Keita Kume

Title: Keita Kume and Soft Magnetic Alloy Powder

Introduction

Keita Kume is an inventor associated with Fukushima, Japan, and Mitsubishi Steel Mfg. Co., Ltd. His patent work addresses soft magnetic alloy powder for use in dust cores, with the aim of reducing magnetic loss and supporting higher frequencies and larger currents.

Latest Patents

The provided information lists one patent associated with Kume: “Soft Magnetic Alloy Powder and Production Method Therefor.” It describes an Fe–Cr–Si-based alloy powder in which the chromium content gradually decreases from the particle surface to a specified depth. The powder contains 3–6.5% silicon by weight and may contain 1–5% chromium by weight, along with optional manganese, phosphorus, sulfur, or oxygen. The chromium-oxide-to-metallic-chromium ratio may also gradually decrease with depth from the surface. These compositional and surface characteristics are intended to reduce losses in dust-core applications and help the material operate at higher frequencies and larger currents. Kume is credited with 1 patent in the information provided.

Career Highlights

Kume’s listed patent connects his inventive work with Mitsubishi Steel Mfg. Co., Ltd. and focuses on the composition and production of soft magnetic alloy powder. The available information does not provide further details about his career or other inventions.

Collaborations

Tetsuji Shiseki is identified as Kume’s coworker. The provided information does not specify whether Shiseki was a co-inventor or describe his role in the patent.

Conclusion

Keita Kume’s listed patent presents a surface-composition approach to soft magnetic alloy powder designed to reduce losses in dust cores and support demanding operating conditions.