Location History:
- Vaster.ang.s, SE (2000)
- Västerås, SE (2002)
- Ojersjo, SE (2015 - 2020)
- Öjersjö, SE (2020)
- Vasteras, SE (2020)
Company Filing History:
4 out of 996 
4 out of 2,622 
1 out of 862 
Years Active: 2000-2020
Title: Innovator Profile: Yujing Liu
Introduction
Yujing Liu is a prominent inventor based in Ojersjo, Sweden, recognized for her groundbreaking work in the field of electrical engineering. With a total of nine patents to her name, Liu has made significant contributions that enhance the efficiency and functionality of electrical components.
Latest Patents
Among her latest innovations are the following patents:
1. **High Efficiency Commutation Circuit**: This patent details a commutation circuit that features a coil linked to an H bridge, which consists of four main switches for reversing polarity and controlling current flow. The innovative design incorporates a voltage source that generates a bypass current, along with an auxiliary switch that modulates this current. This mechanism effectively diminishes switch current through the main switches, enabling the use of thyristors which can turn off automatically under zero current conditions, thus minimizing switching losses across different switch types, including GTOs and IGBTs.
2. **Rotating Electrical Machine and Corresponding Method**: This invention describes a rotating electrical machine equipped with a stator or rotor featuring a series of connected switching cells. Each cell contains a winding subsection and a current reverser designed to manipulate the direction of current flow. Additionally, the current reverser integrates a capacitor, creating a resonant circuit with the winding subsection, optimizing the operational efficiency of the machine.
Career Highlights
Yujing Liu has held significant positions at leading organizations, including ABB Research Ltd. and ABB Schweiz AG. Her experience in these companies has influenced her innovative capabilities and has provided her with a platform to develop and patent her advanced electrical engineering ideas.
Collaborations
Throughout her career, Liu has collaborated with notable professionals in the field, including Darren Dale Tremelling and Dezheng Wu. These collaborations have fostered a creative environment that has been conducive to her innovative pursuits.
Conclusion
Yujing Liu stands out as an influential inventor whose contributions to electrical engineering continue to drive advancements in technology. Her extensive portfolio of patents not only signifies her creative prowess but also promises a future of continued innovation in the industry.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.