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TEMPERATURE BASED FAN SPEED CONTROLLER
Prepared by :
Supervisor :
CONTENTS
• Chapter 1: Introduction
• Chapter 2: Literature Review
• Chapter 3: Methodology
• Chapter 4: Result and Discussion
• Chapter 5: Conclusion and Recommendation
INTRODUCTIONCHAPTER ONE
temperature controlled fan is analternative way to deal with thespeed of the motor.
Temperature control is a process inwhich the temperature of an object ismeasured and the passage of heatenergy into or out of the object isadjusted to achieve a desiredtemperature.
Fig:1.1. temperature controlled fan
The idea behind this project is to control the speed of fan using microcontroller based on variation in temperature.
Objectives
Measure the room temperature
Display the current temperature in the LCD
Vary the speed of fan accordingly
Reducing the power consumption
INTRODUCTIONCHAPTER ONE
Literature Review
According to Tito Smailagich, given the highcost of electrical power, replacing aconventional on/off temperature control with aproportional controller can often save energyand money.
Lawrence Berkeley NationalLaboratory in their articles mentionedthat in the manufacturing sector, fansuse about 78.7 billion kilowatt-hoursof energy each year. Thisconsumption represents 15 percent ofthe electricity used by motors.
CHAPTER TWO
Fig:1.1. temperature controlled fan
Methodology
Block diagram
CHAPTER THREE
fig:3.1. temperature based fan speed controller
ThermistorHigh Gain Amplifier
Comparator
Bridge Rectifier
Triac Optocoupler
Increase in
temperature
AC supply
230 V, 50Hz
230 V
AC
Fig:3.1. TEMPERATURE BASED FAN SPEED CONTROLLER
Block diagram
Methodology
Flow Chart
CHAPTER THREE
Fig:3.1. Flow Chart of temperature based fan speed
controller
METHODOLOGYCHAPTER THREE
PRINCIPLE OF OPERATION OF TEMPERATURE BASED FAN SPEED CONTROLLER
It is rated to operate over a -55 degree to +150 degree Celsius temperature range. It has+10.0mV/Celsius linear scale factor. Theoutput of this sensor will be connected toATMEGA-32 Micro-controller ‘s PORT-A.
In this project we are using LM35 series analogtemperature sensor. This is a precision integratedcircuit, whose output voltage is linearlyproportional to the Celsius (Centigrade)temperature.
Fig:3.2. Operation of a Metal Detector
CIRCUIT DIAGRAM
METHODOLOGYCHAPTER THREE
Fig:3.2. Circuit diagram of a temperature based fan speed
controller
CIRCUIT DIAGRAM
METHODOLOGYCHAPTER THREE
Fig:3.2. Circuit diagram of a temperature based fan speed
controller
1. LM35(TEMPERATURE SENSOR)2. ATMEGA32 micro-controller unit3. Brushless variable speed DC Motor [DR-6634-514]4. N-MOSFET (BUK9575-100A)5. Resistors (10k ohm, 1k ohm)6. LM7805 Voltage regulator IC
COMPONENTS
METHODOLOGYCHAPTER THREE
MAJOR COMPONENTS
METHODOLOGYCHAPTER THREE
Fig:3.2. ATMEGA32 micro-
controller unit
Fig:3.2. LM35(TEMPERATURE SENSOR)
2.
Fig:3.2. N-MOSFET (BUK9575-100A)
Design and Construction
METHODOLOGYCHAPTER THREE
Result and discussion
After designing, simulating, assembling, soldering
and testing the circuit, we came to the conclusion
that our circuit of the temperature based fan speed
controller is working satisfactorily.
The construction hardware perfect.
The total project work perfectly and has negligible
amount of unexpected functioning.
CHAPTER FOUR
Results
APPLICATION
Personal computers
Exhaust fans in large hotels
Washing machines
CD and DVD players
Result and discussionCHAPTER FOUR
Disadvantages-(1) It can only be maintained by technical person .
(2) Due to temperature variation, after sometimes it’s efficiency
may be decreased .
Advantages and disadvantages
Result and discussionCHAPTER FOUR
Advantages-(1) Since it is an automated system ,it is programmed effectively so
that no interruptions would stop its functionality.
(2)To monitor the environment, that is not comfortable or possible
to monitor for humans(especially for extended periods of time)
(3) Prevents waste of energy.
Conclusion and Recommendation CHAPTER FIVE
The problem statement is implemented.
Hardware part is halfway implemented.
Through simulations and after running the code in IDE abstract is
verified
As the technology is going on developing day by day, we prefer
things to be done automatically and in the same way our projects
reduces the work to mankind.
Conclusion
Conclusion and Recommendation CHAPTER FIVE
• We can monitor more parameters like humidity, light and at the same
time control them.
•We can send this data to a remote location using mobile or internet.
We can draw graphs of variations in these parameters using computer.
•When temperature exceeds the limit, a call will be dialed to the
respective given number by an automatic Dialer system.
Recommendation
Thank you
Any Queries ? ? ?
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