Shiguo Luo

Title: Innovations by Shiguo Luo in Power Conversion Technology.

Introduction

Shiguo Luo is a notable inventor based in Plano, TX, who has made significant contributions to the field of power conversion technology. With a total of 2 patents, his work focuses on enhancing the efficiency and cost-effectiveness of AC/DC converters.

Latest Patents

One of his latest patents is a low-cost AC/DC converter with power factor correction. This high-performance single-stage Power Factor Correction (PFC) converter features tight output voltage regulation and a simple circuit design, resulting in lower costs compared to its counterparts. The design includes two basic flyback circuits with a straightforward control circuit. For the hard switching circuit, only one switch is utilized to achieve cost efficiency, while the soft switching scheme incorporates an auxiliary switch to enhance efficiency and reduce size. The converter's design allows for two power flow paths, minimizing current stress and improving overall efficiency. Additionally, the maximum DC bus voltage is limited to less than 400 volts, allowing for the use of a single commercial capacitor under light load conditions.

Another significant patent by Shiguo Luo is an AC/DC switch mode power supply with power factor correction using a direct energy transfer concept. This innovation features a Power Factor Correction (PFC) "flyboost" cell, which combines the functions of a flyback transformer and boost inductor. The design allows for a single-stage PFC converter that shares one main switch and controller between the flyboost cell and DC/DC conversion cells. Operating the flyboost cell at Discontinuous Conduction Mode simplifies control while achieving a high power factor. This design significantly improves efficiency by processing part of the output power through the main switch, referred to as direct power transfer (DPT). The flyboost cell also automatically limits the DC bus voltage through its transformer turn ratio, making the converters suitable for universal voltage applications.

Career Highlights

Shiguo Luo is affiliated with the University of Central Florida Research Foundation Inc., where he continues to innovate in the field of power electronics. His work has garnered attention for its practical applications and contributions to energy efficiency.

Collaborations

Some of his notable coworkers include Issa E Batarseh and Weihong Qui, who have collaborated with him on various projects related to power conversion technologies.

Conclusion

Shiguo Luo's innovative patents in power conversion technology demonstrate his commitment to