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Racer Matija (kady197)
Race Number 110
Date Tue, 30 Apr 2019 13:59:24 +0000
Speed 49 WPM Try to beat?
Accuracy 94.2%
Rank 5th place (out of 5)

Text typed:

A train equipped with, say, two dc motors, is started with both motors connected in series to an external resistor. As the speed picks up, the resistor is shorted out. The motors are then paralleled and connected in series with another resistor. Finally, the last resistor is shorted out, as the train reaches its nominal torque and speed.
Electrical Machines, Drives, and Power Systems (book) by Theodore Wildi (see stats)

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