CN222262469U - Switching network unit for nuclear fusion magnet power supply plasma breakdown - Google Patents
Switching network unit for nuclear fusion magnet power supply plasma breakdown Download PDFInfo
- Publication number
- CN222262469U CN222262469U CN202420952996.5U CN202420952996U CN222262469U CN 222262469 U CN222262469 U CN 222262469U CN 202420952996 U CN202420952996 U CN 202420952996U CN 222262469 U CN222262469 U CN 222262469U
- Authority
- CN
- China
- Prior art keywords
- power supply
- connection row
- connection bar
- network unit
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Power Conversion In General (AREA)
Abstract
The application provides a switching network unit for plasma breakdown of a nuclear fusion magnet power supply, which is connected in series between the power supply and a magnet load, and comprises an input connection row, an output connection row, a current limiting resistor and a current converting switch network, wherein the input connection row is arranged on a bottom plate and connected with the power supply, the output connection row is arranged on the bottom plate and connected with the magnet load, the input connection row and the output connection row are arranged on two sides of an insulating layer, projections of the input connection row and the output connection row on the insulating layer are overlapped, currents in the input connection row and the output connection row on two sides of the insulating layer are equal in size and opposite in direction, and the current limiting resistor is connected in series between the input connection row and the output connection row and connected in parallel with the current converting switch. The current flowing through the symmetrical parts on the two sides of the insulating layer is equal in size and opposite in direction so as to offset the magnetic field generated by the current, thereby effectively reducing stray inductance and improving the current sharing effect of each converter switch.
Description
Technical Field
The utility model relates to the technical field of electronic power, in particular to a switching network unit for plasma breakdown of a nuclear fusion magnet power supply.
Background
In a magneto-constrained nuclear fusion device, a magnet power supply is usually subjected to active breaking by a switching network to generate high voltage, so that plasma current is generated through high-voltage breakdown at the initial stage of discharge.
The core equipment of the switch network is a converter switch with full-control solid-state switch devices which are high in switching-on and switching-off speed, high in reliability, good in stability, long in service life and good in maintainability. However, in this application environment of a nuclear fusion plasma breakdown power supply, it is difficult for a general electrical switching network design to meet this particular operating condition.
Therefore, a need exists for a switching network element for plasma breakdown of a nuclear fusion magnet power supply that meets the required switching network element switching capability and reliability of the nuclear fusion plasma breakdown power supply.
Disclosure of utility model
The application provides a switch network unit for plasma breakdown of a nuclear fusion magnet power supply, which at least solves the technical problem of how to apply the plasma breakdown of the nuclear fusion magnet power supply in the related technology.
The embodiment of the application provides a switching network unit for plasma breakdown of a nuclear fusion magnet power supply, which is connected in series between the power supply and a magnet load, and comprises an input connection row, a current limiting resistor and a current limiting resistor, wherein the input connection row is arranged on a bottom plate and connected with the magnet load, the input connection row and the output connection row are arranged on two sides of an insulating layer, projections of the input connection row and the output connection row on the insulating layer are overlapped, currents in the input connection row and the output connection row on two sides of the insulating layer are equal in size and opposite in direction, and the current limiting resistor is connected in series between the input connection row and the output connection row and connected in parallel with the current limiting switch.
In one embodiment, a midpoint terminal of the input connection row is connected to the power source.
In one embodiment, a midpoint terminal of the output connection row is connected to the magnet load.
In one embodiment, one end of each first branch connection row is connected with the input end of the converter switch in a one-to-one correspondence manner, and the other end of each first branch connection row is connected with the input connection row at equal intervals, and one end of each second branch connection row is connected with the output end of the converter switch in a one-to-one correspondence manner, and the other end of each second branch connection row is connected with the output connection row at equal intervals.
In one embodiment, the first branch connection rows are symmetrically distributed on two sides of the midpoint terminal of the input connection row, and the second branch connection rows are symmetrically distributed on two sides of the midpoint terminal of the output connection row.
In one embodiment, the current direction of the converter switch is perpendicular to the current discharge of the input connection bank and the output connection bank.
In one embodiment, the switch network unit further comprises at least one bracket, one end of which is fixedly mounted on the bottom plate, and the other end of which is fixedly connected with the input connection row, the insulating layer and the output connection row.
In one embodiment, the current limiting resistor is a resistance adjustable resistor.
In one embodiment, the switching network unit further comprises a base fixedly mounted on the base plate for fixing and dissipating heat of the converter switch.
In one embodiment, the switch network unit further comprises a driving board, wherein the driving board is arranged on the bottom board and provided with a plurality of driving circuits corresponding to the converter switches one by one, and the driving circuits are connected with the control end of the converter switches and used for controlling the on and off of the converter switches.
In one embodiment, the switching network unit further comprises a current sensor arranged on a branch circuit where the converter switch is located and a main circuit where the input connection row and the output connection row are located and used for collecting branch current and main circuit current, and a voltage sensor arranged at two ends of the current limiting resistor and used for collecting voltages at two ends of the current limiting resistor and used for triggering an alarm when the voltages are abnormal.
The application has at least the following beneficial effects:
All devices in the switch network unit are arranged on a bottom plate, an input connection row is connected with a power supply, an output connection row is connected with a magnet load, and the input connection row and the output connection row are symmetrically and tightly arranged on two sides of an insulating layer. The input connection row and the output connection row are overlapped in projection on the insulating layer, the size parameters of the input connection row and the output connection row on two sides of the insulating layer are the same, so that when the converter switch is turned on, the currents flowing through symmetrical parts on two sides of the insulating layer are equal in size and opposite in direction, magnetic fields generated by the currents are offset, stray inductance can be effectively reduced, the influence of the stray inductance on the converter switch is further reduced, and the current equalizing effect of each converter switch is improved.
Further, the converter switch may be connected to the input connection row and the output connection row by a branch connection row. The branch connection row can comprise a first branch connection row at the input side and a second branch connection row at the output side, wherein one end of the first branch connection row is fixedly connected with the input connection row, the other end of the first branch connection row is connected with the input end of the converter switch, one end of the second branch connection row is fixedly connected with the output connection row, and the other end of the second branch connection row is connected with the output end of the converter switch. All the first branch connecting rows and the second branch connecting rows adopt connecting rows with the same size parameters and are uniformly distributed on two sides of the midpoint terminal, so that impedance difference among the branches of the converter switch is reduced, and the current sharing effect is improved.
Further, the current flowing through the converter switch is perpendicular to the current flowing through the input connection row and the output connection row. The influence of the current magnetic fields of the input connection row and the output connection row on the converter switch is reduced, and the current sharing effect is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic diagram of a circuit structure of an exemplary switching network unit according to an embodiment of the present application;
Fig. 2 is a schematic diagram of the structure of another exemplary switching network unit in an embodiment of the present application;
fig. 3 is an enlarged schematic view of a local area a in an exemplary switching network unit according to an embodiment of the present application;
Fig. 4 is a schematic diagram of a driving portion of an exemplary switching network unit in an embodiment of the present application.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a list of elements, systems, products, or devices is not necessarily limited to those elements, systems, products, or devices that are expressly listed but may include other elements, systems, products, or devices that are not expressly listed.
The application provides a switching network unit for plasma breakdown of a nuclear fusion magnet power supply, which is shown in fig. 1-3, wherein the switching network unit 100 is connected in series between the power supply and a magnet load, and specifically comprises an input connection row 10, an output connection row 20, a current limiting resistor 40 and a current limiting network 30, wherein the input connection row 10 is arranged on a bottom plate 50 and connected with the power supply, the output connection row 20 is arranged on two sides of an insulating layer 11, projections of the input connection row 10 and the output connection row 20 on the insulating layer 11 overlap, currents in the input connection row 10 and the output connection row 20 on two sides of the insulating layer 11 are equal in magnitude and opposite in direction, the current limiting network 30 comprises a plurality of current limiting switches 31 connected between the input connection row 10 and the output connection row 20 in parallel, and the current limiting resistor 40 is connected in series between the input connection row 10 and the output connection row 20 and connected in parallel with the current limiting switches 31.
In this embodiment, the switching network unit 100 operates according to the principle that the switch 31 receives an on command, a discharging current of the power supply flows through the input connection row 10, flows to the magnet load sequentially through the input end of the switch 31, the output end of the switch 31 and the output connection row 20, and starts to operate after the magnet load is excited by the power supply, and then the switch 31 receives an off command, a branch where the switch 31 is located is cut off, and the current flows through the input connection row 10 and flows out sequentially through the current limiting resistor 40 and the output connection row 20.
In this embodiment, all devices in the switching network unit 100 are mounted on the base plate 50, the input connection row 10 is connected to a power source, the output connection row 20 is connected to a magnet load, and the portions of the input connection row 10 and the output connection row 20 for connecting the commutating switches 31 are closely disposed on both sides of the insulating layer 11. The input connection row 10 and the output connection row 20 of the part have the same size parameters so as to ensure that when the converter switch 31 is turned on, the currents flowing through the symmetrical parts on two sides of the insulating layer 11 are equal in size and opposite in direction, so that magnetic fields generated by the currents are mutually offset, stray inductance can be effectively reduced, the influence of the stray inductance on the converter switch 31 is further reduced, and the current sharing effect of each converter switch 31 is improved.
In one embodiment, the input connection row 10 and the output connection row 20 may be dc bus bars such as copper bars, aluminum bars, and the like, and may also be dc bus bars such as cables. The converter switch 31 may be a fully-controlled solid-state switching device, for example, a fully-controlled solid-state switching device such as MOSFET, IGBT, GTO, GTR may be used. In the present embodiment, the input connection line 10 and the output connection line 20 are exemplified by copper bars, and the converter switch 31 is exemplified by IGBTs.
In this embodiment, a fully-controlled solid-state switching device is adopted, so that the switching network unit 100 has fast switching speed, small heat consumption, simple structure, easy maintenance and operation, and convenient access to different magnet coil circuits.
In one embodiment, the power supply is connected to the midpoint terminal of the input connection bank 10, and/or the magnet load is connected to the midpoint terminal of the output connection bank 20, that is, the midpoint terminal of the input connection bank 10 is used as an input position and/or the midpoint terminal of the output connection bank 20 is used as an output position, so that the length between the current input end and/or the output end and the current-converting switch 31 is reduced, the impedance difference between the branches where the current-converting switches 31 are located is reduced, and the current-equalizing effect of the current-converting switch 31 is improved.
In one embodiment, the converter switches 31 are uniformly distributed on both sides of the midpoint terminal, and in this embodiment, the converter switches 31 may be connected to the input connection row 10 and the output connection row 20 through the branch connection rows. As shown in fig. 3, the branch connection rows may include a first branch connection row 60 on the input side and a second branch connection row 70 on the output side, where one end of the first branch connection row 60 is fixedly connected to the input connection row 10 and the other end is connected to the input end of the converter switch 31, and one end of the second branch connection row 70 is fixedly connected to the output connection row 20 and the other end is connected to the output end of the converter switch 31. All the first branch connection rows 60 and the second branch connection rows 70 adopt connection rows with the same size parameters and are uniformly distributed on two sides of the midpoint terminal, so that impedance difference among branches of the converter switch 31 is reduced, and current sharing effect is improved.
In order to further reduce the impedance difference, in another embodiment, the resistances of the first branch connection row 60 and the second branch connection row 70 are sequentially reduced from the midpoint terminal to two sides, in this embodiment, the resistance is sequentially reduced by increasing the width or thickness of the branch connection rows once, and the resistance reduction of each branch connection row is determined by measuring the resistance increase of the installation position of each branch connection row in the input connection row 10 and the output connection row 20, so that the resistance between the power supply and the input end of each converter switch 31 through the input connection row 10 is the same, and the resistance between the power supply and the output end of each converter switch 31 through the output connection row 20 is the same, thereby further improving the current equalizing effect.
In other embodiments, the connection position between the power source and the input connection row 10 and the connection position between the magnet load and the output connection row 20 may be set at other positions other than the contact point terminal, and the resistance between each of the current-converting switches 31 and the power source and the resistance between each of the current-converting switches 31 and the magnet load are close by matching the resistances of the parallel branches, so that the impedance difference between the branches of the current-converting switches 31 is reduced, and the current-sharing effect is improved.
In one embodiment, to further reduce the influence of the magnetic field generated by the current in the input connection bank 10 and the output connection bank 20 on the current-converting switch 31, in some embodiments, the current flowing through the current-converting switch 31 is perpendicular to the current flowing through the input connection bank 10 and the output connection bank 20, so as to reduce the influence of the magnetic field of the current in the input connection bank 10 and the output connection bank 20 on the current-converting switch 31, and improve the current sharing effect. Illustratively, the first branch connection row 60 may be perpendicular to the input connection row 10, and the second branch connection row 70 may be perpendicular to the output connection row 20. The direction of the current inside the converter switch 31 may be perpendicular to the input connection line 10 and the output connection line 20 by setting the installation angle of the converter switch 31.
In one embodiment, the switching network unit 100 further includes a base fixedly mounted on the base plate 50 for fixing and dissipating heat from the converter switch 31. In this embodiment, one, two or more of the current converting switches 31 may be installed per base.
In one embodiment, a bracket 51 is provided between the input and output connection rows 10 and 20 and the insulating layer 11 between the input and output connection rows 10 and 20 and the base plate 20 for fixing the input and output connection rows 10 and 20 and the insulating layer 11 between the input and output connection rows 10 and 20 to the base plate 50. In the present embodiment, the bracket 51 may be fastened by fastening means such as bolts, studs, rivets, etc., and in the present embodiment, the stud fastening means is described as an example, and in order to achieve insulation between the input connection row 10 and the output connection row 20, an insulation sleeve is sleeved between the studs and the input connection row 10 and/or between the studs and the output connection row 20.
In one embodiment, the current limiting resistor 40 is a resistance adjustable resistor. In this embodiment, the current limiting resistor 40 is a modularized non-inductive resistor with an adjustable resistance. Referring to fig. 2, one end of the current limiting resistor 40 is connected to the input connection line 10 through the first resistor connection line 80, and the other end is connected to the output connection line 20 through the second resistor connection line 90. Wide range circuit current change rate modulation at different values is achieved by adjusting the resistance of the current limiting resistor 40.
In one embodiment, as shown in fig. 4, the driving part 200 further includes a driving board 201, which is mounted on the bottom board 50 and has a plurality of driving circuits corresponding to the commutating switches 31 one by one, and the driving circuits are connected to the control terminals of the commutating switches 31 and are used for controlling the on/off of the commutating switches 31. The plurality of driving circuits may be separately and correspondingly disposed on the plurality of driving boards 201, or may be integrated on one driving board 201. In one embodiment, the driving part may further include a driving board power supply 202 for supplying power to the respective driving boards 201, a driving signal distribution board 203 for receiving a control signal and transmitting the control signal to the respective driving boards 201 or the respective driving circuits through optical fibers so that the driving circuits drive the corresponding commutating switches 31.
In an embodiment, the switching network unit 100 may further comprise an electrical signal measuring part, wherein the electrical signal measuring part may comprise a current sensor arranged on a branch where the converter switch 31 is located and a main circuit where the input connection bank 10 and the output connection bank 20 are located, for collecting the branch current and the main current.
In the foregoing embodiments of the present application, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application, which are intended to be comprehended within the scope of the present application.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420952996.5U CN222262469U (en) | 2024-05-06 | 2024-05-06 | Switching network unit for nuclear fusion magnet power supply plasma breakdown |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420952996.5U CN222262469U (en) | 2024-05-06 | 2024-05-06 | Switching network unit for nuclear fusion magnet power supply plasma breakdown |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222262469U true CN222262469U (en) | 2024-12-27 |
Family
ID=94012035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420952996.5U Active CN222262469U (en) | 2024-05-06 | 2024-05-06 | Switching network unit for nuclear fusion magnet power supply plasma breakdown |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222262469U (en) |
-
2024
- 2024-05-06 CN CN202420952996.5U patent/CN222262469U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10141861B2 (en) | Power conversion unit, power converter and method of manufacturing power converter | |
| US5132896A (en) | Inverter unit with improved bus-plate configuration | |
| JP7230048B2 (en) | Electronic power switch drive module | |
| US5463252A (en) | Modular solid state relay | |
| CN101558462B (en) | Device for galvanic isolation of a semiconductor switch, electronic switching device and contact-making and isolating module | |
| CN111433989A (en) | Motor control system with integrated solid state contactor and relay and method of operating the same | |
| US11381109B2 (en) | Uninterruptible power supply system | |
| US12021510B2 (en) | DC output solid state contactor assembly | |
| CN222262469U (en) | Switching network unit for nuclear fusion magnet power supply plasma breakdown | |
| US11570884B2 (en) | Relay arrangement with improved heat dissipation and converter device having a relay arrangement of this kind | |
| CN1307798C (en) | Circuit arrangement for the reliable switching of electrical circuits | |
| JP2003018860A (en) | Power converter | |
| JP3792814B2 (en) | Rail structure system for intermediate circuit of rectifier | |
| JPH09274904A (en) | Battery array wiring method | |
| CN109565944B (en) | Phase module for high-power converter | |
| CN110915089B (en) | Power flow control device for controlling the distribution of electric current in a grid network | |
| CN110932569A (en) | A parallel structure of four-quadrant power module IGBTs for electric locomotives | |
| CN110506384A (en) | Low inductance half-bridge power module | |
| JP5778706B2 (en) | Semiconductor switch | |
| CN108702097A (en) | converter | |
| CN105140784A (en) | Three-phase buses in switch cabinet | |
| Dahlerup-Petersen et al. | A high-current, IGBT-based static switch for energy extraction in superconducting power circuits: Concept, design and production of a 30 kA monopolar and a 1 kA bipolar fast opening switches | |
| CN217240578U (en) | Drive circuit for power electronic switch of solid-state circuit breaker | |
| CN110546839B (en) | Short-circuit-proof busbar arrangement | |
| CN210430429U (en) | Electrical equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |