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Motores
de
características
especiales
Indice
1.- Regulación de la velocidad.
2.- Motores de 2 velocidades, devanados independientes.
3.- Motores de 2 velocidades, conexión Dahlander.
4.- Motores de 3 y 4 velocidades.
5.- Maquinas trifasicas síncronas y asíncronas.
5.1.- Particularidades comunes.
5.2.- Forma constructiva y funcionamiento de una maquina síncrona.
6.- Maquinas asíncronas.
6.1.- Generación del campo giratorio.
6.2.- Funcionamiento del rotor.
6.3.- Arranque del motor trifasico. Corriente y par de arranque.
Conexión estrella - triángulo.
6.4.- Rotor con anillos rozantes, rotor de jaula y rotor de efecto Skin.
Características del par.
1.- Regulación de la velocidad.
En los trifasicos con rotor en cortocircuito, normalmente basta con que la velocidad sea bastante constante, pero a veces se necesita variar la velocidad, bien sea en forma gradual o escalonada, el procedimiento más utilizado para esta regulación de velocidad es la de variar el numero de polos del estator, puesto que sabemos que la velocidad de un motor depende de la frecuencia de la red y del numero de pares del motor.
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Enviado por: Alejandro Idioma: castellanoPaís: España