Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 471
er thanacceleration. The common method used for obtaining this speed 462 N. W. Storer. [J.F.I. control with direct-current motors is to connect the motors in dif-ferent series and series-parallel combinations. Fig. 3 shows threespeeds obtained by connecting the motors: First, all in series soas to… … 10000 20000 30000 40000 50000 60000 70000 80000 90000 100000pounds tractive effort completely. Fig. 4 shows the addition of six more runningspeeds, rnaking nine in all. These additional speed curves areobtained by varying the effective turns on the motor field. Withthe use of these field control…
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