Location History:
- Chiyoda-ku, JP (2012 - 2023)
- Tokyo, JP (2019 - 2023)
Company Filing History:
7 out of 15,906 
1 out of 31 
Years Active: 2012-2023
Title: Kei Hayase: Innovator in Electrical Power Conversion
Introduction
Kei Hayase is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of electrical power conversion, holding a total of 8 patents. His innovative designs focus on enhancing the efficiency and compactness of power conversion devices.
Latest Patents
One of Hayase's latest patents is an electrical power conversion apparatus. This apparatus features devices constituting a DC/DC converter that do not require large sizes, allowing for a smaller DC capacitor connected between an AC/DC converter and the DC/DC converter. The control circuit of this apparatus generates an output current instruction for the DC/DC converter by superimposing an alternating current instruction on a direct current instruction. It also determines the amplitude of the alternating current instruction based on temperature information from a DC-capacitor's temperature acquisition means.
Another notable patent is a power conversion device that minimizes footprint. This device includes a circuit board with wirings and multiple semiconductor switching elements mounted on it. A driver circuit operates at least two of these semiconductor switching elements together. The design ensures that the semiconductor switching elements are packaged in a way that shortens the inter-control-terminal distance, enhancing the overall efficiency of the device.
Career Highlights
Hayase has worked with Mitsubishi Electric Corporation, where he has honed his skills in electrical engineering and innovation. His experience at this esteemed company has allowed him to develop groundbreaking technologies in power conversion.
Collaborations
Throughout his career, Hayase has collaborated with notable colleagues such as Takaaki Takahara and Hiroto Mizutani. These collaborations have contributed to the advancement of his projects and innovations.
Conclusion
Kei Hayase is a distinguished inventor whose work in electrical power conversion has led to significant advancements in the field. His innovative patents reflect his commitment to improving efficiency and reducing the size of power conversion devices.