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Title:
INPUT VOLTAGE SIGNAL SAMPLING CIRCUIT IN THREE-PHASE THREE-WIRE SYSTEM PFC CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2018/176184
Kind Code:
A1
Abstract:
An input voltage signal sampling circuit in a three-phase three-wire system PFC circuit, the sampling circuit comprising a module (100) for sampling an input voltage signal of a first phase, a module (200) for sampling an input voltage signal of a second phase and a module (300) for sampling an input voltage signal of a third phase, wherein the module (100) for sampling the input voltage signal of the first phase comprises a first reference ground setting circuit (101), a first voltage division circuit (102), a second voltage division circuit (103), a first operational amplifier (104) and a first output circuit (105); the module (200) for sampling the input voltage signal of the second phase comprises a second reference ground setting circuit (201), a third voltage division circuit (202), a fourth voltage division circuit (203), a second operational amplifier (204) and a second output circuit (205); and the module (300) for sampling the input voltage signal of the third phase comprises a third reference ground setting circuit (301), a fifth voltage division circuit (302), a sixth voltage division circuit (303), a third operational amplifier (304) and a third output circuit (305). The input voltage signal sampling circuit can, without a neutral line, acquire an input voltage signal in a three-phase three-wire system PFC circuit.

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Inventors:
LIU PEIJIA (CN)
ZHAO DEQI (CN)
WU RENHUA (CN)
Application Number:
PCT/CN2017/078226
Publication Date:
October 04, 2018
Filing Date:
March 25, 2017
Export Citation:
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Assignee:
SHINRY TECH CO LTD (CN)
International Classes:
G01R19/25
Foreign References:
CN104181383A2014-12-03
CN202486207U2012-10-10
CN104518517A2015-04-15
CN202522633U2012-11-07
US7095215B22006-08-22
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
Download PDF:
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