Many application in industry needs dual speed motors. The motors work on either of the speed as selected. The speed change can be achieved by separate winding of the motor or by changing the pole connections. By and large the output torque of the motors remains same in both speed and hence the power of the motor changes with respect to speed. Application of dual speed motors are endless, to name a few “mototek” dual speed motors are being used for hoisting , positioning application for precious positioning and avoid jurking, centrifugal fan or pumps for energy saving, machine tools for batter size control and special tooling operations.