Company Filing History:
Years Active: 1992
Title: Innovations by Ling-Hwei Chang
Introduction
Ling-Hwei Chang is a notable inventor based in Hsinchu, Taiwan. He has made significant contributions to the field of electrical engineering, particularly in the development of devices that enhance the efficiency of household electrical equipment. His innovative approach has led to the creation of a unique starting-current limiting device for single-phase induction motors.
Latest Patents
Ling-Hwei Chang holds a patent for a starting-current limiting device designed for single-phase induction motors. This device is specifically tailored for use in household electrical equipment and operates by providing a low and gradually increasing starting current when the power switch is activated. The device effectively reduces the average voltage input to the motor by cutting portions of each AC cycle and can also modify the waveform to appear as if it has a lower frequency. The technology incorporates a switching circuit with multiple thyristors, which can be silicon-controlled rectifiers or triacs. A timing signal generator is utilized to produce triggering signals that control the operation of the thyristors, ensuring that the motor receives the appropriate current.
Career Highlights
Ling-Hwei Chang is affiliated with the Industrial Technology Research Institute, where he has been instrumental in advancing research and development in electrical engineering. His work has not only contributed to the efficiency of electrical devices but has also paved the way for further innovations in the industry.
Collaborations
Throughout his career, Ling-Hwei Chang has collaborated with esteemed colleagues such as Tien-Cheng Hu and Wen-Hui Cheng. These partnerships have fostered a collaborative environment that encourages the exchange of ideas and the development of cutting-edge technologies.
Conclusion
Ling-Hwei Chang's contributions to the field of electrical engineering, particularly through his innovative starting-current limiting device, highlight his role as a significant inventor. His work continues to influence the efficiency of household electrical equipment, showcasing the importance of innovation in everyday technology.