Reduction of Iron Loss on Divided Ring-Shaped Core Made by Grain-Oriented Electrical Steel Sheet Using Vector Magnetic Characteristic Control Technology

Abstract

　The authors have developed vector magnetic property control technology, which is a technology for reducing iron loss of grain-oriented electrical steel sheets. This technology can reduce iron loss caused by rotating magnetic flux and alternating magnetic flux in arbitrary directions. The purpose of this research is to apply this technology to a divided stator motor core using grain-oriented electrical steel sheets to reduce iron loss. In this paper, as a first step, we report the results of applying the technology to a divided ring-shaped magnetic core. Undivided, 2-divided, and 4-divided samples were prepared. For each sample, the application area of the technology was examined using the electromagnetic field analysis method. Each sample was manufactured using a wire electric discharge machine. By measuring and comparing the magnetic properties before and after applying the technology, it was confirmed that the vector magnetic property control technology reduced iron loss.