 This is because most of the power is used to drive the motor and no electrical pulse switching is done.The system is much simpler and easier to use compared to other speed control methods available.However, the Dahlander motor has the disadvantage of fast mechanical wear and tear due to changing speeds in such a drastic ratio; this type of connection also produces high harmonic distortion during the shifting of poles as the angular distance between the power generated increases as the poles are decreased in the motor.