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 Letter to a Young Poet A Letter to a Young Poet A Letter to a Young Poet was an epistolary letter by Virginia Woolf, written in 1932 to John Lehman, laying out her views on modern poetry. In 1932, Woolf responded to a letter from the writer, John Lehmann, about her novel "The Waves" (1931) in which he asked her to write about her views on modern poetry. Lehmann had a mission to revitalise modern poetry, and came to the Hogarth Press to enlist their help. Virginia was enthusiastic about his suggestion of a "letter to a young poet", which she thought was "most brilliant".