Unit 1- Power Semiconductor Devices

Uncontrolled Device

• SCR

• Diode

• MOSFET

• IGBT

Uncontrolled Device

• SCR

• Diode

• DIAC

• IGBT

Reverse bias Conduction Device

• SCR

• Diode

• DIAC

• IGBT

Semi-controlled Device

• SCR

• Diode

• MOSFET

• IGBT

Fully-controlled Device

• SCR

• Diode

• MOSFET

• DIAC

Controlled On & uncontrolled off Device

• SCR

• Diode

• MOSFET

• DIAC

The R triggering method

• it conduct between 0 to 180 degree

• It conduct 0 to 360 degree

• It is not conduct

• it conduct bw 90 to 180

The RC triggering method

• it conduct between 0 to 180 degree

• It conduct 0 to 360 degree

• It is not conduct

• it conduct bw 90 to 180

The UJT trigger or conduct with respect

• Main SCR

• variable R and charge of C

• Load

• Auxiliary SCR

Commutation of main SCR using_______

• None of the answer

• R triggering

• RC triggering

• auxiliary circuit