Rotatable electrical machine

Abstract

Abstract 1. A rotary electric machine comprising a first functional member (2) and a second functional member (10), one of the two functional members (10) being rotatable with respect to the other functional member (2), and an air gap existing between the two surfaces facing each other of the two functional members (2, 10), and comprising the following features in combination : (a) one of the two functional members (10) comprises a multiplicity of permanent magnet poles (14) of alternating polarity distributed in a ring arrangement at its side facing the air gap ; (b) the permanent magnet poles (14) are provided by permanent magnets (12) having a coefficient of permeability in the order of the permeability of air (mu r = 1) ; (c) the other one of the two functional members (2) comprises a multiplicity of electromagnet poles (8) distributed in a ring arrangement at its side facing the air gap, and having switchable electromagnet pole windings (6; E1 ; E2 ), ; (d) the electromagnet poles (8) are provided with individually associated electromagnet pole windings (6; E1 ; E2 ) ; (e) for switching the electromagnet pole windings (6; E1 ; E2 ) in the respective proper direction of current for the duration of a suitable relative functional position with respect to permanent magnet poles (14), there is provided a plurality of electronic switching means (16) each switching a partial number of electromagnet pole windings (6; E1 ; E2 ) and being sensor-controlled by detection of the rotational relative position of the two functional members (2, 10) ; (f) the electronic switching means (16) are constructed with four controllable semiconductor switching elements (T1, T2, T3, T4) disposed in bridge circuit arrangement.

Inventors

• 👤 Götz Dipl.-Phys. Heidelberg

Bibliographic Details