Circle diagram Circle diagram First conceived by A. Heyland in 1894 and B.A. Behrend in 1895, the circle diagram is the graphical representation of the performance of the electrical machine drawn in terms of the locus of the machine's input voltage and current. The circle diagram can be drawn for alternators, synchronous motors, transformers, induction motors. The Heyland diagram is an approximate representation of circle diagram applied to induction motors, which assumes that stator input voltage, rotor resistance and rotor reactance are constant and stator resistance and core loss are zero. Another common circle diagram form is as described in the two
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