This inventor holds 3 USPTO granted patents. Top assignees: Hitachi Tohbu Semiconductor, Ltd., Hitachi Ulsi Systems Co., Ltd., Renesas Technology Corp.. Active years: 2004-2005.
Company Filing History:
1 out of 35 
1 out of 336 
1 out of 3,781 
Years Active: 2004-2005
Title: Reiichi Kimura: Innovator in Motor Control Systems
Introduction
Reiichi Kimura is a notable inventor based in Takasaki, Japan. He has made significant contributions to the field of motor control systems, holding a total of 3 patents. His work focuses on enhancing the efficiency and performance of sensor-less motors and magnetic storage devices.
Latest Patents
One of Kimura's latest patents is a drive control system for sensor-less motors. This innovative system utilizes PLL control to drive a rotatable multi-phase sensor-less motor by switching the current of a field coil for each phase based on the motor's rotating phase. The system detects a desired phase as a detection phase and measures the voltage induced on the coil of this phase when power is supplied to the other field coils for a predetermined time. This method allows for accurate magnetic pole position detection, which is crucial for effective motor drive control.
Another significant patent is for a magnetic disk storage apparatus. This invention enables the feeding of sine waveform currents through coils using a compact circuit design. It achieves highly dense magnetic storage with minimal rotation variations and provides a low-noise driving control circuit for motors. The design involves driving one phase of a three-phase brushless motor at full amplitude while gradually changing the voltages of the other phases to deliver a sine waveform current.
Career Highlights
Throughout his career, Reiichi Kimura has worked with prominent companies, including Hitachi Tohbu Semiconductor, Ltd. His experience in these organizations has contributed to his expertise in motor control technologies and magnetic storage solutions.
Collaborations
Kimura has collaborated with notable colleagues such as Yasuhiko Kokami and Kunihiro Kawauchi. These partnerships have likely fostered innovation and advancements in their respective fields.
Conclusion
Reiichi Kimura's contributions to motor control systems and magnetic storage technologies highlight his role as a significant inventor in Japan. His patents reflect a commitment to innovation and efficiency in engineering.