Tadao Nozawa

Title: Tadao Nozawa: Innovator in Electrical Steel Technology

Introduction

Tadao Nozawa is a prominent inventor based in Kitakyushu, Japan. He has made significant contributions to the field of electrical steel technology, holding a total of 5 patents. His work focuses on developing materials that enhance the efficiency and performance of electrical components.

Latest Patents

One of Nozawa's latest patents is for a very thin electrical steel strip that boasts low core loss and high magnetic properties. This innovative strip has a thickness not exceeding 150 microns and features a high degree of {110} <001> grain orientation. It achieves a normalized magnetic flux density, expressed by a B.sub.8 /B.sub.s value greater than 0.9, while maintaining a low core loss not exceeding 50% of conventional products. The manufacturing process involves using a grain-oriented electrical steel strip with a silicon content of no more than 8%, primarily composed of iron. The material undergoes cold rolling with a reduction of 60 to 80% and is subsequently annealed for primary recrystallization. Additionally, the inclusion of tin and antimony in the starting material further enhances the product's properties.

Another notable patent involves a process for preparing a wound core that exhibits low core loss. This invention ensures that the core maintains its low loss characteristics even after stress-relief annealing. The process includes fabricating a very thin silicon steel strip with a silicon content of 6.5% or less and a thickness of 100 microns or less. The wound core is subjected to stress-relief annealing, and a linear or dotted local strain is introduced into the strip before rewinding it onto the core.

Career Highlights

Tadao Nozawa is associated with Nippon Steel Corporation, where he has been instrumental in advancing electrical steel technologies. His innovative approaches have positioned him as a key figure in the industry, contributing to the development of high-performance materials.

Collaborations

Nozawa has collaborated with notable colleagues, including Tadashi Nakayama and Yoshiyuki Ushigami. Their combined expertise has further propelled advancements in electrical steel technology.

Conclusion

Tadao Nozawa's contributions to electrical steel technology through his patents and collaborations highlight his role as an influential inventor. His work continues to impact the efficiency