Company Filing History:
Years Active: 2008-2009
Title: Innovations of Belvin Sewell Freeman
Introduction
Belvin Sewell Freeman is an accomplished inventor based in Moretown, Vermont, known for his contributions to power inverter technology. With a total of two patents to his name, Freeman has made significant strides in the field of electrical engineering.
Latest Patents
Freeman's latest patents focus on "Frequency control and power balancing in disturbed power inverter system and method thereof." This innovative system and method are designed for controlling DC to AC power converters, or inverters, that operate as voltage sources and are paralleled on the AC side. The method allows for controlling frequency while sharing real power, requiring no communication between inverters for proper load sharing. This enhances the reliability of a system of parallel inverters. The only signals needed for control are the AC voltage and frequency, along with their reaction to the inverter output current. This invention enables multiple inverters or active rectifiers to share power based on their available power capacity. It allows for the parallel connection of distributed generation sources with varying response times, whether connected to a utility grid or a stand-alone power network, without requiring communication between inverters. The addition of communication can facilitate energy dispatch for economic reasons and fine-tune load balance, although it is not necessary for reliable short-term operation.
Career Highlights
Freeman is currently associated with Northern Power Systems, Inc., where he continues to innovate in the field of power systems. His work has contributed to advancements in renewable energy technologies and the efficiency of power distribution systems.
Collaborations
Freeman collaborates with Jeffrey K. Petter, enhancing the innovative capabilities of their projects and contributing to the development of cutting-edge technologies in their field.
Conclusion
Belvin Sewell Freeman's work in power inverter technology showcases his commitment to innovation and reliability in electrical engineering. His patents reflect a deep understanding of the complexities of power systems and contribute to the advancement of renewable energy solutions.