NEC-LIST: Self and mutual inductance (ASCII version)

(If the figures do not appear on your screen, and you would like to
see the results, please drop me an email. Thank you.)

Hello everyone,

I made some calculations for self inductance for the following 2 cases
and mutual inductance for the 2nd case. Any comment/criticism is
welcome.

1. Isolated single busbar
2. 3 busbar as shown below

<IMG SRC="../../../../Lidu/Inductance/bus.gif" HEIGHT=318 WIDTH=320>

The self inductance for an isolated single busbar vs frequency
looks like this

<IMG SRC="../../../../Lidu/Inductance/self.gif" HEIGHT=283 WIDTH=352>

For 3 busbar configulation shown in the first figure, the top busbar
is excited by a current.&nbsp; The self inductance vs frequency is
shown below,

<IMG SRC="../../../../Lidu/Inductance/self_3bar.gif" HEIGHT=285 WIDTH=352>

Compare these results with the single busbar case, the inductance at
low frequency is about 40% lower, and at high frequencies, the
inductance becomes zero. IS THIS TRUE? I welcome any input.

The mutual inductances are

<IMG SRC="../../../../Lidu/Inductance/mutual_3bar.gif" HEIGHT=282 WIDTH=353>

The mutual inductances seem to be reasonable, but again any input is
greatly appreciated.

Thank you for your attention!

Best regards,

Lidu Huang
Texas Instruments, Tel: 508 2363747
Received on Sat May 02 1998 - 15:40:25 EDT