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Three-phase busbar losses
Problem type:
Plane-parallel problem of AC Magnetics.
Geometry:
Given:
Material of busbar - aluminum;
AC current I = 1000 A (R.M.S. value);
Frequency f: 50 Hz, 400 Hz, 1 kHz, 3 kHz.
Problem:
Calculate the dependence of the busbar losses on the alternating current frequency.
Results:
Current density distribution of a three-phase busbar (f = 50 Hz):
Busbar losses as a function of frequency:
Frequency |
A |
B |
C |
|
P [W/m] |
50 Hz |
25.3 |
25.0 |
25.0 |
PAC/PDC |
1.05 |
1.04 |
1.04 |
|
P [W/m] |
400 Hz |
37.6 |
50.7 |
37.3 |
PAC/PDC |
1.55 |
2.10 |
1.55 |
|
P [W/m] |
1000 Hz |
56 |
90 |
56 |
PAC/PDC |
2.3 |
3.7 |
2.3 |
|
P [W/m] |
3000 Hz |
98 |
155 |
98 |
PAC/PDC |
4.1 |
6.4 |
4.1 |
|