Edward J Cham

Title: Edward J Cham: Innovator in Phase-Shift Transformer Technology

Introduction

Edward J Cham is a notable inventor based in Howland, Ohio, known for his contributions to transformer technology. He holds a total of 3 patents that showcase his innovative approach to electrical engineering. His work primarily focuses on phase-shift transformers, which are essential in various electrical applications.

Latest Patents

One of Cham's latest patents is the "Advance and Retard Phase-Shift Transformer." This invention provides a phase-shift transformer circuit that allows for advance or retard phase shift at any predetermined angle. The phase shift angle is determined by the ratio of the main and short windings of the transformer primary. The design includes two links that facilitate the advance or retard phase shift. In the advance configuration, one transformer winding connects directly to a phase conductor, while the other two windings connect to the remaining phase conductors via the links. The configuration can be reversed in the retard phase-shift setup.

Another significant patent is the "Rectifier Transformer," which permits six-phase double-wye operation with 120-degree conduction without the need for an interphase transformer. This transformer features a zig-zag wye primary winding and a six-phase star secondary winding. By selecting the appropriate turns ratio for the zig and zag portions of the primary winding, any degree of phase shift can be achieved. This invention is particularly beneficial for multiple-phase installations, where several rectifier transformers can be utilized, each providing different amounts of phase shift.

Career Highlights

Edward J Cham is associated with Westinghouse Electric Corporation, where he has made significant contributions to the field of electrical engineering. His work has been instrumental in advancing transformer technology, particularly in phase-shifting applications.

Collaborations

Cham has collaborated with notable coworkers, including Theodore R Specht and Ronald M Stefanick. Their combined expertise has contributed to the development of innovative solutions in transformer technology.

Conclusion

Edward J Cham's contributions to phase-shift transformer technology have made a lasting impact in the field of electrical engineering. His innovative patents reflect his dedication to advancing technology and improving electrical systems.