Press Release


IGBT Power Modules for 3-level UPS inverters

Improved efficiency in DC/AC conversion: 5 – 80kVA


Nuremberg, June 2008 - SEMIKRON introduces a new topology to the current SEMITOP® IGBT product range now also for 3-level inverters. The topology integrates IGBT technology with lower switching and conduction losses which show 60% less losses compared to 2-level inverters. The SEMITOP® module was designed for low commutation inductivity in contrast to half bridge modules. The improved efficiency of the DC/AC conversion is available for UPS applications in the power range from 5kVA to 80kVA.


The 3-level inverter is a cost-effective solution because one single module replaces two modules used for a standard 2-level half-bridge topology. The topology for the 3-level inverter is realized by the series connection of IGBTs with which it is possible to obtain higher reverse IGBT blocking voltages. By merely connecting three of these modules, it is possible to achieve a complete 3-phase 3-level inverter topology with maximised electrical and thermal efficiency. Due to the sinusoidal output waveform, it is possible to reduce harmonic contents and output filters. In comparison to a standard 2-level half bridge inverter overall dimensions as well as a cost saving of 25% is achieved.


Current rating is from 20A to 150A by using 600V IGBT reverse blocking voltages. Modules operate with input power from 5kVA to 80KVA in power supply applications. The IGBTs for 3-level inverters are available in 2 housings: SEMITOP®3 (55x31mm2) for modules with current rating from 20A up to 50A and SEMITOP®4 (60x55mm2) for modules with current rating from 75A up to 150A.


SEMITOP® is an isolated power module with a height of only 12mm which can be quickly assembled into a complex circuit thanks to the base plate free technology with only one mounting screw to fixate to the heat sink, and then automatically soldered to the PCB. The pressure contact technology and single mounting screw guarantee low thermal resistance and the mechanical stress-free design ensures high power cycling capability. The single mounting screw offers a fast, easy assembly. The performances are confirmed by an extensive qualification program consisting of 17 different qualification and tests performed for more than 10000h.


Photo: SEMITOP® - f or 3-level UPS inverter


About SEMIKRON: Founded in 1951, German-based SEMIKRON is a family enterprise that employs 3000 people worldwide. SEMIKRON comprises of a global network of 35 companies that guarantees fast and competent on-site customer care. According to a study carried out by IMS, a leading Market Research Institute, SEMIKRON is the market leader in the field of diode/thyristor modules, enjoying a 34% share of the worldwide market.


Products: SEMIKRON’s product range consists of 21,000 different power semiconductors, including chips, discrete diodes/thyristors, power modules (IGBT / MOSFET / diode / thyristor), driver and protection components and integrated subsystems.


Applications: "SEMIKRON inside" has become a trade mark for young developing markets such as electric drives, wind power generators, solar power, electric vehicles, welding machines, lifts, power supplies, conveyor belts and trams. As a significant innovator in the power electronics sector, many of SEMIKRON’s progressive developments have been accepted as industrial standards.


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IGBT Power Modules for 3-level UPS inverters

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