Location History:
- Kawasaki, JP (1996)
- Mie, JP (2002 - 2009)
- Tokyo, JP (1997 - 2018)
- Suzuka, JP (2010 - 2020)
Company Filing History:
17 out of 4,811 
1 out of 116 
1 out of 151 
Years Active: 1996-2020
Title: **Innovations by Hirokazu Tajima: A Visionary Inventor from Suzuka, Japan**
Introduction
Hirokazu Tajima is a prominent inventor based in Suzuka, Japan, known for his significant contributions to the field of engineering. With a total of 19 patents to his name, Tajima has made remarkable advancements in technology, particularly in the area of electric motor control and power conversion.
Latest Patents
Among his latest innovations are two notable patents: the "Charger with Inverter" and the "Controller for AC Electric Motor". The "Charger with Inverter" is a high-speed charger designed to have a long lifespan. This invention ensures that a power converting inverter can be reliably stopped without causing any malfunctions, based on a forced stop signal. The design includes pulse transformers that correspond to switching elements, along with a control circuit that effectively manages gate signals for these elements. This innovation shows his commitment to enhancing reliability in power systems.
The "Controller for AC Electric Motor" features an acquirer that gathers essential data, including the frequency of the output voltage of a power converter and the estimated rotational speed of the motor. Tajima's design incorporates a frequency component remover, which utilizes feedforward control to eliminate predetermined frequency components, ensuring smoother operation of the AC motor.
Career Highlights
Tajima has worked with notable companies in the technology sector, including Fuji Electric Co., Ltd. and Fuji Electric Systems Co., Ltd. His tenure at these establishments has undoubtedly shaped his expertise and driven his innovative spirit, allowing him to develop products that address modern engineering challenges.
Collaborations
Throughout his career, Hirokazu Tajima has collaborated with talented professionals, including Hidetoshi Umida and Hiroshi Tetsutani. These partnerships have emphasized team creativity and shared knowledge, contributing to the richness of his inventions.
Conclusion
Hirokazu Tajima stands as an inspiration in the field of innovation and invention. With his impressive portfolio of patents and contributions to electric motor control and power systems, he exemplifies the invaluable impact of inventors on technology and engineering. His work continues to pave the way for future advancements, benefitting both industries and consumers alike.