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Semikron has launched Skiiprack, a high-power converter/inverter platform for industrial applications, including AC/DC drives, wind power, industrial power supplies and power-conversion applications.

Skiiprack is configurable for power ratings from 150kVA up to 3MVA.

With a power density of more than 12kVA/li, Skiiprack’s design is said to be typically 25 per cent more compact than competitor products.

A single 3MVA three-phase inverter or 1.5MVA three-phase four-quadrant converter can be installed into a standard 600 x 600 x 2,000mm cabinet.

Larger configurations, such as a 3MVA four-quadrant converter, can be realised by mounting the Skiiprack side by side in a larger cabinet.

The modular Skiiprack phase block assembly is available in different versions, which are connected together to configure a complete converter/inverter as per the customer’s requirement.

Each phase assembly comprises a water-cooled cooling plate, one or two Skiip IGBT intelligent power modules, snubbers, a capacitor bank and a low-inductance DC bus bar housed in a rigid mechanical frame with a sliding mechanism for ease of servicing in case of field replacement.

One example of the range of type tests applied to the Skiiprack is 100 times thermal cycles of 10hr duration, each in accordance with IEC60068-2-14.

Other tests, including environmental, shock and vibration, additional to the usual electrical and isolation tests, ensure the overall ruggedness of the Skiiprack.

A variety of phase-assembly configurations is available.

For example, a singular phase assembly can contain four SKiiP1213GB123s to realise a complete three-phase inverter plus brake chopper at 450kVA.

Alternatively, at the high end of the power scale, one phase assembly can contain two SKiiP2403GB172s connected in parallel to form one phase of a 3MVA inverter, with three of these phase assemblies mounted in one cabinet, forming a complete three-phase converter/inverter.

Low-inductance DC busbars link the phase assemblies together and the AC connections can either be made at the front of each phase assembly or at the bottom rear of the complete assembly facilitated via interconnecting AC busbars.

A choice of either electrolytic capacitors, or polypropylene capacitors for long lifetime, is available.

The Skiiprack is available as individual phase assemblies that can be mounted into a cabinet, or already mounted into a standard electrical cabinet.

Skiiprack capitalises on the low inductance and power density of Skiip, which is said to be 20 per cent higher than competitor products.

Each Skiip IPM is fully tested during its own production process.

Every Skiiprack undergoes a full suite of tests during production, including isolation, operational load tests and short-circuit tests.

An optional burn-in is available for customers who require an elevated level of severity.

SEMIKRON, a private and financially independent family enterprise, was founded in 1951 and employs 2,900 people worldwide. The headquarters is located in Nuremberg, Germany. The company develops and produces reliable and efficient power electronic components and solutions for wind power generators, solar power, electric and hybrid vehicles, power supplies, industrial applications, electric drives, welding machines, lifts, conveyor belts and the rail industry. As a significant innovator in the power electronics sector, many of SEMIKRON’s progressive developments have been accepted as industrial standards.

A global network of 35 companies, production sites and solution centres guarantees fast and competent on-site customer support and service. The products range from 1kW to 10MW: chips, discrete diodes/thyristors, power modules (IGBT/MOSFET/diode/thyristor) to customer-specific solutions and integrated power electronic systems.  

According to a survey carried out by BTM Consult Apes, the total wind power capacity installed until 2009 was 122GW. 57GW comprises semiconductors from SEMIKRON.

As the market leader in the field of diode/thyristor semiconductor modules, SEMIKRON enjoys a 37 per cent share of the worldwide market.*

*Source: IMS-Research — 'The worldwide market for power semiconductor discretes and modules' — 2008

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