01.01.2015 Views

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

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

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

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

3.7. Transitorios en la máquinas <strong>de</strong> inducción 227<br />

Como ilustración se utiliza la transformación:<br />

Así:<br />

es idéntica; pero:<br />

V fs = V 1 + jV 2<br />

= 26∠0 ◦ ,<br />

2<br />

V bs = 0,<br />

I fs = 0,0966∠ − 31,33 ◦ ,<br />

I ′ fr = −I fs = 0,0966∠148,67 ◦ ,<br />

I bs = I br ′ = 0.<br />

[ ] [ ][ ]<br />

I1 1 1 Ifs<br />

=<br />

I 2 −j j I bs<br />

I 1 = 0,0966∠ − 31,33 ◦ ,<br />

I 2 = 0,0966∠ − 121,33 ◦ .<br />

P ent = (26)(0,0966)cos(31,33 ◦ ) + (26)(0,0966)cos(31, 33 ◦ ) = 4,29 W,<br />

que es la mitad <strong>de</strong> la potencia total <strong>de</strong> entrada.<br />

b)<br />

P = V fs I fs ,<br />

P = (26)(0,0966)cos(31, 33 ◦ ) = 2,145 W,<br />

El <strong>de</strong>vanado <strong>de</strong> control es V 1<br />

V 1 = 13∠0 ◦ , V 2 = 26∠ − 90 ◦ ,<br />

V fs = 13∠0◦ + j26∠ − 90 ◦<br />

√<br />

2<br />

= 27,58∠0 ◦ ,<br />

V bs = 13∠0◦ − j26∠ − 90 ◦<br />

√<br />

2<br />

= −9,19∠0 ◦ .<br />

De la figura 3.40<br />

27,58∠0 ◦ = (230 + j140)I fs ,<br />

I fs = 0,0724∠ − 31,33 ◦ .<br />

−9,19∠0 ◦ = (230 + j140)I bs ,<br />

I bs = 0,034∠148,67 ◦ .<br />

I ′ fr = 0,1024∠148,67 ◦ ,<br />

I ′ br = 0,034∠ − 31,33 ◦ .

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!