Seiki Kodama

Title: Seiki Kodama: Innovator in Resolver Technology

Introduction

Seiki Kodama, a distinguished inventor based in Himeji, Japan, has made significant contributions to the field of motor technology. With a portfolio of 16 patents, Kodama has established himself as a prominent figure in innovation, particularly known for his advancements in resolver technology.

Latest Patents

Among his latest innovations is the "Resolver Reference Position Adjustment Method". This method addresses the challenge of minimizing detection errors in the rotation angle of a motor's rotor. The ingenious process involves adjusting the reference position of a resolver mounted on the end of a shaft connected to the rotor by measuring the rotor’s rotation angles at two distinct points. These points are strategically chosen to be mechanical angles apart, allowing for more precise detection and correction of any errors. Furthermore, the resolver he developed is capable of making accurate angle detections across its entire operating range. This device consists of a resolver stator with an excitation winding and two output windings, along with a rotor that alters the gap permeance based on its rotation. A detection error correction mechanism enhances the resolver’s accuracy by analyzing Lissajous waveforms generated from the output signals.

Career Highlights

During his career, Seiki Kodama worked at renowned companies, notably Mitsubishi Denki Kabushiki Kaisha and Mitsubishi Denki K.K. His work in these institutions allowed him to deepen his expertise in technology and contribute to significant advancements in motor control systems.

Collaborations

Throughout his professional journey, Kodama collaborated with notable colleagues such as Shigemi Murata and Toshio Iwata. These partnerships fostered a creative environment that encouraged innovation and the exchange of ideas, ultimately leading to the development of impactful technologies.

Conclusion

Seiki Kodama’s contributions to resolver technology have paved the way for advancements in the accuracy and reliability of motor systems. With a foundation built on solid principles and persistent innovation, he continues to inspire future inventors in the realm of technology. As the industry evolves, his patents will undoubtedly remain a significant part of the technological landscape.