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PROJECT DESCRIPTION

The main intention of this project is to develop a speed-control system for a BLDC motor by using a closed-loop-control technique.

The speed control of the BLDC motor is very essential in industries as the motor is used in many applications such as drilling, spinning, and also in elevators. This proposed system provides a very precise and effective speed-control system.

The proposed system uses a microcontroller of the 8051 family and a rectified-power supply. A set of IR transmitter and photodiode are 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. A matrix keypad is interfaced to the microcontroller for controlling the speed of the motor.

The speed control of the BLDC motor is archived by varying the duty cycles (PWM Pulses) from the microcontroller according to the program. The microcontroller receives the percentage of duty cycles from the keypad and delivers the desired output to switch the motor driver so as to control the speed of the BLDC motor. The speed sensed by the IR sensor is given to the microcontroller to display it on the LCD display.

In future, the scope of this project would be to make this as a full-fledged fuzzy logic controler of a BLDC motor for industrial applications. It could also be developed as an intelligent cruise control, which is used in modern automobiles these days.

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
  • MOSFET
  • LCD
  • Transformer
  • Voltage Regulator
  • Capacitors
  • Resistors
  • Diodes
  • Keypad
  • Opto-Isolators
  • BLDC Fan
  • IR
  • Photo Diode
Software Requirements
  • Keil compiler
  • Languages: Embedded C or Assembly.
Q & A
Q:  Which microcontroller is used in this project?
A:  8051 family 40 pin microcontroller is used in this project.
Q:  How is the reading taking place?
A:  The reading is done 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.
Q:  What is the role of EEPROM?
A:  EEPROM is used for data restoration or backup even after power interruption.
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