Kimitada Ishikawa

Title: Kimitada Ishikawa: Innovator in Over-Current Protection Devices

Introduction

Kimitada Ishikawa, a dedicated inventor based in Saitama, Japan, has made significant contributions to the field of electrical engineering. With a portfolio of eight patents, Ishikawa specializes in innovative solutions to over-current protection, ensuring the safety and efficiency of electrical systems.

Latest Patents

Kimitada Ishikawa's latest patents include two notable inventions aimed at enhancing over-current protection devices. The first patent describes an over-current protection device that consists of a current detection unit which detects current from a power supply to a load utilizing a magnetism detection element equipped with a magnetic impedance (MI) effect. This sophisticated device includes an AC-current supply device to provide AC current to the detection element, a bias-current supply device for a bias coil, and a peak detection device that determines the peak impedance variation as a voltage. Notably, the inclusion of both a holding device for managing switch outputs and an amplifier in the current detection unit allows for an expanded detection range, reducing power consumption and cost.

The second patent highlights an overload current protection device designed to prevent damage to loads, such as motors, by cutting off power through a contactor during overload situations. By employing a magnetic impedance element as a current detection unit, this device eliminates the magnetic saturation issues present in conventional current transformers. The result is a cost-effective overload current protection device capable of providing a wide current detection range.

Career Highlights

Kimitada Ishikawa currently works for Fuji Electric Co., Ltd, where he has been instrumental in developing advanced electrical solutions that drive safety and efficiency in electrical applications. His focus on over-current protection devices showcases his commitment to innovation in the electrical engineering domain.

Collaborations

Throughout his career, Ishikawa has worked alongside talented colleagues such as Takahiro Kudo and Yujiro Kitaide. Their collaborative efforts have contributed to the successful development of various patented technologies, underscoring the importance of teamwork in achieving groundbreaking innovations in the field.

Conclusion

Kimitada Ishikawa stands out as a pivotal figure in the realm of electrical engineering, particularly through his work on over-current protection devices. His inventive solutions not only advance technology at Fuji Electric Co., Ltd but also emphasize the necessity for safety and efficiency in modern electrical systems. Continuing to innovate, Ishikawa’s contributions will likely pave the way for further advancements in the industry.