A method for adaptive action control of AC contactor

An AC contactor, action control technology, applied in the direction of AC motor acceleration/deceleration control, motor control, control system, etc., can solve the problem of voltage sag immunity mismatch, achieve engineering practicability, and ensure production continuity , the economic effect is significant

Active Publication Date: 2022-03-29
SICHUAN UNIV
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Problems solved by technology

[0006] In order to solve the problem of the voltage sag immunity mismatch between the existing motor and the AC contactor, the present invention proposes a control method for realizing the adaptive action of the AC contactor, which can give full play to the fault ride-through capability of the motor load itself , to minimize unnecessary unplanned interruptions to the production process

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  • A method for adaptive action control of AC contactor
  • A method for adaptive action control of AC contactor
  • A method for adaptive action control of AC contactor

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Embodiment Construction

[0056] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0057] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art wi...

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Abstract

The invention discloses an AC contactor self-adaptive action control method, which relates to the technical field of electrical intelligent control. Realize adaptive action; combine offline calculation with online analysis, so that the AC contactor can respond quickly under voltage sags, which can not only ensure the continuity of production under most voltage sags, but also ensure the AC contactor under severe voltage sags The contactor can jump off the motor in time to ensure the safe operation of the motor; the double-cage rotor model of the motor is adopted, which considers the change of rotor parameters with the speed, and can well characterize the dynamic behavior of the induction motor during stall and acceleration; In the self-adaptive control process, the original structure and function of the AC contactor are not destroyed, and only a simple capacitive energy storage delay element needs to be added. The economic effect is remarkable and it has engineering practicability.

Description

technical field [0001] The invention relates to the technical field of electrical intelligent control, in particular to an adaptive action control method for an AC contactor. Background technique [0002] With the continuous development of modern industry, the voltage sag-sensitive equipment in the power system is gradually increasing, which reduces the anti-disturbance ability of the production process and makes the economic losses and safety risks caused by voltage sag increasingly prominent. AC contactors are widely used in the control of motors, lighting, and electric heating loads, but they are also very typical voltage sag sensitive devices. In recent years, incidents of motor stall and even production process interruption caused by AC contactor tripping have occurred from time to time, which have brought huge losses to continuous production industries such as papermaking, metallurgy, and chemical industry. In fact, since the motor itself has a certain inertia, it can...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P23/14H02P23/20H02P29/024H02P29/028H02P29/032H02H7/08
CPCH02P23/14H02P23/20H02P29/024H02P29/028H02P29/032H02H7/08
Inventor 王杨姚凌翔肖先勇张文海郑子萱
Owner SICHUAN UNIV
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