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
Reasons to use diaphragm assembly of rotors:
Animation of the rotor-assembly