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maquinas de corriente alterna.pdf - Universidad Tecnológica de ...

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234 Capítulo 3. La máquina <strong>de</strong> inducción<br />

440V, Y<br />

3φ,60hz<br />

P = 4<br />

+<br />

440<br />

√<br />

3<br />

= 254V<br />

440V ∼<br />

ω r<br />

−<br />

(a)<br />

(b)<br />

V 2 =<br />

Figura 3.45: Motor <strong>de</strong>l ejemplo 3.4<br />

√<br />

2<br />

3<br />

(√ )<br />

3<br />

2 (V β − V γ ) = 311∠ − 90 ◦ V.<br />

Ver figura 3.46<br />

En el rotor:<br />

Vα r = V β r = V γ r = 0. (rotor en cortocircuito)<br />

ω s<br />

V 1 = 311∠0 ◦<br />

V 2 = 311∠ − 90 ◦ V<br />

Figura 3.46: Voltaje <strong>de</strong>l bifásico.<br />

Cálculo <strong>de</strong> componentes simétricas:<br />

⇒ V a = V A = 0.<br />

V fs = 1 √<br />

2<br />

(V 1 + jV 2 ) = 1 2 (311∠0◦ + (1∠90 ◦ )311∠ − 90 ◦ ) = 439,82∠0 ◦ V,<br />

V bs = 1 √<br />

2<br />

(V 1 − jV 2 ) = 1 2 (311∠0◦ + (1∠ − 90 ◦ )311∠ − 90 ◦ ) = 0∠0 ◦ V.<br />

V fr = 1 √<br />

2<br />

(V a + jV A ) = 0∠0 ◦ V.

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