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Racer Sharel (sharel)
Race Number 85
Date Tue, 14 Jul 2020 03:44:03 +0000
Speed 63 WPM Try to beat?
Accuracy 98.4%
Rank 5th place (out of 5)
Opponents ajaygunacr7 (1st place)

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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