DIRECT CURRENT UNINTERRUPTIBLE POWER SUPPLY SYSTEM
First Claim
1. A direct current (DC) uninterruptible power supply system provided with a first connection unit electrically connected to a DC power conversion system which converts prevailing alternating current (AC) power into DC power, an auxiliary power supply device charged with the DC power, and a second connection unit which is electrically connected to a load and supplies the DC power or power output from the auxiliary power supply device to the load, the DC uninterruptible power supply system comprising:
- a charging portion which boosts a level of DC voltage power supplied from the DC power conversion system normally connected to the first connection unit and charges the auxiliary power supply device with the boosted DC voltage power;
a discharge portion which generates internal voltage power by stepping down a level of voltage power of the auxiliary power supply device;
a comparator which compares the level of the DC voltage power supplied from the DC power conversion system with a level of a set reference voltage and outputs a clear voltage or a set voltage according to a result thereof; and
a switchover portion which comprises a relay connected to the first connection unit, the second connection unit, and the discharge portion, in which due to disconnection of the DC power conversion system from the first connection unit and a damage or short circuit of the DC power conversion system, the set voltage is supplied from the comparator, thereby allowing the relay to be set in such a way that connection between the first connection unit and the second connection unit is cut off and the discharge portion and the second connection unit are connected to allow the internal voltage power generated by the discharge portion to be supplied to the second connection unit, and as the DC power conversion system is normally connected to the first connection unit, the clear voltage is supplied from the comparator to allow the relay to become in a clear state in such a way that connection between the discharge portion and the second connection unit is cut off and the first connection unit and the second connection unit are connected to supply the DC power supplied from the DC power conversion system to the second connection unit.
2 Assignments
0 Petitions
Accused Products
Abstract
Disclosed is a direct current uninterruptible power supply system. The direct current uninterruptible power supply system according to an embodiment of the present invention is electrically connected to a direct current power converter for converting commercial alternating current power to direct current power, in order to: supply the direct current power to a load and charge an auxiliary power supply device therein with the direct current power. In the case of a short circuit of the direct current power converter due to a current leakage or breakage of the direct current power converter, or if the direct current power converter is disconnected, the direct current uninterruptible power supply system enables the auxiliary power supply device to constantly supply power to the load while completely blocking the electrical connection to the direct current power converter.
10 Citations
10 Claims
-
1. A direct current (DC) uninterruptible power supply system provided with a first connection unit electrically connected to a DC power conversion system which converts prevailing alternating current (AC) power into DC power, an auxiliary power supply device charged with the DC power, and a second connection unit which is electrically connected to a load and supplies the DC power or power output from the auxiliary power supply device to the load, the DC uninterruptible power supply system comprising:
-
a charging portion which boosts a level of DC voltage power supplied from the DC power conversion system normally connected to the first connection unit and charges the auxiliary power supply device with the boosted DC voltage power; a discharge portion which generates internal voltage power by stepping down a level of voltage power of the auxiliary power supply device; a comparator which compares the level of the DC voltage power supplied from the DC power conversion system with a level of a set reference voltage and outputs a clear voltage or a set voltage according to a result thereof; and a switchover portion which comprises a relay connected to the first connection unit, the second connection unit, and the discharge portion, in which due to disconnection of the DC power conversion system from the first connection unit and a damage or short circuit of the DC power conversion system, the set voltage is supplied from the comparator, thereby allowing the relay to be set in such a way that connection between the first connection unit and the second connection unit is cut off and the discharge portion and the second connection unit are connected to allow the internal voltage power generated by the discharge portion to be supplied to the second connection unit, and as the DC power conversion system is normally connected to the first connection unit, the clear voltage is supplied from the comparator to allow the relay to become in a clear state in such a way that connection between the discharge portion and the second connection unit is cut off and the first connection unit and the second connection unit are connected to supply the DC power supplied from the DC power conversion system to the second connection unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification