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 IGBT or Insulated Gate Bi-polar Transistors are typically semiconductor devices aka.  controlled switches,  which find their applications in Power Electronics circuits such as Inverters, and electrical drives.

IGBTs are used for higher power ratings where as Power MOSFETs are used for lower power ratings in an electrical drive circuit.

The use of IGBTs in a VFD (Variable Frequency Drive) offers the following advantages :

* High speed switching 

* Low power loss hence highly efficient 

* Self commuting ( Does not require turn off circuits)

* Simple and easy to control ( buy implementing suitable Pulse Width Modulation scheme )

* Lower cost 

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Answer : Because it has a higher switching frequency and heat tolerance.

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Answer : Advantages of Variable Frequency Drive (VFD)

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Answer : construction of IGBT

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Answer : 1. IGBT uses vertically oriented structure. IGBT use vertically oriented structure to reduce the resistance and to increase the current flow area. Hence IGBT uses vertically oriented ... DC circuit applications. Hence punch through IGBT structure are more popular and are widely used.

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Answer : No, IGBT is not the current controlled device. IGBT is a voltage controlled device. IGBT have combine qualities of MOSFET and BJT. The high switching speed of MOSFET and low conduction losses of BJT. Also, IGBT which stands for Insulated Gate Bipolar Transistor have high input impedance.

Answer : IGBT is a bipolar device.

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Answer : The number of terminals present in IGBT is 3

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Answer : 1) AC and DC motor drives 2) SMPS 3) Inverters 4) Choppers 5) Solid-state Relays 6) solid-state Contactors

Answer : Yes IGBT is costlier than BJT and MOSFET.

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Answer : Applications of IGBT: 1. The insulated gate bipolar transistor (IGBT) is used Ac and DC motor drivers. 2. The IGBT is used in unregulated power supply (UPS) system. 3. The IGBT is used to ... an isolated-gate FET for the control input and a bipolar power transistor as a switch in a single device.

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