Frequency converter with drivable switch preventing undesired current flow

A frequency converter, comprising:

• a number of bridge branches, wherein a respective bridge branch comprises:
• a first power semiconductor, wherein the first power semiconductor comprises a first terminal, a second terminal and a control terminal, wherein the first power semiconductor is electrically connected to a first electrical conductor at the first terminal of the first power semiconductor, where a positive link circuit potential is present at the first electrical conductor during operation of the frequency converter,
• a second power semiconductor, wherein the second power semiconductor comprises a first terminal, a second terminal and a control terminal, wherein the second terminal of the first power semiconductor is electrically connected to the first terminal of the second power semiconductor at a center tap of the respective bridge branch,
• a shunt resistor for current measurement, wherein the shunt resistor is looped in between the second terminal of the second power semiconductor and a second electrical conductor, where a negative link circuit potential is present at the second electrical conductor during operation of the frequency converter,
• a first driver component comprising:
• a first voltage supply terminal and a second voltage supply terminal,
• an input terminal, and
• an output terminal, which is electrically connected to the control terminal of the first power semiconductor,
• wherein a bootstrap capacitor is looped in between the first voltage supply terminal and the second voltage supply terminal of the first driver component, and
• a second driver component, comprising:
• a first voltage supply terminal and a second voltage supply terminal,
• an input terminal, and
• an output terminal, which is electrically connected to the control terminal of the second power semiconductor,
• wherein
• the frequency converter further comprises:
• a drivable switch, which is interconnected such that in an open state a current is prevented from flowing via the bootstrap capacitor and the shunt resistor to the second electrical conductor.