Patent ID: 6252328
Filing Date: 2001-06-26
Classification: H02K

Abstract:
An electrical machine comprising a rotor with pole zones, in which pole zones amortisseur bars designed as wedges are arranged, which amortisseur bars, on the outside of the rotor, are pushed into slots provided for this purpose and running in the longitudinal direction and are held in the slots by supporting means against the centrifugal forces occurring during rapid rotation of the rotor and which are connected to one another in an electrically conductive manner at the ends of the rotor by an amortisseur ring which encloses the rotor in an annular or ring-section-shaped manner, wherein prestressable spring elements are arranged in a distributed manner on the underside of the amortisseur bars, which spring elements, in the prestressed state, enable the amortisseur bars to be pushed into the slots without hindrance and, after the prestressing has been removed, press the amortisseur bars against the supporting means and at the ends of the rotor against the amortisseur ring, andwherein each spring element has a clamping sleeve with an internal thread, which clamping sleeve reaches into the associated through-hole in the amortisseur bar and thus fixes the spring element to the amortisseur bar, and by means of which clamping sleeve the spring element can be pressed against the underside of the amortisseur bar against the spring force and can thus be prestressed.