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
Happiness Is a Four-letter Word Happiness Is a Four-letter Word Happiness is a Four-letter Word is a 2016 South African romantic drama film directed by Thabang Moleya and written by Busisiwe Ntintili. Based on the novel of the same name by Nozizwe Cynthia Jele, the film tells the story of three friends trying to find their happiness while maintaining images of success and acceptability. The film revolves around three women. Glamorous trophy housewife Zaza, played by Khanyi Mbau, seems to be living the new South African dream of money, success, and loving partners. Lawyer and compulsive perfectionist Nandi, played by Mmabatho Montsho, whose life from