Motor start stop control circuit diagram (1)

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 of ground a; Sb3 and Sb4 are the start and stop control buttons of area B, and the two groups of buttons jointly control motor M.

The multi ground control circuit is characterized by: stop button in series and start button in parallel.

2. Working principle of circuit

Start up:Press the start button SB2 or Sb4 in both places (at any time) → the KM coil is powered on and closed → its normally open auxiliary contact is closed and self-locking → its main contact is closed and connected with the main circuit of the motor → motor M operates.

stop it:Press the stop button SB1 or Sb3 (at any time) between Party A and Party B → the power loss release of KM coil → the normally open auxiliary self-locking contact disconnects the self-locking circuit → the release of the main contact disconnects the main circuit of the motor → the motor M stops running.

Motor start stop control circuit diagram (2)

Motor start stop control circuit diagram (3)

Start stop circuit diagram_ Wiring diagram of start stop button: FR — thermal relay, sb 1 — inching stop switch, SB2 — inching start on / off km — contactor coil km — Contactor normally open contact


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