Detection circuit diagram of AC side voltage Us based on SG3525
Source: InternetPublisher:已注销 Keywords: AC amplifier power supply AC/DC Updated: 2020/07/02
This article introduces the detection of AC side voltage Us. By filtering and rectifying the synchronization signal on the secondary side of the synchronization transformer, a relatively stable DC power can be obtained and sent to the A/D conversion port of the DSP. Since it involves the problem of common ground, a full-wave precision rectification circuit using an operational amplifier is used, as shown in the figure below:
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