Electric machine, in particular separately excited synchronous machine

Abstract

The invention relates to an electric machine, in particular a separately excited synchronous machine, comprising: a rotor shaft (5) having at least one slip ring (4); and at least one electrically conductive contact element (6), in particular a carbon brush, resting on the slip ring (4), which is received in a channel-like guide (8) formed in the housing (2, 36) and extending radially with respect to the rotor shaft (5) and is tensioned radially with respect to the slip ring (4) by means of a spring element (10), a roller (22) is provided which is tensioned laterally relative to the contact element (6) by means of a further spring element (20), by means of which roller the contact element (6) is tensioned relative to the wall (19) of the guide (8).

Description

technical field [0001] The invention relates to a motor, in particular to a separately excited synchronous motor. Background technique [0002] Electric machines are known in different designs. In the case of many types of electric machines, it is necessary to contact rotating components, in particular the rotor or the rotor shaft, in order to conduct current to the individual conductor windings to form a magnetic field, or to capture measurement signals, for example, from such rotating components. An example of such a machine is a separately excited synchronous machine. Such an electric machine has a rotor with a rotor shaft on which at least one, but usually a plurality of slip rings corresponding to the number of individual phases are arranged, which slip rings are coupled to the individual coil windings and, when the windings are energized, through The coil windings form the excitation magnetic field. In order to be able to supply current to the individual windings, t...

AI Technical Summary

Problems solved by technology

If the axial tension is too weak, the arrangement is too prone to vibration due to too low a pressing force

Excessive wear if the axial pressing force is too strong

If the lateral pressing force is too low, this lateral tensioning will not serve its purpose, since tilting or wobbling can still occur with stronger excitation

If the contact force is too high, the surface of the contact element is pressed against the guide wall too much, so that increased friction and possible insufficient axial tensioning or guiding

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