| 摘要 |
1. A connecting device for the beginnings and ends of windings of groups of the coils in the induction motor rotor winding of an electric motor, in which there is arranged in common grooves of a stack of stator laminations the stator winding of a two-pole universal motor, and that of an induction motor having a higher number of poles, and in whose bundle of rotor laminations there is arranged in common grooves on the one hand a universal motor winding connected to a commutator with a number of poles corresponding to that of the exciting universal motor stator field, and there is arranged on the other hand an induction motor winding electrically isolated therefrom consisting of a least two groups of coils, where the coils possess an identical width and number of coil turns and are connected in series and to short-circuiting circuits via the connecting device, which induction motor winding has a number of poles which corresponds to that of the exciting induction motor stator field during the operation of the induction motor, and has induced voltages which add up to zero during the operation of the universal motor, characterized in that preceding the winding head (5) of the induction motor winding, which head faces away from the collector (C) connected solely to the universal motor winding (10), there is arranged concentrically with the shaft (7) of the rotor a switching ring (S) which consists of electrically conductive material and which bears a number of electrically conductive hook-like attachments (switching ring hooks S1-S9) distributed over its periphery, which number corresponds at least of the number of connections which are to be established, and that the beginnings and ends of the windings of the groups of coils wound consecutively by the same winder are each fully-wound in uninterrupted fashion, intermediately contacted by a switching ring hook. |
