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Discharge charge amount measuring method and device

A measurement method and a technology of a measurement device, which are applied in the direction of measuring devices, measuring electrical variables, circuits, etc., can solve problems such as the inability to correctly predict the life of wires, and achieve the effect of correctly predicting the life of wires

Active Publication Date: 2014-06-18
PROTERIAL LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So the V-t experiment sometimes cannot correctly predict the life of the wire

Method used

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  • Discharge charge amount measuring method and device
  • Discharge charge amount measuring method and device
  • Discharge charge amount measuring method and device

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Embodiment approach ）

[0087] As mentioned above, although embodiment of this invention was concretely demonstrated, this invention is not limited to the said embodiment, Various changes are possible in the range which does not deviate from the summary.

[0088] In the above-mentioned embodiment, although the two data loggers 6A and 6B are used, it is not limited to this. That is, the discharge electric charge measurement device 1 may include three or more data loggers.

[0089] In the embodiment described above, the operation is started from the data logger 6A, but the operation is not limited thereto, and the operation may be started from the data logger 6B. In addition, when the discharge charge measurement device 1 is equipped with more than three data loggers, if the three data loggers can be alternately operated at predetermined intervals to continuously measure and record the voltage applied to the capacitor 4, any one of the data loggers can be The recorder starts to move.

[0090] In the ...

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Abstract

The invention provides a discharge charge amount measuring method and a discharge charge amount measuring device, so as to more accurately evaluate service lifetime of a lead wire. The discharge charge amount measuring method includes generating a partial discharge in a sample by applying a voltage from a voltage impressing device connected to the sample, the voltage being higher than a partial discharge inception voltage, continuously measuring and recording terminal voltages of a capacitor connected in series between the sample and a ground at least until a breakdown of the sample occurs by alternately operating at least two data loggers connected to the capacitor at intervals of a predetermined time, calculating an amount of electric charge discharged from the sample and remaining in the capacitor by multiplying a difference in the recorded terminal voltages of the capacitor by a capacitance of the capacitor, and calculating an accumulated discharge amount by accumulating the discharged amount of electric charge at earliest until the breakdown of the sample occurs.

Description

technical field [0001] The present invention relates to a discharge charge amount measuring method and a discharge charge amount measuring device for measuring, for example, a discharge charge amount which is an indicator of life expectancy of electric wires such as enameled wires. Background technique [0002] Electric wires such as enameled wires are formed by surrounding a conductor with an insulator (insulating film). Partial discharges sometimes occur on such wires. Partial discharge is caused by a small gap in the insulator of the wire or between the conductor and the insulator, where the electric field is concentrated and a weak discharge occurs. Occurrence of partial discharges causes aging of insulators, resulting in insulation breakdown. [0003] In addition, in recent years, from the viewpoint of energy saving and high efficiency, there has been a technique of driving a motor using an inverter power supply to perform variable-speed operation. The voltage applie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCH01B13/00G01R31/14G01R31/1272G01R31/024G01R31/12G01R31/1227G01R31/1263
Inventor 角阳介千绵直文菊池英行
Owner PROTERIAL LTD
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