About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Advances in Dielectric Materials and Electronic Devices
|
| Presentation Title |
Inductance of Stranded Metal Wires Stemming from Contacts Among the Strands |
| Author(s) |
Deborah D.L. Chung, Sruthi Krishnaswamy Narayanan |
| On-Site Speaker (Planned) |
Deborah D.L. Chung |
| Abstract Scope |
Stranded metal wires are widely used for electrical connections. This work discovered inductance in these wires. The stranded wire (commercial) consists of tin-coated copper strands of diameter 0.08 mm, with the number of strands N ranging from 252 to 5,000. The apparent single-strand inductance calculated from the measured stranded wire inductance by assuming that the strands were exactly inductors in parallel reaches 6.3 mH/m, compared to the measured single-strand inductance of 1.9 µH/m. The large ratio of the apparent-to-measured single-strand inductance (≤3,400) is linearly related to N. Thus, the strand-strand contacts govern the inductance. The strand’s internal structure contributes to 9% of the inductance. Both inductance and resistance decrease with increasing N. The fractional decrease in inductance is much less than that in the resistance. The inductance deviates from the model of inductors in parallel, due to the strand-strand contacts, whereas the resistance obeys the model of resistors in parallel. |