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Tester and testing method for winding lead material of transformer

A technology of transformer windings and testing methods, applied in the direction of material impedance, etc., can solve problems such as sharp increase in production costs of transformer products, undetectable detection methods, and difficulties in operating trustworthy enterprises

Active Publication Date: 2010-06-09
淄博计保互感器研究所(有限公司)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the second half of 2005, the price of copper wire rose sharply, and the production cost of transformer products increased sharply. Due to market constraints, the sales price of transformers could not increase at the same rate, which caused difficulties in the operation of transformer manufacturers.
Consumers who do not know the truth have been deceived to varying degrees, but what they bought at high prices are low-quality counterfeit transformers. This kind of unfair competition has caused difficulties for trustworthy enterprises.
[0003] Since the product is installed inside the metal box of the transformer after it is manufactured, counterfeiters use copper for the lead wire and the first-layer coil, and aluminum for the inside, which makes it difficult to detect the counterfeit. The current detection method cannot detect the problem. Only when the product is disassembled can the problem be found. It brings great difficulties to the quality acceptance of transformers and gives counterfeiters an opportunity

Method used

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  • Tester and testing method for winding lead material of transformer
  • Tester and testing method for winding lead material of transformer
  • Tester and testing method for winding lead material of transformer

Examples

Experimental program
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Embodiment 1

[0020] like figure 1 As shown in the figure, a DC power supply, a processor, a voltage sampling sensor, a current sampling sensor and a display are arranged in the casing, and a connection terminal is arranged outside. The input end of the processor is respectively connected to the voltage sampling sensor and the current sampling sensor, the data end of the processor is connected to the storage, and the output end of the processor is connected to the display. The output end of the DC power supply is connected to the connection terminals arranged outside the casing through wires. The voltage sampling sensor is arranged on both sides of the output end of the DC power supply. The current sampling sensor is arranged on the wire between the DC power supply and the connection terminal. The DC power supply includes a voltage regulator, a booster and a rectifier voltage regulator unit. The input end of the voltage regulator is connected to the AC power supply, the output end of the...

Embodiment 2

[0030] like image 3 Shown: apply constant current DC power to the transformer winding of known material, and sample the current to obtain a constant value of current I 0 , the voltage is sampled to obtain the initial voltage V 0 , get the starting resistance R of the transformer winding of known material 0 , continue to energize, the winding will continue to heat up within a certain period of time T, and the winding resistance will change R=R 0 +ΔR, by recording the changing voltage V of the voltage sampling during this time T xn and the constant value of the current I 0 , and calculate the standard time-resistance curve of the resistance of the standard transformer winding as a function of the heating time. For the tested transformer windings marked with the same capacity and the same wiring method as the standard transformer windings, apply a constant current DC source under the same temperature conditions, and sample the current to obtain a constant value of current I ...

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Abstract

The invention discloses a tester and a testing method for the winding lead material of a transformer, belonging to the field of electric measuring instruments, in particular to the field of power supply apparatus detection. The tester comprises a direct current power source, a voltage sampling sensor and a current sampling sensor which are all arranged in a shell; a connecting terminal arranged outside the shell, a processor, a storage and a display; the input end of the processor is respectively connected with the voltage sampling sensor and the current sampling sensor, the data terminal of the processor is connected with the storage, the output end of the processor is connected with the display, the output end of the direct current power source is connected with the connecting terminal at the outer side of the shell by a lead, the voltage sampling sensor is arranged at two sides of the output end of the direct current power source, the current sampling sensor is arranged on the lead between the direct current power source and the connecting terminal. By adopting the invention, different material coils can be conveniently detected and distinguished, thereby preventing users from cheating.

Description

technical field [0001] The invention relates to a transformer winding wire material tester and a test method thereof, belonging to the field of electrical measuring instruments, in particular to the field of power supply equipment testing. Background technique [0002] In the second half of 2005, the price of copper wire rose sharply, and the production cost of transformer products increased sharply. Due to market constraints, the selling price of transformers could not increase at the same rate, which caused the difficulties in the operation of transformer manufacturers. This provides an opportunity for some irresponsible enterprises to cheat, use aluminum wires instead of copper wires to produce transformers, and do not mark models containing aluminum in accordance with the standard JB3837-1996 "Measures for Model Compilation of Transformer Products". This trend is spreading rapidly. It has now spread to dry-type transformers. Some manufacturers use semi-aluminum or all-a...

Claims

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Application Information

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IPC IPC(8): G01N27/02
Inventor 荣潇荣博王敏
Owner 淄博计保互感器研究所(有限公司)
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