Embedded Soft Start of DC Motors Using IGBT with Over Load Protection

Abstract

This project is developed for the users to protect a DC motor. It consists of a temperature sensor, microcontroller unit and LCD display. The microcontroller has 28 pins in which we can use 22 pins as I/O operations. It consists of four ports called PortA, PortB, PortC and PortD. It has inbuilt ADC and it supports USART. The temperature sensor senses the temperature of the motor in run time. Temperature sensor sends signal to the microcontroller through ADC. The microcontroller analyses the signal and sends signal to the driver section. The driver section drives the relays to control the operation of the motor. And also sends signal to the alarm. If the temperature exceeds the particular limit the alarm rings and also the motor operation will be stopped automatically. The temperature will be displayed in the LCD display. This project is cheap and best. Since this uses microcontroller, the operations will be very accurate. This project uses assembly language as Microcontroller language. PIC16F73 is used as Microcontroller.

Existing System

Proposed System

Architecture

BLOCK DIAGRAM