. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . ing poles are produced. With 40 cycles the motor makes about 1,200 revolutionsper minute. The motor takes 50 volts normally ; a reduction to 30, or anincrease to over 100, docs not makeany practical difference in the course, in the first case, the heat-ing of the armature wire is greater,and in the second the heating of theiron is increased. The magnetic fieldrotates, and is produced by the arma-ture reacti
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . ing poles are produced. With 40 cycles the motor makes about 1,200 revolutionsper minute. The motor takes 50 volts normally ; a reduction to 30, or anincrease to over 100, docs not makeany practical difference in the course, in the first case, the heat-ing of the armature wire is greater,and in the second the heating of theiron is increased. The magnetic fieldrotates, and is produced by the arma-ture reaction, thus avoiding all slid-ing contacts. The field magnet iscomposed of a laminated ring withholes, in which are placed insulatedcopper bars. The free ends on bothsides are connected by copper is not easy to imagine a more sim-ple construction. The armature has90 conductors of about 40 sq. The weight of copper is 20 Fig. 46.—Brown three-phase motor, kg., the iron about 100 kg. The breadth of the armature is 20 mm., the outer diameter about 500. The rotating magnetcarries 54 copper bars, with a section of 100 sq. mm. The weight of the copper is 15 kg.;.
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
