Yen-John Chen

Title: Yen-John Chen: Innovator in Power Protection and Motor Drive Technologies

Introduction

Yen-John Chen is a notable inventor based in Changhua, Taiwan. He has made significant contributions to the fields of power protection devices and motor drive technologies. With a total of 3 patents to his name, Chen's work reflects a commitment to innovation and technological advancement.

Latest Patents

One of his latest inventions is a power protection device. This device includes a power source switching unit that shuts off the power supply from an AC power source based on an open control signal. It features a surge voltage protecting unit that outputs the open control signal when a surge voltage occurs, a leakage current protecting unit that does the same for leakage currents, and an over-current protecting unit that activates according to current values during over-current situations. This power protection device provides comprehensive protection against surge voltages, leakage currents, and over-currents simultaneously.

Another significant patent is a motor drive circuit and method with frequency setting and correcting functions. This drive circuit incorporates a speed control device that receives both a sense signal and a rotation frequency signal. It generates a pulse width modulation signal capable of modulating a duty ratio through a pulse width modulation method. This signal is then sent to a drive timing controller, which produces a timing control signal to manage the output timing of a power drive signal. Additionally, a sensor detects the motor and generates a correction sense signal, which is fed back to the speed control device to form a closed-loop control, allowing for automatic correction and setting of the motor's rotation frequency.

Career Highlights

Yen-John Chen is currently associated with Prolific Technology Inc., where he continues to develop innovative solutions in his field. His work has garnered attention for its practical applications and effectiveness in enhancing electrical safety and efficiency.

Collaborations

Chen collaborates with talented individuals such as Chia-Chang Hsu and Chung-Hsien Lin, contributing to a dynamic and innovative work environment.

Conclusion

Yen-John Chen's contributions to power protection and motor drive technologies exemplify his dedication to innovation. His patents not only enhance safety but also improve the efficiency of electrical systems. Through his work at Prolific Technology Inc., he continues to push the boundaries of technology and inspire future advancements.