Advantages, Disadvantages and Applications of IGBT
Q. Draw symbol of IGBT and state one application of each.
Q. State two advantages of IGBT.
Q. Draw symbol and characteristics of IGBT power semiconductor and its important information and application.
Q. Draw construction of IGBT. Give any two advantages of IGBT.
Full form of IGBT :- Insulated Gate Bipolar Transistor (IGBT)
Merits of IGBT (Advantages of IGBT)
- Easy to turn on and off.
- It is a voltage controlled device. Therefore driver circuit is simple and cheap.
- Low on state voltage drop. Therefore low on state power dissipation.
- Switching frequency higher than that of a power BJT.
- Does not need snubber circuit for its protection.
- It has a flat temperature coefficient of resistivity. So it is easy to connect IGBTS in parallel with each other.
Demerits of IGBT (Disadvantages of IGBT)
- It has an asymmetric blocking capacity. It cannot block high reverse voltages.
- Switching frequency is not as high as that of a power MOSFET.
- Problem of latch UPS.
- Excessive power dissipation can take place at the time of turn-off due to the “current tail” present in the turn-off characteristics.
Applications of IGBT
Some of the important applications of IGBT are
- Switching mode power supplies (SMPS).
- UPS systems (IGBT based inverters).
- AC motor controllers.
- Choppers.
- Inverters.