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PROJECT DESCRIPTION

The main intention of this project is to develop a speed-control system for BLDC motor by applying varrying voltages to increase and decrease the speed as per the requirement and to display the corresponding speed using an IR sensor mechanism.

The speed control of a DC motor is very essential in industries and also in many applications such as drilling, spinning, elevators, etc. So, this project is enhanced to control the speed of the BLDC motor by varying duty cycles of the power fed to it.

The proposed system uses a microcontroller of the 8051 family and a rectified power supply.A set of IR transmitter and photodiode is connected to the microcontroller for counting the number of rotations per minute of the DC motor as a speed sensor. Opto-coupler is connected to trigger the MOSFET for driving the BLDC motor which is duly interfaced to the microcontroller. Two switches are interfaced to the microcontroller for controlling the speed.

The speed control of the DC motor is achieved by varying the duty cycles (PWM Pulses) from the microcontroller as per the program. The microcontroller receives the percentage of duty cycles from the switches and delivers the desired output to switch the driver IC to control the speed of the DC motor. The speed sensed by the IR sensor is given to the microcontroller to display it on the LCD display.

PROJECT HIGHLIGHTS
DC Motor Operation @ Desired Speed.
Call/mail for Tech Support from 10 am - 7 pm IST.
Easy to use, Self-explanatory kit.
All-inclusive solution kit.
Extensive audio-visuals available.
Branding-free material.
Pre-programmed Microcontroller.
BLOCK DIAGRAM
Hardware Requirements
  • 8051 series Microcontroller
  • Level Shifter IC
  • GSM modem
  • LCD
  • LED
  • Crystal
  • Relay driver IC
  • Resistors
  • Capacitors
  • Diodes
  • Transformer
  • Voltage Regulator
  • Opto Isolator
  • Digital Energy Meter
  • Lamp
Software Requirements
  • Keil compiler
  • Language: Embedded C or Assembly
Q & A
Q:  How is the speed sensing taking place?
A:  Speed sensing is taking place by using IR sensor reflection arrangement.
Q:  Can I use bigger stepper/ induction motor to sense the speed?
A:  Yes any motor with reflecting surface from shaft can be used to sense the speed.
Q:  What is the role of EEPROM?
A:  EEPROM is used for data restoration or backup
Q:  How can I control the speed?
A:  One can control the speed using the push buttons provided in the project.
READ WHAT OTHERS HAVE SAID
Average Rating
 5/5
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Showing 1 of 1 reviews
Mihaescucatalin, Romania on 19th September, 2014, 06:37 PM

Thanks for your support I was facing problem with the output. Now it is working absolutely fine.

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