This inventor holds 3 USPTO granted patents. Top assignee: Hong Kong Applied Science and Technology Research Institute. Active years: 2012-2014.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 2012-2014
Title: Po Wah (Patrick) Chang: Innovator in Power Conversion Technology
Introduction
Po Wah (Patrick) Chang is a distinguished inventor based in Hong Kong, CN. He has made significant contributions to the field of power conversion technology, holding a total of 3 patents. His innovative work focuses on enhancing the efficiency and functionality of flyback converters.
Latest Patents
Chang's latest patents include groundbreaking technologies that improve current estimation and control in isolated flyback converters. One of his notable inventions is the "Output current estimation for an isolated flyback converter with variable switching frequency control and duty cycle adjustment for both PWM and PFM modes." This patent describes a fly-back power converter that utilizes a current-estimating control loop to sense primary output current, thereby controlling the secondary output effectively.
Another significant patent is the "Constant-current control module using inverter filter multiplier for off-line current-mode primary-side sense isolated flyback converter." This invention allows for a constant-current control loop that senses primary output current without the need for an expensive opto-isolator. It employs a primary-side control circuit that can operate using either Quasi-Resonant (QR) or Pulse-Width-Modulation (PWM) control loops.
Career Highlights
Chang is currently affiliated with the Hong Kong Applied Science and Technology Research Institute, where he continues to push the boundaries of power conversion technology. His work has been instrumental in developing more efficient power converters that are crucial for various applications.
Collaborations
Some of his notable coworkers include Wai Kit (Victor) So and Hing Kit Kwan, who have collaborated with him on various projects within the institute.
Conclusion
Po Wah (Patrick) Chang is a prominent figure in the field of power conversion, with a focus on innovative solutions that enhance the performance of flyback converters. His contributions are paving the way for advancements in this critical area of technology.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile