Yanquan Zhang

Title: Yanquan Zhang: Innovator in UPS Control Methods

Introduction

Yanquan Zhang is a notable inventor based in Shenzhen, China. He has made significant contributions to the field of uninterruptible power supplies (UPS) through his innovative control methods. His work focuses on enhancing the performance and reliability of UPS systems.

Latest Patents

Yanquan Zhang holds a patent for a control method during zero-crossing operation of bridge arms in UPS. This patent describes a control method that involves managing the zero-crossing operation of bridge arms in a UPS. The UPS features a rectifying bridge with first and second switching transistors, a midline bridge arm with third and fourth switching transistors, and an inverter bridge arm with fifth and sixth switching transistors. The method ensures that the midline and rectifying bridge arms cross zero synchronously. Additionally, it controls the inverter bridge arm to be disconnected during specific periods around the zero-crossing point of the rectifying bridge arm. This innovative approach reduces the impact of asynchronous zero-crossing between the PFC circuit and the inverter circuit on UPS performance indices.

Career Highlights

Yanquan Zhang is currently employed at Liebert Corporation, where he continues to develop advanced technologies in power supply systems. His expertise in control methods has positioned him as a key player in the industry.

Collaborations

Yanquan has collaborated with notable colleagues, including Xiaobo Fan and Lihua Xie. Their combined efforts contribute to the advancement of UPS technology and innovation.

Conclusion

Yanquan Zhang's contributions to UPS control methods demonstrate his commitment to innovation in the field of power supply systems. His patent reflects a significant advancement that enhances the performance and reliability of UPS technology.