Uninterruptible power supply system with precharge converter
First Claim
1. An uninterruptible power supply system comprisingan AC power source connection for providing AC input power by an AC power source to the uninterruptible power supply system,a DC link, which comprises a first and a second DC bus line, which are both coupled to a common reference point, where the common reference point is connectable to the AC power source neutral,a DC power supply connection connectable to a DC energy storage,a primary DC-DC converter for transferring power between the DC energy storage and the DC linkwhereina precharge converter with power connectors on its input side, which power connectors are connected to the DC power supply connection, and with a first and a second output connector connected to the first and the second DC bus line,the precharge converter further comprises a converter circuit for receiving DC power from the power connectors and providing DC power to the first and second output connector, anda control unit for controlling operation of the converter circuit,wherein one power connector of the power connectors is connected to the common reference point, andthe converter circuit is controlled by the control unit to provide power to the output connectors at the same time with reference to the common reference point.
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Accused Products
Abstract
An uninterruptable power supply system is disclosed with a precharge converter for connecting to a DC link of the uninterruptable power supply system to a DC power supply, whereby the DC link comprises a first and a second DC bus line, which are both coupled to a common reference point, whereby the common reference point can be an AC power supply neutral of the uninterruptable power supply system, comprising power connectors for connecting to the DC power supply, a first and second output connector for connecting to the first and the second DC bus line, respectively, a converter circuit for receiving DC power from the power connectors and providing DC power to the first and second output connector, and a control unit for controlling operation of the converter circuit.
10 Citations
22 Claims
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1. An uninterruptible power supply system comprising
an AC power source connection for providing AC input power by an AC power source to the uninterruptible power supply system, a DC link, which comprises a first and a second DC bus line, which are both coupled to a common reference point, where the common reference point is connectable to the AC power source neutral, a DC power supply connection connectable to a DC energy storage, a primary DC-DC converter for transferring power between the DC energy storage and the DC link wherein a precharge converter with power connectors on its input side, which power connectors are connected to the DC power supply connection, and with a first and a second output connector connected to the first and the second DC bus line, the precharge converter further comprises a converter circuit for receiving DC power from the power connectors and providing DC power to the first and second output connector, and a control unit for controlling operation of the converter circuit, wherein one power connector of the power connectors is connected to the common reference point, and the converter circuit is controlled by the control unit to provide power to the output connectors at the same time with reference to the common reference point.
Specification