UPS systems having multiple operation modes and methods of operating same
First Claim
1. A power supply system comprising:
- an AC input configured to be coupled to an AC source;
an AC output configured to be coupled to a load;
a UPS having an input coupled to the AC input and an output coupled to the AC output;
a bypass circuit coupled between the AC input and the AC output and configured to open and close a bypass path therebetween; and
a controller configured to control the UPS and the bypass circuit such that the UPS operates as an online UPS for a first input voltage magnitude condition at the AC input and as a standby UPS for a second input voltage magnitude condition at the AC input.
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Accused Products
Abstract
A power supply system includes an AC input configured to be coupled to an AC source, an AC output configured to be coupled to a load, a UPS having an input coupled to the AC input and an output coupled to the AC output and a bypass circuit coupled between the AC input and the AC output and configured to open and close a bypass path therebetween. The system further includes a controller configured to control the UPS and the bypass circuit such that the UPS operates as an online UPS for a first input voltage magnitude condition at the AC input and as a standby UPS for a second input voltage magnitude condition at the AC input. A multi-mode converter may be coupled to a DC link of the UPS and configured to be selectively coupled to a battery and the AC input to respectively support battery conversion and current control at the AC input in respective first and second modes of operation of the UPS.
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Citations
29 Claims
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1. A power supply system comprising:
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an AC input configured to be coupled to an AC source;
an AC output configured to be coupled to a load;
a UPS having an input coupled to the AC input and an output coupled to the AC output;
a bypass circuit coupled between the AC input and the AC output and configured to open and close a bypass path therebetween; and
a controller configured to control the UPS and the bypass circuit such that the UPS operates as an online UPS for a first input voltage magnitude condition at the AC input and as a standby UPS for a second input voltage magnitude condition at the AC input. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A UPS comprising:
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an AC input;
an AC output;
a diode bridge rectifier having an input coupled to the AC input;
an inverter having an output coupled to the AC output;
a DC link coupling an output of the rectifier to an input of the inverter;
a multi-mode converter coupled to the DC link and configured to be selectively coupled to a battery and the AC input to respectively support battery conversion and current control at the AC input in respective first and second modes of operation of the UPS. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of operating a power supply system including an AC input configured to be coupled to an AC source, an AC output configured to be coupled to a load, a UPS having an input coupled to the AC input and an output coupled to the AC output, and a bypass circuit coupled between the AC input and the AC output and configured to open and close a bypass path therebetween, the method comprising:
controlling the UPS and the bypass circuit such that the UPS operates as an online UPS for a first input voltage magnitude condition at the AC input and as a standby UPS for a second input voltage magnitude condition at the AC input. - View Dependent Claims (19, 20, 21, 22)
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23. A method of operating a UPS including an AC input, an AC output, a diode bridge rectifier having an input coupled to the AC input, an inverter having an output coupled to the AC output, a DC link coupled to an output of the rectifier and a battery coupled to the DC link, the method comprising:
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providing a converter coupled to the DC link;
coupling the converter to a battery and operating the converter to provide battery conversion in a first mode of operation of the UPS; and
coupling the converter to the AC input and operating the converter to control current at the AC input in a second mode of operation of the UPS. - View Dependent Claims (24, 25, 26, 27, 28, 29)
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Specification