Takahiko Sano

Title: The Innovations of Takahiko Sano

Introduction

Takahiko Sano is a notable inventor based in Hitachi, Japan. He has made significant contributions to the field of rotating machinery, holding a total of 5 patents. His work focuses on enhancing the efficiency and performance of electric machines.

Latest Patents

One of his latest patents involves a rotating machinery design that optimizes armature windings. In this design, when the armature winding consists of four layers, the step number of the strands is halved compared to two layers. This innovation facilitates the manufacturing of an armature winding with a 540-degree transposition, which elongates the transposition pitch and reduces circulating current loss. However, to maintain the voltage limit value due to isolation resisting force, one layer of armature windings is constructed with sub windings separated into at least two vertical layers. Each sub winding is independently transposed and connected to the armature windings of other slots while ensuring isolation at the armature winding end region through at least two connecting methods. This configuration allows the sub windings to form a parallel circuit with the armature windings across multiple slots.

Another significant patent pertains to the stator of a rotating electric machine. In conventional designs, achieving appropriate circumferential and radial stiffnesses for elastic bars supporting the stator core has been challenging. Sano's innovation addresses this issue by altering the sectional shape of the elastic support bars to rectangular, elliptic, or rhombic forms. This adjustment allows for a change in the ratio between circumferential and radial stiffness, improving torque transmission and vibration prevention.

Career Highlights

Takahiko Sano has worked with prominent companies such as Hitachi, Ltd. and Mitsubishi Hitachi Power Systems, Ltd. His experience in these organizations has contributed to his expertise in the field of electric machinery.

Collaborations

Throughout his career, Sano has collaborated with notable coworkers, including Hideaki Nagashima and Ryoichi Shiobara. These partnerships have likely enriched his work and led to further innovations in the industry.

Conclusion

Takahiko Sano's contributions to the field of rotating machinery demonstrate his commitment to innovation and efficiency. His patents reflect a deep understanding of electrical engineering principles and a drive to improve existing technologies.