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US 11,967,890 B2Granted
Frequency converter
AssigneeLenze SE
InventorsRobin Stahel, Andreas Burgermeister
Life of this patent
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Abstract
A frequency converter includes: at least one bridge arm, wherein a shunt resistor is arranged in the bridge arm; an evaluation device having an input connection, the evaluation device being designed to evaluate a measurement signal which is present at the input connection and which is dependent on a voltage drop across the shunt resistor, in order to determine a measured 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.
Claims4
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.
5 more elements
Dependencies are inferred from the claim text.