Harmonics and Harmonic Frequency in AC Circuits

There are two types of circuit. 1. Linear Circuit 2. Non Linear circuit In a linear circuit the current follows the voltage.The current increase or decrease proportionally with increase/decrease of voltage. The V-I characteristics of the devices is linear is called linear devices. The example of the linear device is a resistor. The linear devices … Read more

Why Induction Motor is called Asynchronous Motor?

An induction motor is called asynchronous motor because the actual speed of the motor is not equal to the synchronous speed of the motor. The synchronous speed of the motor is always more than the actual speed of the motor. If the actual speed of the motor(N) is equal to the synchronous speed (Ns), then no torque will … Read more

Why the Slip never Zero in an Induction Motor?

A rotating magnetic field is produced when the three phase supply is fed to the stator. The magnetic field travels the air gap length and cut the rotor conductor. Voltage is induced in the rotor conductor when the magnetic flux is cut by rotor conductor.The voltage induced in the rotor conductor can be expressed as; … Read more

What is Synchronous speed? Relationship between speed and Frequency

Synchronous Speed When three phases which are 120 degree-electrical apart are fed to the stator winding of the induction motor, a rotating magnetic field is produced which rotates in the space and time. The speed of the rotating magnetic field is called the synchronous speed of the motor. The synchronous speed is denoted as Ns. … Read more

Slip Speed in an Induction Motor

A rotating magnetic field is produced when three phase supply is fed to stator of an induction motor. The rotating rotating magnetic field has constant magnitude and has a circular rotation.The speed at which rotating magnetic field rotates is known as a synchronous speed of the motor. The synchronous speed depends on the number of poles … Read more