Differential pressure sensor circuit of rectifying circuit

Abstract

The utility model discloses a rectification circuit differential pressure sensor circuit, which comprises a rectifier bridge module, a photoelectric isolation voltage reduction module and a signal processing module, and is characterized in that the rectifier bridge module comprises a thyristor U1, a thyristor U2, a thyristor U3, a thyristor U4, a thyristor U5 and a thyristor U6; the anode of the thyristor U1, the anode of the thyristor U2 and the anode of the thyristor U1 are connected to form the anode output end CD + of the rectifier bridge module. The optoelectronic isolation voltage reduction module comprises a first isolation voltage reduction unit and a second isolation voltage reduction unit, the high-voltage input end of the first isolation voltage reduction unit and the low-voltage input end of the second isolation voltage reduction unit are connected with each other to form a mains supply access end, and the mains supply access end is used for being connected to an A-phase mains supply, a B-phase mains supply or a C-phase mains supply. The rectifying circuit differential pressure sensor circuit solves the problem that in the prior art, the output ends of each pair of photoelectric coupling unit A and photoelectric coupling unit B are connected to a control module through a comparison unit and an amplification unit.

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