DC voltage switch
Various embodiments may include a voltage switch having two terminals linked by an operating current path comprising a mechanical switch, and having means of generating a counter voltage to the voltage in the operating path. In some embodiments, there are: two terminals linked by an operating current path comprising a mechanical switch; a transformer having a primary side connected in series with the mechanical switch in the operating current path; a voltage source connected to a secondary side of the transformer; and a switch connected in series with the voltage source.
1. A DC voltage switch comprising:
two terminals linked by an operating current path comprising a mechanical switch; a transformer having a primary side connected in series with the mechanical switch in the operating current path;
a voltage source connected to a secondary side of the transformer;
a switch connected in series with the voltage source; and
a switch for short-circuiting a secondary winding of the transformer.
2. The DC voltage switch as claimed in claim 1 , wherein the voltage source comprises a capacitor.
3. The DC voltage switch as claimed in claim 2 , further comprising the capacitor connected to a device for charging the capacitor.
4. The DC voltage switch as claimed in claim 1 , wherein the mechanical switch has a switching time of less than 5 ms.
5. The DC voltage switch as claimed in claim 1 , wherein the voltage source comprises a DC-link capacitor of a converter.
6. The DC voltage switch as claimed in claim 1 , wherein the voltage source can be connected to a secondary winding of the transformer in both polarities.
7. The DC voltage switch as claimed in claim 6 , further comprising a bridge circuit connected between the secondary side of the transformer and the voltage source.
8. A DC voltage switch comprising:
two terminals linked by an operating current path comprising a mechanical switch; a transformer having a primary side connected in series with the mechanical switch in the operating current path;
a voltage source connected to a secondary side of the transformer; and
a switch connected in series with the voltage source;
wherein the voltage source comprises a DC-link capacitor of a converter.
9. The DC voltage switch as claimed in claim 8 , wherein the voltage source comprises a capacitor.
10. The DC voltage switch as claimed in claim 9 , further comprising the capacitor connected to a device for charging the capacitor.
11. The DC voltage switch as claimed in claim 8 , wherein the mechanical switch has a switching time of less than 5 ms.
12. The DC voltage switch as claimed in claim 8 , wherein the voltage source can be connected to a secondary winding of the transformer in both polarities.
13. The DC voltage switch as claimed in claim 12 , further comprising a bridge circuit connected between the secondary side of the transformer and the voltage source.
14. A DC voltage switch comprising:
two terminals linked by an operating current path comprising a mechanical switch; a transformer having a primary side connected in series with the mechanical switch in the operating current path;
a voltage source connected to a secondary side of the transformer;
a switch connected in series with the voltage source; and
a bridge circuit connected between the secondary side of the transformer and the voltage source;
wherein the voltage source can be connected to a secondary winding of the transformer in both polarities.
15. The DC voltage switch as claimed in claim 14 , wherein the voltage source comprises a capacitor.
16. The DC voltage switch as claimed in claim 15 , further comprising the capacitor connected to a device for charging the capacitor.
17. The DC voltage switch as claimed in claim 14 , wherein the mechanical switch has a switching time of less than 5 ms.
18. The DC voltage switch as claimed in claim 14 , further comprising a switch for short-circuiting a secondary winding of the transformer.
19. The DC voltage switch as claimed in claim 14 , wherein the voltage source comprises a DC-link capacitor of a converter.