Akihiro Nakajima

Title: Akihiro Nakajima: Innovator in Electric Motor Technology

Introduction

Akihiro Nakajima is a prominent inventor based in Yokohama, Kanagawa, Japan. He has made significant contributions to the field of electric motor technology, holding a total of 3 patents. His innovative work focuses on improving the efficiency and performance of direct-current motors and semiconductor electric motors.

Latest Patents

One of Nakajima's latest patents is an "Apparatus for removing torque ripples in direct-current motors." This apparatus includes a permanent magnet rotor, position sensors, stator armature coils, an operational circuit for arithmetic operations on detected signals, and a control circuit for driving the stator armature coils. Another embodiment of this invention features a direct-current motor with Y-connected armature coils, a detector for counterelectromotive forces, and a transistor for driving the motor.

Additionally, he has developed a "Semiconductor electric motor having a rotary transformer to excite." This innovative motor comprises an outer housing, a cylindrical magnetic core, polyphase armature coils, and a rotative shaft. The design includes exciting coils that polarize the rotor's surface and a rotary transformer that enhances the motor's efficiency.

Career Highlights

Throughout his career, Nakajima has demonstrated a commitment to advancing electric motor technology. His inventions have contributed to the development of more efficient and reliable motors, which are essential in various applications.

Collaborations

Nakajima has worked alongside his coworker, Itsuki Ban, to further enhance their research and development efforts in the field of electric motors.

Conclusion

Akihiro Nakajima's innovative contributions to electric motor technology have positioned him as a key figure in the industry. His patents reflect a deep understanding of motor mechanics and a dedication to improving performance and efficiency.