6 folier pr. side - NTNU
6 folier pr. side - NTNU
6 folier pr. side - NTNU
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<strong>NTNU</strong><br />
<strong>NTNU</strong><br />
<strong>NTNU</strong><br />
Slide 391<br />
Slide 393<br />
Slide 395<br />
Sammenhenger mellom flukser<br />
ψ h =<br />
2<br />
1 + ( f r ⋅ ωn<br />
⋅ Trσ<br />
) x h<br />
⋅ ⋅ ψ s<br />
’ 2<br />
1 + ( f r ⋅ ωn<br />
⋅ Tr<br />
) x s<br />
ψ r =<br />
1 x h<br />
⋅ ⋅ ψ s<br />
’ 2<br />
1 + ( f ) x s<br />
r ⋅ ωn<br />
⋅ Tr<br />
ψ h =<br />
2<br />
1 + ( f r ⋅ ωn<br />
⋅ Trσ<br />
) ⋅ ⋅ψ<br />
r<br />
■ Stasjonært moment uttrykk:<br />
1<br />
m e = ⋅ f r ⋅ ωn<br />
⋅ Tr<br />
⋅ ψ<br />
x<br />
r<br />
1<br />
2<br />
m e = ⋅ f r ⋅ ωn<br />
⋅ Tr<br />
⋅ ψ r<br />
x r<br />
1.2<br />
1.15<br />
1.1<br />
1.05<br />
1<br />
0.95<br />
0.9<br />
0.85<br />
0.8<br />
0.75<br />
Konstant rotorfluks<br />
2<br />
r<br />
ψr<br />
x h ⋅ i sβ<br />
f r =<br />
ωn<br />
Trψ<br />
r<br />
⇒<br />
Flukskarakteristikker<br />
❙ s<br />
❙ h<br />
❙ r<br />
x rσ<br />
Trσ<br />
=<br />
ωn<br />
⋅ rr<br />
Trondheim 2000<br />
x h ψr<br />
me<br />
= ⋅ ψ r ⋅ isβ<br />
x r<br />
① ❙ r =1<br />
① ❙ =1<br />
h<br />
① ❙ r =1<br />
① ❙<br />
h<br />
=1<br />
① ❙ s =1<br />
① ❙ s =1<br />
0.7<br />
0 0.05 0.1 0.15<br />
Trondheim 2000<br />
Trondheim 2000<br />
<strong>NTNU</strong><br />
<strong>NTNU</strong><br />
<strong>NTNU</strong><br />
Slide 392<br />
Slide 394<br />
Slide 396<br />
■ Stasjonært moment uttrykk:<br />
1<br />
x<br />
Konstant luftgapsfluks<br />
f ⋅ ω ⋅ T<br />
r n r 2<br />
m e = ⋅<br />
⋅ ψ<br />
2 h<br />
r 1 + ( f r ⋅ ωn<br />
⋅ Trσ<br />
)<br />
f<br />
rk<br />
1<br />
=<br />
ω ⋅ T<br />
2.5<br />
2<br />
1.5<br />
1<br />
0.5<br />
n<br />
■ Modellering:<br />
rσ<br />
⇒<br />
m<br />
e,<br />
max<br />
1<br />
=<br />
2 ⋅ x<br />
rσ<br />
Momentkarakteristikker<br />
⋅ ψ<br />
❙ r =1 ③<br />
② ❙ s =1<br />
0<br />
0 0.02 0.04 0.06 0.08 0.1 0.12<br />
Innhold<br />
2<br />
h<br />
① ❙ h =1<br />
➨ Fysikalsk motor modell<br />
➨ Transformerte modeller….<br />
➨ Skalert modell<br />
➨ Orientering av aksesystem<br />
➨ Rotorfluksorientert modell<br />
■ Analyse av stasjonære forhold<br />
➨ Ekvivalentskjemaer for en asynkronmaskin<br />
➨ Stasjonære driftskarakteristikker<br />
■ Dynamisk analyse av motordriften:<br />
➨ Rotorfluksorientert regulering<br />
➨ Moment- og strømregulering<br />
➨ Turtallsregulering<br />
➨ Spesielle hensyn ved implementering av en rotorfluksorientert<br />
regulator<br />
➨ Direkte moment regulering - DTC<br />
➨ Estimeringsteknikker<br />
Trondheim 2000<br />
Trondheim 2000<br />
Trondheim 2000