CN1069807A - Multiple fast and high permeability iron core millivolt measuring instrument - Google Patents
Multiple fast and high permeability iron core millivolt measuring instrument Download PDFInfo
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- CN1069807A CN1069807A CN 92102975 CN92102975A CN1069807A CN 1069807 A CN1069807 A CN 1069807A CN 92102975 CN92102975 CN 92102975 CN 92102975 A CN92102975 A CN 92102975A CN 1069807 A CN1069807 A CN 1069807A
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Abstract
The present invention relates to a kind of high conducting magnet core millivolt value measuring instrument.Its measuring method is not to measure the output millivolt value of iron core from secondary coil, but directly measures the effective value of iron core self-induction electromotive force from primary coil.The output millivolt value basically identical of measurement result and iron core, but and volume, measure fast, be suitable for the examination and test of products of Alperm iron core.
Description
The invention belongs to high conducting magnet core millivolt value measurement method.
The output millivolt value of measuring high conducting magnet core is widely used in the examination and test of products of amorphous soft-magnetic alloy iron core and permalloy iron core manufacturer, checks the quality of every iron core whether to reach the standard of product standard or user's proposition with the method for measuring iron core output millivolt value.As be used for the examination and test of products of the Fe-Ni base amorphous iron core of electric leakage protector and permalloy iron core and high precision electric current transducer with the check of high conducting magnet core etc.
At present, the existing method of measuring iron core output millivolt value is that an iron core is placed on the measuring instrument, after impacting through DC current earlier, import certain alternating current and from the secondary winding of iron core, measure the output millivolt value of iron core, and then carry out the measurement of next iron core with ac millivoltmeter.The weak point of this kind method at first is only can place an iron core on the measuring instrument to measure at every turn, measuring speed is slower, next is that the producer of some survey crew even production is the workload that alleviates measurement, during measurement iron core to be measured not being carried out DC current impacts, measurement can not guarantee the quality of iron core like this, does not also meet the requirement of the producer that uses iron core.
The present invention is significantly improved to the method for present measurement iron core millivolt value, it or not the output millivolt value of measuring iron core, but directly measure the millivolt value of iron core from the primary coil of iron core, just measure the self-induction electromotive force of iron core, very low for high conducting magnet core because of leakage inductance, when the iron core primary and secondary number of turn was 1 circle, this value was very near iron core output millivolt value.At present, the examination and test of products of carrying out high conducting magnet core with the similar method of this kind does not see that as yet report is arranged.
The objective of the invention is to be used for the examination and test of products of high conducting magnet core, can guarantee to make the check of product simpler, faster under the prerequisite of iron core quality.
For the improvement of the present invention to existing measuring method is described, draw above-mentioned two kinds of method measuring principle sketches.Fig. 1 is existing measuring method sketch, and when the primary coil of iron core T had alternating current I1 to pass through, the secondary coil of iron core produced induction electromotive force, measures its effective value by the voltage table V1 that is connected on the secondary coil.Fig. 2 is a measuring method sketch of the present invention, iron core T1, T2, T3, T4, T5 goes here and there on a straight lead jointly, when electric current I 2 during by lead, every iron core to be measured produces self-induction electromotive force on lead, can measure its effective value respectively on the lead at the two ends of every iron core with voltage Table V 2.The millivolt value usefulness voltage Table V 2 that is iron core T1 is at a, and 2 of b measure, T2 at b, 2 of c measure, T3 at c, 2 of d measure, T4 at d, 2 of e measure, at e, 2 of f measure.And how many Zhi Tiexin of string decide fully as required on the lead.
From above simple declaration to two kinds of measuring methods, can find out obviously that the present invention is because of measuring the millivolt value of iron core from the iron core primary wires, removed the secondary coil of iron core, only can on measuring instrument, place the problem that an iron core is measured at every turn thereby solved existing measuring method.Therefore, the present invention has compared tangible advantage with existing measuring method.
One, the millivolt value of iron core makes measuring method more simple directly from the elementary measurement of iron core.
Its two, because of removing the secondary coil of iron core, many Zhi Tiexin can go here and there and measure on a straight lead, have improved measuring speed.
Its three, the shared lead of iron core to be measured impacts and can once finish the DC current of iron core before measuring, and reduces the workload that iron core is measured widely.
The measuring condition that should be pointed out that above-mentioned two kinds of methods is different.Because of the elementary of iron core has electric current to pass through, except the self-induction electromotive force U of iron core, the leakage flux of iron core also will cause induced voltage U σ on coil, add the voltage U R on the coil internal resistance R, so the terminal voltage U1 on the primary coil should be:
U1＝UR+Uσ+U
Or
U1＝RI+jωLσI+U
L σ is an iron core leakage inductance coefficient in the following formula, and ω is an angular frequency.
And the secondary open-circuit condition that is generally of existing measuring method iron core does not have electric current to flow through, and the voltage at coil two ends is not subjected to the influence of coil internal resistance and iron core leakage flux.
By above analysis as can be known, the magnitude of voltage of measuring from primary coil will be higher than from the secondary value of measuring of iron core.And the leakage inductance coefficient L σ of Alperm iron core is very little, working as elementary coil as Fe-Ni base noncrystal alloy iron core φ 11/22 * 20 is 1 circle, during frequency 120Hz, its L σ value is about 5 * 10 Henry, and it is very little that the voltage that is caused by it is compared with the self-induction electromotive force of iron core.The voltage that is caused by the coil internal resistance is just littler.Therefore can think, be similar to the output millivolt value of iron core from the elementary millivolt value of measuring of iron core.
The feature of the preferred embodiments of the invention is: by automatic coupling voltage regulator M2, and resistance R 1, R2, the alternating circuit that contactor K1 and alternating current ammeter A1 form; Transformer M3, diode D1, D2, D3, D4, capacitor C, the DC circuit that contactor K2 and DC ammeter A2 form; Above-mentioned AC-DC Circuit respectively with waver K3, K4, link, waver is controlled two groups of straight leads respectively, straight lead two ends have socket to connect.
Fig. 1 is existing measuring method sketch.
Fig. 2 is an embodiment of the invention measuring method sketch.
Fig. 3 is the electrical schematic diagram of the embodiment of the invention.
Fig. 4 is the structure diagram of the embodiment of the invention.Fig. 4 is made up of three figure, and Fig. 4 (A) is a front view, and Fig. 4 (B) is a side view, and Fig. 4 (C) is the cut-open view of Fig. 4 (B).
Fig. 4 (A) has shown one group as the elementary straight lead 1a of iron core to be measured, totally 20.Straight lead 1a is made by copper rod or copper pipe, and its two ends are connected by public socket 2a and discrete socket 2b respectively and support.Socket 2a, 2b make by copper coin.With insulcrete 3a, 3b socket 2a, 2b and casing 4 are insulated.
Fig. 4 (B) has shown the circuit control panel.
5a, 5b hand over DC ammeter A1, A2.
6a, 6b are respectively keyswitch K1, K2.
Knob 7a is used to regulate the size of alternating current.
Knob 7b is used to regulate the size of DC current.
Knob 9 is used for the size of coarse adjustment alternating current.
Fig. 4 (C) has disclosed another and has organized the elementary straight lead 1b of iron core to be measured, connects the one end by a component vertical cutting seat 2c supports in parallel, and the other end is connected by public socket.3c is an insulcrete.The skeleton 10 of measuring instrument is to be made by the angle steel welding.
This measuring instrument is installed 4 wheels 11, moves it conveniently.
The embodiment of the invention is easy to use, and two groups of straight lead 1a, 1b(are by external diameter Φ 8mm, and internal diameter Φ 5mm, long 600mm copper pipe is made, each 20) 1000 of the iron cores of specification Φ 11/22 * 20mm are placed on the measuring instrument easily.Connect DC circuit switch 6b, adjusting knob 7b after the selected DC current size, stirs waved switch knob 8a, 8b respectively continuously, all iron cores to be measured on the measuring instrument can be carried out DC current and impact.Connect alternating current switch 6a, disconnect DC circuit switch 6b, adjusting knob 9 and 7a select the alternating current size respectively.Respectively have in a lead among straight lead 1a and the 1b this moment has electric current to flow through, and uses the portable digital voltage table just can measure the iron core to be measured on it, stirs knob 8a or 8b after having surveyed again, and the iron core on the straight lead of next bar is measured.Present embodiment can be measured simultaneously by two people, and can use on the production scene.
Can replace existing measuring method to be used for the examination and test of products of Alperm iron core in order to further specify the present invention, use two kinds of measuring methods to measure Fe-Ni base noncrystal alloy iron core and 1J85 soft magnetic alloy core.
Listed data are Fe-Ni base amorphous iron core Φ a 11/22 * 20mm to be measured 10 times result and has measuring method now with the measuring method of the embodiment of the invention measure 10 times result in the table 1.Data in the table 1 show that the data that two kinds of measuring methods are measured are consistent substantially, and the mean value of measurement result is no more than 0.1mv.
Use the embodiment of the invention to measure 10 of 1J85 soft magnetic alloy core Φ 18/24 * 10mm, measurement result sees Table 2.Also listed the result that these 10 iron cores are measured with existing measuring method in the table 2, and write down and measured the used time.The result of two kinds of measuring methods is not only consistent, and the present invention improves measuring speed more than one times.
Claims (3)
1, the high conducting magnet core millivolt of a kind of measurement measuring instrument, it comprises: by automatic coupling voltage regulator M1, transformer M2, resistance R 1, R2, the alternating circuit that contactor K1 and alternating current ammeter A1 form; By transformer M3, diode D1, D2, D3, D4, capacitor C, resistance R 3, R4, the DC circuit that contactor K2 and DC ammeter A2 form; Above-mentioned AC and DC circuit links with waver K3, K4 respectively; Waver is controlled two groups of straight leads respectively, and straight lead two ends have socket to connect; The millivolt value of iron core is to measure with the portable digital milivoltmeter.
2, measuring instrument according to claim 1, wherein said straight lead is made up of copper rod or copper pipe.
3, measuring instrument according to claim 1, wherein two groups of straight leads are respectively 20 compositions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92102975 CN1030415C (en) | 1992-04-28 | 1992-04-28 | Multiple fast and high permeability iron core millivolt measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92102975 CN1030415C (en) | 1992-04-28 | 1992-04-28 | Multiple fast and high permeability iron core millivolt measuring instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1069807A true CN1069807A (en) | 1993-03-10 |
| CN1030415C CN1030415C (en) | 1995-11-29 |
Family
ID=33760990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92102975 Expired - Fee Related CN1030415C (en) | 1992-04-28 | 1992-04-28 | Multiple fast and high permeability iron core millivolt measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1030415C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104217843A (en) * | 2014-09-29 | 2014-12-17 | 厦门振泰成科技有限公司 | Hall current sensor and magnetic ring thereof as well as method for measuring high current by using hall current sensor |
| CN110068778A (en) * | 2019-03-27 | 2019-07-30 | 东华大学 | A kind of U-shaped silicon sheet core automated exchanged cutter and magnetic property detection device |
-
1992
- 1992-04-28 CN CN 92102975 patent/CN1030415C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104217843A (en) * | 2014-09-29 | 2014-12-17 | 厦门振泰成科技有限公司 | Hall current sensor and magnetic ring thereof as well as method for measuring high current by using hall current sensor |
| CN104217843B (en) * | 2014-09-29 | 2016-08-24 | 厦门振泰成科技有限公司 | Hall current sensor and magnet ring thereof, realize Hall current sensor for the method measuring big electric current |
| CN110068778A (en) * | 2019-03-27 | 2019-07-30 | 东华大学 | A kind of U-shaped silicon sheet core automated exchanged cutter and magnetic property detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1030415C (en) | 1995-11-29 |
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