Location History:
- Taoyuan, TW (2019)
- Shanghai, CN (2022 - 2023)
Company Filing History:
2 out of 604 
1 out of 3,376 
Years Active: 2019-2023
Title: Innovations by Inventor Liangliang Ren
Introduction
Liangliang Ren is a notable inventor based in Shanghai, China. He has made significant contributions to the field of electrical engineering, particularly in power factor correction and transformer technology. With a total of 3 patents to his name, Ren continues to push the boundaries of innovation.
Latest Patents
One of Ren's latest patents is a "Power factor correction converter and control method thereof." This invention includes a PFC converter that consists of a first bridge, an inductor, a second bridge, and a control unit. The first bridge features a first switch and a second switch connected in series, with a first node positioned between them. The inductor's terminals are coupled to this first node and a first terminal of an AC power source. The second bridge also includes a third switch and a fourth switch connected in series, with a second node between them, coupled to a second terminal of the AC power source. The control unit is designed to manage the ratio of the high-level duration on the second node in every line frequency cycle, ensuring it remains smaller than (250/Vbus), where Vbus represents the output voltage of the PFC converter.
Another significant patent is related to a transformer design. This transformer includes a magnetic core, a bobbin, and a primary winding wound around the bobbin. It features at least one first secondary winding and one second secondary winding, with at least one turn of coil from the first secondary winding adjacent to at least one turn of coil from the second secondary winding. These windings are utilized in a full-wave rectifier circuit. Additionally, a leakage inductance groove is provided to isolate the primary winding from the secondary winding.
Career Highlights
Liangliang Ren has worked with prominent companies in the electronics sector, including Delta Electronics (Shanghai) Co., Ltd and Delta Electronics, Inc. His experience in these organizations has allowed him to refine his skills and contribute to various innovative projects.
Collaborations
Ren has collaborated with notable colleagues such as Hongbao Wang and Dezhi Jiao. Their teamwork has fostered an environment of creativity and innovation, leading to advancements in their respective fields.
Conclusion
Liangliang Ren is a distinguished inventor whose work in power factor correction and transformer technology has made a significant impact. His patents reflect his commitment to