Location History:
- Fukuoka, JP (2018)
- Kitakyushu, JP (2018 - 2019)
Company Filing History:
3 out of 1,101 
1 out of 32 
Years Active: 2018-2019
Title: Innovations of Hiroshi Takagi
Introduction
Hiroshi Takagi is a notable inventor based in Kitakyushu, Japan. He has made significant contributions to the field of inverter technology, holding a total of 3 patents. His work focuses on enhancing the efficiency and functionality of power conversion systems.
Latest Patents
Hiroshi Takagi's latest patents include an inverter system, an inverter apparatus, and a method of controlling an inverter system. The inverter system comprises an inverter apparatus and a smoothing capacitor charging-power apparatus. The inverter apparatus features a transformer with primary and secondary windings, along with inverter cells that include a converter circuit, a smoothing capacitor, and an inverter circuit. The converter circuit is designed to convert an intermediate alternating-current voltage into a direct-current voltage, while the smoothing capacitor ensures the direct-current voltage is smoothed. The inverter circuit generates a phase voltage of a variable alternating-current voltage from the smoothed direct-current voltage. Additionally, the smoothing capacitor charging-power apparatus is connected to the primary windings to supply initial charging power to the smoothing capacitor.
Another significant patent is a power conversion apparatus that connects to a 3-phase AC power source. This apparatus includes fuses positioned on different phases of the source, along with voltage detection devices that monitor the voltage between phases. A status detection device is integrated to assess the condition of the fuses based on the voltage detection results.
Career Highlights
Hiroshi Takagi has worked with prominent companies such as Yaskawa Electric Corporation and Yaskawa America, Inc. His experience in these organizations has allowed him to develop and refine his innovative technologies in power conversion.
Collaborations
Throughout his career, Hiroshi has collaborated with talented individuals, including Kenji Mitsuda and Taisuke Katayama. These partnerships have contributed to the advancement of his projects and innovations.
Conclusion
Hiroshi Takagi's contributions to inverter technology and power conversion systems highlight his role as a significant inventor in the field. His patents reflect a commitment to improving energy efficiency and functionality in electrical systems.