The diaphragm fixation technique clamps in one operation all the elements of the rotor of an electrical machine and represents a novel and advantageous alternative to the usual gluing or shrink-fit for instance.

The principle is shown in the animation below where all the elements of the rotor, here several permanent magnets as well as the shaft, are assembled in a very efficient way by a single press-fit of the shaft.

This is obtained by applying two diaphragm technique principles:

1) The introduction of small off-sets of the apertures in the (all identical) plates and

2) The stacking of the plates in different orientations to obtain opposing off-sets

easy insertion of magnets

fixation by press-fit of shaft