What is the working principle of induction generator?

What is the working principle of induction generator?

Principle of operation. An induction generator produces electrical power when its rotor is turned faster than the synchronous speed. For a typical four-pole motor (two pairs of poles on stator) operating on a 60 Hz electrical grid, the synchronous speed is 1800 rotations per minute (rpm).

What are the types of induction generator?

Generally, there are two types of induction generators widely used in wind power systems – Squirrel-Cage Induction Generator (SCIG) and Doubly-Fed Induction Generator (DFIG).

How does a motor generator work?

motor generator, also called Motor-generator Set, an electric motor coupled to an electric generator to convert electric power from one from to another. The motor operates from the available electric power source, and the generator provides power of the characteristics desired for the load.

What is the efficiency of induction generator?

Induction generator at single-phase C2C balanced condition has higher efficiency at higher capacitor and lower speed such as at 45µF capacitor bank, around 1 kW load and 1450 RPM speed has the highest efficiency i.e. 88%. The reason for this much higher efficiency is the reliable speed and capacitor bank.

Which motor is used in generator?

Rule #1: For generation of DC voltage select a brushed DC motor or use a brushless EC (BLDC) motor with voltage rectifier. For the generation of AC voltage, select a brushless EC motor and connect 2 phases only. Hall sensors are not needed on brushless motors.

What are the advantages of induction generator?

Advantages of Induction Generators It requires less maintenance. It is relatively cheaper. It possesses a small size per kW output power that means high energy density. It runs in parallel without hunting.

What is difference between induction generator and induction motor?

An induction generator looks a lot like an induction motor used in industry and it is, the difference is when the machine is rotated faster than its normal operating speed, an induction generator produces AC electricity.

Who invented the induction motor?

The induction motor with a cage was invented by Mikhail Dolivo-Dobrovolsky about a year later in Europe. Technological development in the field has improved to where a 100 hp (74.6 kW) motor from 1976 takes the same volume as a 7.5 hp (5.5 kW) motor did in 1897.

What are the factors affecting the starting current of induction motor?

There are two important factors to be considered in starting of induction motors: 1. The starting current drawn from the supply, and 2. The starting torque. The starting current should be kept low to avoid overheating of motor and excessive voltage drops in the supply network.

How to start 3-phase induction motors?

The most usual methods of starting 3- phase induction motors are: For slip-ring motors Rotor resistance starting For squirrel-cage motors Direct-on -line starting Star-delta starting Autotransformer starting. 1. Rotor resistance starting

What is an induction motor transformer?

An induction motor is sometimes called a rotating transformerbecause the stator (stationary part) is essentially the primary side of the transformer and the rotor (rotating part) is the secondary side. Induction motors are widely used, especially polyphase induction motors, which are frequently used in industrial drives.