WO2017019092A1 - Non-direct load back-up systems - Google Patents

Non-direct load back-up systems Download PDF

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Publication number
WO2017019092A1
WO2017019092A1 PCT/US2015/042914 US2015042914W WO2017019092A1 WO 2017019092 A1 WO2017019092 A1 WO 2017019092A1 US 2015042914 W US2015042914 W US 2015042914W WO 2017019092 A1 WO2017019092 A1 WO 2017019092A1
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WO
WIPO (PCT)
Prior art keywords
power
coupled
switch
power source
load
Prior art date
Application number
PCT/US2015/042914
Other languages
French (fr)
Inventor
Hai Ngoc NGUYEN
Abhishek Banerjee
Darrel G. Gaston
Original Assignee
Hewlett Packard Enterprise Development Lp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Hewlett Packard Enterprise Development Lp filed Critical Hewlett Packard Enterprise Development Lp
Priority to PCT/US2015/042914 priority Critical patent/WO2017019092A1/en
Publication of WO2017019092A1 publication Critical patent/WO2017019092A1/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/30—Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads

Definitions

  • Computing systems can utilize devices such as an uninterruptible power system (UPS).
  • UPS uninterruptible power system
  • the UPS can help provide back-up power to components of the computing system when main power fails.
  • Some computing systems can include a number of power solutions to provide the back-up power to a number of loads coupled to the output of the power solution when main power fails.
  • Figure 1 illustrates a diagram of an example of a system for providing back-up power to non-direct loads consistent with the present disclosure.
  • Figure 2 illustrates a diagram of an example of a system for providing back-up power to non-direct loads consistent with the present disclosure.
  • Figure 3 illustrates a flow chart of an example of a method for providing back-up power to non-direct loads consistent with the present disclosure.
  • a number of methods and systems for providing back-up power to non- direct loads are described herein.
  • Electrical systems such as computing systems can utilize a power solution (e.g., distributed energy source (DES), power system, etc.) to provide back-up power to a number of devices when a main power source fails or is not providing power (e.g., main power source is non-functioning, main power source is in an off mode, etc.). That is, the power solution can be a DC power back-up system.
  • Some computing systems can utilize a number of direct loads and a number of non-direct loads.
  • the number of direct loads can be devices (e.g. computing devices, etc.) that are directly coupled to an output of the power solution.
  • the number of non-direct loads can be devices that are coupled to the main power source, but are not coupled to the output of the power solution. That is, the number of non-direct loads devices with electrical connections that do not pass through the power solution.
  • the power solution can include a first switch coupled to a back-up power source and a node that is coupled between an input and an output, where the input is coupled to a main power source and the output is coupled to a first load (e.g., direct load, etc.).
  • the power solution can include a second switch that is coupled between the input and the node.
  • a second load e.g., non-direct load, etc.
  • the back-up power source can provide power to the first load and the second load when the first and second switches are turned on.
  • the power solution can be utilized to provide power to direct loads and non-direct loads when the main power source fails or becomes non-functional.
  • a main power source fails previous systems and methods provided power to only direct loads that were coupled to the output of the power solution while the non-direct loads remained without power.
  • the systems and methods for providing back-up power to non-direct loads can utilize a number of switches and/or a reverse connection pathway to provide power to the non-direct loads and the direct loads simultaneously when the main power source fails.
  • FIG. 1 illustrates a diagram of an example of a system 100 for providing back-up power to non-direct loads consistent with the present disclosure.
  • the system 100 can include a main power source 102 that can provide power to a number of loads 126, 128.
  • the main power source 102 can provide power to a number of direct loads 126 via a power solution 106.
  • the main power source 102 can provide power to a number of non-direct loads 128 without utilizing the power solution 106.
  • the main power source 102 can be a high voltage direct current (HVDC) power source or other type of power source to provide power to the number of loads 126, 128.
  • the main power source 102 can be coupled to an input 104 of the power solution 106.
  • HVDC high voltage direct current
  • the input 104 can be coupled to a number of fuses 108 and a switch 1 10 that can provide reverse polarity protection for the power solution 106.
  • a power supply 1 12 can be coupled at a node between the switch 1 10 and the switch 1 18.
  • the power supply 1 12 can direct power from the main power source 102 to a controller 1 14 and/or other components within the power solution 106.
  • the controller 1 14 can be communicatively coupled to each of the switches 1 18, 120 to control power distribution within the power solution 106 by turning on (e.g., activating) and/or turning off (e.g., deactivating) the switches 1 18, 120.
  • the power solution 106 can include a switch 120 that is coupled to a backup power source 121 and a node that is located between the switch 1 18 and an output 124 of the power solution 106.
  • the node can be a coupling between the switch 1 18 and the output 124 of the power solution 106. That is, the node can be a location where a first connection line (e.g., wire) is coupled to a second connection line (e.g., wire).
  • an inductor 122 can be located between the node and the output 124 of the power solution 106.
  • the inductor 122 can be an electrical component that can resist changes in electric current that passes through the inductor 122.
  • the output 124 of the power solution 106 can be coupled to a load 126.
  • the load 126 is a direct load that utilizes power from the main power source 102 that passes through the power solution 106.
  • the system 100 can represent when the main power source 102 is functional and providing power to the load 128 without passing through the power solution 106 as well as providing power to the load 126 through the power solution 106.
  • the switch 1 18 can be turned on to allow power from the main power source 102 to pass through each of the switches 1 10, 1 18 when a diode of switch 1 10 is forward biased.
  • the switch 120 can be turned off to prevent power from the main power source from passing through to the back-up power supply 121.
  • the load 126 and the load 128 can be powered in parallel by the main power source 102 or the back-up power source 121 as described herein.
  • the power solution 106 can include a reverse conduction path 130 between the input 104 and at least the switch 1 18.
  • the reverse conduction path 130 can be between the input and the node where the switch 120 is coupled between the switch 1 18 and the output 124.
  • the reverse conducting path 130 can allow power to flow in multiple directions.
  • the reverse conducting path 130 can allow power to flow from the main power source 130, through the input 104, and to the switch 1 18.
  • the reverse conducting path 130 can allow power to flow from the back-up power source 121 , through the switches 120, 1 18, 1 10, and to the input 104.
  • the reverse conducting path 130 can be utilized to provide power from the back-up power source to the load 128 (e.g., non-direct load).
  • Figure 2 illustrates a diagram of an example of a system 200 for providing back-up power to non-direct loads consistent with the present disclosure.
  • the system 200 can include the same or similar features as system 100 as referenced in Figure 1.
  • the system 200 can include a main power source 202 that is coupled to a number of loads 226, 228. As shown in Figure 2, the load 226 and the load 228 can be powered in parallel by the main power source 202 or the back-up power source 221 as described herein. In some examples, the main power source 202 can be coupled to an input 204 of a power solution 206 to provide power to load 226 via the power solution 206. In addition, the main power source 202 can be coupled to a load 228 without utilizing the power solution 206. As described herein, the load 226 can be a direct load and load 228 can be a non-direct load.
  • the system 200 can include a fuse 208 that is coupled to the input 204.
  • the system 200 can include a switch 210 that is coupled to the fuse 208.
  • the switch 210 can provide reverse polarity protection for the power solution 206.
  • the system 200 can include power supply 212 that is coupled to a node between the switch 210 and a switch 218.
  • the power supply 212 can distribute power from the main power source 202 to a controller 214 and/or a back-up power source 221.
  • the controller 214 can be communicatively coupled to each of the switches 218, 220 to control power distribution within the power solution 206.
  • the controller 214 can turn on or turn off each of the number of switches 218, 220 to provide power to the loads 226, 228 under a number of conditions (e.g., main power source 202 failure, main power source 202 active, etc.).
  • the system 200 can include a switch 220 that is coupled between a backup power source 221 a node.
  • the node can be a coupling between the switch 218 and an output 224 of the power solution 206.
  • an inductor 222 can be coupled between the node and the output 224.
  • a load 226 can be coupled to the output 224 of the power solution 206.
  • the load 226 can be a direct load that receives power from the main power source via the power solution 206.
  • the system 200 can represent when there is a main power source 202 failure (e.g., main power source 202 is in an off state, main power source 202 is nonfunctional, etc.).
  • the controller 214 can turn on switch 220 upon determining a failure of the main power source 202.
  • the switch 220 can allow power to flow from the back-up power source 221 to the load 226 via the inductor 222 and output 224 of the power solution 206.
  • the controller 214 can turn on switch 218 upon determining a failure of the main power source 202.
  • the power solution 206 can include a reverse conducting path 230 that can allow power from the main power source 202 to flow from switch 210 to switch 218 when the main power source 202 is active and/or functional.
  • the reverse conducting path 230 can allow power from the back-up power source 220 to flow through switch 218 and switch 210 to the input 204.
  • the reverse conducting path 230 can allow the back-up power source 221 to provide power to the load 228 via the reverse conducting path 230 and input 204 when the switches 220, 218 are turned on.
  • the diode of switch 210 can be reversed bias. In previous systems and methods, the switch 210 would have been turned off when the power source 202 was off or non-functional.
  • switch 210 can be turned on such that in spite of the diode being reversed biased with respect to power flow from the back-up power source 221 , load 228 can receive power from the back-up power source 221 that passes through switch 220, switch 218, and switch 210 to an external connection via the input 204.
  • the power source 202 includes a reverse biased diode that can prevent power back-feed from the back-up power source 221.
  • the system 200 can provide back-up power to loads and/or devices that are not coupled to the output 224 of the power solution 206.
  • the system 200 can be advantageous over previous systems and methods that include power solutions with a limited number of outputs and/or systems and methods that utilize non-direct loads such as load 228.
  • FIG 3 illustrates a flow chart of an example of a method 340 for providing back-up power to non-direct loads consistent with the present disclosure.
  • the method 340 can be implemented by a controller.
  • the method 340 can be executed by controller 1 14 as referenced in Figure 1 and/or controller 214 as referenced in Figure 2.
  • the controller as used herein, can include a combination of hardware and programming, but at least hardware, that is configured to perform the functions of the method 340. In some examples, the controller can utilize logic to perform the functions of the method 340.
  • the method 340 can include turning on a first switch coupled to a back-up power source and a node that is coupled between a second switch and an output of a power solution, wherein turning on the first switch provides power from the back-up power source to a direct load coupled to the output of the power solution.
  • Turning on the first switch can include allowing power to pass through the first switch.
  • the first switch can be turned on upon a determination that a main power supply has failed or become non-functional.
  • the first switch can include a forward biased diode that is on and connected to a back-up power source via an anode of the first switch.
  • the first switch can be turned on to reduce an on-state impedance of the back-up power flow path.
  • the method 340 can include turning on the second switch coupled between an input of the power solution and the node, wherein turning on the second switch provides power from the back-up power source through a reverse conducting path between the second switch and the input to provide power to a non-direct load coupled to the input of the power solution.
  • the method 340 can include determining that a main power source coupled to the input of the power solution has failed prior to turning on the first switch coupled to the back-up power supply.
  • the method 340 can include turning off the first switch upon determining that the main power source is functional, where the reverse conducting path is utilized to provide power from the main power source to the output of the power solution.
  • the reverse conducting path can be utilized to provide power through the power solution when the main power source is active and also be utilized to provide power from the back-up power source to an input of the power solution. Utilizing the reverse conducting path to provide power to the input of the power solution can allow the back-up power source to provide power to non-direct loads that are not connected to an output of the power solution.
  • logic is an alternative or additional processing resource to perform a particular action and/or function, etc., described herein, which includes hardware, e.g., various forms of transistor logic, application specific integrated circuits (ASICs), etc., as opposed to computer executable instructions, e.g., software firmware, etc., stored in memory and executable by a processor.
  • ASICs application specific integrated circuits
  • a number of something can refer to one or more such things.
  • a number of widgets can refer to one or more widgets.

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  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
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Abstract

In one implementation, a system for providing back-up power to non-direct loads includes a first switch coupled to a back-up power source and a node that is coupled between an input and an output, wherein the input is coupled to a main power source and the output is coupled to a first load, a second switch coupled between the input and the node, a second load coupled to the input, wherein the back-up power source provides power to the first load and the second load when the first switch and second switch are turned on.

Description

NON-DIRECT LOAD BACK-UP SYSTEMS
Background
[0001] Computing systems can utilize devices such as an uninterruptible power system (UPS). The UPS can help provide back-up power to components of the computing system when main power fails. Some computing systems can include a number of power solutions to provide the back-up power to a number of loads coupled to the output of the power solution when main power fails.
Brief Description of the Drawings
[0002] Figure 1 illustrates a diagram of an example of a system for providing back-up power to non-direct loads consistent with the present disclosure.
[0003] Figure 2 illustrates a diagram of an example of a system for providing back-up power to non-direct loads consistent with the present disclosure.
[0004] Figure 3 illustrates a flow chart of an example of a method for providing back-up power to non-direct loads consistent with the present disclosure.
Detailed Description
[0005] A number of methods and systems for providing back-up power to non- direct loads are described herein. Electrical systems such as computing systems can utilize a power solution (e.g., distributed energy source (DES), power system, etc.) to provide back-up power to a number of devices when a main power source fails or is not providing power (e.g., main power source is non-functioning, main power source is in an off mode, etc.). That is, the power solution can be a DC power back-up system. Some computing systems can utilize a number of direct loads and a number of non-direct loads. The number of direct loads can be devices (e.g. computing devices, etc.) that are directly coupled to an output of the power solution. The number of non-direct loads can be devices that are coupled to the main power source, but are not coupled to the output of the power solution. That is, the number of non-direct loads devices with electrical connections that do not pass through the power solution.
[0006] In some examples, the power solution can include a first switch coupled to a back-up power source and a node that is coupled between an input and an output, where the input is coupled to a main power source and the output is coupled to a first load (e.g., direct load, etc.). In addition, the power solution can include a second switch that is coupled between the input and the node. A second load (e.g., non-direct load, etc.) can be coupled to the input. In some examples, the back-up power source can provide power to the first load and the second load when the first and second switches are turned on.
[0007] The power solution can be utilized to provide power to direct loads and non-direct loads when the main power source fails or becomes non-functional. When a main power source fails, previous systems and methods provided power to only direct loads that were coupled to the output of the power solution while the non-direct loads remained without power. The systems and methods for providing back-up power to non-direct loads can utilize a number of switches and/or a reverse connection pathway to provide power to the non-direct loads and the direct loads simultaneously when the main power source fails.
[0008] Figure 1 illustrates a diagram of an example of a system 100 for providing back-up power to non-direct loads consistent with the present disclosure. The system 100 can include a main power source 102 that can provide power to a number of loads 126, 128. In some examples, the main power source 102 can provide power to a number of direct loads 126 via a power solution 106. In addition, the main power source 102 can provide power to a number of non-direct loads 128 without utilizing the power solution 106. [0009] The main power source 102 can be a high voltage direct current (HVDC) power source or other type of power source to provide power to the number of loads 126, 128. The main power source 102 can be coupled to an input 104 of the power solution 106. The input 104 can be coupled to a number of fuses 108 and a switch 1 10 that can provide reverse polarity protection for the power solution 106. In some examples, a power supply 1 12 can be coupled at a node between the switch 1 10 and the switch 1 18. The power supply 1 12 can direct power from the main power source 102 to a controller 1 14 and/or other components within the power solution 106. In some examples, the controller 1 14 can be communicatively coupled to each of the switches 1 18, 120 to control power distribution within the power solution 106 by turning on (e.g., activating) and/or turning off (e.g., deactivating) the switches 1 18, 120.
[0010] The power solution 106 can include a switch 120 that is coupled to a backup power source 121 and a node that is located between the switch 1 18 and an output 124 of the power solution 106. In some examples, the node can be a coupling between the switch 1 18 and the output 124 of the power solution 106. That is, the node can be a location where a first connection line (e.g., wire) is coupled to a second connection line (e.g., wire). In some examples, an inductor 122 can be located between the node and the output 124 of the power solution 106. The inductor 122 can be an electrical component that can resist changes in electric current that passes through the inductor 122. The output 124 of the power solution 106 can be coupled to a load 126. In some examples, the load 126 is a direct load that utilizes power from the main power source 102 that passes through the power solution 106.
[0011] The system 100 can represent when the main power source 102 is functional and providing power to the load 128 without passing through the power solution 106 as well as providing power to the load 126 through the power solution 106. In this example, the switch 1 18 can be turned on to allow power from the main power source 102 to pass through each of the switches 1 10, 1 18 when a diode of switch 1 10 is forward biased. In addition, the switch 120 can be turned off to prevent power from the main power source from passing through to the back-up power supply 121. As shown in Figure 1 , the load 126 and the load 128 can be powered in parallel by the main power source 102 or the back-up power source 121 as described herein. [0012] The power solution 106 can include a reverse conduction path 130 between the input 104 and at least the switch 1 18. In some examples, the reverse conduction path 130 can be between the input and the node where the switch 120 is coupled between the switch 1 18 and the output 124. The reverse conducting path 130 can allow power to flow in multiple directions. For example, the reverse conducting path 130 can allow power to flow from the main power source 130, through the input 104, and to the switch 1 18. In addition, the reverse conducting path 130 can allow power to flow from the back-up power source 121 , through the switches 120, 1 18, 1 10, and to the input 104. Thus, the reverse conducting path 130 can be utilized to provide power from the back-up power source to the load 128 (e.g., non-direct load).
[0013] Figure 2 illustrates a diagram of an example of a system 200 for providing back-up power to non-direct loads consistent with the present disclosure. The system 200 can include the same or similar features as system 100 as referenced in Figure 1.
[0014] The system 200 can include a main power source 202 that is coupled to a number of loads 226, 228. As shown in Figure 2, the load 226 and the load 228 can be powered in parallel by the main power source 202 or the back-up power source 221 as described herein. In some examples, the main power source 202 can be coupled to an input 204 of a power solution 206 to provide power to load 226 via the power solution 206. In addition, the main power source 202 can be coupled to a load 228 without utilizing the power solution 206. As described herein, the load 226 can be a direct load and load 228 can be a non-direct load.
[0015] The system 200 can include a fuse 208 that is coupled to the input 204. In addition, the system 200 can include a switch 210 that is coupled to the fuse 208. The switch 210 can provide reverse polarity protection for the power solution 206. The system 200 can include power supply 212 that is coupled to a node between the switch 210 and a switch 218. As described herein, the power supply 212 can distribute power from the main power source 202 to a controller 214 and/or a back-up power source 221. In some examples, the controller 214 can be communicatively coupled to each of the switches 218, 220 to control power distribution within the power solution 206. For example, the controller 214 can turn on or turn off each of the number of switches 218, 220 to provide power to the loads 226, 228 under a number of conditions (e.g., main power source 202 failure, main power source 202 active, etc.).
[0016] The system 200 can include a switch 220 that is coupled between a backup power source 221 a node. In some examples, the node can be a coupling between the switch 218 and an output 224 of the power solution 206. In some examples, an inductor 222 can be coupled between the node and the output 224. A load 226 can be coupled to the output 224 of the power solution 206. The load 226 can be a direct load that receives power from the main power source via the power solution 206.
[0017] The system 200 can represent when there is a main power source 202 failure (e.g., main power source 202 is in an off state, main power source 202 is nonfunctional, etc.). The controller 214 can turn on switch 220 upon determining a failure of the main power source 202. When the switch 220 can allow power to flow from the back-up power source 221 to the load 226 via the inductor 222 and output 224 of the power solution 206.
[0018] In addition, the controller 214 can turn on switch 218 upon determining a failure of the main power source 202. The power solution 206 can include a reverse conducting path 230 that can allow power from the main power source 202 to flow from switch 210 to switch 218 when the main power source 202 is active and/or functional. In addition, the reverse conducting path 230 can allow power from the back-up power source 220 to flow through switch 218 and switch 210 to the input 204. Thus, the reverse conducting path 230 can allow the back-up power source 221 to provide power to the load 228 via the reverse conducting path 230 and input 204 when the switches 220, 218 are turned on. When the power source 202 is off or non-functional, the diode of switch 210 can be reversed bias. In previous systems and methods, the switch 210 would have been turned off when the power source 202 was off or non-functional.
However, to incorporate indirect load protection through back-up power, switch 210 can be turned on such that in spite of the diode being reversed biased with respect to power flow from the back-up power source 221 , load 228 can receive power from the back-up power source 221 that passes through switch 220, switch 218, and switch 210 to an external connection via the input 204. In some examples, the power source 202 includes a reverse biased diode that can prevent power back-feed from the back-up power source 221.
[0019] The system 200 can provide back-up power to loads and/or devices that are not coupled to the output 224 of the power solution 206. The system 200 can be advantageous over previous systems and methods that include power solutions with a limited number of outputs and/or systems and methods that utilize non-direct loads such as load 228.
[0020] Figure 3 illustrates a flow chart of an example of a method 340 for providing back-up power to non-direct loads consistent with the present disclosure. The method 340 can be implemented by a controller. For example, the method 340 can be executed by controller 1 14 as referenced in Figure 1 and/or controller 214 as referenced in Figure 2. The controller, as used herein, can include a combination of hardware and programming, but at least hardware, that is configured to perform the functions of the method 340. In some examples, the controller can utilize logic to perform the functions of the method 340.
[0021] At 342, the method 340 can include turning on a first switch coupled to a back-up power source and a node that is coupled between a second switch and an output of a power solution, wherein turning on the first switch provides power from the back-up power source to a direct load coupled to the output of the power solution.
Turning on the first switch can include allowing power to pass through the first switch. In some examples, the first switch can be turned on upon a determination that a main power supply has failed or become non-functional. In some examples, the first switch can include a forward biased diode that is on and connected to a back-up power source via an anode of the first switch. In some examples, the first switch can be turned on to reduce an on-state impedance of the back-up power flow path.
[0022] At 344, the method 340 can include turning on the second switch coupled between an input of the power solution and the node, wherein turning on the second switch provides power from the back-up power source through a reverse conducting path between the second switch and the input to provide power to a non-direct load coupled to the input of the power solution. In some examples, the method 340 can include determining that a main power source coupled to the input of the power solution has failed prior to turning on the first switch coupled to the back-up power supply.
[0023] In certain examples, the method 340 can include turning off the first switch upon determining that the main power source is functional, where the reverse conducting path is utilized to provide power from the main power source to the output of the power solution. As described herein, the reverse conducting path can be utilized to provide power through the power solution when the main power source is active and also be utilized to provide power from the back-up power source to an input of the power solution. Utilizing the reverse conducting path to provide power to the input of the power solution can allow the back-up power source to provide power to non-direct loads that are not connected to an output of the power solution.
[0024] As used herein, "logic" is an alternative or additional processing resource to perform a particular action and/or function, etc., described herein, which includes hardware, e.g., various forms of transistor logic, application specific integrated circuits (ASICs), etc., as opposed to computer executable instructions, e.g., software firmware, etc., stored in memory and executable by a processor. Further, as used herein, "a" or "a number of something can refer to one or more such things. For example, "a number of widgets" can refer to one or more widgets.
[0025] The above specification, examples and data provide a description of the method and applications, and use of the system and method of the present disclosure. Since many examples can be made without departing from the spirit and scope of the system and method of the present disclosure, this specification merely sets forth some of the many possible example configurations and implementations.

Claims

What is claimed is:
1. A system, comprising:
a first switch coupled to a back-up power source and a node that is coupled between an input and an output, wherein the input is coupled to a main power source and the output is coupled to a first load;
a second switch coupled between the input and the node; and a second load coupled to the input, wherein the back-up power source provides power to the first load and the second load when the first switch and second switch are turned on.
2. The system of claim 1 , wherein a coupling between the first switch and the input comprises a reverse conducting path coupling.
3. The system of claim 1 , wherein the first switch and the second switch are turned on when the main power source fails.
4. The system of claim 1 , wherein the second load is not coupled to an output of a power system comprising the back-up power source, the first switch, and the second switch.
5. The system of claim 1 , wherein an inductor is coupled between the node and the output.
6. The system of claim 1 , wherein the first load and the second load are powered in parallel.
7. The system of claim 1 , wherein the first load is a direct load and the second load is a non-direct load.
8. A power system, comprising: an input coupled to a main power source and a number of non-direct loads;
a first switch coupled to a back-up power source and node; a second switch coupled between the input and the node, wherein the node is coupled to an output that is coupled to a number of direct loads; and
a reverse conducting path between the first switch and the input.
9. The system of claim 8, wherein the back-up power source provides power to the number of non-direct loads via the reverse conducting path and the number of direct loads via the output.
10. The system of claim 8, wherein the node is a location where a first connection line is coupled to a second connection line.
1 1. The system of claim 8, wherein an inductor is coupled between the node and the output.
12. A method for providing back-up power to non-direct loads, comprising:
activating a first switch coupled to a back-up power source and a node that is coupled between a second switch and an output of a power solution, wherein activating the first switch provides power from the back-up power source to a direct load coupled to the output of the power solution; and
activating the second switch coupled between an input of the power solution and the node, wherein activating the second switch provides power from the back-up power source through a reverse conducting path between the second switch and the input to provide power to a non-direct load coupled to the input of the power solution.
13. The method of claim 12, comprising determining that a main power source coupled to the input of the power solution has failed prior to activating the first switch coupled to the back-up power supply.
14. The method of claim 13, comprising deactivating the first switch upon determining that the main power source is functional.
15. The method of claim 14, wherein the reverse conducting path is utilized to provide power from the main power source to the output of the power solution.
PCT/US2015/042914 2015-07-30 2015-07-30 Non-direct load back-up systems WO2017019092A1 (en)

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Publication number Priority date Publication date Assignee Title
US6597073B1 (en) * 1998-02-18 2003-07-22 Compaq Information Technologies Group, L.P. Circuit and method for providing power supply redundancy
US20100164290A1 (en) * 2008-12-31 2010-07-01 Powertech Industrial Co., Ltd. Uninterruptible power supply and method of energy saving thereof
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