CN205539082U - Low resistance exchanges ohm etalon - Google Patents

Abstract

The utility model discloses a low resistance exchanges ohm etalon, the patent relates to the field and for electromagnetic measurement, mainly measures the AC resistance magnitude under the frequency of utilization, and its resistance is 1 ohm, 0.1 ohm, 0.01 ohm, 0.001 ohm. This low resistance exchanges ohm etalon functional character, power is 10W, and the precision is 0.01% and 0.005% respectively, and the frequency is 50Hz, 400Hz, 1000Hz, is applicable to the volume biography of alternating current resistance and the standard utensil of proofreading and correct, like capability test to the cable conductor, the aassessment of large capacity switch, the efficiency research of motor. The utility model discloses low resistance exchanges ohm etalon is basic resistance material by novel manganese -base alloy, and resistor structure is planar structure parallel combination, and four terminals are drawn forth and shielding structure, reduces the influence quantity of the remaining inductance of distributed capacitance, reduces the influence of electrostatic induction and magnetic field.

Description

Low resistance exchanges ohm standard

Technical field

This utility model patent relates to electromagnetic measurement transmission and the standard equipment technical field of correction, is low resistance exchange rate ohm value.

Background technology

To having the correction of test instrumentation of AC resistance function and the supporting of AC resistance detecting system, it it is requisite basic standard device, simultaneously when using exchange ohm standard, the resistance accuracy of exchange ohm standard directly influences the correction accuracy of tested instrument with exchanging index.This low resistance exchanges the correction that ohm standard is low resistance alternating current resistance simultaneously, solves the numeraire of key, directly determines the accuracy of tested value.

Utility model content

The purpose of this utility model is to solve above-mentioned technical problem, it is provided that low resistance exchanges ohm standard, accurately meets the supporting demand of different calibration equipments to realizing AC resistance resistance.

This utility model adopts the technical scheme that:

Low resistance exchanges ohm standard, including two conductive plates and two potential ends, between said two conductive plate, connect multiple resistance sheet, in the centre position of said two conductive plate, being respectively welded and arrange said two potential end, two conductive plates are two potential ends

Further, the plurality of resistor disc is positioned at the centre position of described conductive plate.

Further, the terminals seat that connection end is current terminal is set in said two conductive plate upper end.

Further, described connection end is welded on described conductive plate by welding material, and described multi-disc resistor disc passes through welding material, is welded on described conductive plate, described potential end is welded on described conductive plate by welding material, and described welding material includes the silver-bearing copper material that silver content is 60% to 80%.

Further, described resistor disc is multi-disc, and parallel connection is welded in the middle of said two conductive plate.

Further, one or more in described polylith resistor disc is connected on described conductive plate after carrying out bending.

Further, described plate of conductive material is bent into U-shaped or double U-shaped.

Further, described connection end, conductive plate and the structure material such as potential contact, current terminal terminal are red copper material.

The beneficial effects of the utility model are:

1, low resistance exchange ohm standard scope 1 ohm, 0.1 ohm, 0.01 ohm, 0.001 ohm；

2, low resistance exchanges ohm standard accuracy, 50ppm, 100ppm；

3, AC resistance device frequency 50Hz, 400Hz, 1000Hz.

Accompanying drawing explanation

Accompanying drawing 1 is the front view of this utility model first embodiment；

Accompanying drawing 2 is the top view of this utility model first embodiment；

Accompanying drawing 3 is the resistor disc figure of this utility model first embodiment；

Accompanying drawing 4 is the front view of this utility model the second embodiment；

Accompanying drawing 5 is the top view of this utility model the second embodiment；

Accompanying drawing 6 is the resistor disc figure of this utility model the second embodiment；

Accompanying drawing 7 is the front view of this utility model the second embodiment；

Accompanying drawing 8 is the top view of this utility model the second embodiment；

Accompanying drawing 9 is the resistor disc figure of this utility model the second embodiment.

Label in accompanying drawing is respectively as follows:

1. connect end；2. connect end；3. conductive plate；4. conductive plate；5. resistor disc；6. potential end；7. potential end.

Detailed description of the invention

The detailed description of the invention that this utility model exchanges ohm standard below in conjunction with the accompanying drawings elaborates.

Embodiment

Seeing accompanying drawing, low resistance exchanges ohm standard and includes connecting end 1, connecting end 2, connects end 1 and passes through to be welded to connect on conductive plate 3, connects end 2 by being welded to connect on conductive plate 4.Conductive plate 3 and conductive plate 4 have certain width, welding kesistance sheet 5 between conductive plate 3 and conductive plate 4, and the resistance according to resistor disc 5 is different, it is achieved exchange ohm standard Accurate Calibration to alternating current resistance by low resistance.In the present embodiment, multi-disc resistor disc 5 is used to be arranged in parallel between conductive plate 3 and conductive plate 4, multi-disc resistor disc 5, it is symmetricly set between conductive plate 3 and conductive plate 4, the spacing between every side resistance sheet 5 is equal.In the vertical direction, the position of resistor disc 5 is positioned at conductive plate 3 and the centre of conductive plate 4 so that it is precision is higher.On conductive plate 3 and conductive plate 4, being welded to connect potential end 6 and potential end 7, the sample position of potential end 7 is directly connected to low resistance and exchanges the functional parameter of ohm standard, and the position being computed potential end is taken at conductive plate 4 centre position.Multiple resistor discs 5 are at 1 ohm, 0.1 ohm, 0.01 ohm, 0.001 ohm, when frequency bears 100W power when 50Hz, 400Hz, 1000Hz, accuracy rate is between 50ppm～100ppm, resistor disc 5 is matrix by accurate sheet material manganese-base alloy, based on conductive plate is by the red copper material of special processing.Welding material by the silver-copper brazing alloy that silver content is 60% to 80% be intermediate materials, preferably silver content be 70% silver-copper brazing alloy.Connect end 1, connection end 2, conductive plate 3, conductive plate 4, potential end 6, potential end 7 all can use red copper material.

The above is only preferred implementation of the present utility model; it should be pointed out that, for those skilled in the art, on the premise of without departing from this utility model principle; can also make some improvements and modifications, these improvements and modifications also should be regarded as protection domain of the present utility model.

In description of the present utility model, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " length ", " width ", " thickness ", on " ", D score, " front ", " afterwards ", " left ", " right ", " vertically ", " level ", " push up ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", orientation or the position relationship of the instruction such as " circumferential " are based on orientation shown in the drawings or position relationship, it is for only for ease of description this utility model and simplifies description, rather than indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.

Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or implicitly include one or more this feature.In description of the present utility model, " multiple " are meant that two or more, unless otherwise expressly limited specifically.

In this utility model, unless otherwise clearly defined and limited, term " is installed ", " being connected ", " connection ", the term such as " fixing " should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be connection or the interaction relationship of two elements of two element internals.For the ordinary skill in the art, above-mentioned term concrete meaning in this utility model can be understood as the case may be.

In this utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of fisrt feature level height higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second feature.

In the description of this specification, the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means that the specific features, structure, material or the feature that combine this embodiment or example description are contained at least one embodiment of the present utility model or example.In this manual, the schematic representation of above-mentioned term is necessarily directed to identical embodiment or example.And, the specific features of description, structure, material or feature can be to combine in one or more embodiments in office or example in an appropriate manner.Additionally, in the case of the most conflicting, the feature of the different embodiments described in this specification or example and different embodiment or example can be combined and combine by those skilled in the art.

Although above it has been shown and described that embodiment of the present utility model, it is understandable that, above-described embodiment is exemplary, it is not intended that to restriction of the present utility model, above-described embodiment can be changed in the range of this utility model, revises, replace and modification by those of ordinary skill in the art.

Claims (8)

1. low resistance exchanges ohm standard, including two conductive plates and multiple resistor disc, it is characterised in that: between said two conductive plate, connect multiple resistor disc, in the centre position of said two conductive plate, be respectively welded and two potential ends are set.

Low resistance the most according to claim 1 exchanges ohm standard, it is characterised in that: the plurality of resistor disc is positioned at the centre position of described conductive plate.

Low resistance the most according to claim 1 exchanges ohm standard, it is characterised in that: in said two conductive plate upper end, connection end is set.

Low resistance the most according to claim 3 exchanges ohm standard, it is characterized in that: described connection end is welded on described conductive plate by welding material, the plurality of resistor disc is welded on described conductive plate by welding material, described potential end is welded on described conductive plate by welding material, and described welding material includes the silver-bearing copper material that silver content is 60% to 80%.

Low resistance the most according to claim 4 exchanges ohm standard, it is characterised in that: described resistor disc is polylith, and parallel connection is welded in the middle of said two conductive plate.

Low resistance the most according to claim 4 exchanges ohm standard, it is characterised in that: polylith in described polylith resistor disc or polylith are connected on described conductive plate after carrying out bending.

Low resistance the most according to claim 4 exchanges ohm standard, it is characterised in that: described resistor disc is bent into U-shaped or double U-shaped.

Low resistance the most according to claim 4 exchanges ohm standard, it is characterised in that: described connection end, conductive plate and potential end are red copper material.