News
13/05/2010

Helical winding high current chokes for efficient inverter applications

foto de la noticia

PREMO Group has successfully introduced helical winding into our technology portfolio for the design and manufacturing of high-efficiency chokes for solar and wind power electronic inverters. This technology has been traditionally used in other applications, such as welding but has also been proved to be suitable for designing chokes in renewable energies power conversion applications.

 
By means of reducing choke’s RDC and RAC, as well as increasing the resonant frequency, this helical winding technology allows Premo to offer accurate and efficient designs.
 
The choke is designed with ferrite core and distributed air gap which allows excellent efficiency for the whole power range (5%, 50% and 100%)
 
We encourage you to study the eventual use of this high-efficiency winding technology in new or existing designs.  
 
  • Double choke configuration
  • Power up to 6kW
  • Inductance = 1.4 mH
  • Nominal current = 26 Arms
  • Ripple current = 9 Amp p-p @ 16 kHz
  • Peak current without saturation > 41.3 Amps
  • Total losses < 28 Watts
  • Resonant frequency > 500 kHz
  • Winding to Chassis isolation > 6000 Vac
  • Size = 177x142x80mm