Single-piece permeameter, device for measuring single-piece test sample and measuring method

Abstract

The invention provides a single-piece permeameter, a device for measuring a single-piece test sample and a measuring method. The single-piece permeameter comprises U-shaped double magnetic yokes, a frame, a primary winding, an H coil pair and a secondary winding, wherein the frame is positioned between the U-shaped double magnetic yokes; the primary winding is distributed on the frame; a to-be-tested test sample is arranged in the frame; the H coil pair is positioned below the to-be-tested test sample; the secondary winding is positioned in the primary winding; the secondary winding comprisesthree sub-windings which wind separately, namely a left-side winding, a middle winding and a right-side winging; each of the left-side winding, the middle winding and the right-side winding is provided with an input port and an output port; and one or more of the left-side winding, the middle winding and the right-side winding are selected to connect by connecting the input ports and the output ports of different sub-windings. Through implementation of the invention, the accuracy of measuring the intensity of the magnetic field of the to-be-tested test sample is improved; and magnetic propertyparameters in different areas of the to-be-tested test sample can be measured, the adaptability is improved, and the operation is simple and convenient.

Description

technical field [0001] The invention relates to the technical field of electromagnetic measurement, in particular to a single-chip magnetic permeability meter, a single-chip sample measuring device and a measuring method. Background technique [0002] The no-load loss of the amorphous alloy iron core distribution transformer is low, only equivalent to 35% of the ordinary three-level energy efficiency silicon steel transformer, and the effect of energy saving and loss reduction is obvious. At present, the commonly used test methods for the no-load loss magnetic properties of amorphous alloy strips that we are concerned about include the ring sample method and the single piece sample method. The main disadvantage of the ring sample test method is that the preparation process is lengthy, and the excitation coil needs to be uniform Wound around the entire ring, the sample needs to be decompressed and annealed after winding, especially in the case of low excitation, the measureme...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the large error in the prior art that the single-chip magnetic permeability meter adopts a single H coil to measure the magnetic field strength of the sample to be tested; and the existing single-chip magnetic permeability meter has poor adaptability to samples. The operation is complicated when comparing the uniformity of the sample area, requiring the use of different sizes of magnetic permeability meters and frequent replacement of samples

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