William James Long

Title: The Innovations of William James Long

Introduction

William James Long is a notable inventor based in Cork, Ireland. He holds a total of four patents, showcasing his contributions to the field of technology and engineering. His work primarily focuses on systems and methods that enhance power supply efficiency and regulation.

Latest Patents

One of his latest patents is titled "Systems and methods of CCM primary-side regulation." This invention involves subtracting an estimate of the secondary IR drop from each output voltage sample. By doing so, it allows for a fixed sample instant to be set, eliminating the need to hunt for an optimum sample instant or one with minimum IR drop error. The estimate of the IR drop can be adjusted on a cycle-by-cycle basis, based on the commanded primary peak current. This adjustment is crucial as the peak secondary current is directly proportional to the turns ratio of the transformer. For improved accuracy, an adjustment may also be made for the decay of secondary current during the delay to the sample instant, provided the inductance value is known.

Another significant patent is "Direct conduction control for power factor correction circuit." This system includes a switching power supply with switch devices that provide a regulated output voltage based on an input voltage. A controller manages the switch devices according to a power demand signal. Additionally, a direct conduction avoidance circuit generates a signal when the regulated output voltage exceeds a direct conduction threshold voltage. This signal is combined with a compensation signal to inform the controller of the power demand. An override circuit is also included to disable the direct conduction avoidance circuit when the input voltage falls below an override threshold voltage.

Career Highlights

William James Long has worked with prominent companies such as Texas Instruments Corporation and Texas Instruments (Cork) Limited. His experience in these organizations has allowed him to develop and refine his innovative ideas in power supply technology.

Collaborations

Throughout his career, he has collaborated with notable individuals, including Andrew Bernard Keogh and Salvatore Giombanco. These partnerships have contributed to the advancement of his projects and inventions.

Conclusion

William James Long's contributions to the field of technology through his patents and collaborations highlight his innovative spirit and dedication to improving power supply systems. His work continues to influence the industry and inspire future advancements.