Low-power UPS
A low-power, transformer technology, applied in electrical components, emergency power arrangements, circuit devices, etc., can solve problems such as inability to work, large isolation transformers, and reduced UPS reliability, and achieve high reliability and small size.
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[0014] The invention will be described in detail below in conjunction with specific embodiments.
[0015] like figure 2 As shown, the low-power UPS of this embodiment includes an input filter unit 1, an input relay REL1, a transformer T1, a charging unit 2, a battery BAT, a DC / DC conversion unit 3, an inverter unit 4 and an output relay REL3, and the transformer T1 is an automatic The coupling transformer, the DC / DC conversion unit 3 is a boost circuit, the output relay REL3 constitutes the output unit, the IN terminal is the mains input terminal, and the OUT terminal is the output terminal of the low-power UPS in this embodiment.
[0016] When the mains is normal, the input relay REL1 pulls in, and the output relay REL3 connects the output terminal of the transformer T1 to the output terminal OUT of the low-power UPS of this embodiment, thereby switching the working mode of the low-power UPS of this embodiment to the mains mode . After the input filter unit 1 filters the m...
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