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
Grave Circle A, Mycenae the traditional time of the Trojan War (13th-12th century BC), in which Agamemnon is supposed to have participated. Grave Circle A, Mycenae Grave Circle A is a 16th-century BC royal cemetery situated to the south of the Lion Gate, the main entrance of the Bronze Age citadel of Mycenae in southern Greece. This burial complex was initially constructed outside the fortification walls of Mycenae, but was ultimately enclosed in the acropolis when the fortifications were extended during the 13th century BC. Grave Circle A and Grave Circle B, the latter found outside the walls of Mycenae, represent one of the