How can you control a speed of an induction motor?

Speed Control of Three Phase Induction Motor

  1. V / f control or frequency control.
  2. Changing the number of stator poles.
  3. Controlling supply voltage.
  4. Adding rheostat in the stator circuit.

How is an induction motor controlled?

In this method, speed of an induction motor is controlled by injecting a voltage in rotor circuit. If we inject emf which is in phase with the rotor induced emf, rotor resistance will decrease. Thus, by changing the phase of injected emf, speed can be controlled.

What is induction motor and how it works?

✓ An induction motor (also known as an asynchronous motor) is a commonly used AC electric motor. ✓ In an induction motor, the electric current in the rotor needed to produce torque is obtained via. electromagnetic induction from the rotating magnetic field of the stator winding.

Why starters are used in induction motor?

⇒ The starter is a device which is basically used to limit the starting current by supplying reduced voltage to the motor at the time of starting. From the expression of rotor current it can be seen that the current at start can be controlled by : By reducing the supply voltage at the time starting.

What is the principle of motor control?

Motor Control Theories include the production of reflexive, automatic, adaptive, and voluntary movements and the performance of efficient, coordinated, goal-directed movement patterns which involve multiple body systems (input, output, and central processing) and multiple levels within the nervous system.

Where is induction motor used?

These are the most common type of AC motor and are important to industry due to their load capacity, with Single-Phase induction motors being used mainly for smaller loads, for example in household appliances whereas, Three-Phase induction motors are used more in industrial applications including compressors, pumps.

What are the 2 types of induction motor?

Single-phase induction motors and three-phase induction motors are the two main types of induction motors.

What are the two main types of induction motor?

Induction motors are classified into two types namely single phase induction motor and three-phase induction motor. As their name suggests, a 1-phase induction motor is connected to a single-phase AC power supply whereas the 3-phase induction motor can be connected to a three-phase AC power supply.

How does an induction motor start?

When the supply is connected to the stator of a three-phase induction motor, a rotating magnetic field is produced, and the rotor begins rotating and the induction motor starts. At the time of starting, the motor slip is unity, and the starting current is very large.

What are the applications of induction motors?

Used in almost every process, induction motors are mainly used in water pumps, kitchen appliances, fans and air conditioners, automobiles and common industrial machinery like boiler pumps and compressors.

What is three phase motor control?

Speed Control of Three Phase Induction Motor . A three phase induction motor is basically a constant speed motor so it’s somewhat difficult to control its speed. The speed control of induction motor is done at the cost of decrease in efficiency and low electrical power factor.

What is induction motor drive?

Induction motors are largely utilized in drive applications like fixed-speed and variable-frequency drive. Advancement in power electronics is expected to increase the market share of the induction motor market. Induction motor also serves as an alternative of a permanent magnet in the electric vehicles.

What is three phase induction?

A three phase induction motor runs on a three phase AC supply. Construction of a 3 phase induction motor. Just like any other motor, a 3 phase induction motor also consists of a stator and a rotor. Basically there are two types of 3 phase IM – 1.