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Premo – New 3DPower™ inductive components for power converters

PREMO, the leading manufacturer of inductive components, releases their new 11kW 3DPower™ solution 3DP-11KWHVHV, a Full Bridge LLC Transformer 150 µH + Resonant Choke 25 µH merged in 1 single unit. This innovation provides up to 40%-50% reduction in volume compared with current discrete industrial solutions for the same power management.


Most of the power converters (resonant topologies) in the market have a transformer, resonant choke and output choke. Every component has its own design, core, winding, and thermal dissipation solution. 3DPower™ is the first product to integrate two magnetics components, LLC Transformer and Resonant Choke, that share the same core and feature two orthogonal magnetic fields at all points within the core. A unique and single solution that gives a super advantage starting at the beginning of the value chain.



Advantages of 3DPower™ based products

  • Power converter design with one inductive component in mind.
  • One mechanical drawing interface to fit and connect.
  • This Full Bridge LLC Transformer and Resonant Choke merged in one, improve the MTBF.
  • Important volume and weight reduction (-40% to -50%).
  • Energy efficiency & cost-effective.
  • Carbon footprint reduction worldwide (energy reduction to produce magnetic cores). X3 Reduction of Ferrites

Once electromagnetic performance is reached, internal and external thermal links are the most important question to solve in the design of these 3DPower™ components: “Heat Dissipation”. Designing power densities and power sizes over 7kW turns in a heat increase.

3DPower™ and CoolMag™


3DPower™ use CoolMag™ (by Kadion), silicone-based compound compatible with the magnetics 100% focused on power magnetic electronics to dissipate the heat from the top of the magnetic to the liquid cooling plate of the bottom. It provides a thermal conductivity bigger than 1.7 watts/mK. The air is removed by this compound to improve the heat dissipation.

Current 3DPower Full Bridge LLC Transformer and Resonant Choke at Premo

The 3DP-11KWHVHV (11kW) is available with aluminum heatsink that acts as a direct thermal interface to the cold plate. 3DPower™ cost-saving solution is also available with 7kW and the company is developing a 22kW solution. Designs can be fully customized according to customer requirements.

The 3DPower TM 3DP-11KWHVHV Series meets the AEC-Q200 and other more restrictive customer automotive supplier standards. This greener solution has been fully tested in Premo Laboratory under real operational conditions.

Contact us for more information on Premo’s 3DPower™ components!

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