CONVERTER

• US 20110002149A1
• Filed: 02/03/2009
• Published: 01/06/2011
• Est. Priority Date: 02/06/2008
• Status: Active Grant

• Current Assignee: Innomotics GmbH
• Original Assignee: Siemens AG
• Inventors: Sommer, Rainer, Hiller, Marc
• Granted Patent: US 8,385,086 B2
• Time in Patent Office: Days
• US Class Current: 363/126
• CPC Class Codes: H02M 5/458 using semiconductor devices only
• CPC Class Codes: H02M 5/4585 having a rectifier with controlled elements
• CPC Class Codes: H02M 7/483 Converters with outputs that each can have more than two voltages levels
• CPC Class Codes: H02M 7/4835 comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage

Abstract

A converter has a network-side and a load-side power converter that are connected together on the DC side in an electrically conductive manner. An upper and a lower valve branch of each phase module, respectively, of the load-side power converter has at least one two-poled subsystem. At least one multiphase network-controlled power converter is provided as the network-side power converter. In this way, a converter is obtained, in particular an intermediate voltage circuit converter for intermediate voltages, which combines a simple and cost-effective feed circuit on the network side with a modular multilevel converter on the load side.

Claims

1-9. -9. (canceled)

10. A converter, comprising:

a mains-side power converter having a DC voltage side; and

a load-side polyphase power converter having a DC voltage side electrically conductively connected to said DC voltage side of said mains-side power converter;

each phase module of said load-side polyphase power converter having a respective upper and lower valve branch with at least one two-pole subsystem; and

said mains-side power converter having at least one polyphase mains-commutated power converter.

11. The converter according to claim 10, wherein said mains-commutated power converter is a diode rectifier.

12. The converter according to claim 10, wherein said mains-commutated power converter is a thyristor rectifier.

13. The converter according to claim 10, wherein said mains-commutated power converter is a half-controlled thyristor bridge.

14. The converter according to claim 10, wherein said mains-commutated power converter is a thyristor reversible power converter.

15. The converter according to claim 13, wherein a diode rectifier and a thyristor rectifier are provided as half-controlled bridges and are connected electrically in series on the DC voltage side.

16. The converter according to claim 10, which comprises a further load-side polyphase power converter connected on a DC voltage side electrically in parallel with said mains-side and a first said load-side polyphase power converter.

17. The converter according to claim 10, wherein said at least one polyphase mains-commutated power converter is one of at least two polyphase mains-commutated power converters electrically connected in series, wherein said at least two polyphase mains-commutated power converters in said mains-side power converter are each linked on an AC voltage side to connections of a low-voltage-side transformer winding of a mains transformer.

18. The converter according to claim 17, wherein said low-voltage-side transformer windings are configured to have a predetermined phase shift angle with respect to one another.