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Rewarded with the Semikron Young Engineer Award 2018, ACDC Cube is a single-stage, bidirectional and high-frequency isolated power conversion system. ACDC Cube also uses a novel control method to do the interface between the Alternate Current (AC) distribution network and a battery pack, or other Direct Current (DC) sources/loads, delivering higher power quality.  

ACDC Cube has lower total volume and weight and is more durable and reliable than standard solutions , namely voltage source converters. Due to its innovative features, ACDC Cube is especially suitable to applications where power systems dimensions have very tight limits.


Challenge | Opportunity

The need to integrate renewable energy sources and heavy loads such as electric vehicles in the low voltage grid is demanding for more flexible and reliable solutions such as community energy storage. Moreover, current power conversion systems are limited in terms of functions (eg. DC-DC) or have big dimensions since they were designed for off-board applications.

INESC TEC engineers have developed ACDC Cube to offer new options for micro-generation systems, including the bidirectional conversion of electrical energy between home batteries or electrical vehicles (DC) and the public grid (AC), or any other devices where dimensions restrictions are critical.

Main Advantages

  • Compact solution with reduced weight and volume achieved through a new topology (hardware);
  • Improved power quality in the grid interconnection due to the use of a new space vector modulation;
  • Higher durability and reliability by using less capacitors;
  • Safe operation provided by galvanic isolation.


  • Vehicle-to-grid (V2G), enabling the reciprocal flow of power between an electric vehicle (EV) and the grid;
  • Aeronautical and aerospace vehicles where power converters' size is limited.

  • Technology Reference

  • Commercial Rights

  • Development Stage

    Lab prototype (TRL 3-4)
  • Further Information

    <div class=""><a href="" target="_blank">US9973107 (B2)</a></div> <div class=""><a href="" target="_blank">JP2017528102 (A)</a></div> <div class=""><a href="" target="_blank">EP3180849 (A1)</a></div> <div class=""> <p>Semikron Young Engineer Award 2018</p> </div>
  • IPR Status

    Patent Granted
  • Licensing Availability

  • Industrial Categories

  • Tags

    Power Conversion System, Energy Storage, Electrical mobility, Smart grids, Renewables, Efficiency, Power electronics