Location History:
- Narashino, JP (1984)
- Funabashi, JP (1985 - 1988)
- Chiba, JP (1988)
Company Filing History:
Years Active: 1984-1988
Title: Motonobu Hattori: Innovator in PWM Inverter Technology
Introduction
Motonobu Hattori is a distinguished inventor based in Funabashi, Japan. He has made significant contributions to the field of pulse width modulation (PWM) inverters, holding a total of 7 patents. His work focuses on enhancing the efficiency and control of electrical systems, particularly in the context of induction motors.
Latest Patents
Hattori's latest patents include innovative methods and apparatuses for controlling PWM inverters. One notable patent describes a method for selectively controlling an operation mode of a PWM inverter. This method involves sampling the amplitude of a modulation wave at a cycle rate related to the frequency of a carrier wave. The synchronization of the modulation wave and the carrier wave is determined based on the sampled modulation wave amplitude. Another significant patent outlines a control system for PWM inverters that allows for variable voltage and frequency operation while maintaining a constant output voltage-to-frequency ratio. This system includes various components for detecting current, setting frequency, and calculating necessary corrections based on load conditions.
Career Highlights
Motonobu Hattori is currently employed at Hitachi, Ltd., where he continues to develop advanced technologies in electrical engineering. His expertise in PWM inverter technology has positioned him as a key figure in the industry, contributing to the advancement of efficient motor control systems.
Collaborations
Throughout his career, Hattori has collaborated with notable colleagues, including Kenji Nandoh and Nobuyoshi Mutoh. These collaborations have fostered innovation and have led to the development of cutting-edge technologies in the field.
Conclusion
Motonobu Hattori's contributions to PWM inverter technology exemplify his commitment to innovation and efficiency in electrical systems. His patents and career achievements reflect a deep understanding of the complexities involved in motor control, making him a valuable asset to the engineering community.