ABSTRACT
A synchronous machine operates at a constant speed in absolute synchronism with the line frequency. The stator is made of stacked-up electrotechnical steel laminations, and the stator slots accommodate a three-phase distributed winding that sets up a rotating magnetic field. To protect the end turns of the rotor winding against deformation under action of centrifugal forces, end turns are covered with the aid of metal sleeves. Synchronous machines with low value of short-circuit ratio show greater change in voltage with the fluctuation of load, are less stable under parallel operation and show lower charging current, when the generator is loaded only with the capacitance of the transmission line.
