NON-ISOLATED CHARGER WITH BI-POLAR INPUTS
First Claim
1. An uninterruptable power supply, comprising:
- a positive DC bus, a neutral DC bus, and a negative DC bus;
a battery charger circuit having an inductor, a first charger output and a second charger output;
a first switch connected to a first end of the inductor and configured to selectively couple the positive DC bus with the first charger output; and
a second switch connected to a second end of the inductor and configured to selectively couple the negative DC bus with the inductor and create a current path through the second switch and the inductor, the current path bypassing the first charger output and the second charger output;
wherein the neutral DC bus is coupled to the second charger output; and
wherein the battery charger circuit is configured to draw power from at least one of the positive DC bus and the negative DC bus to charge a battery coupled to the first charger output and the second charger output.
1 Assignment
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Accused Products
Abstract
Systems and methods are provided for an uninterruptable power supply having a positive DC bus, a neutral DC bus, and a negative DC bus. The uninterruptible power supply includes a battery charger circuit having an inductor, a first charger output, and a second charger output. A first switch connected to a first end of the inductor is configured to couple the positive DC bus with the first charger output. A second switch connected to a second end of the inductor is configured to couple the negative DC bus with the inductor. The neutral DC bus can be coupled to the second charger output. The battery charger circuit can be configured to draw power from at least one of the positive DC bus and the negative DC bus to charge a battery coupled to the first charger output and the second charger output.
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Citations
24 Claims
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1. An uninterruptable power supply, comprising:
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a positive DC bus, a neutral DC bus, and a negative DC bus; a battery charger circuit having an inductor, a first charger output and a second charger output; a first switch connected to a first end of the inductor and configured to selectively couple the positive DC bus with the first charger output; and a second switch connected to a second end of the inductor and configured to selectively couple the negative DC bus with the inductor and create a current path through the second switch and the inductor, the current path bypassing the first charger output and the second charger output; wherein the neutral DC bus is coupled to the second charger output; and wherein the battery charger circuit is configured to draw power from at least one of the positive DC bus and the negative DC bus to charge a battery coupled to the first charger output and the second charger output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for charging a battery of an uninterruptable power supply having a positive DC bus, a neutral DC bus, and a negative DC bus, comprising:
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selectively coupling; a first charger output of a battery charger circuit with the positive DC bus; and an inductor of the battery charger circuit with the negative DC bus to create a current path through the inductor, the current path bypassing the first charger output; coupling a second charger output of the battery charger circuit with the neutral DC bus; and applying current from at least one of the positive DC bus and the neutral DC bus through the inductor to the battery. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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24. An uninterruptable power supply, comprising:
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a positive DC bus, a neutral DC bus, and a negative DC bus; a battery charger circuit having an inductor, a first charger output, and a second charger output; means for selectively coupling; the first charger output with the positive DC bus; and the inductor with the negative DC bus to create a current path through the inductor, the current path bypassing the first charger output; the second charger output coupled to the neutral DC bus; and the battery charger circuit configured to pass current from at least one of the positive DC bus and the neutral DC bus through the inductor to charge a battery.
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Specification