Motor Core Having Separately Processed Rotor and Stator Laminations

摘要

Methods for forming a motor core having separately processed stator and rotor laminations are disclosed. The stator and rotor laminations may be formed from a single electrical steel source, such as a sheet or coil. The methods may include forming and heat treating a first portion of the steel source to form stator laminations having a first microstructure (e.g., mean grain size) and magnetic and mechanical properties (e.g., core loss). They may further include forming and heat treating a second portion of the steel source to form rotor laminations having a second microstructure that is different from the first and magnetic and mechanical properties that are different from the stator laminations. The stator laminations may have improved core loss and permeability performance and the rotor laminations may have improved mechanical properties. By separating the processing, each core may have properties tailored to conditions that they will experience in operation.

主权项

1. A method for forming a motor core from a single electrical steel source, comprising:
forming and heat-treating a first portion of the steel source to form stator laminations having a first mean grain size and core loss; and forming and heat-treating a second portion of the steel source to form rotor laminations having a second mean grain size that is less than the first and a second core loss that is greater than the first.