Location History:
- Kusatsu, JP (1991 - 1998)
- Okamoto-cho, Kusatsu-shi, Shiga JP (2001)
- Shiga, JP (2006 - 2013)
Company Filing History:
5 out of 4,275 
1 out of 19 
2 out of 832,812 Years Active: 1991-2013
Title: Hiroyuki Yamai: Innovator in Multiphase Current Supplying Circuits
Introduction
Hiroyuki Yamai is a notable inventor based in Shiga, Japan. He has made significant contributions to the field of electrical engineering, particularly in the development of multiphase current supplying circuits. With a total of 7 patents to his name, Yamai's work has had a considerable impact on various applications, including air conditioning systems.
Latest Patents
Yamai's latest patents include innovative designs for a multiphase current supplying circuit, driving apparatus, compressor, and air conditioner. One of his inventions features a multiphase current supplying circuit that consists of a diode bridge, an intervening circuit, an inverter, a control circuit, and a lightning arrester. This circuit is designed to connect to a single-phase AC power supply system, performing full-wave rectification on the AC voltage. The intervening circuit, which includes a capacitor and an inductor, functions as a choke input type low-pass filter. The output from the diode bridge is utilized to generate a rectified voltage that is then sent to the inverter.
Another of his patents describes a multiphase current supplying circuit that incorporates a converter, an intervening circuit, an inverter, a control circuit, and a lightning arrester. In this design, the power supply system connects to the converter with the lightning arrester in between, allowing for the rectification of AC voltage. The intervening circuit features a capacitor and a bypass connected in parallel, which includes a diode, a resistor, and a capacitor arranged in series.
Career Highlights
Throughout his career, Hiroyuki Yamai has worked with prominent companies, including Daikin Industries, Ltd. His experience in these organizations has allowed him to refine his skills and contribute to significant advancements in technology.
Collaborations
Yamai has collaborated with notable colleagues such as Morimitsu Sekimoto and Taizou Kimura. Their combined expertise has fostered innovation and development in their respective fields.
Conclusion
Hiroyuki Yamai's contributions to the field of electrical engineering, particularly through his patents on multiphase current supplying circuits, demonstrate his innovative spirit and technical expertise. His work continues to influence advancements in air conditioning and electrical systems.