Reply To: Focus fusion and transportation

[Rematog]

Aeronaut,

When you talk about this, I get the idea you are picturing typical power conditioning etc. equipment. Remember, we are talking about a 5MW machine, that’s 5000 KVA…..oh and thats just the Net output. Just a quick thought, if you are getting 42% net (I think I’ve seen this figure used), then:

5000KVA / 42% = 11,900 KVA Gross, So, 6,900 KVA is thus the input power. I don’t know what voltage we’re looking at, but a typical industrial voltage is 480V. So 11,900 KVA gross is abot 24,790 amps at 480 V.

Hmm…. that’s got to be wrong, no way an electrode would survive that amperage. Say you’re using 10,000 Volt (10Kv) power, so thats 11,900 KVA / 10 KV = 1,190 amps. You get the picture.

I’ve seen the cables used for a 2000 HP 3 phase 6,900 V motor. That requires over 200 amps and the three cables are wrist thick (lots of insulation on a 6,900 volt cable). (2000 HP / .75 Hp/kw /6.9Kv / Square root of 3 (3 phase AC) /95% (eff) = 235 amps)

Eric, are my back of the envelope calc. of the net, gross and input powers for a FF module in the ball park?

Rematog