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
A Circle in the Fire unsuccessfully attempts to burn three men in a fiery furnace when they refuse to worship the King's idol. A Circle in the Fire "A Circle in the Fire" is a short story by Flannery O'Connor. It was written in 1954 and published in 1955 in her short story collection "A Good Man is Hard to Find". A devout Roman Catholic, O'Connor often used religious themes in her work. The story involves Mrs. Cope, the owner of a farm in the South, who is visited by three teenage boys, including Powell Boyd, the son of one of her former farm workers.