Company Filing History:
Years Active: 2009-2015
Title: The Innovations of Yoshio Akaishi
Introduction
Yoshio Akaishi is a notable inventor based in Hitachinaka, Japan. He has made significant contributions to the field of electrical drive control systems, holding a total of 6 patents. His work focuses on enhancing the efficiency and safety of inverter drive devices.
Latest Patents
One of his latest patents is an inverter drive device that includes a drive circuit capable of outputting a gate voltage signal for a power semiconductor element. This device features a Zener clamping protection circuit that monitors the emitter electrode side voltage of the power semiconductor element. If this voltage exceeds a predetermined value, the circuit clamps the gate voltage after a specific time interval. The Zener clamping protection circuit also incorporates a latch circuit that maintains the clamping of the gate voltage during the interval.
Another significant patent is an overcurrent fault detection device designed for electrical drive control systems. This device includes an inverter that converts DC current to three-phase AC currents for motor operation. It features a DC voltage detector, phase current detectors, and a rotational position detector that monitors the motor's rotational angle. The control circuit manages the gate drive circuit based on phase current values and motor rotational angle detection. A first decision-making circuit detects overcurrent by analyzing phase current values at predetermined cycles, ensuring the system operates safely.
Career Highlights
Yoshio Akaishi has worked with prominent companies such as Hitachi Automotive Systems and Hitachi, Ltd. His experience in these organizations has allowed him to develop innovative solutions that address complex challenges in electrical engineering.
Collaborations
Throughout his career, Yoshio has collaborated with talented individuals, including Koichi Yahata and Yasuo Noto. These partnerships have contributed to the advancement of technology in their respective fields.
Conclusion
Yoshio Akaishi's contributions to inverter drive devices and overcurrent fault detection systems highlight his innovative spirit and dedication to improving electrical drive control technology. His work continues to influence the industry and inspire future advancements.
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.