Circle diagram constant air-gap induction motor images shown here, where, The circle diagram is drawn using the data obtained from no load and either short circuit or, in case of machines, blocked rotor tests by fitting a half-circle in points O and A. Beyond the error inherent in the constant air-gap assumption, the circle diagram introduces errors due to rotor reactance and rotor resistance variations caused by magnetic saturation and rotor frequency over the range from no-load to operating speed. Steinmetz equivalent circuit Circle diagram First conceived by A. Heyland in 1894 and B.A. Behrend in 1895, the circle diagram is the
What Is a Nation? French citizen has to have forgotten the massacre of Saint Bartholomew, or the massacre that took place in the South in the thirteenth century. While many nations, such as France, begin with a feudal regime such as a monarchy, others, such as the United States and Switzerland, are formed by acts of consensual aggregation. France and many others, however, survived their feudal roots while maintaining their identity. Renan inquires what is the organizing principle? It can't be race, because France is "Celt, Iberian, German...The most noble countries, England, France and Italy, are the ones where the blood is most mixed."