Chunyan Nie

Title: Innovations of Chunyan Nie

Introduction

Chunyan Nie is a notable inventor based in Nanjing, China. He has made significant contributions to the field of electrical engineering, particularly in the area of current sampling circuits. His innovative work has led to the development of a unique patent that enhances the efficiency of isolated converters.

Latest Patents

Chunyan Nie holds a patent for a "Lossless exciting current sampling circuit for isolated converter." This invention includes first and second voltage sampling circuits and a subtraction circuit formed by an operational amplifier. The two sampling circuits sample voltages of the primary winding of an isolation transformer, with outputs fed into the subtracter. The subtracter output serves as the circuit's output. RC low-pass filters with large time constants are utilized as primary voltage sampling circuits, enabling integration of voltage differences between the exciting inductance terminals. This design allows for lossless current sampling without the need for resistors or transformers. The current sampling result is employed for volt-second balance control, realized alongside a hold circuit and comparator that generates a control signal by comparing the sampling hold result with the current sampling result.

Career Highlights

Chunyan Nie is affiliated with Southeast University, where he continues to engage in research and development in electrical engineering. His work is characterized by a commitment to innovation and practical applications of theoretical concepts.

Collaborations

Chunyan Nie collaborates with various professionals in his field, including his coworker, Song Ding, who is also involved in research and development efforts.

Conclusion

Chunyan Nie's contributions to the field of electrical engineering, particularly through his patent for a lossless exciting current sampling circuit, demonstrate his innovative spirit and dedication to advancing technology. His work at Southeast University continues to influence the industry positively.