Location History:
- Niiza-shi, JP (2016)
- Niiza, JP (2008 - 2017)
Company Filing History:
Years Active: 2008-2017
Title: Yoichi Terasawa: Innovator in Power Supply Technology
Introduction
Yoichi Terasawa is a notable inventor based in Niiza, Japan. He has made significant contributions to the field of power supply technology, holding a total of 3 patents. His work focuses on enhancing the efficiency and functionality of switching power-supply devices.
Latest Patents
One of Terasawa's latest inventions is a switching power-supply device. This device applies input power to a primary winding of a transformer, inducing a pulse voltage in a secondary winding. The output voltage is then rectified and smoothed by a secondary-side rectifying-and-smoothing circuit. This circuit includes a rectifier diode and a smoothing capacitor. The device features a transient state detection circuit that detects transient states and outputs a soft-drive instruction signal. Additionally, a drive circuit turns the switching element on and off in a soft-drive operation, delaying the charging speed of the gate voltage during the transition through the gate threshold voltage.
Another significant patent is a power factor correction circuit with on-period controlling. This invention includes a series circuit with a reactor and a switching element connected between the rectified-current output terminals of a rectifier. It also features a series circuit with a diode and a smoothing capacitor for obtaining an output voltage. The circuit is designed to detect the output voltage and amplify the error between the detected output voltage and a reference voltage. It includes a zero-current detector that outputs a signal when the reactor current becomes zero, along with a correction signal circuit that generates a correction signal based on the detected switching current.
Career Highlights
Yoichi Terasawa is currently employed at Sanken Electric Co., Ltd., where he continues to innovate in the field of power supply technology. His work has contributed to advancements in energy efficiency and device performance.
Collaborations
Throughout his career, Terasawa has collaborated with notable colleagues, including Shohei Osaka and Yoichi Kyono. These collaborations have fostered a creative environment that encourages innovation and the development of cutting-edge technologies.
Conclusion
Yoichi Terasawa's contributions to power supply technology through his patents and collaborations highlight his role as a significant inventor in the field. His work continues to influence advancements in energy efficiency and device performance.