Answer / Devendra Pratap Singh

This seems to be a symbolic representation in electrical engineering, but without additional context it's difficult to provide an accurate answer. However, assuming 'R' represents resistance and 'l' represents length, the equation could be R = l/a where 'a' might represent cross-sectional area of the resistor.

what is a motor

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bitumar

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I have a drawing of a wound rotor induction motor for a crane. This crane motor has 5 forward speeds & 5 reverse speed implemented of course with different amount of resistance for each speed setting selected. What has got me scratching around is the fact that 8 of the 10 speed selections switch in uneven (unbalanced) amounts of resistances on each of the 3 connections to the motor's rotor.Can this be possible? I would have assumed this would produce unbalanced rotor currents and therefore vibration in the motor. I would greatly appreciate anyone's comments on this. Many thanks, Confused.

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2 Answers  

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