Control circuit for cold-state operation of soft starter after starting of motor

By designing a control circuit for the soft starter to operate in a cold state after the motor starts, disconnecting the bypass contactor to assist normally closed point and implementing the self-locking function, the aging problem caused by the long-term live operation of the soft start control device is solved, and the service life of the equipment is extended.

CN222638417UActive Publication Date: 2025-03-18GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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Patent Information

Application Number
CN202421046453.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-14
Publication Date
2025-03-18
Estimated Expiration
2034-05-14

AI Technical Summary

Technical Problem

The soft start control device operates with a long-term live operation in industrial production, which leads to accelerate aging of soft start electronic components and shortens the service life of soft start.

Method used

A control circuit for the soft starter cold operation after the motor is started is designed. The soft starter control voltage is cut off by assisting the disconnection of the normally closed point through the bypass contactor, and the self-locking function is realized through the normally open auxiliary point of the bypass contactor, keeping the bypass contactor coil continues to be energized, so that the soft starter control board is in a cold state without electricity.

Benefits of technology

It solves the problem of soft starter malfunction and shutdown during equipment operation and long-term aging of live components, extending the service life of soft start.

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Abstract

The utility model discloses a control circuit for cold-state operation of a soft starter after a motor is started, and relates to the technical field of electrical control. According to the utility model, through improvement of a traditional soft start control circuit, after a contactor bypass in a starting stage of the soft starter is completed, the soft starter can control voltage to be cut off through disconnection of a bypass contactor auxiliary normally-closed point, and in addition, a self-locking function is realized through a bypass contactor normally-open auxiliary point, so that a bypass contactor coil is kept to be electrified continuously; the control panel of the soft starter is in a cold-state no-power state, so that the problems that the soft starter is shut down due to malfunction and electrified elements are aged for a long time in the equipment operation process are solved.
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