Three-phase motor

The model demonstrates the operating principle of a three-phase asynchronous motor. Mounted on the base are stator coils spaced evenly around the circumference, a rotating U-shaped magnet on a support and two replaceable rotors - with vertical slots and with a short-circuited winding. The apparatus allows for five demonstrations: obtaining a rotating magnetic field from a permanent magnet and from three coils with three-phase current, rotation of the rotor due to eddy currents and magnetic force on a current-carrying conductor, slip of the rotor relative to the field and reversing the motor by swapping two phases. The device is used in physics lessons when studying electromagnetism and the design of electrical machines.