What are two types of induction motor?

What are two types of induction motor?

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

Why starters are used in induction motor?

Let us study in detail why starter is required for an induction motor. At starting time, the speed of the motor is zero and slip is at its maximum i.e. unity. So magnitude of the rotor induced emf is very large at start.

What is an induction motor used for?

AC induction motors are the most common electric motors in the world. These simple, reliable and economical motors are found in refrigerators, washing machines and furnaces, as well as conveyors, pumps, winders, wind tunnels and other industrial equipment.

What is the principle of induction motor?

Working Principle of Induction Motor The motor which works on the principle of electromagnetic induction is known as the induction motor. The electromagnetic induction is the phenomenon in which the electromotive force induces across the electrical conductor when it is placed in a rotating magnetic field.

What happens when induction motor is loaded?

If the load on the induction motor is increased the current will increase to deliver the demanded power. The slip of the motor will increase with an increase of loading on the motor, and the speed of the motor will decrease accordingly.

What is the main function of a DC motor?

A direct current (DC) motor is a type of electric machine that converts electrical energy into mechanical energy. DC motors take electrical power through direct current, and convert this energy into mechanical rotation.

What are the advantages of DC motor?

Good speed control DC motors offer highly controllable speed. By changing the armature or field voltage it’s possible to achieve wide speed variation and with this level of controllability, DC motors offer the precision required by a wide range of industry applications.

What are characteristics of dc motor?

DC Motor Characteristics

• Runs on DC power or AC line voltage with a rectifier.
• Operating speeds of 1,000 to 5,000 rpm.
• 60-75% efficiency rate.
• High starting torque.
• Low no-load speeds.

Why is DC motor current so high?

Answer: The starting current is high as there is no back EMF or counter EMF present in the armature circuit because atstarting counter EMF is zero. It’s armature has very less resistance due to this it need more current at starting time. Hence DC starters are used to limit the starting current ofmotor.

How can a DC motor limit current?

4 Answers

1. Make sure the load is never so high that the motor stalls or overloads.
2. Make sure that the voltage is so low that the current through the windings will never be higher than rated.
3. Use a current controller to drive the motor that can limit the current at the given maximum.