Novel three-phase current converter topology based on modular multilevel converter
A modular multi-level, three-phase converter technology, applied in the direction of converting DC power input to DC power output, converting AC power input to DC power output, adjusting electrical variables, etc., can solve the problem of limiting the overall efficiency of the system, switching Loss and other issues, to achieve the effect of system volume and cost, reduce switching loss and conduction loss, and optimal design
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[0019] The present invention will be described in detail below in conjunction with the drawings and specific embodiments.
[0020] A new three-phase converter topology based on modular multilevel converters includes a high-voltage stage, an isolation stage, and a low-voltage stage. The high-voltage stage and the low-voltage stage are connected by an isolation stage. Bridge arm three-phase modular multilevel converter structure, two of the three phases are composed of upper bridge arm and lower bridge arm respectively. The upper bridge arm and lower bridge arm are composed of half-bridge sub-modules in series, and the third phase is composed of multiple Two capacitors are connected in series; the isolation stage adopts a high-frequency isolation mode, and is composed of a plurality of isolation sub-modules first in series and then in parallel.
[0021] The third-phase output terminal of the high-voltage stage is located at the midpoint of the capacitor series;
[0022] The sum of the...
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