Systems and methods for providing direct current and alternating current from a power supply to a load
An Uninterruptible Power Supply (UPS) including an input configured to receive input AC power, a DC output configured to provide output DC power to a load, an AC output configured to provide output AC power to the load, a charger coupled to the input and configured to convert the input AC power into DC power, a DC bus, and a controller configured to monitor a current demand at the DC output relative to a demand threshold, operate, in response to a determination that the current demand at the DC output is below the demand threshold, the UPS in a first mode of operation by enabling the charger to provide DC power to the DC bus, and operate, in response to a determination that the current demand at the DC output is above the demand threshold, the UPS in a second mode of operation by disabling the charger.
1. An Uninterruptible Power Supply (UPS), the UPS comprising:
an input configured to receive input AC power;
a DC output configured to provide output DC power to a load;
an AC output configured to provide output AC power to the load;
a charger coupled to the input and configured to convert the input AC power into DC power;
a DC bus coupled to the charger and configured to receive the DC power;
a bypass line coupled between the input and the AC output and configured to provide the input AC power to the AC output as the AC output power; and
a controller coupled to the charger and configured to:
monitor a current demand at the DC output relative to a demand threshold;
operate, in response to a determination that the current demand at the DC output is below the demand threshold, the UPS in a first mode of operation by enabling the charger to provide DC power to the DC bus; and
operate, in response to a determination that the current demand at the DC output is above the demand threshold, the UPS in a second mode of operation by disabling the charger.
2. The UPS of claim 1 , further comprising:
an auxiliary power interface coupled to the DC bus, the auxiliary power interface configured to provide DC power from the DC bus to an auxiliary power source and to receive DC power from the auxiliary power source.
3. The UPS of claim 2 , wherein during the first mode of operation, the auxiliary power source is configured to receive the DC power provided by the charger for charging the auxiliary power source.
4. The UPS of claim 2 , further comprising:
a DC-DC converter coupled to the DC bus and configured to convert the DC power from the DC bus into the output DC power.
5. The UPS of claim 4 , wherein during the second mode of operation, the controller is further configured to operate the DC-DC converter to convert the DC power provided by the auxiliary power source into the output DC power.
6. The UPS of claim 1 , wherein the demand threshold is a predetermined threshold.
7. The UPS of claim 1 , wherein the UPS is configured to operate in the first mode of operation to support the load while the load is drawing AC power from the AC output.
8. The UPS of claim 1 , wherein the UPS is configured to operate in the second mode of operation to support the load while the load is drawing DC power from the DC output.
9. An Uninterruptible Power Supply (UPS), the UPS comprising:
an input configured to receive input AC power;
a DC output configured to provide output DC power to a load;
an AC output configured to provide output AC power to the load;
a charger coupled to the input and configured to convert the input AC power into DC power;
a DC bus coupled to the charger and configured to receive the DC power;
a bypass line coupled between the input and the AC output and configured to provide the input AC power to the AC output as the AC output power; and
a controller coupled to the charger and configured to:
monitor a current demand at the AC output relative to a demand threshold;
operate, in response to a determination that the current demand at the AC output is above the demand threshold, the UPS in a first mode of operation by enabling the charger to provide DC power to the DC bus; and
operate, in response to a determination that the current demand at the AC output is below the demand threshold, the UPS in a second mode of operation by disabling the charger.
10. The UPS of claim 9 , further comprising:
an auxiliary power interface coupled to the DC bus, the auxiliary power interface configured to provide DC power from the DC bus to an auxiliary power source and to receive DC power from the auxiliary power source.
11. The UPS of claim 10 , wherein during the first mode of operation, the auxiliary power source is configured to receive the DC power provided by the charger for charging the auxiliary power source.
12. The UPS of claim 10 , further comprising:
a DC-DC converter coupled to the DC bus and configured to convert the DC power from the DC bus into the output DC power.
13. The UPS of claim 12 , wherein during the second mode of operation, the controller is further configured to operate the DC-DC converter to convert the DC power provided by the auxiliary power source into the output DC power.
14. The UPS of claim 10 , wherein the demand threshold is a predetermined threshold.
15. The UPS of claim 10 , wherein the UPS is configured to operate in the first mode of operation to support the load while the load is drawing AC power from the AC output.
16. The UPS of claim 10 , wherein the UPS is configured to operate in the second mode of operation to support the load while the load is drawing DC power from the DC output.
17. A non-transitory computer-readable medium storing thereon sequences of computer-executable instructions for operating an Uninterruptible Power Supply (UPS), the sequences of computer-executable instructions including instructions that instruct at least one processor to control the UPS to:
receive input AC power at an input from an input power source;
provide, via a DC output, output DC power to a load;
provide, via an AC output, output AC power to the load;
monitor a current demand at the DC output relative to a demand threshold;
operate, in response to a determination that the current demand at the DC output is below the demand threshold, the UPS in a first mode of operation by enabling a charger coupled to the input to convert the input AC power into DC power; and
operate, in response to a determination that the current demand at the DC output is above the demand threshold, the UPS in a second mode of operation by disabling the charger.
18. The non-transitory computer readable medium according to claim 17 , wherein the sequences of instructions include instructions that instruct the at least one processor to control the UPS to:
provide, in the first mode of operation, the DC power from the charger to a DC bus to charge an auxiliary power source coupled to the DC bus; and
provide, in the second mode of operation, DC power from the auxiliary power source to a DC-DC converter coupled to the DC bus, the DC-DC converter being configured to convert the DC power from the auxiliary power source into the output DC power.
19. The non-transitory computer readable medium according to claim 17 , wherein the UPS is operated in the first mode of operation to support the load while the load is drawing AC power from the AC output.
20. The non-transitory computer readable medium according to claim 17 , wherein the UPS is operated in the second mode of operation to support the load while the load is drawing DC power from the DC output.