METHOD FOR CONTROLLING A POWER CONVERTER

摘要

It is especially provided a method for controlling a power converter, wherein the power converter comprises a first and a second full bridge 105, 107, 705, 707, a first and a second resonant circuit and a transformer 109, 710, wherein the first resonant circuit is supplied by the first full bridge 105, 705 with a first AC voltage, wherein the second resonant circuit is supplied by the second full bridge 107, 707 with a second AC voltage, wherein a first resonant current runs in the first resonant circuit, wherein a second resonant current runs in the second resonant circuit, wherein the transformer 109, 710 comprises a first primary side 119, 719, a second primary side 119, 719, a first secondary side 120, 720, and a second secondary side 120, 720, wherein the first primary side 119, 719 is connected to the first resonant circuit and the second primary side 119, 719 is connected to the second resonant circuit, the method comprising the steps of supplying the first and the second full bridge 105, 107, 705, 707 by a DC-voltage, controlling the first and the second full bridge 105, 107, 705, 707 by a control factor such as the first full bridge is switched at or adjacent to a zero crossing of the first resonant current and such as the second full bridge is switched at or adjacent to a zero crossing of the second resonant current, wherein a first AC-current results at the first secondary side of the transformer 109, 710 and a second AC-current results at the second secondary side of the transformer 109, 710, wherein a resulting AC-current is obtained by coupling the different AC-currents. The result thereof is the possibility to control the ripple of the resulting output AC-current.