IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0111679
(2005-04-21)
|
등록번호 |
US-7402921
(2008-07-22)
|
발명자
/ 주소 |
- Ingemi,Michael
- Landsman,Emanuel
|
출원인 / 주소 |
- American Power Conversion Corporation
|
대리인 / 주소 |
Lowrie, Lando & Anastasi, LLP
|
인용정보 |
피인용 횟수 :
22 인용 특허 :
14 |
초록
▼
At least one aspect is directed to an uninterruptible power supply that includes a first input to receive a first input voltage from a first voltage source, a second input to receive a second input voltage from a second voltage source, and a boost circuit coupled to the first input and the second in
At least one aspect is directed to an uninterruptible power supply that includes a first input to receive a first input voltage from a first voltage source, a second input to receive a second input voltage from a second voltage source, and a boost circuit coupled to the first input and the second input. The boost circuit is configured to provide a positive output DC voltage and a negative output DC voltage derived from at least one of the first input voltage and the second input voltage. The uninterruptible power supply is configured such that in a back-up mode of operation, the negative output DC voltage is derived from the second input voltage using a circuit that includes at least two controlled switches coupled in series.
대표청구항
▼
What is claimed is: 1. An uninterruptible power supply comprising: a first input to receive a first input voltage from a first voltage source; a second input to receive a second input voltage from a second voltage source; and a boost circuit coupled to the first input and the second input and confi
What is claimed is: 1. An uninterruptible power supply comprising: a first input to receive a first input voltage from a first voltage source; a second input to receive a second input voltage from a second voltage source; and a boost circuit coupled to the first input and the second input and configured to provide a positive output DC voltage and a negative output DC voltage derived from at least one of the first input voltage and the second input voltage, wherein the uninterruptible power supply is configured such that in a back-up mode of operation, both the positive output DC voltage and the negative output DC voltage are derived from the second voltage source and the negative output DC voltage is derived from the second input voltage using a circuit that includes at least two controlled switches coupled in series. 2. The uninterruptible power supply of claim 1, further comprising a control circuit coupled to the boost circuit, wherein the boost circuit includes a positive boost circuit and a negative boost circuit, wherein the control circuit is coupled to the positive boost circuit to control the positive boost circuit to generate the positive DC output voltage in a line mode of operation from at least the first input voltage, and wherein the control circuit is coupled to the negative boost circuit to control the negative boost circuit to generate the negative DC output voltage in the line mode of operation from at least the first input voltage. 3. The uninterruptible power supply of claim 2, wherein the at least two controlled switches includes a first controlled switch that forms a part of the negative boost circuit, and a second controlled switch coupled to the control circuit, the second input and to the negative boost circuit and configured such that in the back-up mode of operation, a current path is formed through the first controlled switch and the second controlled switch. 4. The uninterruptible power supply of claim 2, wherein each of the positive boost circuit and the negative boost circuit are controlled to provide power factor correction. 5. The uninterruptible power supply of claim 1, wherein the at least two controlled switches includes a first controlled switch and a second controlled switch, and wherein the uninterruptible power supply further comprises: a third input to couple to a ground connection of at least one of the first voltage source and the second voltage source; and a negative boost circuit that includes a first diode coupled between the third input and a first node of the first controlled switch, an inductor having a first node and a second node with the second node coupled to a second node of the first controlled switch, and a second diode coupled to the second node of the first controlled switch; wherein the second controlled switch has a first node coupled to the second input and a second node coupled to the first node of the first controlled switch. 6. The uninterruptible power supply of claim 5, further comprising: a first switching circuit coupled to a control circuit and operative to selectively couple an input of a positive boost circuit to one of the first input and the second input; and a second switching circuit coupled to the control circuit and operative to selectively couple the second node of the inductor to one of the first input and the third input. 7. The uninterruptible power supply of claim 1, further comprising an inverter coupled to the boost circuit and operative to generate an output AC voltage at first and second output nodes derived from the positive DC voltage and the negative DC voltage. 8. The uninterruptible power supply of claim 7, wherein the uninterruptible power supply is configured to provide an uninterrupted neutral connection from a third input to the second output node. 9. The uninterruptible power supply of claim 1, wherein each of the at least two controlled switches includes a transistor. 10. The uninterruptible power supply of claim 1, wherein the boost circuit is configured such that in the back-up mode of operation voltage across a first one of the at least two controlled switches is not greater than the second input voltage. 11. An uninterruptible power supply comprising: a first input to receive a first input voltage from a first voltage source; a second input to receive a second input voltage from a second voltage source; and a boost circuit coupled to the first input and the second input and configured to provide a positive output DC voltage and a negative output DC voltage derived from at least one of the first input voltage and the second input voltage, wherein the uninterruptible power supply is configured such that in a back-up mode of operation, the negative output DC voltage is derived from the second input voltage using a circuit that includes at least two controlled switches coupled in series; a control circuit coupled to the boost circuit, wherein the boost circuit includes a positive boost circuit and a negative boost circuit, wherein the control circuit is coupled to the positive boost circuit to control the positive boost circuit to generate the positive DC output voltage in a line mode of operation from at least the first input voltage, and wherein the control circuit is coupled to the negative boost circuit to control the negative boost circuit to generate the negative DC output voltage in the line mode of operation from at least the first input voltage, wherein the at least two controlled switches includes a first controlled switch that forms a part of the negative boost circuit, and a second controlled switch coupled to the control circuit, the second input and to the negative boost circuit and configured such that in the back-up mode of operation, a current path is formed through the first controlled switch and the second controlled switch; and a third input to couple to a ground connection of at least one of the first voltage source and the second voltage source; wherein the negative boost circuit includes: a first diode coupled between the third input and a first node of the first controlled switch; an inductor having a first node and a second node with the second node coupled to a second node of the first controlled switch; and a second diode coupled to the second node of the first controlled switch; and wherein the second controlled switch has a first node coupled to the second input and a second node coupled to the first node of the first controlled switch. 12. The uninterruptible power supply of claim 11, further comprising the second voltage source and wherein the second voltage source includes a battery coupled between the second input and the third input. 13. The uninterruptible power supply of claim 5, further comprising: a first switching circuit coupled to the control circuit and operative to selectively couple an input of the positive boost circuit to one of the first input and the second input; and a second switching circuit coupled to the control circuit and operative to selectively couple the Second node of the inductor to one of the first input and the third input. 14. The uninterruptible power supply of claim 13, further comprising an inverter coupled to outputs of the boost circuit, coupled to the third input and operative to generate an output AC voltage at first and second output nodes derived from the positive DC voltage and the negative DC voltage. 15. The uninterruptible power supply of claim 14, wherein the uninterruptible power supply is configured to provide an uninterrupted neutral connection from the third input to the second output node. 16. The uninterruptible power supply of claim 15, wherein each of the positive boost circuit and the negative boost circuit are controlled to provide power factor correction. 17. The uninterruptible power supply of claim 16, wherein each of the first controlled switch and the second controlled switch includes a transistor. 18. An uninterruptible power supply comprising: a first input to receive a first input voltage from a first voltage source; a second input to receive a second input voltage from a second voltage source; and a boost circuit coupled to the first input and the second input and configured to provide a positive output DC voltage and a negative output DC voltage derived from at least one of the first input voltage and the second input voltage, wherein the uninterruptible power supply is configured such that in a back-up mode of operation, the negative output DC voltage is derived from the second input voltage using a circuit that includes at least two controlled switches coupled in series wherein the at least two controlled switches includes a first controlled switch and a second controlled switch, and wherein the uninterruptible power supply further comprises; a third input to couple to a ground connection of at least one of the first voltage source and the second voltage source; and a negative boost circuit that includes a first diode coupled between the third input and a first node of the first controlled switch, an inductor having a first node and a second node with the second node coupled to a second node of the first controlled switch, and a second diode coupled to the second node of the first controlled switch; wherein the second controlled switch has a first node coupled to the second input and a second node coupled to the first node of the first controlled switch; and further comprising the second voltage source and wherein the second voltage source includes a battery coupled between the second input and the third input. 19. A method of generating an output voltage from at least one of a first input voltage source providing a primary voltage and a secondary input voltage source providing a back-up voltage, the method comprising: in a line mode of operation, generating a positive DC voltage and a negative DC voltage derived from at least the primary voltage; and in a back-up mode of operation, generating a positive DC voltage and a negative DC voltage derived from the back-up voltage; wherein in the back-up mode of operation, the negative DC voltage is generated using a plurality of controlled switches operatively coupled in series to create a current path from the secondary input voltage source through each of the plurality of controlled switches. 20. The method of claim 19 further comprising: controlling each of the plurality of controlled switches using pulse width modulation, such that while in back-up mode of operation each of the plurality of controlled switches is switched between an off state having an off time and an on state having an on time with a ratio between the on time and the off time controlled to provide a regulated output voltage. 21. The method of claim 20, wherein controlling includes controlling the plurality of controlled switches, such that in back-up mode of operation voltage across a first one of the controlled switches is not greater than the back-up voltage. 22. The method of claim 21, further comprising controlling draw of current from the first input voltage source to provide power factor correction. 23. The method of claim 22, further comprising converting the positive DC voltage and the negative DC voltage into an output AC voltage in both the line mode of operation and the back-up mode of operation. 24. The method of claim 23, further comprising rectifying the primary voltage to provide a positive rectified voltage and a negative rectified voltage. 25. The method of claim 24, wherein the plurality of controlled switches includes a first transistor and a second transistor. 26. The method of claim 19, wherein controlling includes controlling the plurality of controlled switches such that in the back-up mode of operation, voltage across a first one of the controlled switches is not greater than the back-up voltage. 27. The method of claim 19, further comprising controlling draw of current from the first input voltage source to provide power factor correction. 28. The method of claim 19, further comprising converting the positive DC voltage and the negative DC voltage into an output AC voltage in both the line mode of operation and the back-up mode of operation. 29. The method of claim 19, further comprising rectifying the primary voltage to provide a positive rectified voltage and a negative rectified voltage. 30. The method of claim 19, wherein the plurality of controlled switches includes a first transistor and a second transistor coupled in series. 31. An uninterruptible power supply comprising: a first input to receive a first input voltage from a first voltage source; a second input to receive a second input voltage from a second voltage source; and means for providing a positive output DC voltage and a negative output DC voltage derived from at least one of the first input voltage and the second input voltage, wherein the means for providing is configured such that in a back-up mode of operation, the positive output DC voltage and the negative DC output voltage are derived from the second voltage source, with the negative output DC voltage being derived from the second input voltage using a circuit that includes at least two controlled switches coupled in series. 32. The uninterruptible power supply of claim 31, wherein the at least two controlled switches includes a first transistor and a second transistor coupled in series, and wherein the means for providing includes means for maintaining a voltage across the first transistor to be less than or equal to the second input voltage. 33. The uninterruptible power supply of claim 32, further comprising the second voltage source and wherein the second voltage source includes a battery. 34. The uninterruptible power supply of claim 33, further comprising means for generating an AC output voltage at an output of the uninterruptible power supply. 35. The uninterruptible power supply of claim 34, further comprising an uninterrupted neutral connection from the first input to the output. 36. The uninterruptible power supply of claim 31, further comprising the second voltage source and wherein the second voltage source includes a battery. 37. The uninterruptible power supply of claim 31, further comprising means for generating an AC output voltage at an output of the uninterruptible power supply. 38. The uninterruptible power supply of claim 37, further comprising an uninterrupted neutral connection from the first input to the output.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.