Company Filing History:
1 out of 6 
1 out of 832,761 Years Active: 1988-1998
Title: Innovations by Luke Y Yu
Introduction
Luke Y Yu is an accomplished inventor based in San Marino, California. He holds two patents that showcase his expertise in electrical engineering and protection systems for electrical machines. His innovative contributions have significantly impacted the field of power systems.
Latest Patents
One of his latest patents is a transformer protection system designed to protect source transformers from zero-sequence currents. This system converts a three-phase, four-wire power system to divert all zero-sequence current from the grounded-neutral source transformer and its phase and neutral conductors. A zero-sequence filter transformer, such as a zig-zag transformer, is installed, and the system neutral conductor and ground point are relocated to enhance protection. The protection scheme operates to trip a main circuit breaker for overloads or short circuits, ensuring the source transformer and its neutral circuit are safeguarded from the adverse effects of zero-sequence currents.
Another notable patent is a system for protecting electrical machines against damage from power source interruptions. This system allows for rapid transfers between power sources or reconnections to momentarily interrupted sources without exposing the machines to unsafe voltage levels. It effectively short circuits the electrical machines to quickly reduce their residual voltage to a safe level for reconnection. This system is compatible with both induction and synchronous machines and eliminates the need for interlocking devices, thereby expediting the transfer process while minimizing risks.
Career Highlights
Throughout his career, Luke Y Yu has worked with various companies, including FTS Corporation. His experience in the industry has equipped him with the knowledge and skills necessary to develop innovative solutions for electrical systems.
Collaborations
Luke has collaborated with notable professionals in his field, including Gerald W Bottrell. Their combined expertise has contributed to advancements in electrical engineering and protection systems.
Conclusion
Luke Y Yu's contributions to the field of electrical engineering through his patents demonstrate his commitment to innovation and safety in power systems. His work continues to influence the industry and pave the way for future advancements.