If the motor is rotated at a speed different from the synchronous speed, ie different from the speed of the rotating field, the rotor winding must be capable of producing mechanisms toshiba 0054dpsa31a-p that may allow cutting of the magnetic field lines of the field and, through of the laws of electromagnetism, they must allow the circulation of induced currents. From the theoretical point of view, it can be stated that the higher the load, the higher the torque required to drive it.
Therefore, in order to obtain the conjugate, the speed difference must be considerably greater, so that the induced currents and the fields produced are also higher. In this way, as the load becomes larger, it will reduce to the engine speed. In case the load is zero motor, the rotor can rotate with synchronous rotation. Among the differences, the main difference between the speed of the motor n and the synchronous speed ns is called slippage s, which can be expressed in rpm, as a fraction of the synchronous speed.