comprising the crimping main body structure, and the three-column crimping type cascade trigger switch further comprises a valve power box module, wherein:
the valve power supply box module is characterized in that the valve power supply box module is an independent detachable module formed by an upper connecting plate, a lower connecting plate and a plurality of insulating beams, a plurality of power supply units are accommodated in the valve power supply box module, 4 insulating beams, the upper connecting plate and the lower connecting plate are installed into an integral frame through screws, and a left sliding plate and a right sliding plate are installed on two sides to fix the power supply units.
Optionally, in the three-column crimping type cascade trigger switch, each power supply unit corresponds to the corresponding bridge circuit crimping assembly unit one by one, each power supply unit comprises a power supply PCB board, a power supply box cover and a valve isolation transformer, and the power supply PCB board and the valve isolation transformer are connected with the corresponding bridge circuit crimping assembly unit into a whole;
the power supply PCB and the valve isolation transformer are connected into a whole through a supporting plate, and the power supply box cover is arranged above the power supply PCB for protection;
sequentially mounting a plurality of power supply units at corresponding positions on the integral frame;
the left sliding plate and the right sliding plate limit the power supply unit.
Optionally, in the three-column crimping type cascade trigger switch, the three-column crimping type cascade trigger switch further comprises a valve energy supply transformer, a lightning arrester, an upper shielding shell and a lower shielding shell, wherein:
the upper shielding shell and the lower shielding shell are used for accommodating the crimping main structure, the valve power supply box module, the valve energy supply transformer and the lightning arrester.
Optionally, in the three-column press-connection cascade trigger switch, the upper shielding shell and the lower shielding shell are metal sheet metal parts, and the parts are in target shapes through pressing edges, die stamping and welding polishing processes, so that outer corners of the parts are arc-shaped to prevent electromagnetic interference caused by sharp corner discharge, and the minimum arc radius is 3mm.
In the three-column crimping cascade trigger switch and the crimping main structure thereof provided by the invention, the first column body, the second column body and the third column body are respectively controlled by the positioning pins to ensure the crimping areas of the first column body, the second column body and the third column body, and the first column body, the second column body and the third column body are distributed in an equilateral triangle manner to form a bridge circuit crimping assembly unit, so that the trigger switch module based on a gate commutated thyristor (The Integrated Gate Commutated Thyristor, IGCT) and a crimping diode is provided, is suitable for a flexible direct current breaker, and solves the problems of increased cascading quantity, complex connection, large volume and the like of required devices for higher-level control voltage and switching-on current.
Further, the upper pressing plate and the lower pressing plate adopt steel plates with the thickness of 30mm, so that the influence of self stress deformation on the whole structure is in a controllable range when the compression joint main body structure is subjected to 40kN force for a long time. The insulating pull rod ensures the potential difference between the upper pressing plate and the lower pressing plate in the crimping frame, so that the upper pressing plate is consistent with the six potential of the bridge circuit unit, the lower pressing plate is consistent with the one potential of the bridge circuit unit, the insulating distance between the conductor in the bridge circuit and the upper pressing plate and the lower pressing plate is saved, and the overall size of the trigger switch is greatly reduced. And the two ends of the insulating pull rod are bonded with metal inserts, so that the strength of the fixed position of the insulating part is greatly increased, the upper pressing plate and the lower pressing plate are limited through the convex tables of the metal inserts at the two ends, and the spacing size of the upper pressing plate and the lower pressing plate in the integral frame is ensured. And the height error of the insulating pull rod is adjusted through a copper foil gasket with the thickness of 0.2 mm.
In addition, the valve power supply box module is used as a single module, can be parallel to the crimping main body structure, and shortens the whole manufacturing period of the trigger switch; the upper shielding shell and the lower shielding shell are metal sheet metal parts, and the target shape of the parts is achieved through the processes of pressing the edges, stamping by a die and welding and polishing, so that the whole parts have no sharp edges and edges. The upper shielding shell and the lower shielding shell are used for well connecting the press-fit main body structure and the valve power supply box module into a whole, the valve energy supply in the whole loop is changed, the lightning arrester device is also arranged on the upper shielding shell and the lower shielding shell, all parts in the multi-column press-fit cascade trigger switch are included in the range of the multi-column press-fit cascade trigger switch, and the electric reliability of the whole structure is ensured through the smooth outer contour of the part.
Drawings
FIG. 1 is a schematic diagram of a prior art single-column crimped cascade trigger switch;
FIGS. 2-8 are schematic diagrams of a three-column crimping cascade trigger switch according to an embodiment of the invention;
the figure shows: 1-crimping a body structure; 10-three column bridge circuit assembly; 11-IGCT devices; 12-a first diode assembly; 13-a second diode assembly; 14-in-bridge buffer resistance-capacitance; 15-buffering resistance-capacitance outside the bridge; 161-soft connection copper bars; 162-bending copper bars; 17-locating pins; 20-a first column; 30-a second column; 50-crimping the frame; 51 upper platen; 52-a lower pressing plate; 53-a plurality of insulating tie rods; 60-disc spring assembly; 61-disc springs; 62-spherical ejector pins; 63 briquetting; 64-cylinder support; a 65 barrel lock nut; 70-valve power box module; 71-an upper connecting plate; 72-a lower connecting plate; 73-insulating beams; a 74-power supply unit; 75-power box cover; 76-valve isolation transformer; 80-an upper shield shell; 81-a lower shield shell; 82-valve energizing transformer; 83-lightning arrester.
Detailed Description
The three-column compression type cascade trigger switch and the compression main body structure thereof provided by the invention are further described in detail below with reference to the accompanying drawings and specific embodiments. Advantages and features of the invention will become more apparent from the following description and from the claims. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention.
As shown in fig. 1, a diode bridge low-inductance module for a circuit breaker in the prior art includes an IEGT press-fit structure, a diode press-fit structure, a damping capacitor, a damping resistor, and a connection busbar assembly. The IEGT press-fitting structure is in press-fitting with 2 parallel IEGTs at a time, wherein the 2 parallel IEGTs are respectively No. 1 IEGT and No. 2 IEGT; the C electrode of the No. 1 IEGT and the C electrode of the No. 2 IEGT are connected through an IEGT shared C electrode conductive plate; the E pole of the No. 1 IEGT is connected with the E pole of the No. 2 IEGT through an E pole arched connecting row; the diode press-fitting structure is pressed with 4 diodes at a time, wherein the 4 diodes are respectively a D1 diode, a D2 diode, a D3 diode and a D4 diode; wherein the D1 diode and the D2 diode form a group, and the D3 diode and the D4 diode form a group of two diodes; two diodes in the same group are arranged in the same direction; the diode cathodes in the different groups are opposite; the two groups of diodes are distributed in a mirror image mode; the cathode of the D1 diode and the cathode of the D3 diode are connected through a diode common cathode conducting plate; the connecting busbar group comprises a connecting busbar 1, a connecting busbar 2 and a connecting busbar 3; the E pole of the No. 1 IEGT is connected with the anode of the D2 diode through the No. 1 connecting busbar; the E pole of the No. 2 IEGT is connected with the anode of the D4 diode through the No. 2 connecting busbar; the IEGT common C electrode conductive plate is connected with the diode common cathode conductive plate through the No. 3 connecting busbar; one end of the damping capacitor is connected with the No. 3 connecting busbar, and the other end of the damping capacitor is connected with the No. 1 connecting busbar; the damping resistor is connected with the damping capacitor in parallel.
The invention provides a three-column compression joint type cascade trigger switch and a compression joint main structure thereof, which aim to solve the problems that the existing single-column compression joint and multi-column parallel compression joint modes can not realize a complex circuit and a cascade multi-unit circuit on the basis of one frame, and have larger volume and complex structure.
In order to realize the above thought, the invention provides a three-column compression joint type cascade trigger switch and a compression joint main structure thereof, wherein the multi-column compression joint type bridge circuit cascade module comprises a plurality of three-column bridge circuit components which are sequentially stacked; each three-post bridge circuit assembly comprises an IGCT device, the IGCT devices of a plurality of the three-post bridge circuit assemblies are stacked to form a first post of the multi-post crimping bridge circuit cascade module, and a first insulating block is arranged between the IGCT devices to be separated; each three-column bridge circuit assembly comprises a first diode assembly, the first diode assemblies of a plurality of three-column bridge circuit assemblies are stacked to form a second column of the multi-column compression-joint bridge circuit cascade module, and the first diode assemblies are in circuit communication through copper bar contact; each three-column bridge circuit assembly comprises a second diode assembly, the second diode assemblies of a plurality of three-column bridge circuit assemblies are stacked to form a third column of the multi-column compression-joint bridge circuit cascade module, and the second diode assemblies are in circuit communication through copper bar contact; an aluminum block is placed in the second column or the third column to compensate the height difference between the second column and the third column; the first cylinder, the second cylinder and the third cylinder are controlled to be in respective positions through positioning pins so as to ensure the crimping areas of the first cylinder, the second cylinder and the third cylinder; the first column body, the second column body and the third column body are distributed in an equilateral triangle shape, so that a bridge circuit crimping assembly unit is formed.
Example 1
The present embodiment provides a three-pole crimp-type cascade trigger switch for a circuit breaker and a crimp-type main structure thereof, as shown in fig. 8, which includes a crimp-type main structure 1, a valve power box module 70, a valve power supply transformer 82, a lightning arrester 83, and an upper shield case 80, a lower shield case 81, and the like.
As shown in fig. 6, the press-fit main structure 1 includes a multi-post press-fit bridge circuit cascade module (including a first post 20, a second post 30, and a third post), i.e., 6 bridge circuit press-fit assembly units (including a three-post bridge circuit assembly 10 and additional assemblies thereof), a press-fit frame 50, and 3 disc spring assemblies 60. The circuit main body is formed by connecting 6 three-column bridge circuit assemblies 10 based on IGCT in series, and each three-column bridge circuit assembly 10 is regarded as a minimum unit, and the structure is attached as a bridge circuit crimping assembly unit. The bridge circuit crimping assembly unit comprises a three-column bridge circuit assembly 10, an in-bridge buffer resistance-capacitance 14, an out-bridge buffer resistance-capacitance 15 and a voltage equalizing resistor. As shown in fig. 2-3, the three-pillar bridge circuit assembly 10 includes four fast recovery diodes, an IGCT power device 11, flexible copper bars 161, and aluminum and insulating block components. The four diodes are arranged in pairs (and are divided into a first diode component 12 and a second diode component 13) and distributed with the IGCT device 11 in a three-column equilateral triangle, if the anodes of one group of diodes are opposite, the cathodes of the other group of diodes are opposite, and the positive and negative positions of the fast recovery diodes in the adjacent first diode components are opposite; and soft connection copper bars 161 are arranged between each two groups of diodes and are respectively connected with two poles of the IGCT assembly 11, and the upper ends and the lower ends of the two groups of diodes are also connected with each other through the soft connection copper bars 161, so that the three-column bridge circuit assembly 10 is communicated. The inner bridge buffer resistor-capacitor 14 and the outer bridge buffer resistor-capacitor 15 are respectively arranged at the two sides and the front of the three-column bridge circuit assembly 10 in a mode of externally connecting bent copper bars 162 through screw fixation. The equalizing resistor is provided with a radiator due to larger heating value, is fixed on two sides of the door driving position of the IGCT device 11 through an insulating pull rod 53, and is connected with a connecting wire to complete circuit connection.
The multi-column compression joint bridge circuit cascade module is characterized in that 6 bridge circuit compression joint assembly units are sequentially stacked, insulation blocks are placed between each two unit IGCT devices 11 to be separated, copper bar contacts are arranged between each two unit diodes to ensure circuit communication, and aluminum blocks are placed at proper positions in the two column diode devices to make up for height difference. And the positions of the three column devices are controlled by the positioning pins 17, so that the required crimping area of each column device is ensured.
As shown in fig. 4, the press frame 50 includes an upper press plate 51, a lower press plate 52, and an insulating pull rod 53. The upper pressing plate 51 and the lower pressing plate 52 are made of steel plates with the thickness of 30mm, so that the influence of self-stressed deformation on the whole structure is ensured to be in a controllable range when the compression joint main structure is subjected to 40kN force for a long time. The insulating pull rod 53 ensures the potential difference between the upper pressing plate 51 and the lower pressing plate 52 in the crimping frame, so that the upper pressing plate 51 is consistent with the potential of the three-column bridge circuit assembly 10 at the top end, the lower pressing plate 52 is consistent with the potential of the three-column bridge circuit assembly 10 at the bottom end, the insulating distance between a conductor in a bridge circuit and the upper pressing plate and the lower pressing plate is omitted, and the overall size of the trigger switch is greatly reduced. And the two ends of the insulating pull rod are bonded with metal inserts, so that the strength of the fixed position of the insulating part is greatly increased, the upper pressing plate and the lower pressing plate are limited through the convex tables of the metal inserts at the two ends, and the spacing size of the upper pressing plate and the lower pressing plate in the integral frame is ensured. And the height error of the insulating pull rod is adjusted through a copper foil gasket with the thickness of 0.2 mm.
As shown in fig. 5, each set of disc spring assemblies 60 includes 6 disc springs 61, a spherical push rod 62 and a press block 63, a cylindrical support 64 and a cylindrical lock nut 65. The disc spring 61 is sleeved outside the cylinder supporting piece 64, and the cylinder locking nut 65 is in clearance fit with the inner wall of the cylinder supporting piece 64 and is in spherical contact with the spherical ejector rod 62 and the pressing block 63 through threaded connection. The cylinder support 64 is in threaded connection with the pressurized oil cylinder of the installation device during crimping, the disc spring 61 is compressed and deformed by the upper pressing plate 51 of the crimping frame and the bottom flange of the cylinder support 64, so that a gap is exposed between the bottom flange of the cylinder lock nut 65 and the bottom flange of the cylinder support 64, and at the moment, the cylinder lock nut 65 is screwed upwards through the ejector rod threads, so that the compression state of the disc spring 61 is still maintained after the oil cylinder is removed, and a long-term compression force is provided.
As shown in fig. 7, the valve power box module 70 is a module which is formed by corresponding power supply units of the bridge circuit crimping assembly units and can be detached independently, and is convenient to install and maintain. First, 4 insulating beams 73, an upper connection plate 71, and a lower connection plate 72 are mounted as a single frame by screws, and left and right slide plates are mounted on both sides for fixing the power supply unit 74. The power supply unit 74 is formed by connecting a power supply PCB corresponding to each three-column bridge circuit assembly 10 and a valve isolation transformer 76 into a whole through a supporting plate, and a power supply box cover 75 is arranged above the PCB for protection. The 6 power supply units 74 are then sequentially attached to the corresponding locations on the frame. Wherein the PCB board is integrated with the valve isolation transformer 76 as a whole, which greatly reduces the amount of installation work in the frame. In addition, the left and right sliding plates limit the power supply unit 74 through the structure of the left and right sliding plates, and the left and right sliding plates are fixed through only two screws on the front side, so that the assembly difficulty is reduced. The valve power box module 70 can be used as a single module and can be performed in parallel with the crimping main structure 1, so that the whole manufacturing period of the trigger switch is shortened.
The upper shielding shell 80 and the lower shielding shell 81 are metal sheet metal parts, and the target shape of the parts is achieved through various processes such as pressing edges, die stamping, welding and polishing, so that the whole parts are free of sharp edges and edges, the minimum arc radius is not smaller than 3mm, and the electromagnetic interference caused by sharp corner discharge is prevented. The upper and lower shielding shells 81 connect the press-fit main body structure 1 and the valve power box module 70 into a whole, and enable the valve energy supply transformer and the lightning arrester device in the whole loop to be mounted on the press-fit main body structure, each component in the multi-column compression-joint cascade trigger switch is included in the range of the multi-column compression-joint cascade trigger switch, and the electric reliability of the whole structure is ensured through the smooth outer contour of the component.
The invention integrates six serially connected bridge circuits based on IGCT and diode, a power box, an isolation transformer, an energy supply transformer, a current transformer and other devices into one 1380x350x700 (mm) range module, and has the advantages of better integrity, attractive appearance, compact structure and smaller size. And under the condition, a plurality of switch modules can be cascaded, so that the requirement of switching off larger fault current is met.
Specifically, the bridge circuit crimping assembly unit comprises a three-column bridge circuit assembly, an in-bridge buffer resistance-capacitance, an out-bridge buffer resistance-capacitance and a voltage equalizing resistor. The three-column bridge circuit assembly comprises four fast recovery diodes, an IGCT power device, a flexible connection copper bar, an aluminum block and an insulating block part. The four diodes are arranged in pairs and distributed with the IGCT device in a three-column equilateral triangle, wherein the anodes of one group of diodes are opposite, and the cathodes of the other group of diodes are opposite, and are communicated with each other and the IGCT device through soft connection copper bars. In addition, the heights of the upper end surfaces and the lower end surfaces of the three columns are adjusted by additionally installing aluminum blocks and insulating block parts, so that the end surfaces of the three columns of bridge circuit components are in contact to realize series connection. The internal buffer resistance-capacitance, the external buffer resistance-capacitance and the equalizing resistance are externally hung on each side face of the three-column bridge circuit component.
The multi-column crimping bridge circuit cascade module comprises: at least two bridge circuits are crimped to the assembly unit. The crimping main body structure of the multi-column crimping cascade trigger switch is formed by the crimping main body structure, the crimping main body structure and the disc spring component. The crimping frame comprises an upper pressing plate, a lower pressing plate and an insulating pull rod, wherein the upper pressing plate and the lower pressing plate are aligned, and the crimping frame is formed by limiting the insulating pull rod and limiting the space height and then fixing. The disc spring assembly comprises a plurality of disc springs, a spherical ejector rod, a pressing block, a cylinder supporting piece and a cylinder locking nut. The disc spring is sleeved on the outer side of the cylinder supporting piece, and the cylinder lock nut is in clearance fit with the inner wall of the cylinder supporting piece and is in spherical contact with the spherical ejector rod and the pressing block through threaded connection. When in compression joint, the cylinder support piece is in threaded connection with the oil cylinder, the disc spring is compressed and deformed by the upper pressing plate of the compression joint frame and the flange at the bottom of the cylinder support piece, so that the flange at the bottom of the cylinder lock nut and the flange at the bottom of the cylinder support piece are exposed out of a gap, at the moment, the cylinder lock nut is screwed up through the ejector rod threads, and the compression state of the disc spring is still maintained after the oil cylinder is removed, so that long-term compression force is provided. The positioning holes of the bridge circuit crimping assembly units are overlapped in the crimping frame after being matched with the positioning holes of the crimping frame to limit the positions through positioning pins, and the long-term 40kN pressing force is provided through the disc spring assembly above.
Further, the multi-column crimping cascade trigger switch comprises: a multi-column compression joint bridge circuit cascade module, a valve power box module, a valve energy supply transformer and an upper shielding shell and a lower shielding shell. Wherein: the valve power supply box module comprises power supply units corresponding to the bridge circuit crimping assembly units, and each power supply unit comprises a valve power supply box and a valve isolation transformer of the bridge circuit of the unit and is connected into a whole. Each power supply unit forms a module which is convenient to install and overhaul and can be independently disassembled and assembled through the upper connecting plate and the lower connecting plate and the insulating beam. The upper and lower shielding shells enable all parts in the multi-column compression joint type cascade trigger switch to be included in the range of the multi-column compression joint type cascade trigger switch, and the electric reliability of the whole structure of the multi-column compression joint type cascade trigger switch is guaranteed through the smooth outer contour of the part.
In summary, the above embodiments describe different configurations of the three-pole crimping type cascade trigger switch in detail, and of course, the present invention includes, but is not limited to, the configurations listed in the above embodiments, and any contents that are transformed based on the configurations provided in the above embodiments fall within the scope of the present invention. One skilled in the art can recognize that the above embodiments are illustrative.
The above description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.
Claims (10)
1. The multi-column crimping bridge circuit cascade module is characterized by comprising a plurality of three-column bridge circuit components which are sequentially stacked;
each three-post bridge circuit assembly comprises an IGCT device, the IGCT devices of a plurality of the three-post bridge circuit assemblies are stacked to form a first post of the multi-post crimping bridge circuit cascade module, and a first insulating block is arranged between the IGCT devices to be separated;
each three-column bridge circuit assembly comprises a first diode assembly, the first diode assemblies of a plurality of three-column bridge circuit assemblies are stacked to form a second column of the multi-column compression-joint bridge circuit cascade module, and the first diode assemblies are in circuit communication through copper bar contact;
each three-column bridge circuit assembly comprises a second diode assembly, the second diode assemblies of a plurality of three-column bridge circuit assemblies are stacked to form a third column of the multi-column compression-joint bridge circuit cascade module, and the second diode assemblies are in circuit communication through copper bar contact;
an aluminum block is placed in the second column or the third column to compensate the height difference between the second column and the third column;
the first cylinder, the second cylinder and the third cylinder are controlled to be in respective positions through positioning pins so as to ensure the crimping areas of the first cylinder, the second cylinder and the third cylinder;
the first column body, the second column body and the third column body are distributed in an equilateral triangle shape, so that a bridge circuit crimping assembly unit is formed.
2. The multi-post crimp bridge circuit cascade module of claim 1, wherein the bridge circuit crimp assembly unit further comprises an intra-bridge buffer resistor-capacitor, an extra-bridge buffer resistor-capacitor, and a voltage-equalizing resistor, wherein the intra-bridge buffer resistor-capacitor, the extra-bridge buffer resistor-capacitor, and the voltage-equalizing resistor are respectively externally hung on three sides of the equilateral triangle and fixedly mounted.
3. The multi-post compression bridge circuit cascode module according to claim 1, wherein in each of said bridge circuit compression assembly units, said first diode assembly comprises two positive opposing fast recovery diodes, said second diode assembly comprises two negative opposing fast recovery diodes, or,
the first diode component comprises two fast recovery diodes with opposite cathodes, and the second diode component comprises two fast recovery diodes with opposite anodes;
the positive and negative pole positions of the fast recovery diodes in adjacent first diode assemblies are opposite.
4. A three-post crimp type cascade trigger switch crimp body structure comprising the multi-post crimp type bridge circuit cascade module of claim 1, wherein the three-post crimp type cascade trigger switch crimp body structure further comprises a crimp frame, wherein:
the crimping frame comprises an upper pressing plate, a lower pressing plate and a plurality of insulating pull rods, wherein the insulating pull rods are uniformly and vertically arranged between the upper pressing plate and the lower pressing plate and are perpendicular to the upper pressing plate and the lower pressing plate, one end of each insulating pull rod is fixed with the edge of the upper pressing plate, and the other end of each insulating pull rod is fixed with the edge of the lower pressing plate.
5. The three-column crimping main structure of the cascade trigger switch as claimed in claim 4, wherein metal inserts are bonded at two ends of the insulation pull rod to improve mechanical strength, and bosses are formed by bonding the metal inserts at two ends to limit the upper and lower pressing plates.
6. The three-post crimp, tandem trigger switch crimp body structure of claim 4, further comprising a plurality of disc spring assemblies, wherein:
each disc spring assembly comprises a plurality of disc springs, a spherical ejector rod, a pressing block, a cylinder supporting piece and a cylinder locking nut, wherein the disc springs are sleeved on the outer side of the cylinder supporting piece, the cylinder locking nut is in clearance fit with the inner wall of the cylinder supporting piece and is connected with the spherical ejector rod through threads, and the spherical ejector rod is in spherical contact with the pressing block;
during crimping, the cylinder support is in threaded connection with a pressurized oil cylinder of the installation equipment, the disc spring is compressed and deformed by the upper pressing plate of the crimping frame and the bottom flange of the cylinder support, so that a gap is exposed between the bottom flange of the cylinder lock nut and the bottom flange of the cylinder support, and the cylinder lock nut is screwed upwards through threads of the spherical ejector rod.
7. A three-post crimp cascade trigger switch comprising the crimp body structure of claim 4, wherein the three-post crimp cascade trigger switch further comprises a valve power box module, wherein:
the valve power supply box module comprises an independently detachable module through an upper connecting plate, a lower connecting plate and a plurality of insulating beams, wherein a plurality of power supply units are accommodated in the valve power supply box module, 4 insulating beams, the upper connecting plate and the lower connecting plate are installed into a whole frame through screws, and a left sliding plate and a right sliding plate are installed on two sides to fix the power supply units.
8. The three-post crimp-type cascade trigger switch of claim 7, wherein each power supply unit corresponds to the three-post bridge circuit assembly one by one, each power supply unit comprises a power supply PCB board, a power supply box cover and a valve isolation transformer, and the power supply PCB board and the valve isolation transformer are connected with the corresponding three-post bridge circuit assembly into a whole;
the power supply PCB and the valve isolation transformer are connected into a whole through a supporting plate, and the power supply box cover is arranged above the power supply PCB for protection;
sequentially mounting a plurality of power supply units at corresponding positions on the integral frame;
the left sliding plate and the right sliding plate limit the power supply unit.
9. The three-post compression-type cascade trigger switch of claim 7, further comprising a valve-powered transformer, a lightning arrester, an upper shield housing, and a lower shield housing, wherein:
the upper shielding shell and the lower shielding shell are used for accommodating the crimping main structure, the valve power supply box module, the valve energy supply transformer and the lightning arrester.
10. The three-column crimping type cascade trigger switch according to claim 9, wherein the upper shielding shell and the lower shielding shell are metal sheet metal parts, the parts are in target shapes through a die stamping and welding polishing process, outer corners of the parts are arc-shaped to prevent electromagnetic interference caused by sharp corner discharge, and the minimum arc radius is 3mm.
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