Chiaki Yamawaki

Title: Chiaki Yamawaki: Innovator in Motor Speed Control Technology

Introduction

Chiaki Yamawaki is a prominent inventor based in Habikino, Japan. She has made significant contributions to the field of motor speed control technology, holding a total of 10 patents. Her innovative work focuses on enhancing the performance and stability of polyphase brushless motors.

Latest Patents

One of her latest patents is a motor speed control device that utilizes a sinusoidal wave data stream to correct torque ripple in motors. This device stores corrective data in a memory and computes rotational angle information from pulse signals generated during motor rotation. By recalling sinusoidal wave data corresponding to this information, the device subtracts the corrective signal from the motor control signal, effectively suppressing torque ripple and achieving stable motor speed control. Another notable patent involves a motor speed control device equipped with an FG sensor and a waveform shaping circuit. This device generates pulse signals to control motor rotation speed based on period information from the FG pulse signal. It also includes a nonuniformity correcting circuit to address periodic nonuniformities, allowing for precise control of motor speed.

Career Highlights

Throughout her career, Chiaki Yamawaki has worked with notable companies, including Sharp Corporation. Her expertise in motor control technology has positioned her as a key figure in the industry, contributing to advancements that enhance motor performance.

Collaborations

Chiaki has collaborated with esteemed colleagues such as Tetsuo Iwaki and Tohru Okuda. These partnerships have fostered innovation and development in her field.

Conclusion

Chiaki Yamawaki's contributions to motor speed control technology exemplify her dedication to innovation. Her patents reflect a commitment to improving motor performance and stability, making her a significant figure in the realm of engineering and invention.