Location History:
- Chiyoda-ku, JP (2014 - 2020)
- Tokyo, JP (2017 - 2024)
Company Filing History:
36 out of 15,844 
1 out of 19 Years Active: 2014-2025
Title: Innovations of Yu Hirotani: A Pioneer in Rotary Electric Machine Technology
Introduction: Yu Hirotani, based in Tokyo, Japan, is an accomplished inventor known for his significant contributions to the field of rotary electric machines. With an impressive portfolio of 35 patents, Hirotani has continually advanced the technology surrounding these devices, focusing on reducing torque ripple and enhancing performance.
Latest Patents: One of Hirotani's notable patents is the "Rotary Electric Machine Apparatus." This invention aims to provide a rotary electric machine that can effectively perform current control to reduce torque ripple components. It utilizes a permanent magnet rotor with a skew structure that shifts the magnetic pole position circumferentially at different axial positions. The rotary electric machine apparatus increases the efficacy of controlling current vectors as the winding currents rise.
Another of his significant contributions is the "Control Apparatus for AC Rotary Machine and Electric Power Steering Apparatus." This patent addresses the reduction of error components in current detection values, particularly close to the mechanical resonance period of AC rotary machines. It involves detecting currents in three-phase windings and calculating voltage command values based on processed current detection values.
Career Highlights: Yu Hirotani has had a valuable career, marked by his tenure at Mitsubishi Electric Corporation. His work there has propelled advancements in electrical machine technology, cementing his reputation as an innovator in the field.
Collaborations: Hirotani has collaborated with other distinguished professionals in his field, including Yuji Takizawa and Satoru Akutsu. Working alongside such talented individuals has further enhanced the scope and impact of his inventions.
Conclusion: Yu Hirotani stands out as a leading inventor in rotary electric machine technology. With his innovative patents and collaborations, he continues to contribute significantly to the advancement of electrical engineering. His work not only influences current technological standards but also paves the way for future innovations in the industry.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.