Toshihiko Onozawa

Title: Innovations of Toshihiko Onozawa

Introduction

Toshihiko Onozawa is a notable inventor based in Koga, Japan. He has made significant contributions to the field of electrical engineering, particularly in power control apparatuses. With a total of three patents to his name, Onozawa's work focuses on enhancing the efficiency and safety of electrical circuits.

Latest Patents

One of his latest patents is the "High speed, large-current power control apparatus." This invention is designed to protect electrical circuits from excessive current, especially during rapid current polarity transitions. The apparatus utilizes at least two switching devices arranged in series or parallel between a power supply and a load. A gate signal is generated to switch the devices from a conductive to a non-conductive state in response to excessive current detection. The signal is delayed to ensure that all switching devices are saturated before transitioning, effectively eliminating rapid current polarity transitions.

Another significant patent is the "Variable-capacitance power supply apparatus." This invention features a cost-effective structure that allows for the variable supply of high power to a load by selecting an appropriate total capacitance for charge storage. It employs a number of series-coupled capacitors, each with a specific capacitance, which are independently charged to achieve the desired output voltage. The total capacitance is calculated as Cs=C/n, where 'n' is the number of capacitors. This innovative approach enables the selective charging of capacitors to deliver the required high power efficiently.

Career Highlights

Onozawa has worked with prominent companies, including Sony and Tektronix Corporation. His experience in these organizations has allowed him to develop and refine his inventions, contributing to advancements in electrical engineering.

Collaborations

Some of his notable coworkers include Katsuhisa Kato and Tatsuya Murofushi. Their collaboration has likely fostered an environment of innovation and creativity, leading to the development of cutting-edge technologies.

Conclusion

Toshihiko Onozawa's contributions to electrical engineering through his patents demonstrate his commitment to innovation and safety in power control systems. His work continues to influence the industry and inspire future advancements.