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
Wenxiang diagram Wenxiang diagram The wenxiang diagram, also known as the wenxiang graph, was proposed in 1997 by Kuo-Chen Chou (周国城), Chun-Ting Zhang (张春霆), and Gerald M. Maggiora for helping intuitively analyze the disposition of amphiphilic alpha helices in heteropolar environments It is closely related to the earlier 2D diagram called a "helical wheel", which is a slightly idealized projection of the Calphas down the helix axis, also with one-letter-code labels and color-coded symbols to show the sequence and its properties. This diagram is named after the mosquito coil (), a coiled incense for repelling mosquitos, because of its similar shape. Because