Pei-Hsin Liu

Title: Pei-Hsin Liu: Innovator in Power Conversion Technology

Introduction

Pei-Hsin Liu is a prominent inventor based in Blacksburg, Virginia. She has made significant contributions to the field of power conversion technology, holding a total of 5 patents. Her work focuses on improving the efficiency and performance of power converters, which are essential in various electronic applications.

Latest Patents

One of her latest patents is titled "Current mode control DC-DC converter with single step load transient response." This invention describes a power converter that utilizes constant on-time (COT) or ramp pulse modulation (RPM) control. It achieves a more rapid return to steady-state operation after a step-up load transient by extending the on-time of a switching pulse. This is accomplished by interrupting a ramp voltage waveform that is compared with a threshold voltage at the termination of a switching pulse or by increasing the voltage with which the ramp voltage is compared. These techniques are applicable to both single-phase and multi-phase power converters.

Another notable patent is "Transient performance improvement for constant on-time power converters." This invention enhances the response of a variable frequency switching constant on-time or adaptive on-time controlled power converter to significant load changes. It employs a simple circuit that detects the magnitude and polarity of changes in output voltage, initiating, extending, or terminating conduction of power pulses from an input source. This innovation reduces both the amplitude and duration of undershoot or overshoot in the transient response, allowing for a significant reduction in output filter capacitance while maintaining comparable transient performance. The fast adaptive on-time control is particularly useful for multi-phase power converters.

Career Highlights

Pei-Hsin Liu is associated with Virginia Tech Intellectual Properties, Inc., where she continues to advance her research and development in power conversion technologies. Her work has garnered attention for its practical applications and innovative approaches to solving complex engineering challenges.

Collaborations

Throughout her career, Pei-Hsin Liu has collaborated with esteemed colleagues, including Fred C. Lee and Qiang Li. These partnerships have contributed to her success and the advancement of technology in her field.

Conclusion

Pei-Hsin Liu is a remarkable inventor whose contributions to power conversion technology have made a significant impact. Her innovative patents and collaborations highlight her dedication to advancing engineering solutions. Her work continues to influence the industry and inspire future innovations.