Insulation-coated powder magnetic core for axial gap motors (left) and powder magnetic cores for axial gap motors (right).
Insulation-coated powder magnetic core for axial gap motors (left) and powder magnetic cores for axial gap motors (right).

Sumitomo Electric Industries Ltd reports that it has developed a powder magnetic core for axial gap motors.

According to the company, axial gap motors have a lighter weight, lower thickness and higher power density when compared to conventional radial gap motors, because they have a completely different structure.

A powder magnetic core is formed by die-pressing soft magnetic iron powder into a three-dimensional shape. Compared to magnetic cores made of the electrical steel sheets used in conventional radial gap motors, it has great flexibility in terms of shape design and superior high-frequency characteristics, Sumitomo said.

However, when using a powder magnetic core for a motor, an additional component is usually required to ensure the dielectric strength between the magnetic core and the copper winding. Sumitomo has developed unique insulation coating technology that it says makes it possible to wind copper wire directly around the powder magnetic core and thereby reduce costs for additional components and assembly. This feature also makes it possible to expand the winding space, which contributes to the development of more compact and efficient motors, according to the company,

Sumitomo Electric plans to develop the market for powder magnetic cores for axial gap motors and contribute to the development of improved axial gap motors and equipment.

This story uses material from Sumitomo, with editorial changes made by Materials Today. The views expressed in this article do not necessarily represent those of Elsevier.