| 有外回路的金属管屏蔽单电流磁场源的电路法解析 |
| |
| 引用本文： | 徐霖,傅正财,宋春燕. 有外回路的金属管屏蔽单电流磁场源的电路法解析[J]. 上海交通大学学报, 2005, 0(Z1) |
| |
| 作者姓名： | 徐霖 傅正财 宋春燕 |
| |
| 作者单位： | [1]上海交通大学电子信息与电气工程学院 [2]杭州市电力局 [3]上海 |
| |
| 摘 要： | 有外回路的金属管能有效屏蔽单电流磁场源,但屏蔽效果的计算要用数值方法,不便于应用.本文提出用电路法求解其屏蔽效能,推导了电路参数,给出了便捷的磁场和屏蔽效果解析计算式,并用边界元法计算软件和实验测量方法进行了验证.最后,给出了工程应用的实例.
|
| 关 键 词： | 磁场屏蔽 单向电流 金属管 电路 数值计算 |
Circuit Approach Solution for Magnetic Shielding by Cylindrical Shells Against a Unidirectional Current Source |
| |
| XU Lin,FU Zheng-cai,SONG Chun-yan. Circuit Approach Solution for Magnetic Shielding by Cylindrical Shells Against a Unidirectional Current Source[J]. Journal of Shanghai Jiaotong University, 2005, 0(Z1) |
| |
| Authors: | XU Lin FU Zheng-cai SONG Chun-yan |
| |
| Affiliation: | XU Lin1,FU Zheng-cai1,SONG Chun-yan2 |
| |
| Abstract: | Metallic cylindrical shell with external loop can effectively shield the magnetic field excited by a unidirectional current. The shielding effectiveness is usually evaluated by numerical method, which is not convenient for application.A circuit approach was employed to derive the shielding effectiveness of the metallic shell with external loop. Close-form expressions of the circuit parameters and easy-to-use formula for the calculation of shielding effectiveness were given. The effectiveness of the derived formula was validated by 2-D boundary element method simulation and laboratory measurements. Application example was also given. |
| |
| Keywords: | magnetic shielding unidirectional current metal tube circuit numerical calculation |
| 本文献已被 CNKI 维普 等数据库收录！ |
