A kind of intelligent AC contactor adaptive breaking control method

A technology of AC contactor and control method, which is applied in the direction of relays, electrical components, circuits, etc., can solve the problems of short total three-phase arcing time, achieve the effect of the shortest arcing time, stabilize the total resistance, and improve the electrical life

Active Publication Date: 2022-07-12
FUZHOU UNIV
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Problems solved by technology

[0003] For single-phase, the most favorable breaking phase is near the current zero point, and the AC contactor is usually of compact design, driven by an electromagnetic operating mechanism, the three-phase contacts are broken at the same time, it is difficult to make the three-phase contacts all It is broken near the current zero point, but there is an optimal breaking phase of the contacts, so that the total arcing time of the three phases is the shortest

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  • A kind of intelligent AC contactor adaptive breaking control method
  • A kind of intelligent AC contactor adaptive breaking control method
  • A kind of intelligent AC contactor adaptive breaking control method

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[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0038] It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components and / ...

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Abstract

The invention relates to an adaptive breaking control method of an intelligent AC contactor, wherein the intelligent AC contactor is composed of three-phase contacts, an intelligent electromagnetic operating mechanism and a current transformer. The three-phase contacts are used for switching the load, the intelligent electromagnetic operating mechanism is used to control the contacts, and the current transformer is used to monitor the current of the contact circuit. During the breaking process of the contactor, the breaking time of the contactor is detected by the current transformer according to the coil current detection in the intelligent electromagnetic operating mechanism, and then the total arcing time of the three-phase contacts is calculated. Under frequent operating conditions, take the shortest total arcing time as the optimization goal, dynamically adjust the delay action time of the breaking process, and continue to find the optimal delay, so that the contactor can automatically adjust to the shortest arcing time under the current load. working status. The invention enables the intelligent contactor to adaptively adjust the working state under different loads, achieves the shortest arcing time, and is beneficial to improve the electrical life.

Description

technical field [0001] The invention relates to the technical field of low-voltage electrical appliances, in particular to an adaptive breaking control method for an intelligent AC contactor. Background technique [0002] The arc in the breaking process of the AC contactor is an important factor affecting the electrical life. Shortening the arcing time and reducing the arcing energy can effectively reduce the contact ablation, which is beneficial to improve the electrical life. Combined with electronic control technology, the delay action time is set according to the disconnection time of the contactor, so that the contacts of the contactor are disconnected at the most favorable phase, forming a phase-selective disconnection control scheme. Phase-selective breaking control can not only be used to shorten the arcing time of the contactor, but also to suppress breaking overvoltage, shorten the breaking time of overload current or short-circuit current, etc. However, the oper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H47/00H01H47/18H01H47/22
CPCH01H47/00H01H47/002H01H47/18H01H47/223H01H2047/006
Inventor 许志红张长坤
Owner FUZHOU UNIV
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