Motor start and stop control circuit diagram

1. Working principle circuit diagram

The circuit diagram shows the control circuit of motor 2. In the figure, SB1 and SB2 are the start and stop control buttons for location A; SB3 and SB4 are the start and stop control buttons for location B. The two sets of buttons jointly control the motor M.

The characteristics of the multi-ground control circuit are: stop buttons are connected in series and start buttons are connected in parallel.

2. Circuit working principle

Start: Press the start button SB2 or SB4 (arbitrary) in A and B → the KM coil is electrically attracted → its normally open auxiliary contact closes and self-locks → its main contact closes and connects the main circuit of the motor → motor M runs.

Stop: Press the stop button SB1 or SB3 in place A and B → the KM coil loses power and releases → its normally open auxiliary self-locking contact disconnects the self-locking circuit → its main contact releases and disconnects the main circuit of the motor → motor M stops operation.