armaturelevyn

Armaturelevy, or armature plate, refers to thin, insulated steel sheets used to form the laminated core of an armature in electric machines such as motors and generators. The laminations are stacked to create the magnetic core of the armature or stator, providing a continuous magnetic path while interrupting eddy currents. This lamination reduces core losses and overheating in alternating current and direct current machines.

The plates are made from electrical steel, typically silicon steel with high permeability and low hysteresis losses. Thicknesses usually range from about 0.2 to 0.5 millimeters, though other thicknesses are used for specific designs. The steel may be grain-oriented or non-oriented, depending on the desired magnetic properties and manufacturing considerations. To prevent current flow between laminations, each plate carries an insulating coating, such as varnish, polymer insulation, or oxide layers.

Manufacturing involves punching or laser-cutting the plates into precise shapes, sometimes forming features for teeth or slots. After coating, the sheets are stacked with insulating spacers to form the complete armature or stator core. The stack is then assembled with fasteners or clamping hardware and integrated into the machine housing.

Armature laminations are standard components in many electric machines, contributing to reduced eddy currents, improved efficiency, and controlled magnetic behavior. The term armaturelevy is used in some Scandinavian technical literature to denote these laminations that constitute the magnetic core of an armature.