Water-Cooled IGBT Stacks
IGBT Stack platforms up to 6MVA – standards for water-cooled inverter
Water-Cooled IGBT Stack Benefits
The SEMISTACK RE and SKiiPRACK water-cooled platforms offer a pre-qualified power assembly ready for integration following rigorous qualification tests and the latest environmental standards (IEC 60721-3). The platform design has been optimised to achieve the ideal balance between costs and performance for a water-cooled power inverter in the megawatt power range. They are designed for applications requiring a high degree of reliability and a long service life of up to 20 years. The design and footprint enable compact integration into standard industrial cabinets, making high power of up to 6MVA possible. Specified for wind turbine applications, the SEMISTACK family boasts excellent IGBT cycling capability and a high capacitor bank lifetime, reducing maintenance requirements.
Water-Cooled IGBT Stacks Product Family
The SEMISTACK RE platform offers a standard inverter size 1500 x 230 x 510mm (HxWxD) to fit two power sub-assemblies into a 600 x 600 x 2000mm cabinet. The standard size has a current distribution between 1000A and 1400A. For applications with lower current rating or with a stronger constraint on the cabinet size, a smaller inverter size HWD 1250 x 230 x 510mm offers continuous output current rated from 600A to 900ARMS.
The SKiiPRACK platform consists of a cell 525 x 375 x 470mm (HxWxD) to be assembled with other cells to create a functional unit in standard cabinets 600mm deep and 2000mm high. A cell can integrate an H-bridge, a 1-phase leg + brake chopper or 12-pulse rectifier, and combination of them can create 3-phase inverter, 4-quadrant converter or 3-phase rectifier and inverter. The output current range offers scalability from 600A to 1200A continuous.
Water-Cooled IGBT Stacks Short Facts
- Off-the-shelf product range
- 2 and 4-quadrant 3-phase converter
- IGBT inverter power density of up to 10.4kVA/L
- Long life expectancy
Water-Cooled IGBT Stacks Key Features
- Maximum continuous output current from 600A to 1400ARMS
- DC voltage of up to 1250V
- Inverter output voltage of up to 690VAC
- DC-link polypropylene capacitor bank lifetime rates at 100,000 hours at 40°C
- Analogue measurements for Theatsink, VDC, Iout
- CAN Interface (configuration & monitoring)
Water-Cooled IGBT Stacks Applications
The SEMISTACK RE and SKiiPRACK platforms comply with wind turbine requirements, making it possible to build 4-quadrant converters that are suitable for use with synchronous generators and double fed induction generators, with an optional brake chopper design. The platform flexibility allows for the requirements of solar central inverters to be met with a continuous DC bus voltage of up to 1250VDC. Alternatively, SEMISTACK platforms can be used in low-voltage applications requiring high power and a high degree of reliability, such as 3-phase inverters in a shipyard or in a battery energy storage unit installed close to renewable energy power plants.
Water-Cooled IGBT Stacks Product Range
The SEMISTACK RE and SKiiPRACK water-cooled platforms offer various inverter sizes to fit two power sub-assemblies into a 600 x 600 x 2000mm cabinet. The standard size has a current range between 1000A and 1400ARMS. For applications with lower current ratings or with tighter cabinet size constraints, a smaller inverter size is available with a continuous output current rated for up to 900ARMS. Both platforms employ the SKiiP IPM product family, which integrates IGBT gate driver and monitors analogue outputs (temperature, output current and DC bus voltage). As an option, a CAN interface is also available to monitor the SKiiP. To increase power capacity up to 6MVA, SEMISTACKs can be used in parallel, connected together through the DC bus and controlled all-in-one using a paralleling board. Optionally, SEMISTACK platforms are also available integrated into an industrial cabinet with suitable AC and/or DC filters, electrical and hydraulic distribution systems.