Affiliations: Department of Electrical Engineering, Doshisha University, Kyoto, Japan
Correspondence:
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Corresponding author: Yasuhito Takahashi, Department of Electrical Engineering, Doshisha University, Kyoto 610-0321, Japan. E-mail:ytakahashi@mail.doshisha.ac.jp
Abstract: Evaluating magnetic properties accurately under various
flux conditions is necessary to reduce iron losses in designing motors and
transformers. Particularly, two-dimensional (2-D) magnetic property is one
of the most important factors for highly efficient electrical machines. In
order to evaluate 2-D magnetic properties of electrical steel sheets,
several types of 2-D single sheet testers (2-D SSTs) have been proposed. The
structure of magnetizing yoke and coils in a 2-D SST is more complex than an
SST for measuring one-dimensional (1-D) magnetic properties of electrical
steel sheets (1-D SST). Therefore, leakage inductance of a 2-D SST is
generally much larger than that of a 1-D SST, which results in the fact that
it is very difficult to measure magnetic properties up to high flux density
region with a 2-D SST. In this paper, a round rotational 2-D SST (RRSST) is
developed based on motor stator core. The RRSST is compared with the 2-D SST
using a square specimen (SRSST) from the standpoint of 2-D magnetic
measurement in high flux density region under rotational and alternating
flux conditions.
Keywords: 2-D magnetic properties, rotational single sheet tester, stator of motor
