Yasuhiro Tsukamoto

Title: Yasuhiro Tsukamoto: Innovator in Charging Technology

Introduction

Yasuhiro Tsukamoto is a notable inventor based in Hitachi, Japan. He has made significant contributions to the field of charging technology, holding two patents that showcase his innovative approach to power supply systems. His work has been instrumental in advancing the efficiency and functionality of charging circuits.

Latest Patents

Tsukamoto's latest patents include a charging circuit and a power supply apparatus for charging-type devices. The charging circuit comprises a main circuit for charging a battery and a power unit connected to an electric power source. The main circuit and the power unit are connected through a connector to each other. The power source transformed by a transformer located at the power unit is supplied to the connector through a contact of a direct current relay. After alternating current is introduced to the main circuit from the power unit, the alternating current is rectified by a diode bridge. The direct current from the diode bridge is supplied to the battery through a control circuit. When the battery is charged sufficiently, the control circuit outputs an instruction signal to a diode portion of a photo-triac connected between an output terminal of the diode bridge and the control relay. When the instruction signal is transmitted to the diode portion, a triac portion of the photo-triac, which is connected between one of an input terminal of the diode bridge and the connector, outputs another instruction signal to the relay located at the power unit for opening the contact through the connector. The power supply apparatus for charging-type devices includes a transformer disposed in the main body of the power supply apparatus, current supply connection terminals connected to a secondary winding of the transformer, and current receiving connection terminals capable of being coupled to and detached from the current supplying connection terminals. This innovative apparatus is designed to interrupt the current flowing through the transformer upon completion of battery charging and upon detachment of the charging-type device from the main body of the power supply apparatus.

Career Highlights

Throughout his career, Tsukamoto has worked with prominent companies such as Hitachi, Ltd. and Tagasangyo, Ltd. His experience in these organizations has allowed him to refine his skills and contribute to various projects focused on electrical engineering and power supply solutions.

Collaborations

Tsukamoto has collaborated with notable colleagues, including Kozo Tamura and Syoichi Nihira. These partnerships have fostered a creative environment that has led