News Release
Fuji Electric Releases IGBT Module Series for AT-NPC 3-level 12-in-1 Integrating 3-phase AT-NPC circuitry into a single package to reduce equipment size

April 17,2013
Fuji Electric Co., Ltd.

Tokyo, April 17, 2013 - Fuji Electric Co., Ltd. (TSE:6504) today announced the release of the IGBT Module Series for AT-NPC 3-level 12-in-1.

1. Purpose

Fuji Electric originally developed an advanced T-type neutral point clamped (AT-NPC) 3-level circuit system1 in February 2010 that significantly reduces power loss, and in February 2011, it released insulated gate bipolar transistor (IGBT) modules2 that employ this circuitry.

The IGBT Module Series for AT-NPC 3-Level 12-in-1 released today by Fuji Electric contain essential circuitry to drive power electronic equipment in a single package. The modules enable reductions in the size of power electronic equipment such as inverters and uninterruptible power system (UPS) equipment.

2.Product Features

IGBT Module Series for AT-NPC 3-level 12-in-1 Integrating 3-phase AT-NPC circuitry into a single package to reduce equipment size

*1.  Press release: https://www.fujielectric.com/company/news/2010/10020401.html
This technique has been awarded the 60th OHM Technology Award of The Promotion Foundation for Electrical Science and Engineering.

*2.  Press release: https://www.fujielectric.com/company/news/2011/11021701.html

*3.  Compared with 2-level IGBT under the following conditions: 20kVA inverter operating at 7kHz carrier frequency, 700V power supply, and 30A output current (effective value).

About 3-level Conversion Circuit and RB-IGBT

The 3-level conversion circuit reduces switching loss because of half of the power supply voltage in output swing by setting 3-level output voltage compared with the ordinal 2-level circuit. Furthermore, it reduces conduction loss by using Fuji Electric's proprietary RB-IGBTs, which eliminate reverse blocking diodes. These improvements significantly reduce power loss and achieve high efficiency power conversion.

3. Outline of Specifications

4. Main Applications

Inverters, UPS, power conditioners for household-use photovoltaic systems, etc.

5. Product Availability

Begins taking orders in April 2013

6. Product Inquiries

Semiconductor Sales Division
Fuji Electric Co., Ltd.
Telephone:81-3-5435-7018

Circuit Diagram of IGBT Module for AT-NPC 3-level 12-in-1

IGBT Module Series for AT-NPC 3-level 12-in-1 Integrating 3-phase AT-NPC circuitry into a single package to reduce equipment size

RB-IGBT is circled in red, IGBT and FWD are circled in blue. It contains circuitry for three conventional modules in a single package (module), taking up less space than the sum of three conventional modules.