PM-P422 THREE PHASE SYNCHRONOUS INDUCTION MOTOR (CUT MOTOR)
Electrical motor in general is an electro-mechanical device that converts energy from electrical domain to mechanical domain. Based on the type of input we have classified it into single phase and 3 phase motors. Among 3 phase motors, we mostly sue induction motors and synchronous motors. When three-phase electric conductors are placed in certain geometrical positions (In certain angle from one another), then an electrical field is generated. Now the rotating magnetic field rotates at a certain speed, that speed is called synchronous speed. Now if an electromagnet is present in this rotating magnetic field, the electromagnet is magnetically locked with this rotating magnetic field and rotates with the same speed of rotating field.
Synchronous motors are called so because the speed of the rotor of this motor is the same as the rotating magnetic field. It is a fixed speed motor because it has only one speed, which is synchronous speed, or in other words, it is in synchronism with the supply frequency. Synchronous speed is given by
Where, f = supply frequency and p = no. of poles