The center post is the most critical component as an inboard part of the toroidal field coil for the low aspect ratio tokamak. During the discharge it endures not only a tremendous ohmic heating owing to its carrying ...The center post is the most critical component as an inboard part of the toroidal field coil for the low aspect ratio tokamak. During the discharge it endures not only a tremendous ohmic heating owing to its carrying a rather high current but also a large nuclear heating and irradiation owing to the plasma operation. All the severe operating conditions, including the structure stress intensity and the stability of the structure, largely limit the maximum allowable current density. But in order to contain a very high dense plasma, it is hoped that the fusion power plant system can operate with a much high maximum magnetic field BT ≥12 T-15 T in the center post. A new method is presented in this paper to improve the maximum magnetic field up to 17 T and to investigate the possibility of the normal conducting center post to be used in the future fusion tokamak power plant.展开更多
This paper uses CT to gain the energy directly from the high-voltage transmission line, to address the problem of power supply for monitoring system in high voltage side of transmission line. The draw-out power coil c...This paper uses CT to gain the energy directly from the high-voltage transmission line, to address the problem of power supply for monitoring system in high voltage side of transmission line. The draw-out power coil can induce voltage from the transmission line, using single-chip microcomputer to analog and output PMW wave to control the charging module, provides a stable 3.4 V DC voltage to the load, and solve the problem of easy saturating of core. The power supply based on this kind of draw-out power coil has undergone the overall testing, and it is verified-showing that it can properly work in a non-saturated status within the current range of 50 - 1000 A, and provide a stable output. The equipment also design protection circuit to improve the reliability to avid the impacts of the impulse current or short-circuit current. It effectively solves the problem of power supply for On-line Monitoring System of Transmission.展开更多
传统的感应电能传输(inductive power transfer,IPT)系统只含有单个逆变电源与单个初级线圈,由于受到功率器件的容量限制,较难满足轨道交通非接触供电等大功率应用的要求。为增加IPT系统的输出功率,该文构建了基于双初级线圈并绕的IPT系...传统的感应电能传输(inductive power transfer,IPT)系统只含有单个逆变电源与单个初级线圈,由于受到功率器件的容量限制,较难满足轨道交通非接触供电等大功率应用的要求。为增加IPT系统的输出功率,该文构建了基于双初级线圈并绕的IPT系统,通过初级线圈产生磁场的叠加,实现IPT系统大功率输出。利用互感耦合理论对此系统进行详细分析,发现此结构不但需要补偿各初级线圈的自感,而且还需要额外电容补偿两初级线圈间的互感。研究表明,通过选择合适的额外补偿电容值,不仅能使各逆变器工作在谐振状态,还可以有效分配两逆变器的输出功率,达到合理分配两逆变器输出容量的目的。建立输出总功率为1.4 k W的实验系统,验证了两逆变器输出功率比为1:1和1:2的工况。这种基于双初级线圈并绕的IPT系统具有结构简单等优点,可望在轨道交通非接触供电系统等大功率场合中得到应用。展开更多
基金The project supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) Nuclear Researchers Exchange Program of Japan
文摘The center post is the most critical component as an inboard part of the toroidal field coil for the low aspect ratio tokamak. During the discharge it endures not only a tremendous ohmic heating owing to its carrying a rather high current but also a large nuclear heating and irradiation owing to the plasma operation. All the severe operating conditions, including the structure stress intensity and the stability of the structure, largely limit the maximum allowable current density. But in order to contain a very high dense plasma, it is hoped that the fusion power plant system can operate with a much high maximum magnetic field BT ≥12 T-15 T in the center post. A new method is presented in this paper to improve the maximum magnetic field up to 17 T and to investigate the possibility of the normal conducting center post to be used in the future fusion tokamak power plant.
文摘This paper uses CT to gain the energy directly from the high-voltage transmission line, to address the problem of power supply for monitoring system in high voltage side of transmission line. The draw-out power coil can induce voltage from the transmission line, using single-chip microcomputer to analog and output PMW wave to control the charging module, provides a stable 3.4 V DC voltage to the load, and solve the problem of easy saturating of core. The power supply based on this kind of draw-out power coil has undergone the overall testing, and it is verified-showing that it can properly work in a non-saturated status within the current range of 50 - 1000 A, and provide a stable output. The equipment also design protection circuit to improve the reliability to avid the impacts of the impulse current or short-circuit current. It effectively solves the problem of power supply for On-line Monitoring System of Transmission.
文摘传统的感应电能传输(inductive power transfer,IPT)系统只含有单个逆变电源与单个初级线圈,由于受到功率器件的容量限制,较难满足轨道交通非接触供电等大功率应用的要求。为增加IPT系统的输出功率,该文构建了基于双初级线圈并绕的IPT系统,通过初级线圈产生磁场的叠加,实现IPT系统大功率输出。利用互感耦合理论对此系统进行详细分析,发现此结构不但需要补偿各初级线圈的自感,而且还需要额外电容补偿两初级线圈间的互感。研究表明,通过选择合适的额外补偿电容值,不仅能使各逆变器工作在谐振状态,还可以有效分配两逆变器的输出功率,达到合理分配两逆变器输出容量的目的。建立输出总功率为1.4 k W的实验系统,验证了两逆变器输出功率比为1:1和1:2的工况。这种基于双初级线圈并绕的IPT系统具有结构简单等优点,可望在轨道交通非接触供电系统等大功率场合中得到应用。
