slides

Topic 2
High-Power Semiconductor Devices

Power Diode
SCR Thyristor
Gate Turn-Off Thyristor (GTO)
Integrated Gate Commutated Thyristor (GCT)
Insulated Gate Bipolar Transistor (IGBT)
Switch Series Operation
Lecture Topics
High-Power Semiconductor Devices

Device Rating
High-Power Semiconductor Devices

4500V/800A press pack and 1700V/1200A module diodes
Power Diode

Press pack device:
Double sided cooling
Low assembly cost and high power density
Preferred choice for high voltage high power applications
Heatsink Assembly
Power Diode

4500V/800A and 4500V/1500A SCRs
SCR Thyristor

Switching Characteristics
SCR Thyristor

Main Specifications
12000V/1500A SCR Thyristor
SCR Thyristor

4500V/800A and 4500V/1500A GTOs
Gate Turn-Off (GTO) Thyristor

Symmetrical versus Asymmetrical GTOs
Gate Turn-Off (GTO) Thyristor

Switching Characteristics
Gate Turn-Off (GTO) Thyristor

Main Specifications
4500V/4000A Asymmetrical GTO Thyristor
Gate Turn-Off (GTO) Thyristor

6500V/1500A Symmetrical GCT
GCT = Improved GTO + Integrated Gate + Anti-parallel Diode (optional)
Integrated Gate Commutated Thyristor (GCT)

GCT Classifications
Integrated Gate Commutated Thyristor

Switching Characteristics
Integrated Gate Commutated Thyristor

Main Specifications
6000V/6000A Asymmetrical GCT
Integrated Gate Commutated Thyristor

1700V/1200A and 3300V/1200A IGBT modules
Insulated Gate Bipolar Transistor (IGBT)

Static V-I Characteristics
Switching characteristics
IGBT Characteristics
Insulated Gate Bipolar Transistor (IGBT)

Main Specifications
3300V/1200A IGBT
Insulated Gate Bipolar Transistor (IGBT)

Cause of Voltage Imbalance
Device Series Operation

Equal Voltage Sharing
S1, S2, S3:
GTO, GCT or IGBT Voltage Sharing:
v1 = v2 = v3 in steady state
and transients
Static Voltage Sharing:
Rv
Dynamic Voltage Sharing:
Rs and Cs
Device Series Operation

Active Overvoltage Clamping (AOC)
Assumption:
S1 is turned off earlier than S2
VCE1 is clamed to Vm due to
active clamping.
Suitable for series IGBTs
Not applicable to GCTs
Device Series Operation

Summary