ADJUSTABLE BATTERY CHARGER FOR UPS
First Claim
1. A method of optimizing battery charger power in a UPS, the method comprising:
- generating a charger current;
supplying the charger current to a battery array coupled to the UPS;
monitoring an input current to the UPS; and
if an amplitude of the input current exceeds a first predetermined limit, reducing the charger current.
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Accused Products
Abstract
An uninterruptible power supply (UPS) having an adjustable battery charger that generates a charger current, and a controller, coupled to the adjustable battery charger, that receives a signal representative of a system constraint and provides a reference, based on the signal, to the adjustable battery charger to control an amplitude of the charger current supplied by the adjustable battery charger based on the system constraint. The system constraint may include, for example, a maximum input current to the UPS, maximum charging current of the battery cell, and maximum and/or minimum charger current values.
115 Citations
18 Claims
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1. A method of optimizing battery charger power in a UPS, the method comprising:
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generating a charger current; supplying the charger current to a battery array coupled to the UPS; monitoring an input current to the UPS; and if an amplitude of the input current exceeds a first predetermined limit, reducing the charger current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An uninterruptible power supply comprising:
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an input module configured to receive input power; at least one battery; an output module configured to provide output power derived from at least one of the input power and battery power; an adjustable battery charger, coupled to the at least one battery, that generates a charger current; and a controller, coupled to the adjustable battery charger, that receives a signal representative of a system constraint and provides a reference, based on the signal, to the charger to control amplitude of the charger current based on the system constraint. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. An uninterruptible power supply comprising:
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an input module configured to receive input power; a battery array including at least one battery; an output module configured to provide output power derived from at least one of the input power and battery power; a battery charger configured to generate a charger current to charger the battery array; and a controller coupled to the battery array and to the battery charger, the controller being configured to receive a signal representative of a system constraint and to provide a reference, based on the signal, to the battery charger to control an amplitude of the charger current based on the system constraint.
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18. The uninterruptible power supply as claimed in claim 18, wherein the system constraint includes a maximum input current to the uninterruptible power supply and a maximum charger current, and wherein the controller is configured to monitor an input current to the uninterruptible power supply and the charger current, and to dynamically adjust the charger current to maintain the charger current substantially at the maximum charger current without allowing the input current to exceed the maximum input current.
Specification