Novel high-capacity multi-level hybrid clamping topology and topological method
A hybrid clamping and topological structure technology, applied to electrical components, output power conversion devices, AC power input conversion to DC power output, etc.
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[0030] A new type of high-capacity multi-level hybrid clamp topology, which is a three-phase four-leg structure, adding a bridge arm to the traditional hybrid three-phase structure, which is specially used for clamping, and this structure No additional voltage balance circuit and independent DC voltage source are required, and the midpoint potential balance can be achieved by itself no matter what the load characteristics are; and the traditional clamping device has been improved, and the diode of the three-phase four-leg topology The clamping device is changed to a capacitor clamping device. By adding an active switch tube as a clamping device, this topology realizes a bidirectional current path and improves the problem of unbalanced capacitor voltage. The two ends of the level inverter increase the output level from four levels to five levels. S al and S a8 Also and clamp IGBT S c2 ,S c3 ,S c4 ,S c5 ,S c6 , S c7 Together to realize the DC bus capacitance C 1 ,C 2 ,...
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