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when a split phase capacitor motor connected to a drum controller and running high speed and revers it?
why it still running forward
What you have is a capacitor start motor. Single phase induction motors have zero starting torque. Therefore they have a second winding with a capacitor in series with it to provide another phase (split phase) for the torque needed to start the motor. Once the motor is started there is a centrifugal switch that disconnects the starting winding. Switching the reverse switch only effects the starting circuit which is now switched off when the motor is running.