what is auto transformer starting method in three phase induction motor?

The auto transformer starting method for a three-phase induction motor involves using an auto transformer to reduce the voltage supplied to the motor during startup. This method allows for a lower starting current, minimizing stress on the electrical system and the motor itself. The auto transformer is connected in such a way that it provides a reduced voltage to the motor until it reaches a certain speed, at which point it is switched to full voltage for normal operation.