Title:
SHUNT LEAD STRUCTURE, ELECTRIC POWER INSTRUMENT AND METHOD FOR MANUFACTURING SHUNT LEAD STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2021/169456
Kind Code:
A1
Abstract:
A shunt lead structure (1), an electric power instrument and a method for manufacturing the shunt lead structure (1). The shunt lead structure (1) comprises a shunt (2, 2') and a PCB lead plate (3, 3'); the shunt (2, 2') is provided with a voltage end (21, 21'), a first sampling end (22, 22') and a second sampling end (23, 23') in sequence around a resistor body (20, 20') along a current flow direction; the PCB lead plate (3, 3') is at least a PCB board with double-sided metal holes or multiple layers of metal holes, and the PCB lead plate (3, 3') is provided with a voltage connecting end (31, 31'), a first sampling connecting end (32, 32') and a second sampling connecting end (33, 33') which correspond to the shunt (2, 2'); a circuit of the first sampling connecting end (32, 32') on the PCB lead plate (3, 3') extends to the position of the second sampling connecting end (33, 33') in parallel along the resistor body (20, 20') of the shunt (2, 2'), and extends, together with a circuit of the second sampling connecting end (33, 33'), to the other end of the PCB lead plate (3, 3') via a section-hole twisting state of the PCB lead plate (3, 3'), so that a first sampling circuit lin+ (321) and a second sampling circuit Iin- (331) are formed to sample the shunt (2, 2'), respectively. In this way, induction current generated by external magnetic interference is reduced, and the detection accuracy is improved.
Inventors:
ZHU YONGHU (CN)
Application Number:
PCT/CN2020/132749
Publication Date:
September 02, 2021
Filing Date:
November 30, 2020
Export Citation:
Assignee:
ZHEJIANG YONGTAILONG ELECTRONIC CO LTD (CN)
TONGXIANG WEIDA ELECTRONIC CO LTD (CN)
TONGXIANG WEIDA ELECTRONIC CO LTD (CN)
International Classes:
G01R15/14; G01R11/04; G01R22/06
Foreign References:
| CN111190036A | 2020-05-22 | |||
| CN211856700U | 2020-11-03 | |||
| CN110702956A | 2020-01-17 | |||
| CN210090554U | 2020-02-18 | |||
| CN107345977A | 2017-11-14 | |||
| CN107271744A | 2017-10-20 | |||
| CN203587681U | 2014-05-07 | |||
| CN209513907U | 2019-10-18 | |||
| JP2012220248A | 2012-11-12 |
Attorney, Agent or Firm:
SUZHOU JIABO INTELLECTUAL PROPERTY AGENCY (CN)
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