The Influence of Cutting Technology on Magnetic Properties of Non-Oriented Electrical Steel—Review State of the Art

The global drive to reduce energy consumption poses new challenges for designers of electrical machines. Losses in the core are a significant part losses, especially machines operating at an increased rotational speed powered by PWM inverters. One important problems when calculating losses is considering effect material degradation due mechanical or laser cutting. To this aim, paper analyzes and summarizes knowledge about sources property deterioration ways describing phenomenon. cited results tests indicate lack unequivocal relationships allowing us estimate degree damage resulting properties. main task article present state on possibility taking into account impact cutting sheets electric motors their efficiency machine. This problem need design manufacture energy-saving with voltage 20 350 Hz, whose magnetic cores made laminates. However, performed analysis indicates most parameters process, affecting structure destruction. method solution proposed authors punching cutting, illustrated practical example, also presented.