Yoshitaka Kumeda

Title: Innovations of Yoshitaka Kumeda in Resistance Alloys

Introduction

Yoshitaka Kumeda is a notable inventor based in Nagano, Japan. He has made significant contributions to the field of resistance alloys, particularly in the development of shunt resistors. With a total of three patents to his name, Kumeda's work focuses on enhancing the performance of current detection devices.

Latest Patents

Kumeda's latest patents include innovative designs for resistance alloys used in shunt resistors. His patents are titled "Resistance alloy for use in shunt resistor," "Use of resistance alloy in shunt resistor," and "Shunt resistor using resistance alloy." These inventions provide a current detection resistor that achieves low specific resistance and a small thermal electromotive force with respect to copper, while maintaining a low temperature coefficient of resistance (TCR). The resistance alloy comprises 4.5 to 5.5 mass % of manganese, 0.05 to 0.30 mass % of silicon, 0.10 to 0.30 mass % of iron, with the balance being copper, and has a specific resistance of 15 to 25 μΩ·m. Additionally, his work on a copper-manganese based resistance alloy includes tin and nickel, achieving a TCR less than or equal to −36×10/K at 100° C. with reference to 25° C.

Career Highlights

Kumeda is currently employed at Koa Corporation, where he continues to innovate in the field of electrical components. His expertise in resistance alloys has positioned him as a key figure in the development of advanced shunt resistors.

Collaborations

Some of his notable coworkers include Tadahiko Yoshioka and Reina Kaneko, who contribute to the collaborative efforts in research and development at Koa Corporation.

Conclusion

Yoshitaka Kumeda's contributions to resistance alloys and shunt resistors demonstrate his commitment to innovation in electrical engineering. His patents reflect a deep understanding of materials science and their applications in current detection technology.