Alternating current and direct current contactor coil power consumption tester
A technology of coil power consumption and contactor, which is applied in the direction of electric power measurement through the application of digital technology, can solve the problems that power testers and power analyzers do not meet special requirements, low precision, and can only test, etc., to solve dynamic problems. High-precision measurement of power consumption and the effect of high measurement accuracy
Active Publication Date: 2019-07-23
FUJIAN INSPECTION & RES INST FOR PROD QUALITY
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Problems solved by technology
At present, instruments that can directly measure power consumption include power testers and power analyzers, but if they are directly used to measure the power consumption of AC and DC contactor coils, there will be the following disadvantages: (1) Special power testers can only test static The power consumption value of the contactor, the entire pull-in process of the contactor only needs tens of milliseconds to tens of milliseconds, so the power tester cannot measure the power consumption in the pull-in phase, and can only test the power consumption after the contact pull-in is stable; (2) High-precision power analyzer products need to be equipped with AC and DC voltage and current probes, but current probes that can measure small currents (5A and below) at home and abroad are low in accuracy and expensive, and cannot meet the test requirements
Therefore, with the improvement of detection requirements, traditional power testers and power analyzers do not meet special requirements, and it is necessary to improve and upgrade
Method used
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Embodiment Construction
[0008] In order to facilitate the understanding of the present invention, the present invention will be further described below through the specific implementation examples of the accompanying drawings. (but not limitation of the invention).
[0009] Such as figure 1 As shown, the AC / DC contactor coil power consumption tester of the present invention includes a Hall voltage sensor (U1), a Hall current sensor (U2), an amplifier circuit (U7), a data acquisition card (U5), and a computer (U6); The M terminal of the Hall voltage sensor (U1) is connected to the 0th terminal of the data acquisition card (U5); the M terminal of the Hall current sensor (U2) is connected to the 1st terminal of the resistor R1, and then connected to the amplifier circuit (U7) The positive input terminal is connected; the output terminal of the amplifier circuit (U7) is connected to the second terminal of the data acquisition card (U5); the output terminal of the data acquisition card (U5) is connected ...
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The invention discloses an alternating current and direct current contactor coil power consumption tester, which comprises a Hall voltage sensor, a Hall current sensor, an amplification circuit, a data collection card and a computer, wherein the M end of the Hall voltage sensor is connected with the 0 end of the data collection card; the M end of the hall current sensor is connected with the firstend of a resistor R1 and is connected with the input end of the amplification circuit; the output end of the amplification circuit is connected with the second end of the data collection card; the output end of the data collection card is connected with the computer through a USB (Universal Serial Bus) data line; and after the computer carries out data analysis on a collected digital signal, parameters, including voltage, current, actuation power consumption, holding power consumption and the like, can be displayed.
Description
technical field [0001] The invention relates to an AC / DC contactor coil power consumption tester. Background technique [0002] The international standard IEC 60947-4-1:2012 (ed3.1) "Low-voltage switchgear and control equipment Part 4-1 Contactors and motor starters - Electromechanical contactors and motor starters" requires testing AC and DC contactors The power consumption of the control circuit is controlled in the pull-in and maintenance stages. The action process of the contactor is dynamic. The current in the pull-in stage is larger than the current in the hold stage, and the ratio can reach 10 times. At present, instruments that can directly measure power consumption include power testers and power analyzers, but if they are directly used to measure the power consumption of AC and DC contactor coils, there will be the following disadvantages: (1) Special power testers can only test static The power consumption value of the contactor, the entire pull-in process of the...
Claims
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IPC IPC(8): G01R21/133
CPCG01R21/133
Inventor林承志李庆杰郑立新魏运明陈金汕
OwnerFUJIAN INSPECTION & RES INST FOR PROD QUALITY