UNINTERRUPTIBLE POWER SUPPLY APPARATUS FOR RECEIVING POWER FROM DIFFERENT ELECTRICAL UTILITY CONFIGURATIONS

• US 20140028099A1
• Filed: 07/24/2012
• Published: 01/30/2014
• Est. Priority Date: 07/24/2012
• Status: Active Grant

• Current Assignee: ABB Schweiz AG (ABB Limited)
• Original Assignee: General Electric Company
• Inventors: van Kalken, Christian, Agrawal, Sanjay
• Granted Patent: US 9,373,978 B2
• Time in Patent Office: Days
• US Class Current: 307/64
• CPC Class Codes: H02J 9/061 for DC powered loads
• CPC Class Codes: H02M 1/10 Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from ac or dc

Abstract

An uninterruptible power supply (UPS) apparatus is disclosed that can receive power from different electrical utility configurations. The input stage of the UPS includes a three phase rectifier bridge design having three legs configured for connection to the different electrical utility configurations. An advantage that may be realized in the practice of some disclosed embodiments of the UPS input stage is that a single UPS can have the flexibility to be used with different electrical utility configurations having different voltages and phases.

Claims

1. An uninterruptible power supply (UPS) apparatus for receiving power from different electrical utility configurations, the apparatus comprising:

a three phase rectifier bridge comprising

a first leg comprising a first rectifier diode and a second rectifier diode with a first leg node located between and connecting the first and second rectifier diodes,

a second leg comprising a third rectifier diode and a fourth rectifier diode with a second leg node located between and connecting the third and fourth rectifier diodes, and

a third leg comprising a fifth rectifier diode and a sixth rectifier diode with a third leg node located between and connecting the fifth and sixth rectifier diodes,

wherein the first leg, the second leg, and the third leg are connected in parallel;

a switch connected in parallel with the three phase rectifier bridge;

a direct current output circuit connected in parallel with the three phase rectifier bridge and the switch, the direct current output circuit comprising a first output bus and a second output bus with an output bus ground node located between and connecting the first output bus and the second output bus;

a first UPS input connected to the second leg node of the three phase rectifier bridge with a first input filter inductor located between and connecting the first UPS input to the second leg node;

a second UPS input connected to the third leg node of the three phase rectifier bridge with a second input filter inductor located between and connecting the second UPS input to the third leg node; and

a third UPS input connected to the output bus ground node.

2. The uninterruptible power supply apparatus of claim 1, further comprising a fourth UPS input connected to the first leg node of the three phase rectifier bridge.

3. The uninterruptible power supply apparatus of claim 1, further comprising a power distribution unit (PDU) for providing an interface for connecting the different electrical utility configurations to the UPS, the power distribution unit comprising:

a first PDU output connected to the first UPS input;

a second PDU output connected to the second UPS input; and

a third PDU output connected to the third UPS input.

4. The uninterruptible power supply apparatus of claim 3, wherein the power distribution unit further comprises:

a first PDU input connected to the first PDU output; and

a second PDU input connected to the second PDU output.

5. The uninterruptible power supply apparatus of claim 4, wherein the power distribution unit further comprises:

a third PDU input connected to the third PDU output.

6. The uninterruptible power supply apparatus of claim 2, further comprising a power distribution unit (PDU) for providing an interface for connecting the different electrical utility configurations to the UPS, the a power distribution unit comprising:

a first PDU output connected to the first UPS input;

a second PDU output connected to the second UPS input;

a third PDU output connected to the third UPS input; and

a fourth PDU output connected to the fourth UPS input.

7. The uninterruptible power supply apparatus of claim 6, wherein the power distribution unit further comprises:

a first PDU input connected to the first PDU output and the second PDU output; and

a third PDU input connected to the third PDU output and the fourth PDU output.

8. The uninterruptible power supply apparatus of claim 1, wherein the switch comprises one or more insulated gate bipolar transistors.

9. The uninterruptible power supply apparatus of claim 1, wherein the switch comprises one or more metal-oxide-semiconductor field-effect transistors.

10. The uninterruptible power supply apparatus of claim 1, wherein the direct current output circuit further comprises:

a seventh rectifier diode located between and connecting the switch and the first output bus, with the anode of the seventh rectifier diode connected to the switch and the cathode of the seventh rectifier diode connected to the first output bus; and

an eighth rectifier diode located between and connecting the switch and the second output bus, with the cathode of the eighth rectifier diode connected to the switch and the anode of the eighth rectifier diode connected to the second output bus.

12. The uninterruptible power supply apparatus of claim 1, further comprising a fourth UPS input connected to the first leg node of the three phase rectifier bridge, and wherein the power distribution unit comprises a fourth PDU output connected to the fourth UPS input.

15. The uninterruptible power supply apparatus of claim 12, wherein the power distribution unit further comprises:

a first PDU input connected to the first PDU output and the second PDU output; and

a third PDU input connected to the third PDU output and the fourth PDU output.

18. The uninterruptible power supply apparatus of claim 1, wherein the direct current output circuit further comprises:

a seventh rectifier diode located between and connecting the switch and the first output bus, with the anode of the seventh rectifier diode connected to the switch and the cathode of the seventh rectifier diode connected to the first output bus; and

an eighth rectifier diode located between and connecting the switch and the second output bus, with the cathode of the eighth rectifier diode connected to the switch and the anode of the eighth rectifier diode connected to the second output bus.

11. An uninterruptible power supply (UPS) apparatus for receiving power from different electrical utility configurations, the apparatus comprising:

a three phase rectifier bridge comprising

a first leg comprising a first rectifier diode and a second rectifier diode with a first leg node located between and connecting the first and second rectifier diodes,

a second leg comprising a third rectifier diode and a fourth rectifier diode with a second leg node located between and connecting the third and fourth rectifier diodes, and

a third leg comprising a fifth rectifier diode and a sixth rectifier diode with a third leg node located between and connecting the fifth and sixth rectifier diodes,

wherein the first leg, the second leg, and the third leg are connected in parallel;

a switch connected in parallel with the three phase rectifier bridge;

a direct current output circuit connected in parallel with the three phase rectifier bridge and the switch, the direct current output circuit comprising a first output bus and a second output bus with an output bus ground node located between and connecting the first output bus and the second output bus;

a first UPS input connected to the second leg node of the three phase rectifier bridge with a first input filter inductor located between and connecting the first UPS input to the second leg node;

a second UPS input connected to the third leg node of the three phase rectifier bridge with a second input filter inductor located between and connecting the second UPS input to the third leg node;

a third UPS input connected to the output bus ground node; and

a power distribution unit (PDU) for providing an interface for connecting the different electrical utility configurations to the UPS, the power distribution unit comprising

a first PDU output connected to the first UPS input,

a second PDU output connected to the second UPS input, and

a third PDU output connected to the third UPS input.

13. The uninterruptible power supply apparatus of claim 11, wherein the power distribution unit further comprises:

a first PDU input connected to the first PDU output; and

a second PDU input connected to the second PDU output.

14. The uninterruptible power supply apparatus of claim 13, wherein the power distribution unit further comprises:

a third PDU input connected to the third PDU output.

16. The uninterruptible power supply apparatus of claim 11, wherein the switch comprises one or more insulated gate bipolar transistors.

17. The uninterruptible power supply apparatus of claim 11, wherein the switch comprises one or more metal-oxide-semiconductor field-effect transistors.