CN-120854000-B - Device for controlling energy constraint time by using limiter bias system

CN120854000BCN 120854000 BCN120854000 BCN 120854000BCN-120854000-B

Abstract

The invention relates to the technical field of controllable nuclear fusion, in particular to a device for controlling energy constraint time by using a limiter bias system. The portable power source device comprises a bias electrode head, a flexible connecting wire, a limiter main body and a limiter main body, wherein one end of the flexible connecting wire is connected with the bias electrode head, the other end of the flexible connecting wire is connected with a bias power supply system of the NCST spherical tokamak device, the limiter main body is arranged on one side of the NCST spherical tokamak device, and the bias electrode head is arranged on the limiter main body and used for inhibiting escape electrons generated by discharging of the NCST spherical tokamak device. According to the invention, the limiter bias system is arranged to inhibit escape electrons generated by discharge of the NCST spherical tokamak device, so that the energy constraint time parameter of the NCST spherical tokamak device is improved, the instability of plasma can be obviously inhibited, the duration of plasma current is further prolonged, and the magnitude of plasma current is improved.

Inventors

CHEN XIAOCHANG
CHEN YU
Liu Sanqiu
CHEN HUAYING

Assignees

南昌大学

Dates

Publication Date: 20260508
Application Date: 20250730

Claims (8)

1. An apparatus for controlling energy constraint time using a limiter bias system, comprising: a bias electrode tip (1), the bias electrode tip (1) comprising: a stainless steel housing (101) mounted on the limiter body (3); a first graphite pad (102) mounted within the stainless steel housing (101); An insulating ceramic (103) mounted on the first graphite pad (102) side remote from the stainless steel case (101); a second graphite pad (104) mounted on the insulating ceramic (103) side remote from the first graphite pad (102); A positive electrode plate (105) mounted on the second graphite pad (104) side away from the insulating ceramic (103); One end of the soft connecting wire (2) is connected with the bias electrode head (1), and the other end of the soft connecting wire is connected with a bias power supply system of the NCST spherical Tokamak device; The limiter main body (3) is arranged on one side of the NCST spherical tokamak device, and the bias electrode head (1) is arranged on the limiter main body (3) and is used for inhibiting escape electrons generated by discharging of the NCST spherical tokamak device; a connection assembly for assisting in mounting a limiter body (3), the connection assembly comprising: An electrical connection joint (4) mounted on the push window of the limiter body (3); a perforated flange (5) mounted on the electrical connection joint (4); a wall-through seal (6) mounted on the perforated flange (5); And the corrugated pipe (7) is arranged on the perforated flange (5).
2. The device for controlling energy confinement time using a limiter bias system according to claim 1, wherein the positive electrode plate (105) is made of metallic tungsten or graphite material.
3. The apparatus for controlling energy constraint time using a limiter bias system of claim 2, wherein the bias power system comprises: The rectification module is connected with an external power grid; And the power unit module is connected with the rectifying module, and is of an H-bridge inverter structure based on high switching frequency IGBT.
4. The apparatus for controlling energy constraint time using a limiter bias system of claim 3 wherein the rectifying module is diode uncontrolled rectifying or controlled rectifying.
5. The apparatus for controlling energy constraint time using a limiter bias system of claim 4 wherein the H-bridge inverter configuration is a multi-bridge multi-arm series-parallel configuration.
6. The apparatus for controlling energy constraint time using a limiter bias system of claim 4, further comprising: and the filter is connected to the output end of the H-bridge inverter.
7. The apparatus for controlling energy constraint time using a limiter biasing system of claim 1 wherein the wall-through seal (6) is CF35 ceramic penalizing material.
8. A device for controlling energy constraint time using a limiter bias system of claim 3 wherein the bias power system is a 500V rated, 1000A high power constant voltage source with a rated output of 50kW.

Description

Device for controlling energy constraint time by using limiter bias system Technical Field The invention relates to the technical field of controllable nuclear fusion, in particular to a device for controlling energy constraint time by using a limiter bias system. Background The existing NCST spherical Tokamak device has the problems of more escaped electrons and insufficient energy constraint time parameters in the discharging process, can seriously influence plasma constraint and has defects. Disclosure of Invention The present invention aims to at least ameliorate one of the technical problems of the prior art. To this end, the present invention proposes an apparatus for controlling energy constraint time using a limiter bias system. The technical scheme of the invention is as follows: an apparatus for controlling energy constraint time using a limiter bias system, comprising: Biasing the electrode head; One end of the soft connecting wire is connected with the bias electrode head, and the other end of the soft connecting wire is connected with a bias power supply system of the NCST spherical Tokamak device; And the limiter body is arranged on one side of the NCST spherical tokamak device, and is provided with a bias electrode head for inhibiting escape electrons generated by the discharge of the NCST spherical tokamak device. In one possible solution, further, the bias electrode tip includes: A stainless steel housing mounted on the limiter body; A first graphite pad mounted within the stainless steel housing; insulating ceramic mounted on the side of the first graphite pad remote from the stainless steel housing; a second graphite pad mounted on the insulating ceramic side remote from the first graphite pad for cushioning; and a positive electrode plate mounted on the second graphite pad side remote from the insulating ceramic. In one possible solution, further comprising a connection assembly for assisting in installing the limiter body, the connection assembly comprising: An electrical connection fitting mounted on the advancing window of the limiter body; A perforated flange mounted on the electrical connection joint; a wall-through seal mounted on the perforated flange; and the corrugated pipe is arranged on the perforated flange. In one possible technical solution, further, the positive electrode plate is made of tungsten metal or graphite material. In one possible solution, further, the bias power supply system includes: The rectification module is connected with an external power grid and used for taking power from the power grid and rectifying the power to provide energy for the direct-current support capacitor so as to keep the voltage of the direct-current bus stable; And the power unit module is connected with the rectifying module, is of an H-bridge inverter structure based on a high switching frequency IGBT, and can enable a power supply to respond quickly and output current ripple to be small. In one possible technical solution, further, the rectifying module is diode uncontrollable rectification or controllable rectification, and is used for ensuring that the voltage on the direct current supporting capacitor is relatively constant. In one possible technical solution, further, the H-bridge converter structure is a multi-bridge multi-arm serial-parallel structure, and is used for improving the equivalent switching frequency of the power supply. In one possible technical solution, further, the method further includes: and the filter is connected to the output end of the H-bridge converter and is used for improving the output quality of the power supply. In one possible solution, further, the wall-through seal is made of CF35 ceramic penalizing material. In one possible technical scheme, further, the bias power supply system is a high-power constant-voltage source with rated output of 500V and 1000A, the rated output power is 50kW, the working mode is pulse working, the single pulse working time is not more than 10s, and the requirements of controlling the energy constraint time are met while the bias power supply system is economical and practical. According to the device for controlling the energy constraint time by using the limiter bias system, the limiter bias system is arranged to inhibit the escape electrons generated by the discharge of the NCST spherical Tokamak device, improve the energy constraint time parameter of the NCST spherical Tokamak device, remarkably inhibit the instability of plasma, further prolong the duration of plasma current, improve the size of plasma current and enrich the research and teaching significance of the NCST device. Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Drawings In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that