Yukinori Maruyama

Title: Inventor Yukinori Maruyama: Innovating Motor Control Technology

Introduction

Yukinori Maruyama is a notable inventor based in Kadoma, Japan, known for his ingenuity in motor control technology. With a portfolio of four patents, Maruyama has made significant contributions to the field, particularly in position-sensorless motor control techniques.

Latest Patents

Among his latest patents, Maruyama has developed a method and apparatus for position-sensorless motor control. This innovative method superimposes a rotor-position estimation current signal onto the gamma-axis direction component of a target current vector, which represents the target currents of stator windings. The current signal's period is an even multiple of a PWM carrier period, varying at random to enhance its effectiveness. Furthermore, the amplitude of the current signal is designed to increase with the amplitudes of the target currents, enabling more precise control.

In addition, Maruyama's position sensorless motor control apparatus achieves high-resolution and high-accuracy angle estimation. It is capable of performing reliably even when phase voltage saturation occurs and can accurately estimate angle changes despite fluctuations in the back electromotive force constant. This apparatus includes an angle estimating unit that consists of an estimation phase selecting unit, a deviation generating unit, an angle correcting unit, and an estimated coefficient value correcting unit, all of which work cohesively to refine angle estimation.

Career Highlights

Yukinori Maruyama has dedicated his career to developing advanced technologies at Matsushita Electric Industrial Co., Ltd., a leading electronics manufacturer renowned for its innovations. His work contributes significantly to the improvement of motor control systems, elevating the performance and reliability of electric motors used in various applications.

Collaborations

Throughout his career, Maruyama has collaborated with talented coworkers such as Kazushige Narazaki and Toru Tazawa. Their combined expertise and teamwork have fostered an environment of innovation, leading to the successful development of cutting-edge technologies that stand out in the industry.

Conclusion

With a strong track record of patenting innovative solutions, Yukinori Maruyama exemplifies the spirit of creativity and advancement in motor control technologies. His contributions continue to pave the way for future improvements in the field, ensuring that the industry evolves to meet the demands of a rapidly changing technological landscape.