All ABB IGCTs are press-pack devices. They are pressed with a relatively high force onto heat-sinks which also serve as electrical contacts to the power terminals.
Because IGCTs are "form-fit-function" relatives of GTOs, it is often attractive for users of GTOs to switch to new system designs or generation updates (with minimal changes) to the more advanced IGCT technology.
The IGCT's turn-on/off control unit is an integral element of the component. It only requires an external power supply and its control functions are conveniently accessed through optical fiber connections. The device's control power consumption typically ranges from 10 - 100W.
Like the GTO, the IGCT is also optimized for low conduction losses. Its typical turn-on/off switching frequency is in the range of 500 hertz. However, in contrast to the GTO, the upper switching frequency is only limited by operating thermal losses and the system's ability to remove this heat. This feature, in conjunction with the device's fast transition between on and off state, enables short on-off pulse bursts with switching frequencies of up to 40 kHz.
IGCTs require a turn-on protective network (in essence an inductor) to limit the rate of current rise. However, in contrast to the GTO, the turn-off protection network is optional. It can be omitted at the price of a somewhat reduced turn-off current capability.
Asymmetric - click here for further information & downloading datasheets
Asymmetric IGCT devices are single devices optimized for snubberless turn-off operation. The associated recovery diodes can be chosen from our fast recovery diodes product range.
Reverse Blocking - click here for further information & downloading datasheets
Reverse Blocking IGCT is a device with an integrated series connected diode. This type of IGCT is optimized especially for current source converters and matrix converters.
Reverse Conducting - click here for further information & downloading datasheets
Reverse Conducting IGCTs are monolithical integrated freewheeling diodes. They are optimized for snubberless turn-off conditions.
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