The Switch Drive Systems Oy

Tuomas Akseli Pihlaja

Panu Kurronen

Each permanent magnet module for a permanent magnet rotor includes a base-plate and a permanent magnet element attached to the base-plate. The base-plate includes a bottom section and an upper section between the bottom section and the permanent magnet element. The permanent magnet modules constitute subsets so that permanent magnet modules of different subsets differ from each other by positions of the upper sections of the base-plates with respect to the bottom sections of the base-plates so that the permanent magnet elements of the permanent magnet modules of the different subsets are axially successive and circumferentially shifted when the bottom sections of these permanent magnet modules are axially successive and circumferentially aligned. Thus, the permanent magnet elements of the permanent magnet modules can be arranged into, for example, skewed rows on a surface of the rotor.

Permanent magnet modules for an electric machine having axially and circumferentially offset permanent magnet elements, a rotor, permanent magnet electric machine, and a method for assembling thereof

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Virolahti, Finland

Tuomas Akseli Pihlaja