Transformer silicon steel production quality control program
The first step: pre-purchase inspection of the steel sheet By the silicon steel sheet silicon steel suppliers asked to provide samples and the corresponding grades of data, such as P1.0, P1.5, P1.7, etc..
By MATS-2010M Silicon measuring device on the samples provided by the supplier to measure performance to determine whether the sample data provided with the same supplier. If the supplier can not provide data, technical department has its own plant to determine whether the eligible sample. Epstein laps with 25cm steel sheet, the accuracy is better than 1%.
Second step: check the time of purchase of the steel sheet To avoid vendor supplied perpetrating a fraud in the procurement field testing when necessary. With ATS-100M iron loss silicon steel measuring field test: The sample above measured as the standard, test the value of P1.7. Sampling the actual delivery, as compared with the sample data, you can determine whether the sample supply line. ATS-100M test the repeatability of silicon steel was ± 1%, 5% accuracy, can meet the testing requirements.
Comparison test, ATS-100M required must be greater than the size of silicon steel measured 2cm × 5cm.
Third step: The ATS-100M steel sheet good separation Chong Low quality silicon steel sheet, in the same piece, the iron loss in different regions may have quite different. In order to quality for more precise control, but also a good hedge classification silicon steel. Using the ATS-100M can well meet the requirements, ± 1% repeatability can correctly distinguish the merits of silicon steel.
Classification tests, ATS-100M required greater than 2cm in length measured silicon steel can. Step: The MATS-2010M direct measurement of the magnetization curves and core loss curves can be used as the basis for transformer design. Engineers can determine the core magnetization curve operating point, according to calculated core loss curve in the operating point of the heat.
ATS-100M measuring iron loss silicon steel sheet with reference to GB GB/T13789-92 of measurement, control technology and the use of A / D, D / A combination of built-in sine wave excitation power, the direct display of iron Loss Ps value (W / kg).
Suitable for measuring the thickness of the cold variety of orientations, non-oriented silicon steel sheet and hot rolling;
Test results without copper loss, iron loss measurement to ensure a more realistic; Test to maintain sinusoidal magnetic flux Bs, effective elimination of harmonics; Test probe to join the air flux compensation coil, to ensure more accurate results; According to test data, use of hand-painted paper and draw the coordinates of Ps-B depletion curve, comparison of materials.
Features Power supply AC 220V ± 10% 50Hz, 1A Display 4 LED digital display Test frequency 50Hz, 60Hz freedom of choice Magnetic induction setting range Bs1: 0.5 ~ 1.0T Bs2: 1.0 ~ 1.5T Bs3: 1.5 ~ 1.9T Thickness Range 0.10 ~ 0.50mm
Silicon steel size requirements 40mm × 40mm, the surface smooth Test repeatability ± 1% Test the accuracy of 5% (by conversion to the square circle square circle sample test results)
Display refresh rate six times / sec Metal chassis Dimension: 235 × 90 × 330mm (width × height × depth) MATS-2010M silicon steel measuring device Automatic measurement soft (silicon) material in 50Hz, 60Hz, 400Hz and 1kHz for Dynamic hysteresis loop, accurate measurement of amplitude permeability a, loss of angle , the total loss than the Ps, remanence Br, coercivity Dynamic magnetic coercive force Hc and other parameters.
Using Windows measurement software, easy to use. Products meet China national standard GB/T3655-92, GB/T13789-92 and international standard IEC60404-6 requirements.
By computer control and A / D sampling, to replace traditional analog power supply (Bridge), frequency meter, ammeter, voltmeter and power meter, the entire testing procedure is automated.
Features Test sample types: hot-rolled, cold rolled oriented and non oriented silicon steel material, permalloy, amorphous and nanocrystalline.
The shape of test samples: strip, sheet and other open samples, ring, E-shaped, U-shaped samples such as closed circuit.
Open samples were composed of closed loop magnetic Epstein, permeability meter can also be optional. Direct measurement of the sample winding closed, finished transformer can be measured directly.
Samples (core), magnetic coil (N1), measuring coil (N2) together form a load transformer. Magnetic coil circuit connected in series without feeling resistance, by measuring the pressure drop without sense resistor to determine the magnetization current, by the magnetic field strength, magnetic field peak locking achieved by digital feedback, magnetic lock precision of 0.5%.
Coil voltage by measuring the digital integration to get the magnetic flux density, magnetic induction peak of locking achieved by digital feedback, magnetic induction locking precision of 0.2%.
Power source and the sampling amplifier in a single chassis, making installation of the interface is very simple: an RS232 interface with computer connections, Èr voltage signal received A / D card.
Voltammetry and digital integration by measuring the dynamic hysteresis loop can be measured a, , Ps, Br and Hc parameters such as dynamic magnetic properties.
Automatic continuous measurements up to 255 test points, test points for each test takes about 30 seconds, multiple choice test, a fixed frequency, fixed Bm or fixed Hm.
Powerful software test personnel on the technical requirements is very low.
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