Charles Proteus Steinmetz and the Alternating Current

Charles Proteus Steinmetz

Charles Proteus Steinmetz

On October 26, 1923, German-born American mathematician and electrical engineer Charles Proteus Steinmetz passed away. Steinmetz fostered the development of alternating current that made possible the expansion of the electric power industry in the United States, formulating mathematical theories for engineers. He made ground-breaking discoveries in the understanding of hysteresis that enabled engineers to design better electromagnetic apparatus equipment including especially electric motors for use in industry.

Charles Proteus Steinmetz attended the University of Breslau studying mathematics and chemistry and earned his doctorate degree in 1888. Meanwhile Steinmetz was investigated by the police for his engagement in a socialist university organisation and his articles published in a local socialist newspaper. He fled to Zurich in the same year and managed to escape a possible arrest. One year later he emigrated to the United States and was almost turned away for his dwarfism. However, a friend convinced the American officials that Steinmetz was a brilliant German scientist who could highly benefit American research programes and thus, he was able to move to the United States.

Steinmetz began working together with Rudolf Eickemeyer in Yonkers, New York. There, he started publishing in the field of magnetic hysteresis. Eickemeyer then owned a company that developed transformers for use in the transmission of electrical power among other mechanical and electrical devices. Back then, Thomas Edison and General Electric became aware of Steinmetz‘s work and began to acquire his patents and services. The Ford company also heard of Steinmetz‘s achievements and they called in the engineer because they had a problem with their giant generator. It is believed that Steinmetz listened to the generator all night, sketching computations on a notepad. Then, he climbed up the generator and proceeded to make chalk marks on its side. He then asked Ford‘s workers to replace sixteen windings from the field coil which solved the problem. The bill presented to Henry Ford however wasn’t a joke, since Steinmetz asked for 10.000$. When Ford asked for an itemized bill, Steinmetz responded: “Making chalk mark on generator: $1. Knowing where to make mark: $9,999“. [1]

Steinmetz‘s contributions to the field highly influenced AC circuit theory and analysis. It became less complicated and less time-consuming. Probably one of his most important publications in the field was Complex Quantities and Their Use in Electrical Engineering. Steinmetz presented his work in July 1893 and it was published in the American Institute of Electrical Engineers. In it, he managed to simplify these complicated calculus-based methods to “a simple problem of algebra“.

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