Siemens Aktiengesellschaft

René Junghänel

Klaus Nieberlein

Jens Schmenger

Matthias Nährig

Falko Baumann

Jennifer Lautner

A method for operating a power converter as an inverter between a DC voltage and an AC voltage grid is disclosed. For each AC voltage phase of the AC voltage grid, the power converter has at least one half-bridge which is connected to the AC voltage phase and has two semiconductor switches. Each semiconductor switch is reversed-connected in parallel with a diode. An activation angle range is determined for each semiconductor switch within an angle period, the lower range limit of which activation angle range is formed by subtracting a pre-firing angle from the lower range limit of a switch angle range, and the upper range limit of which activation angle range is formed by subtracting a pre-extinction angle from the upper range limit of the switch angle range.

Power converter and method for operating a power converter

A converter unit has a main printed circuit board (MPCB) on which at least one functional module is arranged. By the functional module, at least one AC voltage supplied to the functional module via first power connections of the functional module can be converted into at least two DC voltage potentials output via second power connections. The MPCB has conductor paths via which control signals can be supplied to control connections, and the MPCB has conductor paths which extend from a control unit to first and second control connections of the MPCB and via which the first and second control signals can be supplied to the first and second control connections. The functional module is at least mechanically connected to the MPCB at least in the region of the first and second control connections such that the functional module does not use the first and/or the second control signals.

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Marloffstein, Germany

René Junghänel