Premo has developed a series of high energy storage chokes for use in power conversion applications such as dc/ac and ac/dc converters. The Multi-E 65, 71 and 80 series offer high efficiency for currents of 40 to 50A, while the newly introduced AIC series offers power ratings from 2500 W up to 100 kW (storage currents up to 150 A).
Compact size is a key benefit of the AIC series, with maximum dimensions of 320 x 270 mm (W x H), achieved by a high power density and high flux density in the core. The chokes are able to work at ripple frequencies up to 25 kHz. Low-loss design results in an efficiency in excess of 99 percent, and the products exhibit a very good inductance stability versus temperature. Inductance values range from 250 uH up to 6 mH. Single phase and 3-phase versions are available.
The AIC series technology is based on amorphous cores: The silicone iron assures permeability, linearity and high flux density capabilities, while the amorphous structure reduces the hysteresis loop losses in the core. This series covers inductances from 250uH up to 6mH; can be used for tri-phase and single-phase systems, and uses a simplified mechanical fixation to the inverter compared to similar competitor’s products. The mechanical fixation consists on an aluminum base for screws or rivets and terminal blocks to easily connect the component to the inverter. Its temperature and frequency losses are much stable and reduced: First ones are constant from -30ºC up to 120ºC allowing high operating temperatures without affecting component efficiency; the second ones are below 10W per kHz. These performances make this series suitable for the most critical and demanding applications in the market.
Note: The above text is the public part of the press release obtained from the manufacturer (with minor modifications). EETimes Europe cannot be held responsible for the claims and statements made by the manufacturer. The text is intended as a supplement to the new product presentations in EETimes Europe magazine.