1. Rotors and unbalances

1.1 Rotors

A rotor consists of a shaft on which the active parts (wheels, windings, gears, etc.) are mounted. It is held in the stator by rotating connections (radial bearings and an axial thrust bearing); the journals are the parts of the shaft facing the bearings. A cantilever coupling transmits the drive torque.

Figures 1 (schematic diagram of an electrical machine) and 2 (alternator rotor) show inter-bearing rotors with the active part located between the trunnions. Figures

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Rotors and unbalances

BIGRET (R.), KARAJANI (P.), VIALARD (S.), CHEVALIER (R.) - Machines tournantes – Détermination des coefficients d'influence par les caractéristiques modales. - Deuxième conférence MSTDAV (Méthodes de surveillance et Techniques de diagnostic acoustiques et vibratoires), Senlis (France). Revue française de mécanique n° 1995-4, p. 277-283...