Electrical machines having permanent-magnet excitation, and as a reluctance version in a laminated excitation arrangement

摘要

In order to achieve high force intensities with a favourable efficiency, a high magnetic-field intensity in the air gap has major significance. As a result of the so-called collector arrangement, relatively high air gap inductions can be achieved, with limited use of material for the permanent magnets. In order to reduce the relatively high armature reaction and the scatter, longitudinal lamination and a triangular shape of the soft-iron poles (Figure 4) are proposed. This results in an increased force intensity, a lower apparent power, less scatter and negligibly small surface losses. Furthermore, the possibility is provided for leakage-flux control, by means of which the air gap induction can be influenced. If the partial poles are magnetically conductively connected and permanent magnets are dispensed with, a highly favourable rotor arrangement results for reluctance machines. The use of a multi-phase winding and the capability for armature-field compensation by means of permanent magnets are proposed. IMAGE