Shigeru Nakajima

Title: Shigeru Nakajima: Innovator in Semiconductor and Motor Control Technologies

Introduction

Shigeru Nakajima is a notable inventor based in Zama, Kanagawa, Japan. He has made significant contributions to the fields of semiconductor devices and motor control technologies. With a total of 3 patents to his name, Nakajima's work has had a considerable impact on the industry.

Latest Patents

One of Nakajima's latest patents is a semiconductor device designed to detect abnormalities during operation. This device operates by comparing an input specifying a PWM signal with an estimated input obtained from an inverse operation. The semiconductor device includes a main circuit that performs a predetermined operation on an input signal to produce an output signal. An inverse operation circuit receives this output signal and performs an inverse operation to generate an inverse operation result signal. A comparison circuit then compares the input signal with the inverse operation result signal, outputting a predetermined signal when discrepancies are detected.

Another significant patent is a motor control device that features a PWM generator. This generator produces a PWM signal for a drive circuit that energizes the winding of a switched reluctance motor. The device also includes a rectangular wave generator that outputs a rectangular wave signal based on the motor's rotational position. A drive signal switcher executes switching to ensure that PWM drive is performed when the motor's rotational speed is below a threshold value, while a rectangular wave drive is utilized when the speed exceeds this threshold.

Career Highlights

Throughout his career, Shigeru Nakajima has worked with prominent companies such as Kabushiki Kaisha Toshiba and Toshiba Electronic Devices & Storage Corporation. His experience in these organizations has allowed him to develop and refine his innovative ideas in semiconductor and motor control technologies.

Collaborations

Nakajima has collaborated with notable coworkers, including Toshimitsu Aizawa and Makoto Shinohara. Their combined expertise has contributed to the advancement of technology in their respective fields.

Conclusion

Shigeru Nakajima's contributions to semiconductor devices and motor control technologies highlight his innovative spirit and dedication to advancing engineering solutions. His patents reflect a commitment to improving operational efficiency and reliability in electronic systems.