Chao-Fong Chang

Title: Chao-Fong Chang’s Power Conversion Innovations.

Introduction

Chao-Fong Chang is an inventor based in Taoyuan, Taiwan, whose work focuses on power conversion and control technologies. He is associated with Delta Electronics, Inc. His patent portfolio includes 2 patents addressing power supply operation and three-phase resonant conversion.

Latest Patents

Chang’s patent, “Power Supply and Operating Method Thereof,” describes a system that supplies power to a load while accounting for the power used by both the main conversion circuit and an auxiliary power supply. Its control circuit estimates the system’s output power and adjusts the output voltage in response to changes in input voltage, output power, or environmental temperature.

His patent, “Three-Phase Resonant Converter and Method of Controlling the Same,” concerns a converter with a three-phase transformer, input switching arms, and output synchronous rectification switches. A control unit coordinates the rectification switches with the corresponding input switches, using a leading phase angle to help keep the converter’s output voltage above a specified threshold.

Career Highlights

Chang’s disclosed inventions address practical challenges in power electronics, including output-voltage regulation and coordinated switching in resonant converters. These technologies are relevant to the design and operation of power conversion systems.

Collaborations

Chang is associated with Delta Electronics, Inc., a company whose work includes power and electronics technologies. The available information identifies this company connection but does not specify particular collaborators or project teams for the patents.

Conclusion

Chao-Fong Chang’s two patents reflect a focus on controlling power supplies and improving the operation of three-phase resonant converters.