This inventor holds 3 USPTO granted patents. Top assignee: Industrial Technology Research Institute. Active years: 1994-1996.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Hsinchu Hsien, TW (1994)
- Hsinchu, TW (1995)
- Chutung Town, TW (1996)
Company Filing History:
Years Active: 1994-1996
Title: Yaw-Shih Shieh: Innovator in Brushless DC Motor Technology
Introduction
Yaw-Shih Shieh is a prominent inventor based in Hsinchu Hsien, Taiwan. He has made significant contributions to the field of brushless DC motors, particularly in applications for electric vehicles. With a total of 3 patents to his name, Shieh's work focuses on enhancing the efficiency and control of electric motor systems.
Latest Patents
Shieh's latest patents include innovative methods and devices for controlling torque and speed in brushless DC motors. One notable patent is a torque control method and device designed for use in electric motorcycles. This invention simplifies the circuit construction by employing a single current loop to obtain feedback current from a DC bus. The device operates using two input signals: a torque command signal for generating positive torque and a brake command signal for generating negative torque. This allows for effective energy storage during braking and ensures the motor can stop within 120 degrees of its electrical angle of reversed rotation.
Another significant patent focuses on controlling the speed of brushless DC motors in electric vehicles. This method utilizes back electromotive force (EMF) waves to generate a speed feedback signal without the need for traditional feedback elements like DC tachometers or encoders. By processing the back EMF waves through differential amplifiers, Shieh's method reduces costs associated with motor speed control systems while maintaining high performance.
Career Highlights
Yaw-Shih Shieh is affiliated with the Industrial Technology Research Institute, where he continues to develop cutting-edge technologies in motor control. His work has been instrumental in advancing the capabilities of electric vehicles, contributing to the growing field of sustainable transportation.
Collaborations
Shieh has collaborated with notable colleagues, including Tshaw-Chuang Chen and Hong-Shi Chang, to further enhance the research and development of motor technologies.
Conclusion
Yaw-Shih Shieh's innovative contributions to brushless DC motor technology have positioned him as a key figure in the field. His patents reflect a commitment to improving the efficiency and functionality of electric vehicles, paving the way for future advancements in sustainable transportation.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile