Double-superposition test device of layer resistance of silicon steel sheets
A technology of interlayer resistance and testing equipment, which is applied in the direction of testing dielectric strength, etc.
Active Publication Date: 2012-08-29
SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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Problems solved by technology
In the present invention, when the pressure is applied, the test area and the calculated area will not have the problem of inconsistency, and the insulation performance of the fixed coating area superimposed on the top and bottom can be accurately measured
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[0013] Such as figure 1 and figure 2 As shown, a double-layer superposition test device for interlayer resistance of silicon steel sheets, which includes upper and lower silicon steel sheets 1 and 2 with insulating coatings, a DC constant current source, a digital voltmeter, inserted into the upper and lower silicon steel sheets 1, The electrodes 4, 5 of 2 and the pressure transmission device 7 comprising the indenter 8, the area and shape of the upper layer silicon steel sheet 1 are consistent with the indenter 8, the area of the lower layer silicon steel sheet 2 is greater than the area of the upper layer silicon steel sheet 1, the There are four electrodes 4 and 5, and the four electrodes 4 and 5 are respectively connected to a DC constant current source and a digital voltmeter, and the digital voltmeter measures the voltage drop of the superimposed insulating coating 9 .
[0014] In the silicon steel sheet interlayer resistance double-layer stacking test device, the ...
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The invention relates to performance test of silicon steel sheets, in particular to a test device and a test method of the electrical property of the silicon steel sheets. A double-superposition test device of the layer resistance of the silicon steel sheets comprises an upper layer of silicon steel sheets, a lower layer of silicon steel sheets, a direct-current constant current source, a digital voltmeter, electrodes and a pressure transferring device, wherein the upper layer of silicon steel sheets and the lower layer of silicon steel sheets are provided with insulating coatings; the electrodes are inserted into the upper layer of silicon steel sheets and the lower layer of silicon steel sheets; and the pressure transferring device comprises a pressure head. The area and the shape of the upper layer of silicon steel sheets are consistent with those of the pressure head, and the area of the lower layer of silicon steel sheets is larger than the area of the upper layer of silicon steel sheets. The number of the electrodes is four, and the four electrodes are respectively connected into the direct-current constant current source and the digital voltmeter. The digital voltmeter is used for testing the voltage drop of the superimposed insulating coatings. According to the double-superposition test device, the test area and the calculate area caused by pressure application cannot generate the problem of inconformity, and the insulating property of the upper and lower superimposed fixed coating area can be accurately measured.
Description
technical field [0001] The invention relates to performance testing of a silicon steel sheet, in particular to a testing device and a testing method for the electrical performance of a silicon steel sheet. Background technique [0002] The coating insulation performance of silicon steel sheet is an important index to evaluate the quality of silicon steel products. There are two methods commonly used in the world, one method is the International Electrotechnical Commission "Determination of Surface Insulation Resistance of Magnetic Steel Sheet and Strip (IEC60404-11: 1999)" standard. This method evaluates the insulation performance of the coating by applying a specified voltage on one side of the silicon steel sheet and measuring the current passing through the coating. This method inevitably produces contact resistance during operation, which leads to large dispersion of test results. The second method is the American standard "Standard method for testing interlayer resist...
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IPC IPC(8): G01R31/12
Inventor 胡志远沈杰周星李平
Owner SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE