Alternating-current space isolation power supply

Abstract

The invention relates to a power supply, and particularly relates to an alternating-current (AC) space isolation power supply. The AC space isolation power supply comprises an AC charging power supply, a first rechargeable battery and a second rechargeable battery, wherein the input end of the AC charging power supply is electrically connected with an AC power supply, two groups of switches (K1 and K2) of one group of relays at the positive and negative output ends of the AC charging power supply are connected in series to the positive and negative power supply ends of the first rechargeable battery, and two groups of switches (K3 and K4) of the other group of relays at the positive and negative output ends of the AC charging power supply are connected in series to the positive and negative power supply ends of the second rechargeable battery. The positive and negative power supply ends of the first rechargeable battery are connected in series in a load RL circuit through two groups of switches (K7 and K8) of one relay, and the positive and negative power supply ends of the second rechargeable battery are also connected in series in the load RL circuit through two groups of switches (K5 and K6) of another relay. The two ends of the load RL are provided with voltage detecting circuits, the output ends of which are electrically connected with an I / O port of a single chip microcomputer.

Description

technical field [0001] The invention relates to a power supply, in particular to an AC space isolation power supply. Background technique [0002] In many fields such as weak signal amplification or audio amplification, because the power supply is filtered by the AC 220 through the transformer and rectifier circuit, and then supplied to the system voltage through the voltage stabilization circuit, there is always power frequency interference in the signal, which affects the system. quality. [0003] Although there is very little high-frequency interference for switching power supplies, the large-scale high-frequency interference increases. For this reason, some system preamplifiers are powered by batteries to eliminate the interference signals of these systems. However, there is a common ground phenomenon, and the complete elimination of these effects can only be done through optical isolation amplifiers. It increases system cost and complicates system design. [0004] "A...

AI Technical Summary

Problems solved by technology

[0005] However, in some cases, the power supply needs to be completely isolated, and the power requirements are relatively large, and the disclosed technology cannot meet the technical requirements.

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