Company Filing History:
Years Active: 2004
Title: Yuichi Izawa: Innovator in Compressor Control Technology
Introduction
Yuichi Izawa is a notable inventor based in Gunma-ken, Japan. He has made significant contributions to the field of compressor control technology, holding 2 patents that showcase his innovative approach to engineering challenges.
Latest Patents
One of his latest patents is a controlling device of a compressor. This device features a noise filter arranged at the input of the inverter circuit, which converts commercial frequency to a driving frequency for controlling a motor that drives the compressor mechanism. The design effectively suppresses common mode noise from both the commercial power source and the inverter circuit. The noise filter comprises coils connected between first and second capacitors, which are arranged in series between the AC power lines. Additionally, a clamper is connected between nodes of the second capacitors and the metal frame, which helps in clamping voltage and includes a third capacitor connected in parallel. This innovative structure reduces leakage current and suppresses the increase of noise terminal voltage, meeting legal regulation requirements even when using new refrigerants like R410A.
Another significant patent by Izawa is an inverter protecting apparatus designed to safeguard the inverter against overcurrent. This apparatus consists of multiple switching devices connected between the positive and negative terminals of a DC power source. It includes several detecting devices that convert currents passing through the switching devices into voltages, generating detection outputs. The system also features amplifier circuits and comparing devices that supply detection outputs to the amplifiers, generating an abnormality output if the detection output exceeds a predetermined value. If any comparing device issues an abnormality output, the protecting device interrupts the drive of all switching devices, ensuring safety and reliability.
Career Highlights
Yuichi Izawa is currently employed at Sanyo Electric Co., Ltd., where he continues to innovate and develop advanced technologies in the field of electrical engineering. His work has significantly impacted the efficiency and safety of compressor systems.
Collaborations
Izawa has collaborated with notable colleagues, including Hideaki Kato and Tetsuo Nomoto, contributing to various projects that enhance the functionality and reliability of electrical devices.
Conclusion
Yuichi Izawa's contributions to compressor control technology through his innovative patents demonstrate his expertise and commitment to advancing engineering solutions. His work not only addresses current challenges but also sets a foundation for future developments in the industry.