PC Based motor speed control system with dual driver
Published Wednesday 5 October 2011 by gk inPC Based motor speed control system with dual driver
OBJECTIVE:
Aim of the project is to control the speed of the DC motor through computer by using micro controller.
PWM is a common technique for speed control; a DC motor's speed is determined by how much current is flowing through it. Intuitively, for supply low DC current, the motor will spin slowly. It will spin more quickly with a higher current.
The duty cycle of PWM pulse can be varied by microcontroller while receiving the control signal from PC. Pulse Width Modulation used two discrete values of current (none and full) in pulses that average to the desired current for DC motor. The longer the pulse, more average current flows through the motor, and the faster it goes.
One potential application of automatic motor speed is regulating room temperature. PC can sense the current temperature (using an analog-to-digital converter) and then automatically increase/decrease the fan's speed accordingly. By using PC it is no longer burdened to manually adjust the fan's speed as the room heats or cools.
This project is implemented using PC with RS232 cable, PIC micro-controller, and Type D chopper circuit.
FIRMWARE DEVELOPMENT TOOLS:
1. Development tool - Mplab
2. Compiler - HI-Tech PIC C
3. Programmer - PIC Flash
APPLICATIONS:
1. In Home appliances
2. Sugar factory
3. Power plants
4. Textile mills
5. Paper mills
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