Method and apparatus for permanent magnet attachment in an electromechanical machine

摘要

An apparatus and method for the installation and removal of permanent magnets in a permanent magnet electromechanical machine, for example a wind turbine power unit generator. A magnet holder is mounted on a magnet carrying structure such as a rotor. Permanent magnets may be inserted into and removed from the magnet holder after the electromechanical machine is assembled. The magnet holders define passages for airflow between the inside top and magnet surface. In this manner, permanent magnets may be installed on the magnet carrying structure and provided with additional cooling via said passages. Further, the holders may be configured to secure the magnets by an interference fit, without using bolts or adhesives, to facilitate both assembly and removal for maintenance and repair.

主权项

1. A rotor assembly in a permanent magnet electromechanical machine, comprising:
a rotor having plural magnet mounting surfaces; a plurality of magnet holders, one at each magnet mounting surface on the rotor, each magnet holder having a top inside surface; a plurality of magnets, one each retained on said magnet mounting surfaces within a magnet holder, each said magnet having a top surface opposite the magnet mounting surface; and at least one void defined between said holder top inside surface and said magnet top surface, said at least one void occupying about 90% to 100% of the space between said surfaces.