Resonant circuit comprising: - three resonant circuit input nodes (11, 12, 13) and three resonant circuit output nodes (21, 22, 23); - a transformer device comprising three primary windings (LP1, LP2, LP3) and three secondary windings (LS1, LS2, LS3) magnetically connected to each other, where the three secondary windings (LS1, LS2, LS3) are connected to the three resonant circuit output nodes (21, 22, 23); - first, second and third resonant tank devices (RT1, RT2, RT3) each connected between the respective three resonant circuit input nodes (11, 12, 13) and the respective primary windings (LP1, LP2, LP3); characterized in that - the resonant circuit is further comprising first, second and third transformer switching devices (ST1, ST2, ST3) for reconfiguring the three secondary windings (LS1, LS2, LS3) between a delta-configuration and a star-configuration; and - where the three primary windings (LP1, LP2, LP3) together with the three resonant tank devices (RT1, RT2, RT3) are configured in a delta-configuration; where each resonant tank device (RT1, RT2, RT3) comprises a resonant inductor (LR1, LR2, LR3) and a resonant capacitor (CR1, CR2, CR3) and where - the first resonant inductor, the first resonant capacitor and the first primary winding are connected in series between the first resonant circuit input node and the third resonant circuit input node; - the second resonant inductor, the second resonant capacitor and the second primary winding are connected in series between the second resonant circuit input node and the first resonant circuit input node; and - the third resonant inductor, the third resonant capacitor and the third primary winding are connected in series between the third resonant circuit input node and the second resonant circuit input node. - three resonant circuit input nodes (11, 12, 13) and three resonant circuit output nodes (21, 22, 23); - a transformer device comprising three primary windings (LP1, LP2, LP3) and three secondary windings (LS1, LS2, LS3) magnetically connected to each other, where the three secondary windings (LS1, LS2, LS3) are connected to the three resonant circuit output nodes (21, 22, 23); - first, second and third resonant tank devices (RT1, RT2, RT3) each connected between the respective three resonant circuit input nodes (11, 12, 13) and the respective primary windings (LP1, LP2, LP3); - the resonant circuit is further comprising first, second and third transformer switching devices (ST1, ST2, ST3) for reconfiguring the three secondary windings (LS1, LS2, LS3) between a delta-configuration and a star-configuration; and - where the three primary windings (LP1, LP2, LP3) together with the three resonant tank devices (RT1, RT2, RT3) are configured in a delta-configuration; where each resonant tank device (RT1, RT2, RT3) comprises a resonant inductor (LR1, LR2, LR3) and a resonant capacitor (CR1, CR2, CR3) and where - the first resonant inductor, the first resonant capacitor and the first primary winding are connected in series between the first resonant circuit input node and the third resonant circuit input node; - the second resonant inductor, the second resonant capacitor and the second primary winding are connected in series between the second resonant circuit input node and the first resonant circuit input node; and - the third resonant inductor, the third resonant capacitor and the third primary winding are connected in series between the third resonant circuit input node and the second resonant circuit input node.