System for bypassing a power cell of a power supply
View Patent ↗A system. The system includes a multi-winding device having a primary winding and a plurality of three-phase secondary windings, and a plurality of power cells. Each power cell is connected to a different three-phase secondary winding of the multi-winding device. The system also includes a first contact connected to a first input terminal of at least one of the power cells, a second contact connected to a second input terminal of the at least one of the power cells, and a third contact connected to first and second output terminals of the at least one of the power cells.
1. A system, comprising:
a multi-winding device having a primary winding and a plurality of three-phase secondary windings;
a plurality of power cells, wherein each power cell is connected to a different three-phase secondary winding of the multi-winding device;
a stationary portion of a first contactor connected to a first input terminal of at least one of the power cells;
a stationary portion of a second contactor connected to a second input terminal of the at least one of the power cells; and
a stationary portion of a third contactor connected to first and second output terminals of the at least one of the power cells.
2. The system of claim 1 , further comprising:
a first coil coupled to a movable portion of the first contactor;
a second coil coupled to a movable portion of the second contactor; and
a third coil coupled to a movable portion of the third contactor.
3. The system of claim 2 , wherein at least one of the first, second and third coils is a latching coil.
4. The system of claim 2 , further comprising a control circuit connected to at least one of the first, second and third coils.
5. The system of claim 4 , wherein the control circuit is connected to the three-phase secondary winding to which the at least one of the power cells is connected.
6. The system of claim 4 , wherein the control circuit comprises a printed circuit board.
7. The system of claim 4 , wherein the control circuit comprises:
an impedance component connected to the three-phase secondary winding to which the at least one of the power cells is connected;
a rectifier connected to the impedance component;
a capacitor connected to the rectifier; and
a group of switching devices connected to the capacitor and at least one of the first, second and third coils.
8. The system of claim 7 , wherein the rectifier is a six-pulse rectifier.
9. The system of claim 7 , wherein the group of switching devices is an integrated circuit.
10. The system of claim 7 , further comprising a second regulator connected to the capacitor.
11. The system of claim 10 , wherein the second regulator is an integrated circuit.
12. The system of claim 7 , further comprising:
a shunt regulator connected to the rectifier; and
a diode connected between the shunt regulator and the capacitor.
13. The system of claim 7 , further comprising:
a step-down regulator connected to the capacitor; and
a second capacitor connected between the step-down regulator and the group of switching devices.
14. The system of claim 7 , further comprising:
a shunt regulator connected to the rectifier;
a diode connected between the shunt regulator and the capacitor;
a step-down regulator connected to the capacitor; and
a second capacitor connected between the step-down regulator and the group of switching devices.
15. The system of claim 4 , further comprising a switching device connected to the control circuit and at least one of the coils.
16. A system, comprising:
a multi-winding device having a primary winding and a plurality of three-phase secondary windings;
a plurality of power cells, wherein each power cell is connected to a different three-phase secondary winding of the multi-winding device;
a first contactor connected to a first input terminal of at least one of the power cells;
a second contactor connected to a second input terminal of the at least one of the power cells; and
a third contactor connected to first and second output terminals of the at least one of the power cells.
17. The system of claim 16 , wherein:
the first contactor comprises a first coil;
the second contactor comprises a second coil; and
the third contactor comprises a third coil.
18. The system of claim 16 , further comprising a control circuit connected to at least one of the first, second and third contactors.
19. The system of claim 18 , wherein the control circuit comprises a printed circuit board.
20. The system of claim 18 , wherein the control circuit comprises:
an impedance component connected to the three-phase secondary winding to which the at least one of the power cells is connected;
a rectifier connected to the impedance component;
a capacitor connected to the rectifier; and
a group of switching devices connected to the capacitor and at least one of the first, second and third coils.