Frequency converter having an intermediate circuit without any capacitors
AssigneeSiemens Aktiengesellschaft
InventorsMANFRED BRUCKMANN, HUBERT SCHIERLING
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Abstract
A frequency converter includes an intermediate circuit without any capacitors and an electronics which is supplied with power from a power supply device. The power supply device has a buffer capacitor which is disposed on an input side of the power supply device and connected electrically in parallel with the intermediate circuit. Connected to the buffer capacitor is a supply line in which a decoupling diode is disposed. A semiconductor adapted to be switched off is connected electrically back-to-back in parallel with the decoupling diode and has a control output which is connected to an output of an identification device for recognizing a power-line failure.
Claims9
A frequency converter, comprising:
- an intermediate circuit without any capacitors;
- an electronics;
- a power supply device for supply of power to the electronics, said power supply device having a buffer capacitor disposed on an input side of the power supply device and connected electrically in parallel with the intermediate circuit;
- a supply line connected to the buffer capacitor;
- a decoupling diode disposed in the supply line;
- a semiconductor adapted to be switched off, said semiconductor connected electrically back-to-back in parallel with the decoupling diode and having a control output;
- and
- an identification device for recognizing a power-line failure, said identification device having an output connected to the control input of the semiconductor.
Dependencies are inferred from the claim text.