E. F. Fuchs

TL;DR: In this article, the average values for the exponents of a weighted harmonic factor are derived for transformers, induction and universal machines as they occur in electrical appliances, based on a theoretical loss analysis and on experimentally obtained temperature data.

TL;DR: In this article, a more comprehensive study on the optimization of a three-phase induction motor design was performed, including the relationship between motor cost, efficiency, and power factor; the effect of the properties of the electrical steel; and other effects as they occur in an optimal design.

TL;DR: In this article, the effects of harmonics on single and three-phase transformers including single-phase induction machines as they occur in electrical appliances are investigated. And the results show that single-and three-phases induction machines are more prone to temperature rises due to voltage harmonics than transformers.

TL;DR: In this paper, two advanced optimization techniques, the boundary search along active constraints and the Han-Powell method, have been compared as applied to a 5-hp three-phase induction motor design.

Abstract: The sensitivity of television sets, induction watthour meters and universal motors to harmonics and fractional harmonics, as they occur in home appliances, is derived analytically and experimentally. This study shows that television sets are very sensitive to fractional harmonics. Calculations and measurements performed with single-phase watthour meters show that the harmonic torques within the aluminum disk are always positive and accelerate the disk. Universal machines are not as sensitive to voltage harmonics as compared with induction machines. The work described has been supported by the U.S. Department of Energy.