Keiji Nakamura

Title: Keiji Nakamura: Innovator in Sliding Contact Materials

Introduction

Keiji Nakamura is a prominent inventor based in Chiba, Japan. He has made significant contributions to the field of materials science, particularly in the development of sliding contact materials for electric motors. With a total of 9 patents to his name, Nakamura's work has been instrumental in enhancing the performance and durability of motor components.

Latest Patents

Nakamura's latest patents include innovations such as a sliding contact material, clad composite material, and motor components. One of the key problems he addresses is the need for a highly wear-resistant and durable sliding contact material applicable to a commutator of a motor used for high-capacity applications, where the initial starting current is 1 ampere or higher. His solution involves a sliding contact material in which metal oxide particles are dispersed in an Ag alloy matrix. This matrix contains specific percentages of various metals, ensuring optimal performance and longevity.

Another notable invention is a commutator material for small electric DC motors, designed to extend the operating life of spindle motors for DVDs controlled using pulse currents. This material is characterized by its unique composition, which includes copper and zinc oxide particles dispersed in an AgCu matrix. Additionally, he has developed brush materials for small electric DC motors, showcasing his versatility and expertise in the field.

Career Highlights

Throughout his career, Keiji Nakamura has worked with notable companies such as Tanaka Kikinzoku Kogyo K.K. and Mabuchi Motor Co., Ltd. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking innovations in motor technology.

Collaborations

Nakamura has collaborated with esteemed colleagues, including Toshiya Yamamoto and Takao Asada. These partnerships have fostered a creative environment that has led to the development of advanced materials and technologies.

Conclusion

Keiji Nakamura's contributions to the field of sliding contact materials and motor technology have established him as a leading inventor in his domain. His innovative solutions continue to impact the industry positively, ensuring enhanced performance and durability in electric motors.