AC and DC uninterruptible online power supplies
First Claim
Patent Images
1. A power supply comprising:
- a rectifier that converts an alternating current input voltage to a first direct current voltage;
an inverter that converts the first direct current voltage to an alternating current output voltage;
a first set of output terminals that receives the alternating current output voltage;
a second set of output terminals that receives the first direct current voltage; and
a control module that monitors at least one of voltage, current and power of each of (i) the first set of output terminals and (ii) the second set of output terminals,wherein the rectifier receives a second direct current voltage from a backup power source based on the power supply operating in a predetermined condition, andwherein the control module, based on the at least one of voltage, current and power of each of (i) the first set of output terminals and (ii) the second set of output terminals, signalsthe rectifier to reduce a first maximum current output of the rectifier while maintaining supply of current out of the rectifier, andthe inverter to reduce a second maximum current output of the inverter while maintaining supply of current out of the inverter.
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Abstract
A power supply includes a rectifier that converts an alternating current input voltage to a first direct current voltage. An inverter that converts the first direct current voltage to an alternating current output voltage. A first set of output terminals that receives the alternating current output voltage. A second set of output terminals that receives the first direct current voltage. A charging circuit that charges a backup power source based on the first direct current voltage. The rectifier receives a second direct current voltage from the backup power source based on the power supply operating in a predetermined condition.
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Citations
48 Claims
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1. A power supply comprising:
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a rectifier that converts an alternating current input voltage to a first direct current voltage; an inverter that converts the first direct current voltage to an alternating current output voltage; a first set of output terminals that receives the alternating current output voltage; a second set of output terminals that receives the first direct current voltage; and a control module that monitors at least one of voltage, current and power of each of (i) the first set of output terminals and (ii) the second set of output terminals, wherein the rectifier receives a second direct current voltage from a backup power source based on the power supply operating in a predetermined condition, and wherein the control module, based on the at least one of voltage, current and power of each of (i) the first set of output terminals and (ii) the second set of output terminals, signals the rectifier to reduce a first maximum current output of the rectifier while maintaining supply of current out of the rectifier, and the inverter to reduce a second maximum current output of the inverter while maintaining supply of current out of the inverter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A power supply comprising:
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a rectifier that converts an alternating current input voltage to a first direct current voltage; an inverter that converts the first direct current voltage to an alternating current output voltage; a first set of output terminals that receives the alternating current output voltage; a second set of output terminals that receives the first direct current voltage; wherein the rectifier receives a second direct current voltage from a backup power source based on the power supply operating in a predetermined condition, and wherein the rectifier converts the alternating current input voltage to the first direct current voltage while converting the second direct current voltage to the first direct current voltage; and a control module that determines a first current at the first set of output terminals, determines a second current at the second set of output terminals, calculates a sum of the first current and the second current, and limits current to at least one of the first set of output terminals and the second set of output terminals when the sum is greater than a predetermined limit while maintaining current to the at least one the first set of output terminals or the second set of output terminals. - View Dependent Claims (28, 29)
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30. A method of operating a power supply comprising:
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converting an alternating current input voltage to a first direct current voltage via a rectifier; converting the first direct current voltage to an alternating current output voltage via an inverter; receiving the alternating current output voltage by a first set of output terminals; receiving the first direct current voltage by a second set of output terminals; supplying a second direct current voltage from a backup power source to the rectifier based on the power supply operating in a predetermined condition; monitoring at least one of voltage, current and power of the first set of output terminals and the second set of output terminals; based on the at least one of voltage, current and power of the first set of output terminals and the second set of output terminals, at least one of (i) signaling the rectifier to reduce a first maximum current output of the rectifier while maintaining supply of current out of the rectifier and (ii) signaling the inverter to reduce a second maximum current output of the inverter while maintaining supply of current out of the inverter; limiting current to the first set of output terminals and the second set of output terminals when a sum of a first current supplied to the first set of output terminals and a second current supplied to the second set of output terminals is greater than a first predetermined limit; and not limiting current to the first set of output terminals and the second set of output terminals when the sum is less than or equal to the first predetermined limit. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. A power supply comprising:
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a rectifier that converts an alternating current input voltage to a first direct current voltage; an inverter that converts the first direct current voltage to an alternating current output voltage; a first set of output terminals that receives the alternating current output voltage; a second set of output terminals that receives the first direct current voltage; and a control module that monitors current of the first set of output terminals and current of the second set of output terminals, wherein the rectifier receives a second direct current voltage from a backup power source based on the power supply operating in a predetermined condition, and wherein the control module, based on the current of the first set of output terminals and the current of the second set of output terminals, at least one of (i) permits the current of the first set of output terminals to increase when the current of the second set of output terminals is less than a first predetermined limit and prevents the current of the first set of output terminals from increasing when the current of the second set of output terminals is greater than or equal to the first predetermined limit, and (ii) permits the current of the second set of output terminals to increase when the current of the first set of output terminals is less than a second predetermined limit and prevents the current of the second set of output terminals from increasing when current of the first set of output terminals is greater than or equal to the second predetermined limit. - View Dependent Claims (46, 47, 48)
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Specification