Drive controller for a self-commutated converter
AssigneeSiemens Aktiengesellschaft
InventorsDieter Eckardt, Peter Janicke, Gunter Schwesig
Life of this patent
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Abstract
A drive controller for a self-commutated converter is described. The converter has two half-bridges, and the drive controller includes a corresponding control circuit for the converter valves of each half-bridge. Each control circuit can be connected via first switches to an external voltage. Each first switch is connected in parallel with a second switch, wherein the second switches are decoupled by way of decoupling diodes. The first and second switches can be alternatingly switched on and off. The switches can therefore be cyclically tested without interrupting service.
Claims12
A drive controller for a self-commutated converter having two half-bridges with converter valves, said drive controller comprising:
- two control circuits having each an input and an output, wherein the input of one control circuit is operatively connected to one of the half-bridges with its converter valves, and the input of the other control circuit is operatively connected to the other half-bridge with its converter valves;
- first switches connected between a voltage supply and the inputs of the control circuits for switchably connecting the inputs of the control circuits to an external voltage;
- second switches connected electrically in parallel with the first switches in one-to-one correspondence, said connected first and second switches being decoupled from each other by decoupling diodes and forming a set of decoupled switches;
- and
- control units providing control signals to the connected first and second switches so as to alternatingly switch the connected first and second switches on and off.
A drive controller for a self-commutated converter having two half-bridges with converter valves, said drive controller comprising:
- two control circuits having each an input and an output, wherein the input of one control circuit is operatively connected to one of the half-bridges with its converter valves, and the input of the other control circuit is operatively connected to the other half-bridge with its converter valves;
- a circuit assembly having an output supplying a DC voltage to the inputs of the control circuits;
- two switches connected between an external voltage and an input of the circuit assembly;
- and
- control units providing control signals to the switches so as to control the switches in a pulsed operating mode.
Dependencies are inferred from the claim text.