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 Perfect Circle well commercially; peaking at fourth, twelfth, and fourteenth on the "Billboard" Mainstream Rock chart respectively. Activity began slowing down for the band by late 2000, with Keenan returning to Tool to finish the recording of what would be their next album, "Lateralus". Keenan returned to A Perfect Circle to tour from January to March 2001, until returning to Tool again for the rest of 2001 to release and tour in support of "Lateralus". Initial plans were for Howerdel to collaborate long-distance on writing new A Perfect Circle material with Keenan while he toured with Tool, by sending ideas back and