Continuous operation and inching control circuit

Abstract

The invention discloses a continuous operation and inching control circuit. One end of a stopping button is connected with the positive electrode of a power source, and the other end of the stopping button is connected with the negative electrode of the power source through a coil of a time relay. A first normally open contact of an alternating-current contactor is connected with a normally closed contact of the time relay and a coil of an intermediate relay in series to form a branch circuit which is connected to the two ends of the coil of the time relay in parallel, one end of a non-delay instant-on normally open contact of the time relay is connected to the junction of the stopping button and a starting button, and the other end of the non-delay instant-on normally open contact of the time relay is connected with the negative electrode of the power source through a coil of the alternating-current contactor. A normally closed contact of the intermediate relay is connected with a second normally open contact of the alternating-current contactor in series to form a branch circuit which is connected to the two ends of the non-delay instant-on normally open contact of the time relay in parallel. Through the time relay, the intermediate relay and the alternating-current contactor, a motor operates continuously in an inching mode.

Description

technical field [0001] The invention relates to a continuous operation and jog control circuit. 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 control circuit, although the existing circuit combines ...

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.

Images