speed control using matlab

8/10/2019 speed control using matlab

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PRESENTED BY:

CH SANTOSH KUMAR (08QM1A0208) M SUMAN (08QM1A0231) P PRAVEEN KUMAR (08QM1A0241) P SRIDHAR REDDY (08QM1A0242) P PRATYUSHA (08QM1A0245)

HEAD OF THE DEPARTMENT PROJECT CO-ORDINATOR INTERNAL GUIDE

MR. K.HUSSAIN MR.G.VIJAY KUMAR MS.B.SASI KALA


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ABSTRACT

The purpose of a motor speed control is to take asignal representing the demanded speed and drive themotor at that speed.


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INTRODUCTION The speed of dc motor is directly proportional to the

supply voltage, if we reduce the supply voltage from12V to 6V, the motor will run at half the speed.

As the amount of this time that voltage increasescompare with the amount of time that it is off. Thison-off switching is performed by power MOSFETsspeed is set by PWM.

Here we are using microcontroller applications. Forthis we are usingATMEL16 IC and by using this we aresetting speed and measuring speed. Output can beseen on LCD display


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BLOCK DIAGRAM


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POWER SUPPLY


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AC incoming voltage is 230V 50Hz is step downed to 15v

AC using a step down transformer.

15v rectified using a bridge rectifier and next stage it is

filtered using a smoothing filter to get ripple free DC.

15 volts was applied to regulator LM7812. this12 volts

regulated DC for motor.

LM7812 so/p given to LM7805 Voltage regulator which

gives a constant output voltage of 5V.This 5V is given to microcontroller. And slot sensor and

comparator, LCD display.

POWER SUPPLY DESCRIPTION


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DC MOTOR

The DC motor is electric motor that runs on direct currentelectrically.

DC motor works based on the LORENTZ FORCE.

In DC motor voltage is proportional to speed

ADVANTAGES Low initial cost

High reliability

Simple control of motor speed


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LCD Display interfacing LCD stands for liquid crystal display.

The Liquid Crystal Display (LCD) consumes less power.(typically in the order of microwatts)

There are two major types of LCDs which are: 1. Dynamic-scattering LCDs and

2. Field-effect LCDs

Field-effect LCDs are normally used in such applications

e.g., watches, portable instrumentation etc. Field effect LCDs absorb considerably less power than

the light-scattering type.

On the other hand, light-scattering units are available upto 8 inches in height.


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PIN DIAGRAM OF LCD16 x 2 Char LCD

R1

R2

GND

Vcc

VfRSRWEN

D0 D7

KD0

D7

CK


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Do-D7 Po-P7

RW

RS

EN

P3.5

P3.6

P3.7

ATmega16LCD

LCD to MICRO CONTROLLER


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Photo interrupter

This was contains one led and photo transitor inopposite. In this project , we are using for speedmeasurement of motor. A small wheel attached to

motor and that interrupt photo transistor whenrotating.


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RAM ROM

I/O

PortTimer

Serial

COM

Port

Microcontroller

CPU

A smaller computer

On-chip RAM, ROM, I/O ports...

ExampleMotorolas 6811, Intels 8051, ZilogsZ8 andPIC 16X

AVR atmega8,atmega16.

A single chip

MICRO CONTROLLER


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ATMEGA16 FEATURESHigh-performance, Low-power AVR 8-bit Microcontroller

16K Flash, 1024 Bytes EEPROM, 1K Byte SRAM

Programming Lock for Software Security

Two 8-bit Timer/Counters, One 16-bit Timer/CounterFour PWM Channels

8-channel, 10-bit ADC

Programmable Serial USART

Master/Slave SPI Serial InterfaceOn-chip Analog Comparator


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ATMEGA 16 PIN DIAGRAM


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CIRCUIT DIAGRAM


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FLOW CHART


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Applications ROBOTIC CONTROLS.

SWING MACHINES.

ELECTRONIC BIKES.

WINDING MACHINES.

DC OPERATED DRILL MACHINES.

CNC MACHINES.

MOBILE AIR CONDITION FANS.

TOYS.

ELCTRONIC DOOR CONTROLLERS.

ELECTRONIC CHAIRS(beauty parlor etc.)


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CONCLUSIONWe have achieved the required speed . And also we

display this on LCD display.

Our aim of this project, we have achieved the speedcontrol of dc motor.


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THANK YOU


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Queries ?

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speed control using matlab