Circle diagram constant air-gap induction motor images shown here, where, The circle diagram is drawn using the data obtained from no load and either short circuit or, in case of machines, blocked rotor tests by fitting a half-circle in points O and A. Beyond the error inherent in the constant air-gap assumption, the circle diagram introduces errors due to rotor reactance and rotor resistance variations caused by magnetic saturation and rotor frequency over the range from no-load to operating speed. Steinmetz equivalent circuit Circle diagram First conceived by A. Heyland in 1894 and B.A. Behrend in 1895, the circle diagram is the
What-A-Burger What-A-Burger What-A-Burger is the trading name used by a small group of restaurants which were established by entrepreneur brothers Jack Branch and Paul E. Branch Jr. and members of the Branch family beginning in 1950. With the first location at a busy traffic circle near Newport News, Virginia in the former Warwick County, they soon established additional locations in the cities of Richmond, Colonial Heights, and Petersburg, Virginia, each along busy through-traffic highway corridors. Another location was opened by a member of the Branch family in the 1950s in Greenville, South Carolina. The first Virginia store opened in 1950 by