Motor Speed Controller Using Triac

Table of Contents

Simple Ac Motor Speed Control Circuit Using BT136 Triac

This Ac Motor speed controller circuit is working based on the Triac and Diac. You can use household equipment like a drilling machine to control the rotating speed of it.

The speed of the electric motor adjusted by rotating the preset pot on the board. Rotate the preset pot to left side right side to increase the speed and left to decrease the speed.

Also, check Ac motor speed control circuit

This motor speed control circuit diagram contains few components such as:

BT136 Triac
DB3 diac
0.1 uf 400v capacitor
500k pot
10k resistor
Ac input and output connector

The motor speed control board also included in this article. you can able to access this free PCB layout without any cost.

ac motor speed controller pcb — Ac motor speed control board

Working of Ac motor controller

This circuit is working based on the triac of Bt 136. It is having the maximum terminal current is 4A. so you can only use up to 800watts electric equipment to control.

A proper heat sink must be fitted with Bt136 triac. Because the haet should be produced during the working of the motor controller.

Adjusting the preset pot will regulating the input voltage to the triac. so the triac will allow the ac voltage with the controlled manner. This is the main principle of this circuit.