Excitation winding arrangement for a synchronous electric machine
AssigneeSiemens Aktiengesellschaft
InventorsRudolf Von Musil, Ingolf Schmidt, Franz Spirk
Life of this patent
Estimating the term…
Abstract
An excitation winding arrangement is provided for low-speed synchronous machines wherein the poles are configured without pole shoes and accommodate the excitation windings. The excitation winding arrangement includes coils of flat conductors which define the excitation windings. The flat conductors are wound so that their surfaces are parallel to the walls of the poles and the coils form a self-supporting component which can be improved by hardened turn insulation. These coils are secured only at the end-faces of the poles by a mounting arrangement. Effective cooling of the coils in the pole gap is thereby achieved.
Claims8
In an electric synchronous machine operable at low rotational speed equipped with a rotor having salient, shoeless poles for accommodating the excitation winding of an excitation winding arrangement thereon, each two mutually adjacent ones of the poles defining a pole gap therebetween through which air flows when the rotor rotates, the excitation winding arrangement comprising:
- at least one coil defining the excitation winding at a given pole, each of said coils being wound from a flat conductor with the flat sides thereof extending parallel to the walls of the pole whereby a coil of sufficient stiffness is obtained to constitute a self-supporting component, each of said coils having only turns insulation for electrically insulating the turns one from the other;
- and, mounting means connected at the end-faces of the rotor for holding said coils only at said end-faces and for supporting said coils in surrounding spaced relation to the poles, thereby completely exposing the exterior surfaces of said coils to the air flowing in the pole gaps.
Dependencies are inferred from the claim text.