why is an electric motor called DC (unidirectional) even when the the direction of the current is reversed by commutator on rotation of axle/rotor . it is clearly not unidirectional so why is it called unidirectional ??
please help asap I would bee grateful
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In 1698 Thomas Savery patented a pump with hand-operated valves to raise water from mines by suction produced by condensing steam. In about 1712 another Englishman, Thomas Newcomen, developed a more efficient steam engine with a piston separating the condensing steam from the water.
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The DC Motor or Direct Current Motor to give it its full title, is the most commonly used actuator for producing continuous movement and whose speed of rotation
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