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
M. A. Yewdale subjects, no matter what the medium or genre, and was respected and cherished by those few who knew her as, "a national treasure". In 1999, Yewdale was heralded by Canadian art icons, Jack Shadbolt and Doris Shadbolt, as being the Cézanne/Monet of Canada, in a letter to the Mayor of the City of Burnaby, British Columbia. She graduated from the original Vancouver School of Art (1957–1961) and from the University of British Columbia (1963–1965) majoring in Fine Arts and philosophy, and culminating in a Bachelor of Fine Arts degree. M. A. Yewdale M. A. "Mer" Yewdale (1908–2000) was an early