Method and apparatus for providing uninterruptible power
First Claim
1. An uninterruptible power supply for providing power to a load, the uninterruptible power supply comprising:
- an input to receive input power;
an output to provide output power;
a back-up power source coupled to the output to provide backup power at the output;
a contactor coupled to the input and having an open state and a closed state;
a contactor control circuit having an output coupled to the contactor to provide an output voltage to control an operational state of the contactor, the contactor control circuit being configured to provide an output voltage having a first voltage level to the contactor to control the contactor to switch from the open state to the closed state and to provide a second output voltage having a second voltage level to maintain the contactor in the closed state.
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Accused Products
Abstract
Methods and apparatus for providing uninterruptible power are provided by aspects of the invention. One aspect is more particularly directed to an uninterruptible power supply for providing power to a load. The uninterruptible power supply includes an input to receive input power, an output to provide output power, a back-up power source coupled to the output to provide backup power at the output, a contactor coupled to the input and having an open state and a closed state, a contactor control circuit having an output coupled to the contactor to provide an output voltage to control an operational state of the contactor, the contactor control circuit being configured to provide an output voltage having a first voltage level to the contactor to control the contactor to switch from the open state to the closed state and to provide a second output voltage having a second voltage level to maintain the contactor in the closed state.
216 Citations
36 Claims
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1. An uninterruptible power supply for providing power to a load, the uninterruptible power supply comprising:
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an input to receive input power;
an output to provide output power;
a back-up power source coupled to the output to provide backup power at the output;
a contactor coupled to the input and having an open state and a closed state;
a contactor control circuit having an output coupled to the contactor to provide an output voltage to control an operational state of the contactor, the contactor control circuit being configured to provide an output voltage having a first voltage level to the contactor to control the contactor to switch from the open state to the closed state and to provide a second output voltage having a second voltage level to maintain the contactor in the closed state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for controlling a contactor contained in an uninterruptible power supply having an output that provides output power from one of a primary power source and a back-up power source, the method comprising:
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detecting presence of AC power from the primary power source;
applying a voltage having a first value to the contactor to change a state of the contactor to closed from open; and
applying a voltage having a second value to the contactor after the contactor has changed from open to closed to maintain the contactor in the closed state. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An uninterruptible power supply for providing power to a load, the uninterruptible power supply comprising:
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an input to receive input power;
an output to provide output power;
a back-up power source coupled to the output to provide backup power at the output;
a contactor coupled to the input and having an open state and a closed state;
means for providing an output voltage having a first voltage level to the contactor to control the contactor to switch from the open state to the closed state and for providing a second output voltage having a second voltage level to maintain the contactor in the closed state. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification