speed control using matlab
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Transcript of 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 ?