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
What a Friend We Have in Jesus What a Friend We Have in Jesus "What a Friend We Have in Jesus" is a Christian hymn originally written by preacher Joseph M. Scriven as a poem in 1855 to comfort his mother who was living in Ireland while he was in Canada. Scriven originally published the poem anonymously, and only received full credit for it in the 1880s. The tune to the hymn was composed by Charles Crozat Converse in 1868. William Bolcom composed a setting of the hymn. The hymn also has many versions with different lyrics in multiple languages. The "Handbook to the Lutheran Hymnal" notes,