IGBT Inverter Stacks deliver up to 16MW power rating

13th February 2014

IXYS

Staff Reporter

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With a power rating of up to 16MW, a range of IGBT phase leg stacks has been introduced by IXYS. The standard, three-level, press-pack IGBT phase leg stacks are available at 3 voltages - 3.3kV, 6.6kV and 10kV.

The 3.3kV option is available as a single stack, and is comprised of 4 2400A press-pack IGBTs plus the anti-parallel and neutral point clamp diodes. The phase leg is rated at 8MW. The 6.6kV and 10kV options comprise discrete stacks of 1600A reverse conducting press-pack IGBTs and fast diodes which can be configured into the phase leg. Each phase leg would require 2 IGBT stacks and 1 diodes stack. The 6.6kV stacks are rated at up to 12MW and comprise of 4 series devices, whilst the 10kV units are rated up to 16MW and stack 6 series devices. Actual power ratings will depend on how the customers configure their control systems.

Direct water cooling allows for effective heat dissipation away from the devices and pre-loaded disc spring clamping to evenly distribute the applied force across the entire surface area of the device. Stacks use an isolated clamping rod system to limit the occurrence of eddy currents within the unit. The IGBT stacks also incorporate gate trigger boards and snubber circuits.

“These new introductions are targeted for project development and will allow our customers quicker access to prototype development. IXYS UK can then either continue to supply a customised stack to their specifications or the components to fit their own design,” commented Frank Wakeman, IXYS UK’s Marketing and Technical Support Manager.

Applications include medium voltage drives for industrial, marine and renewable energy infrastructures including wind generation, plus very large drives for use in the oil, gas and steel industries. Stack part numbers are: a 3.3 kV unit XA1600GV45WT, 6.6kV units XA1000GV45WT/B (IGBT) and XA1000TV45WE/B (diode) and 10kV units XA1000GV45WT/A (IGBT) and XA1000TV45WE/A (diode).