ISOLATED BIDIRECTIONAL DUAL-ACTIVE-BRIDGE DC-DC CONVERTER WITH DUAL-PHASE SHIFT CONTROL

摘要

The present invention relates to an electrical charger 10 comprising; a power converter having a Dual Active Bridge (DAB) 12, the DAB 12 having a primary H-bridge 16 and a secondary H-bridge 18, each H-bridge having a plurality of switches 22. The charger 10 also comprising a controller 14 for controlling a switching sequence of the DAB 12, the switching sequence arranged to control an outer phase shift D₂ between the primary and secondary H-bridges 16,18 of the DAB, the switching sequence also arranged to control an inner phase shift D₁ of the primary H-bridge 16 and an inner phase shift D₁ of the secondary H-bridge 18; wherein the inner phase shift D₁ of the secondary H-bridge 18 has a direction opposite to the inner phase shift D₁ of the primary H-bridge 16.