Interlamination Insulation

Interlamination insulation is a critical component in electric motor stator lamination stacks, consisting of thin insulating coatings or films applied between individual steel laminations. Its primary function is to electrically isolate each lamination to prevent the formation of circulating eddy currents within the stator core, which would otherwise cause significant energy losses, heat generation, and reduced motor efficiency. This insulation ensures optimal magnetic flux distribution while maintaining structural integrity under thermal and mechanical stresses during motor operation.

Works by creating a high-resistance barrier between conductive steel laminations, blocking the path for eddy currents induced by alternating magnetic fields. This minimizes core losses (hysteresis and eddy current losses) and improves motor efficiency by allowing magnetic flux to pass through while preventing electrical conduction between layers.