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PROJECT DESCRIPTION

The main intention of this project is to operate a BLDC motor at a particular speed with a predefined voltage . Therefore, the motor remains in an operational state or restarted to operate at the same speed as before by using stored data from an EEPROM.

The speed control of the BLDC motor is very essential in industries as it is important for many applications such as drilling, spinning and elevators systems. This project is enhanced to control the speed of the BLDC motor by varying the duty cycle.

The proposed system uses a microcontroller of the 8051 family and a rectified-power supply.  In this system, the EEPROM memory is interfaced to the microcontroller for storing the information. Opto-coupler is connected to trigger the MOSFET for driving the BLDC motor which is duly interfaced to the microcontroller. The two switches are interfaced to the microcontroller for entering the desired speed of the motor. The 16*2 LCD display is interfaced to the microcontroller for displaying 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 stored in the EEPROM from inbuilt switche commands and delivers the desired output to switch the driver IC in order to control the speed of the DC motor. If the power supply is intetrrupted, the EEPROM retains that information to operate the motor at the same speed as before while the power supply was available.

PROJECT HIGHLIGHTS
PID Speed Control with Non-Volatile Memory.
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
  • LCD
  • Transformer
  • Voltage Regulator
  • Capacitors
  • Resistors
  • Diodes
  • BLDC Fan
  • EEPROM
Software Requirements
  • Keil compiler
  • Languages: Embedded C or Assembly
Q & A
Q:  How does the sensing take place?
A:  Sensing takes 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.
Q:  What is the role of EEPROM?
A:  EEPROM is used for data restoration or backup even after power interruption.
Q:  How can I control the speed?
A:  One can control the speed by push buttons provided in the project.
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