Permanent magnet arrangement for an electrical machine

摘要

A permanent magnet arrangement (10) for an electrical machine comprises a support structure (12) for carrying magnetic flux and a pole assembly (14) fixed to the support structure (12). The pole assembly (14) comprises a magnet pole (18) comprising at least one piece of permanent magnet material (20) and a magnet carrier (16) on which the magnet pole (18) is mounted and which provides a magnetic flux path between the magnet pole (18) and the support structure (12). The permanent magnet arrangement (10) further comprises a sleeve (24) containing the magnet pole (18) and at least part of the magnet carrier (16). The magnet carrier (16) is secured to the support structure (12) to fix the pole assembly (14) to the support structure (12) and the sleeve (24) is clamped to the support structure (12) by the magnet carrier (16). A method for assembling the permanent magnet arrangement (10) is also described.