Masashi Doi is a prominent inventor based in Kyoto, Japan. He has made significant contributions to the field of motor control technology, holding a total of 6 patents. His work focuses on enhancing the efficiency and reliability of motor control systems.

Latest Patents

Doi's latest patents include a motor control device that features a plurality of inverters supplying power to multiple motors through pulse width modulation control. This innovative motor controller is designed with a direct current power supply and a capacitor connected in parallel to the power supply. Each inverter is categorized into groups based on switching frequency, ensuring that all inverters within a group operate with corresponding triangular wave signals determined by a reference frequency. Notably, at least one triangular wave signal differs in frequency or phase from others, optimizing performance.

Another significant patent is the DC power supply device and servo DC power supply system. This device prevents voltage oscillation in the power supply path to a motor control device. It includes a power supply unit, such as an AC/DC converter, that outputs DC power. A filter circuit detects voltage fluctuations in the DC output and adjusts the circuit's impedance to prevent these fluctuations, enhancing the stability of the power supply.

Career Highlights

Masashi Doi is currently employed at Omron Corporation, a leading company in automation and control technology. His work at Omron has allowed him to develop cutting-edge solutions that address complex challenges in motor control.

Collaborations

Doi collaborates with talented coworkers, including Takeshi Ashida and Yasuhiro Hegi. Their combined expertise contributes to the innovative projects at Omron Corporation.

Conclusion

Masashi Doi's contributions to motor control technology exemplify his commitment to innovation and excellence. His patents reflect a deep understanding of electrical engineering and a drive to improve motor control systems.

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