Alloy powder E-cores have low losses

Alloy powder E-cores have low losses at elevated temperatures and a distributed air gap for switching regulator inductors, flyback transformers, and power factor correction inductors.

CSC Korea, market leader for powdered cores, offers Sendust powder E-cores, which are made of a alloy powder, which has low losses at elevated temperatures.

Sendust E-cores have a distributed air gap which makes them ideally suited for switching regulator inductors, flyback transformers, and power factor correction inductors(PFC).

The saturation level of Sendust provides a higher energy storage capability than can be obtained with gapped ferrite E-cores, resulting in smaller core size.

Sendust E-cores are competitively priced against gapped ferrite E-cores and their distributed air gap eliminates gap loss problems associated with ferrites like EMI.

Sendust E-cores have lower losses and substantially better thermal properties when compared to powdered iron E-cores Although high grade ferrite core losses are lower than Sendust core losses, ferrite often requires low effective permeability to prevent saturation at high current levels.

Ferrite, with its high initial permeability, requires a relatively large air gap to get a low effective permeability.

This large air gap results in gap loss, a complex problem which is often overlooked when comparing material loss curves.

Simply put, gap loss can drastically increase losses due to fringing flux around the air gap.

The fringing flux intersects the copper windings, creating excessive eddy currents in the wire.

With more than twice the flux capacity of ferrite, Sendust offers significantly better DC bias characteristics.

Often in applications this can result in a 35% reduction in core size and a more robust design that utilizes the soft saturation of Sendust.

The flux capacity difference is even more dramatic at high temperatures, since the flux capacity of ferrites decrease with temperature while Sendust stays relatively constant.

With a Curie temperature of approximately 500 deg C and rated for continuous operation from -65 deg C up to +200 deg C, Sendust offers excellent performance over temperature.

Unlike powdered iron, Sendust is manufactured without the use of an organic binder.

Therefore, Sendust has none of the thermal aging concerns associated with powdered iron cores.

Sendust also has a relatively stable inductance over temperature.

Unlike some ferrite materials, Sendust does not have increasing losses over temperature.

Additionally, Sendust does not have a significant decrease in saturation flux density at high temperature, a characteristic that lowers ferrite's DC bias handling ability.

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