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Les machines synchrones

Les machines synchrones. principes. Principes. Production de f.é.m. alternatives Champs tournants Champs tournants, suite. f. 50. =. p =. = 4. N S. 12,5. f = p N S. N S = 750 tr/min = 12,5 tr/s et f = 50 Hz . Schéma équivalent d’une phase. L . R. V. E. Pour une phase :.

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Les machines synchrones

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  1. Les machines synchrones

  2. principes

  3. Principes • Production de f.é.m. alternatives • Champs tournants • Champs tournants, suite

  4. f 50 = p = = 4 NS 12,5 f = p NS NS = 750 tr/min = 12,5 tr/s et f = 50 Hz 

  5. Schéma équivalent d’une phase L R V E Pour une phase : E = k NS(Ie)

  6. Excitation de la machine synchrone L R Ie V E

  7. Induit = stator inducteur Inducteur = rotor Induit + diodes alternateur Alternateur d’excitation NS Ie Moteur d’entraînement - +

  8. stator

  9. Enroulement turbo-alternateur 825 MVA, 20 kV

  10. Enroulements terminaux d’un alternateur de centrale hydro-électrique

  11. Barre en deux piles, refroidissement indirect Barre simple, refroidissement indirect Barre en quatre piles à refroidissement liquide direct

  12. Le rotor

  13. Rotor d’alternateur de 4472 MVA

  14. Centrale de São Simão, 6 alternateurs, diamètre 17,5 m, 282 MVA

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