Location History:
- Penn Hills Township, PA (US) (1976)
- Penn Mills, PA (US) (1981)
- Pittsburgh, PA (US) (1977 - 1984)
- Penn Hills Twp., Allegheny County, PA (US) (1993)
- Penn Hills, PA (US) (1978 - 1994)
Company Filing History:
Years Active: 1976-1994
Title: Innovations of John Rosa in Power Systems
Introduction
John Rosa is a prominent inventor based in Penn Hills, PA, known for his significant contributions to the field of power systems. With a total of 18 patents to his name, Rosa has made remarkable advancements in inverter technology, particularly in the area of harmonic neutralization.
Latest Patents
Among his latest patents, Rosa has developed a system for harmonic neutralization of static inverters. This innovative approach involves quasi-harmonic neutralized inverter systems equipped with interphase transformers arranged in a waffle tree configuration. Each transformer receives staggered voltage waveforms, which effectively reduce the harmonic components of the output voltage. The inverters are designed to produce voltage waveforms at specific phase angles, ensuring the necessary stagger angles at the inputs of the interphase transformers. Additionally, Rosa has patented a method for quasi-harmonic neutralization of voltages in inverter systems, further enhancing the efficiency and performance of these technologies. Another notable invention is an uninterruptible power supply (UPS) system that operates initially in a commutation mode, allowing for seamless transfer between power sources.
Career Highlights
Rosa's career is marked by his work at Westinghouse Electric Corporation, where he has been instrumental in developing cutting-edge technologies in power systems. His expertise in inverter systems has positioned him as a leader in the field, contributing to advancements that benefit various industries.
Collaborations
Throughout his career, Rosa has collaborated with notable colleagues, including Laszlo Gyugyi and Eric J Stacey. These partnerships have fostered innovation and have led to the successful development of several patented technologies.
Conclusion
John Rosa's contributions to the field of power systems through his innovative patents and collaborative efforts have significantly advanced inverter technology. His work continues to influence the industry and pave the way for future innovations.