Biaojie Qi

Title: Innovations of Biaojie Qi in Three-Phase Inverter Technology

Introduction

Biaojie Qi is a notable inventor based in Zhejiang, China, recognized for his contributions to the field of power electronics. He holds three patents that focus on enhancing the efficiency and performance of three-phase inverters. His work is pivotal in advancing technologies that support renewable energy systems.

Latest Patents

Biaojie Qi's latest patents include a three-phase inverter and a control method for the same. This invention features resonant capacitors positioned between the midpoints of three bridge arms and the positive and negative poles of a DC bus. This configuration creates resonant units with output inductors, establishing a resonant network that facilitates soft switching without the need for additional switching transistors. Compared to conventional technologies, this innovation reduces circuit device requirements, simplifies the control process, and minimizes system overheads. By enabling the three-phase inverter to operate in continuous mode, it effectively lowers switching and conduction losses, enhances conversion efficiency, and reduces electromagnetic noise, resulting in high-quality grid currents.

Another significant patent is the control method and system for a three-phase grid-connected inverter. This invention includes a three-phase three-leg grid-connected inverter, where a filter capacitor is connected to the negative electrode of a DC input bus. This setup forms a filter loop that effectively filters harmonic waves, ensuring high-quality grid-connected current at low power levels without increasing inductance values. The inverter operates in a discontinuous conduction mode, which further reduces switching losses, making it suitable for photovoltaic microinverters.

Career Highlights

Biaojie Qi is currently employed at Altenergy Power System, Inc., where he continues to innovate in the field of power electronics. His work significantly contributes to the development of efficient energy systems that are essential for modern renewable energy applications.

Collaborations

Biaojie Qi collaborates with talented individuals such as Yongchun Yang and Yuhao Luo, who contribute to his projects and innovations in the field.

Conclusion

Biaojie Qi's innovative work in three-phase inverter technology showcases his commitment to improving energy efficiency and performance in power electronics. His patents reflect significant advancements that are crucial for the future of renewable energy systems.