Power-factor correction (PFC) topology of uninterrupted power supply
A technology of power factor correction and topology, which is applied in the electronic field, can solve problems such as the large influence of input characteristics, and achieve the effect of improving PFC performance and
Active Publication Date: 2012-06-13
HUAWEI DIGITAL POWER TECH CO LTD
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Problems solved by technology
Because the charger circuit of the battery takes power from the mains input, it has a great influence on its input characteristics
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[0011] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0012] It should be noted that in the following description, when two elements are "connected", the two elements may be directly connected or indirectly connected through one or more intermediate elements / mediums. The manner in which two elements are connected may include a contact manner or a non-contact manner, or may include a wired manner or a wireless manner. Those skilled in the art may make equivalent substitutions or modifications to the exempl...
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The embodiment of the invention relates to a power-factor correction (PFC) topology of an uninterrupted power supply. The topology comprises a commercial power input module, a battery group, a rectifier circuit, a PFC circuit and a charger circuit, wherein the output end of the commercial power input module and the output end of the battery group are connected with the input end of the rectifier circuit; the output end of the rectifier circuit is connected with the input end of the PFC circuit, the output end of the PFC circuit is connected with the input end of the charger circuit, and is used for supplying power to the charger circuit; and the output end of the charger circuit is connected with the input end of the battery group, and is used for charging the battery group. The charger circuit provided by the embodiment of the invention carries out charging on the battery group by taking electricity from the output end of the PFC circuit, and is capable of avoiding influence of commercial power input on an input characteristic of the charger circuit, thereby improving a PFC performance and a battery group charging performance.
Description
technical field [0001] Embodiments of the present invention relate to the field of electronics, and more particularly, to power factor correction topologies for uninterruptible power supplies. Background technique [0002] Online UPS (Uninterruptible Power Supply, uninterruptible power supply) has been widely used in various power supply occasions. For medium and high-power UPSs, due to the large discharge power, more battery cells are required, and the proportion of batteries to the overall cost of the UPS is relatively low. However, for low-power UPSs, the proportion of batteries to the overall cost of the UPS is relatively high. A single-cell topology is used. [0003] At present, the input of the PFC (Power Factor Correction, power factor correction) topology of UPS has two modes: mains input and battery pack. After double boost (Boost) circuit conversion, dual DC bus output is realized. The charger circuit of the battery is powered from the mains The positive half cyc...
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Login to View More IPC IPC(8): H02M1/42H02J7/02H02J7/10
CPCY02B70/126Y02B70/10
Inventor 刘培国费珍福郭欢
Owner HUAWEI DIGITAL POWER TECH CO LTD