CPC H02M 7/5387 (2013.01) [H02M 1/0043 (2021.05); H02M 1/123 (2021.05); H02M 1/126 (2013.01)] | 20 Claims |
1. Converter assembly for converting a DC voltage into an N-phase AC voltage or vice versa, comprising
a connected inverter unit having a number M of electronically controllable half bridges for least one, preferably for each of the N phases, wherein M is greater than one,
a control unit controlling the half bridges which is designed to activate the half bridges in a phase-offset manner with a substantially constant switching frequency fT, wherein,
to damp electrical common-mode interference, the phases are connected to a respective winding of a common-mode choke with a common magnetic core, and wherein
the outputs of the half bridges which supply the same phase are in each case interconnected via interleaving chokes,
wherein a first LC filter stage and a second LC filter stage are provided, wherein the first LC filter stage is formed by the interleaving chokes and a resistance-damped capacitor circuit, and the second LC filter stage is formed by the common-mode choke and a resistance-damped capacitor circuit.
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