Patent ID: 11967890
Assignee: LENZE SE
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 0:
1. A frequency converter, comprising:
at least one bridge arm;
a shunt resistor arranged in the at least one bridge arm;
an evaluation device having an input connection, wherein the evaluation device is designed to evaluate a measurement signal, which is present at the input connection and is dependent on a voltage drop across the shunt resistor, in order to determine a measurement variable; and
a voltage peak suppression device which is designed to short-circuit the input connection of the evaluation device when a voltage peak occurs at the shunt resistor,
wherein the voltage peak suppression device comprises:
at least one switching device which is looped-in between the input connection of the evaluation device and is controlled via a control signal, wherein the switching device short-circuits the input connection of the evaluation device based on a state of the control signal, and
a high-pass filter which generates the control signal based on the voltage drop across the shunt resistor.