Yan Liu

Title: Innovations of Yan Liu in Transformer Technology

Introduction

Yan Liu is a prominent inventor based in Hong Kong, China, known for his significant contributions to transformer technology. With a total of seven patents to his name, Liu has developed innovative solutions that enhance efficiency and performance in electrical systems.

Latest Patents

One of Liu's latest patents is a low-core-loss transformer with a magnetic pillar in the center of four corner pillars. This transformer is designed for high transfer ratio and high power density applications. It features five pillars, including four corner pillars and at least one center pillar, which provides an additional flux path to reduce thermal and core losses, thereby improving efficiency. The design allows for a flexible voltage transfer ratio, accommodating both even and odd numbers. This is particularly beneficial for future data centers that require a 400-volt high-distribution power bus. Additionally, the transformer windings can be traced on a Printed Circuit Board (PCB), integrating electronic components for a compact and modular design.

Another notable patent is the method and apparatus of dead time tuning in an inverter. This method prevents overload to the input source and reduces parasitic inductance in an inverter circuit with dead-time control. A sensing capacitor is utilized to monitor the temperatures of transistors within the inverter circuit. A delay generator adjusts the delay times based on the temperatures received from the sensing capacitor. Consequently, a dead time generation unit modifies the dead times for the transistors in response to these changes.

Career Highlights

Liu has worked with esteemed organizations such as the Hong Kong Applied Science and Technology Research Institute Company Limited and The Hong Kong Polytechnic University. His work in these institutions has allowed him to further his research and development in electrical engineering.

Collaborations

Throughout his career, Liu has collaborated with notable colleagues, including Song He and Jun Chen. These partnerships have contributed to the advancement of his innovative projects and patents.

Conclusion

Yan Liu's contributions to transformer technology and inverter systems demonstrate his commitment to innovation and efficiency in electrical engineering. His patents reflect a deep understanding of the challenges in the field and provide practical solutions for future applications.