论文部分内容阅读
KTX反场箍缩实验装置不锈钢环形真空室外包覆一层1.5 mm厚无氧铜皮用来稳定等离子体,真空室外壁与铜皮间用聚四氟薄板隔开,简单的壁加热烘烤除气手段难以实现。巧妙地将纵场(TF)线圈作为感应加热线圈,通过工频电磁感应直接加热方法来实现真空室的烘烤除气。计算了热平衡条件下由于传导、对流引起的热量损失确定了保温阶段所需的加热功率。工频电源采用三相交流供电,晶闸管全波整流;4只晶闸管构成的H桥逆变电路为串联LC谐振电路供电。电源频率选择2000 Hz,通过对系统电参数的计算,确定串联谐振电容参数。串联LC谐振电路等效为纯电阻电路,通过改变整流晶闸管的触发角改变直流电压来实现加热功率在0~153 kW间可调,满足了加热初始大功率升温和后阶段小功率保温的加热流程的要求。加热中通过TF线圈的电流、电压以及过程中的温升对TF线圈都是安全的,设计方案可行。
KTX anti-field pinch experiment stainless steel ring vacuum chamber coated with a layer of 1.5 mm thick oxygen-free copper skin used to stabilize the plasma, the outer wall of the vacuum chamber and the copper skin with a polytetrafluoroethylene sheet separated by a simple wall heating baking Gas means difficult to achieve. Cleverly the vertical field (TF) coil as an induction heating coil, the frequency heating by direct induction heating method to achieve the vacuum degassing chamber. The heat loss caused by the conduction and convection under the heat balance condition is calculated, which determines the heating power needed during the heat preservation phase. Power frequency power supply using three-phase AC, thyristor full-wave rectifier; H-bridge circuit composed of four thyristors LC series LC resonant circuit power supply. Power frequency selection 2000 Hz, through the calculation of the system electrical parameters to determine the series resonant capacitor parameters. The series LC resonant circuit is equivalent to a purely resistive circuit. The heating power can be adjusted from 0 to 153 kW by changing the DC voltage by changing the triggering angle of the rectifying thyristor, thus satisfying the heating process of the heating initial high-power heating and the post-stage low-power thermal insulation Request. Heating through the TF coil current, voltage and temperature during the process of the TF coil is safe, the design is feasible.