| CPC H02M 3/01 (2021.05) [H02M 1/0058 (2021.05); H02M 3/33569 (2013.01)] | 14 Claims |
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1. A three-phase interleaved resonant converter, comprising:
a three-phase inversion circuit connected to an input voltage and comprising a first output node, a second output node, and a third output node;
a three-phase transformer comprising three transformers;
a three-phase resonant circuit comprising a first resonant inductor, a second resonant inductor, a third resonant inductor, a first resonant capacitor, a second resonant capacitor and a third resonant capacitor, wherein a first end of the first resonant inductor is directly connected to the first output node, a second end of the first resonant inductor is directly connected to a first end of the first resonant capacitor, a first end of the second resonant inductor is directly connected to the second output node, a second end of the second resonant inductor is directly connected to a first end of the second resonant capacitor, a first end of the third resonant inductor is directly connected to the third output node, a second end of the third resonant inductor is directly connected to a first end of the third resonant capacitor, a second end of the first resonant capacitor is connected to the first end of the second resonant capacitor and the three-phase transformer, a second end of the second resonant capacitor is connected to the first end of the third resonant capacitor and the three-phase transformer and a second end of the third resonant capacitor is connected to the first end of the first resonant capacitor and the three-phase transformer; and
a three-phase rectifier filter circuit connected with secondary windings of the three transformers to rectify and filter secondary currents output by the secondary windings of the three transformers respectively, and generate an output voltage accordingly,
wherein the three-phase inversion circuit comprises a first switching bridge arm, a second switching bridge arm, and a third switching bridge arm connected in parallel, a midpoint of the first switching bridge arm is the first output node, a midpoint of the second switching bridge arm is the second output node, a midpoint of the third switching bridge arm is the third output node;
wherein the first switching bridge arm only comprises two first switches connected in series, the second switching bridge arm only comprises two second switches connected in series, and the third switching bridge arm only comprises two third switches connected in series,
wherein a phase difference between driving pulses of the first switching bridge arm and driving pulses of the second switching bridge arm is 120 degrees, a phase difference between the driving pulses of the second switching bridge arm and driving pulses of the third switching bridge arm is 120 degrees, and a phase difference between the driving pulses of the third switching bridge arm and the driving pulses of the first switching bridge arm is 120 degrees,
wherein the two first switches of the first switching bridge arm connected in series are with a switching timing difference of 180 degrees, the two second switches of the second switching bridge arm connected in series are with a switching timing difference of 180 degrees, and the two third switches of the third switching bridge arm connected in series are with a switching timing difference of 180 degrees, and
wherein two ends of the two first switches, the two second switches, and the two third switches are connected with a parallel reverse diode respectively.
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