Motor Track


Notes

Temp

Resis

Skin

60 Hz

10 KHz

100 KHz

K

ohm m

mm-√Hz

mm

mm

mm

200

1.6e-8

201

26

2.0

0.64

300

2.7e-8

262

34

2.6

0.83

400

3.9e-8

314

41

3.1

0.99

600

6.1e-8

393

51

3.9

1.24

800

8.7e-8

469

61

4.6

1.48

Reactive power supplies resistive drops in the rotor. Run capacitors on big induction motors supply less than a percent of total power to maintain 90 degrees out-of-phase currents in rotor windings.

Aluminum specific heat is 910 J / Kg-K according to engineeringtoolbox.com (at what temperature???)

According to this, specific heat increases from about 900 J/Kg-K at 298 C to 130 J/Kg-K . The slope steepens near 300 K.

MotorTrack (last edited 2017-07-22 22:29:23 by KeithLofstrom)