DC motor reostatic speed variation

105

02:29:54

DC motor speed variation through reostates. See also voltage at the motor terminal. 

published 7 years ago

Voltransistor

7 years ago

Nice circuit! 😀 isn't resistors bad for the motor?

profFG

7 years ago

They are actually bad because of the significant lack in efficiency. Nowadays DC motor speed is regulated via power Electronics but untill the early 70s the most part of speed regulation in railroads motor was essentially made with resistors. The circuit is only a demonstration for students of this very old option in speed regulation.

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