Brushless direct-current motor having currentless stoppage

Abstract

The invention relates to a brushless direct-current motor (1), comprising a stator (2), a rotor cup (30) that revolves around the stator (2) and has a plurality of permanent-magnet poles (N, S), and a detent torque plate (4) that is connected to the stator (2) and has several pole shoes (41) for generating a detent torque that brings the revolving rotor cup (30) into a detent position. The pole shoes (41) are each arranged in the detent position between two adjacent poles (N, S) of the revolving rotor cup (30) to form a magnetic short circuit. The detent torque plate (4) is arranged substantially outside of the magnetic rotating field produced by the stator (2) during operation, whereby the production of the detet torque is decoupled from the electrical behavior of the brushless direct-current motor (1) and the power of the brushless direct-current motor (1) is not substantially influenced by the presence of the detent torque plate (4).

Dependencies are inferred from the claim text.