Method for manufacturing an armature for an EC motor

A method for manufacturing an armature for an EC motor, the method comprising:

• providing an armature shaft;
• providing an armature core having pockets for accommodating at least one permanent magnet;
• providing a balance ring on at least one axial end of the armature core;
• fixing the permanent magnet in a pocket of the armature core;
• placing the balance ring on an end of the armature core;
• inserting the armature shaft, the armature core, and the at least one balance ring into a casting mold centered relative to each other, such that the balance ring abuts the axial end of the armature core;
• closing the casting mold;
• feeding casting compound under pressure into a gap between the armature core and the pocket having the permanent magnet via a sprue in the form of a gap between the balance ring and the armature shaft;
• curing the casting compound;
• and
• removing the armature from the casting mold.