Control circuit for controlling inching, continuous operation and stopping of motor via single button

Abstract

The invention discloses a control circuit for controlling inching, continuous operation and stopping of a motor via a single button. The single button is connected with a cathode of a power supply through a coil of a time relay; a normally closed contact of the time relay is serially connected with a coil of an intermediate relay to form a branch which is parallelly connected to two ends of the coil of the time relay; one end of a non-delay transient contact of the time relay is connected with an anode of the power supply; one end of the non-delay transient contact of the time relay is also connected with the cathode of the power supply through a coil of an AC contactor; a normally closed contact of the immediate relay is serially connected with a first normally open contact of the AC contactor, forming a branch which is parallelly connected to two ends of the non-delay transient contact of the time relay; a second normally open contact of the AC contactor is connected between the power supply which is a three-phase power supply and the motor. The control circuit allows the inching, continuous operation and stopping to be easily operated, is convenient to operate and is simple in circuit structure.

Description

technical field [0001] The invention relates to a control circuit for single-button control of jogging, continuous running and stopping of a motor. Background technique [0002] When the motor is running, some motors will adopt the control method of point operation, and some motors will adopt the control method of long-term operation. The so-called jog control: after the button is pressed by hand, the motor is powered on, and when the hand is released, the motor loses power and stops running. Jog control is mostly used in the occasions such as fast movement of machine tool holders, beams, columns, etc., and tool setting of machine tools. Long-term control: After the button is pressed by hand, the motor is energized to run. When the hand is released, because the contactor is self-locked by the normally open auxiliary contact, the motor is still energized to run, and the motor will lose power only after the stop button is pressed. stop running. However, in the existing cont...

AI Technical Summary

Problems solved by technology

However, in the existing control circuit, although the existing circuit combines the jog and long-term control methods, the circuit structure and operation process are relatively complicated.

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