Device and method for dynamic testing of contact pressure of contact terminal of alternating-current contactor

Abstract

The invention discloses a device for dynamic testing of the contact pressure of a contact terminal of an alternating-current contactor. The device for dynamic testing of the contact pressure of the contact terminal of the alternating-current contactor comprises an upper computer and a lower computer, wherein an industrial personal computer serves as the upper computer, the lower computer comprises a contact terminal contact pressure sensor, a charge amplifier, a signal conditioning circuit, a high-speed data acquisition card and a closing phase angle controller, and the alternating-current contactor is a testing sample. The device can directly reflect the dynamic changing process of the contact pressure of the contact terminal, reflect the bouncing condition of the contact terminal more visually, and solve the problem of asynchronization of two contacts of the same touch bridge during closing. Contact pressure signals of the contact terminal can provide new data for the study of the dynamic parameters, such as the optimal closing phase angle, of the alternating-current contactor in the future, the intensive study of the relations between the contact pressure of the contact terminal and other parameters such as the contact resistance and the contact vibration at the moment of contact terminal contacting, and the optimization design of the alternating-current contactor.

Description

Technical field: [0001] The invention relates to a testing method and a device for dynamic characteristic parameters in the field of low-voltage electrical appliances, in particular to a testing method and a device for testing a contact pressure dynamic signal of an AC contactor. Background technique: [0002] AC contactor is an automatic electromagnetic device with large production volume and wide application. The mechanical parameters of AC contactor contacts mainly include contact opening distance, overtravel, contact pressure and asynchrony of main contacts. The contact pressure of the contact is divided into the initial pressure and the final pressure of the contact. It is one of the important contact parameters and has a direct impact on the performance of the electrical appliance. In order to deeply study the relationship between the contact pressure of the contact at the instant of contact and other parameters such as contact resistance and vibration, it is necessar...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the existing technology cannot accurately obtain the dynamic signal of the contact pressure of the AC contactor, the present invention provides a device and a testing method for testing the dynamic signal of the contact pressure of the AC contactor using PVDF piezoelectric film

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