Permanent magnet rotor and corresponding manufacturing method

摘要

A rotor for motor or generator and comprising magnets and a method of mounting magnets in such rotor is described. The magnets are embedded in the rotor while maintaining the mounting position in a way quite similar to the mounting position of surface-mounted magnets. <??>Pos. 1 is the punched rotor plate with a central hole for the shaft. Pos. 2 is a hole stamped for the magnet. Three rows of magnets in each of the poles on an 8-pole machine, is disclosed. The sides of the magnet recesses are drawn as 2 mm, and the top, facing the air gap, as having a 3 mm thickness at the sides. Pos. 3 is a ventilation hole that forms a large air passage when the rotor is stacked. Pos. 4 is the area between the poles. Here we would need to place a non-magnetic non-conduction material if we used surface-mounting and bandaging. Now we can just leave it as air. It will serve to provide a large air passage through the air gap to improve cooling of both the rotor and the stator. <IMAGE>