Qingwen Sun

Title: Qingwen Sun: Innovator in EMU Control Strategies

Introduction

Qingwen Sun is a notable inventor based in Qingdao, China. He has made significant contributions to the field of electrical engineering, particularly in the development of control strategies for electric multiple units (EMU). With a total of 2 patents, his work focuses on enhancing the reliability and efficiency of power systems.

Latest Patents

One of his latest patents is titled "Synchronous soft-start networking control strategy for parallel auxiliary converters of EMU." This invention addresses the challenge of connecting multiple auxiliary converters to a bus system. The strategy allows non-first auxiliary converters to complete networking during the amplitude soft-start process of the first auxiliary converter. The specific solution includes fast networking logic, bus fast-tracking logic, and a PQ droop networking control strategy. This innovation ensures that EMUs can achieve startup loading within a specified time under various working conditions, thereby providing a strong guarantee for stable and reliable operation.

Another significant patent is the "Parallel control method and system for single-phase inverters and inverter." This invention involves acquiring the output voltage and current of single-phase inverters and transforming these values into dq coordinates for decoupling. The system allows for multiple single-phase inverters to operate in parallel, ensuring that if one inverter fails, the others can automatically take over the load. This design enhances reliability and avoids delays in power supply, which is crucial for vehicle operation.

Career Highlights

Qingwen Sun has worked with Crrc Qingdao Sifang Rolling Stock Research Institute Co., Ltd., where he has contributed to various innovative projects. His expertise in control systems has been instrumental in advancing the technology used in EMUs.

Collaborations

He has collaborated with notable colleagues such as Bo Zhang and Meiyun Li, further enriching his work through shared knowledge and expertise.

Conclusion

Qingwen Sun's contributions to the field of electrical engineering, particularly in the development of control strategies for EMUs, highlight his innovative spirit and dedication to enhancing power system reliability. His patents reflect a commitment to advancing technology in the transportation sector.