Uninterruptible power supply apparatus
AssigneeTmeic Corporation
InventorJun Matsumoto
Life of this patent
Estimating the term…
Abstract
An uninterruptible power supply apparatus includes an AC/DC converter that converts AC power supplied from a commercial AC power supply into DC power and supplies the DC power to a DC line, a DC/AC converter that converts the DC power received from the DC line into AC power and supplies the AC power to a load, a DC/DC converter that provides and receives DC power between the DC line and a battery, and a bidirectional converter that, in high-speed charging of the battery, operates in cooperation with the AC/DC converter, converts the AC power supplied from the commercial AC power supply into DC power, and supplies the DC power to the DC line. This can prevent a shortage of DC power during a high-speed charging operation and enables high-speed charging of the battery while supplying rated power to the load.
Claims5
An uninterruptible power supply apparatus comprising:
- a first power converter that
- in a normal state of an AC power supply, converts AC power supplied from the AC power supply into DC power and supplies the DC power to a DC line, and
- in a power failure of the AC power supply, stops an operation of the first power converter;
- a second power converter that converts the DC power received from the DC line into AC power and supplies the AC power to a load;
- a third power converter that
- in the normal state of the AC power supply, stores the DC power received from the DC line in a power storage device, and
- in the power failure of the AC power supply, supplies the DC power of the power storage device to the DC line;
- and
- a fourth power converter that, in a first case where high-speed charging of the power storage device is performed, operates in cooperation with the first power converter, converts the AC power supplied from the AC power supply into DC power, and supplies the DC power to the DC line,
- wherein
- in a second case where an overload operation is performed, the third power converter supplies the DC power of the power storage device to the DC line even in the normal state of the AC power supply, and
- in the second case, the fourth power converter operates in cooperation with the second power converter, converts the DC power received from the DC line into AC power, and supplies the AC power to the load, and
- wherein the fourth power converter includes
- a switching circuit that
- in the first case, connects an AC node to the AC power supply, and
- in the second case, connects the AC node to the load, and
- a fifth power converter that
- in the first case, converts the AC power supplied from the AC power supply through the AC node into DC power and supplies the DC power to the DC line, and
- in the second case, converts the DC power received from the DC line into AC power and supplies the AC power to the load through the AC node.
Dependencies are inferred from the claim text.