Abstract: The recognition of a polyphase machine (1) connected to a converter (10) is suggested in order to adapt the converter (10) to the connected machine (1) prior to an active productive operation. The following is arranged for. Connecting of the polyphase machine with its several electric phases to the converter (10). Supplying of at least a first and a second test signal from the converter (10) to at least one of the several electric phases of the connected machine. Measuring of at least two causal sequences of the test signals. Evaluating of the measuring result to obtain measuring values (r1, r2) and allocating of these measuring values to a comparison function (60, 50). Comparing of the comparison function with a reference function (6a, 60b, 50a, 50b) which represents one type of a polyphase machine.

Abstract: A stator for an electric rotating-field induction generator that is much simpler to produce, especially regarding its windings, includes main and auxiliary poles projecting inward pressed or otherwise disposed radially onto the inner side of a yoke and positioned alternately about the circumference, of which the auxiliary poles are not wound, and the main poles are each surrounded by a coil. Each of the wound poles has a groove in the direction of the longitudinal side parallel to the axis along its longitudinal sides to accept coil sections, and these grooves include a trapezoidal cross-section and are enclosed by the non-wound auxiliary poles at the longitudinal-side groove opening.