CN110836997A

CN110836997A - Manganese-copper current divider with good electromagnetic compatibility and application thereof

Info

Publication number: CN110836997A
Application number: CN201911177848.0A
Authority: CN
Inventors: 李隐宪; 马鲁; 花海涛
Original assignee: XINYI XINYANG ELECTRONICS Co Ltd
Current assignee: XINYI XINYANG ELECTRONICS Co Ltd
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-02-25

Abstract

The invention discloses a manganin shunt with good electromagnetic compatibility and application thereof. The manganin shunt comprises symmetrically arranged assembling pins (1), a manganin body sheet (2) between the assembling pins (1), an assembling hole (3), a sampling lead binding post (4), a common binding post (5), a antimagnetic sleeve (6) and a load binding post (7); the manganin shunt has novel structure, material saving and good electromagnetic compatibility, and can be used for current limiting, current equalizing sampling detection and the like of loops such as a communication system, an electronic complete machine and an automatic control power supply.

Description

Manganese-copper current divider with good electromagnetic compatibility and application thereof

Technical Field

The invention belongs to the field of shunts, and particularly relates to a manganin shunt with good electromagnetic compatibility and application thereof.

Technical Field

A shunt is an instrument for measuring direct current and is made according to the principle that when direct current passes through a resistor, voltage is generated across the resistor. When a large direct current is measured, for example, several tens of amperes, even more, several hundreds of amperes, and a current meter with a small measuring range is used for measuring the current, a current divider is used. Is a short conductor which can be made of various metals or alloys and is also connected with a terminal; the direct current resistance is strictly adjusted; the direct current flows through the shunt, millivolt direct current voltage signals are generated at two ends of the shunt, meter pointers connected in parallel at two ends of the shunt swing, and the reading is the current value in the direct current circuit. So-called shunting, i.e. dividing a small current to push the meter indication, the smaller the ratio of the small current (mA) to the current (1A-50A) in the large loop, the better and more accurate the linearity of the meter indication reading. Because components such as a relay, a capacitor, an inductor and the like generally exist in the working environment of the shunt, the shunt is often subjected to more serious electromagnetic interference, and the accuracy of measurement is influenced.

Disclosure of Invention

Aiming at the defects, the invention discloses a manganin shunt with good electromagnetic compatibility and application thereof.

In order to achieve the first purpose, the invention adopts the following technical scheme:

the manganin shunt with good electromagnetic compatibility is characterized by comprising symmetrically arranged assembly pins, L-shaped manganin body sheets among the assembly pins, an assembly hole, a sampling lead binding post, a public binding post, an antimagnetic sleeve and a load binding post; the sampling lead binding post is positioned on the L-shaped protruding part of the manganin body and is vertical to the basic plane of the manganin body piece; said common terminal is located on a substantially planar side of said manganin body sheet; the number of the sampling lead binding posts is two, two leads connected with the sampling lead binding posts are spirally wound and then sleeved in the anti-magnetic sleeve, the load binding posts are positioned on the basic plane of the manganin body sheet, and the number of the load binding posts is two; the connection line of the projection of the sampling conductor lug in the basic plane is between the load lugs. The manganin shunt is assembled in place through an assembly hole in an assembly pin, positive and negative leads of a load are respectively connected to a load wiring terminal, positive and negative sampling leads are respectively connected to a sampling lead wiring terminal, and the positive and negative sampling leads are spirally wound and then installed in an antimagnetic sleeve after connection; the antimagnetic sleeve is vertical to the load lead on the load binding post and is not in the same plane; the public binding post is used for connecting a power supply circuit of the measuring meter; the meter converts the voltage drop between the sampling conductor terminals into a current value. According to the invention, the sampling lead is spirally wound and then is arranged in the anti-magnetic sleeve, and the sampling lead and the load lead are arranged in different planes, so that the power frequency magnetic field can be well resisted.

Further, in the manganin shunt with good electromagnetic compatibility, the lead led out by the sampling lead binding post is perpendicular to the lead led out by the load binding post. The sampling lead and the load lead are vertically arranged, so that the power frequency magnetic field is low in efficiency, and the antimagnetic effect is better.

Further, in the manganin shunt with good electromagnetic compatibility, the outer edge of the transition section between the assembling pin and the manganin body piece is designed to be inclined inwards. Through the design of interior slope, can reduce the volume of assembling the pin, save materials.

Furthermore, according to the manganin shunt with good electromagnetic compatibility, the assembling pins are made of insulating materials.

Furthermore, the anti-magnetic sleeve is made of aluminum alloy material. The aluminum alloy material is firm and durable, and the magnetic field shielding effect is good.

Further, the electrical resistivity of the manganin body piece of the manganin shunt with good electromagnetic compatibility is 30-38 mu omega/cm.

Furthermore, in the manganin shunt with good electromagnetic compatibility, the temperature coefficient of resistance of the manganin body sheet is less than or equal to 10^-5/℃。

The second aspect of the invention is illustrated below:

the manganin shunt with good electromagnetic compatibility is applied to current measurement. The current divider is widely used for enlarging the measuring current range of the instrument, and can be used for current limiting, current sharing sampling detection of loops such as a communication system, an electronic complete machine, an automatic control power supply and the like.

The invention has the following beneficial effects: according to the invention, the sampling lead is spirally wound and then is arranged in the anti-magnetic sleeve, and the sampling lead and the load lead are arranged in different planes, so that a power frequency magnetic field can be well resisted, and the sampling lead and the load lead are further vertically arranged, so that the power frequency magnetic field is mutually inefficient, and the anti-magnetic effect is better.

Drawings

FIG. 1 is a top view of example 1 of the present invention;

FIG. 2 is a top view of example 2 of the present invention;

FIG. 3 is a side view of examples 1 and 2 of the present invention;

wherein: 1 assembly pin, 2 manganin body piece, 3 assembly holes, 4 sampling lead terminals, 5 common terminals, 6 antimagnetic sleeves, 7 load terminals, 11 transition sections, 21 basic planes and 22L protruding parts.

Detailed Description

The invention will be further elucidated by means of several specific examples, which are intended to be illustrative only and not limiting.

Example 1

As shown in fig. 1 and 3, the manganin shunt with good electromagnetic compatibility comprises symmetrically arranged assembly pins 1, an L-shaped manganin body piece 2 between the assembly pins 1, an assembly hole 3, a sampling lead binding post 4, a common binding post 5, a antimagnetic sleeve 6 and a load binding post 7; the L-shaped manganin body piece 2 comprises a basic plane 21 and an L-shaped protruding part 22, the assembly hole 3 is positioned on the assembly pin 1, the sampling lead binding post 4 is positioned on the L-shaped protruding part 22 of the manganin body 2 and is vertical to the basic plane 21 of the manganin body piece 2; said common terminal 5 being located on the side of the substantially planar surface 21 of said manganin body sheet 2; the number of the sampling lead binding posts 4 is two, two leads connected with the sampling lead binding posts 4 are spirally wound and then sleeved in the antimagnetic sleeve 6, the load binding posts 7 are positioned on the basic plane 21 of the manganin body sheet 2, and the number of the load binding posts 7 is two; the projection of the sampling conductor terminal 4 onto the base plane 21 is connected between the load terminals 7.

When in work: assembling the manganin shunt in place through an assembling hole 3 on an assembling pin 1, respectively connecting positive and negative leads of a load to a load binding post 7, respectively connecting positive and negative sampling leads to a sampling lead binding post 4, and after connection, mounting the positive and negative sampling leads into an antimagnetic sleeve 6 after spirally winding; the antimagnetic sleeve 6 is vertical to a load lead on the load wiring terminal 7 and is not in the same plane; the common terminal 5 is used for connecting a power supply circuit of a measuring meter (not shown in the figure); the measuring meter converts the voltage drop between the sampling conductor terminals 4 into a current value.

Example 2

As shown in fig. 2 and 3, the manganin shunt with good electromagnetic compatibility comprises symmetrically arranged assembly pins 1 made of insulating materials, an L-shaped manganin body piece 2, an assembly hole 3, a sampling lead binding post 4, a common binding post 5, a antimagnetic sleeve 6 made of aluminum alloy, a load binding post 7 and a transition section 11, wherein the L-shaped manganin body piece 2, the assembly hole 3 and the sampling lead binding post are arranged between the assembly pins 1; the L-shaped body piece 2 of manganin comprises a basic plane 21 and an L-shaped protruding part 22, the assembly hole 3 is positioned on the assembly pin 1, and further, the outer edge of the transition section 11 between the assembly pin 1 and the body piece 2 of manganin is designed to be inclined inwards; the sampling conductor post 4 is positioned on the L-shaped projection 22 of the manganin body 2 and is vertical to the basic plane 21 of the manganin body piece 2; said common terminal 5 being located on the side of the substantially planar surface 21 of said manganin body sheet 2; the number of the sampling lead terminals 4 is two, two leads connected with the sampling lead terminals are spirally wound and then sleeved in the antimagnetic sleeve 6, the load terminals 7 are positioned on the basic plane 21 of the manganin body piece 2, the number of the load terminals 7 is two, and a connecting line of the projections of the sampling lead terminals 4 on the basic plane 21 is arranged between the load terminals 7; in particular, the lead wire led out from the sampling lead wire binding post 4 is vertical to the lead wire led out from the load binding post 7; further, the electrical resistivity of the manganin body sheet 2 is 30-38 mu omega/cm, and the temperature coefficient of resistance is less than or equal to 10-5/° C.

When in work: assembling the manganin shunt in place through an assembling hole 3 on an assembling pin 1, respectively connecting positive and negative leads of a load to a load binding post 7, respectively connecting positive and negative sampling leads to a sampling lead binding post 4, and after connection, mounting the positive and negative sampling leads into an antimagnetic sleeve 6 after spirally winding; the antimagnetic sleeve 6 is vertical to a load lead on the load wiring terminal 7 and is not in the same plane; the common terminal 5 is used for a power supply circuit of an ammeter (not shown in the figure); the millivolt voltmeter in the ammeter is converted to a current value by measuring the voltage drop between the sampling conductor terminals 4.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.

Claims

1. The manganin shunt with good electromagnetic compatibility is characterized by comprising symmetrically arranged assembly pins (1), L-shaped manganin body pieces (2) among the assembly pins (1), an assembly hole (3), a sampling lead binding post (4), a common binding post (5), a antimagnetic sleeve (6) and a load binding post (7); the L-shaped manganin body piece (2) comprises a basic plane (21) and an L-shaped protruding part (22), the assembly hole (3) is positioned on the assembly pin (1), the sampling lead binding post (4) is positioned on the L-shaped protruding part (22) of the manganin body (2) and is vertical to the basic plane (21) of the manganin body piece (2); said common terminal (5) being located on a side of a substantially planar surface (21) of said manganin body sheet (2); the number of the sampling lead binding posts (4) is two, two leads connected with the sampling lead binding posts are spirally wound and then sleeved in the antimagnetic sleeve (6), the load binding posts (7) are positioned on the basic plane (21) of the manganin body sheet (2), and the number of the load binding posts (7) is two; the projected connecting line of the sampling conductor post (4) on the basic plane (21) is between the load posts (7).

2. The manganin shunt with good electromagnetic compatibility according to claim 1, characterized in that the lead wire led out from the sampling lead wire binding post (4) and the lead wire led out from the load binding post (7) are perpendicular to each other.

3. An emc diverter according to claim 1, characterized by the fact that the outer edge of the transition (11) between the assembly leg (1) and the manganin body piece (2) is designed with an inward inclination.

4. The manganin shunt with good electromagnetic compatibility according to claim 1, wherein the assembly pin (1) is made of an insulating material.

5. The manganin shunt with good electromagnetic compatibility according to claim 1, wherein the antimagnetic sleeve (6) is made of aluminum alloy.

6. The manganin shunt with good electromagnetic compatibility according to claim 1, wherein the resistivity of the manganin body sheet (2) is 30-38 μ Ω/cm.

7. The manganin shunt of claim 1, wherein the temperature coefficient of resistance of the manganin body sheet (2) is less than or equal to 10^-5/℃。

8. Use of a good EMC manganin shunt according to any one of claims 1 to 7 in current measurement.