Download Bidirectional Rotation of an Induction Motor with A Remote

Bidirectional Rotation of an Induction Motor with A Remote
Control Device
Synopsis- short description:
The project is designed to drive an induction motor for the required application in
forward and reverse directions using wireless technology. For example, an exhaust fan can be
used in both the directions to get fresh air in and throw hot air out. This can be used in case of
conventional exhaust a fan that rotates in one direction only.
This proposed system demonstrates a technology to rotate a squril cage induction motor
in both clockwise and counter clockwise direction. It also has the provision to control the
direction of the motor using a TV remote. When a TV remote button is pressed, it sends an IR
signal in RC5 code which is received by an IR receiver called TSOP-1738. The microcontroller
receives the infrared signal from the IR remote, the code of which is identified by the receiver to
operate a set of relays. The relays switch ON/OFF the appropriate relay to power a split phase
induction motor to achieve desired direction by interchanging leading supply phase from the
main winding to the auxiliary winding. Output from the TSOP is fed to a microcontroller of 8051
family which is interfaced to a relay driver IC. Thereafter, the relay switching is done by-stable
mode for a split-phase induction motor to rotate in forward and reverse directions.
Block diagram:
HARDWARE REQUIREMENTS:
SOFTWARE REQUIREMENTS:
8051 series Microcontroller, Crystal, IR Sensor, Relay
Keil Compiler
Driver IC, Relays, Transformer, Diodes, Voltage
Regulator, Capacitors, LED, Resistors, TV Remote.
Language: Embedded ‘C’ or Assembly.
Block diagram explanation:
http://media.edgefxkits.in/media/wysiwyg/BD14.JPG
The block diagram representing the bidirectional rotation of an induction motor with a remote
control device. The complete block diagram is divided into different sections-power supply
section, control section and the output section. The power supply unit consists of the step down
transformer which attenuates the high voltage AC to low voltage AC, the rectifier unit along with
a filter converts this AC voltage to unregulated or pulsating DC voltage signal, the regulator
produces a regulated DC voltage. Some parts of the circuit like the microcontroller are given the
regulated DC signal whereas the other devices are given the unregulated DC supply. The output
from the regulator is fed to the relay driver where two relays are connected to the relay driver IC
to operate the motor in either direction. We are giving IR signals from the IR sensors as an input
to the microcontroller and a T.V remote is used to send the signal to the sensor from some
distance. The direction of the motor is observed by the induction motor in the output section. We
have used split phase induction motor in this project.
Circuit diagram explanation:
The project uses a split phase, single phase induction motor of capacitor run type. The split phase
motors have one of the coils that gets direct AC supply while the other gets the supply through
one capacitor and the motor rotates in one particular direction. While the coils are interchanged,
the motor starts rotating in the other direction. This phase reversal of power is achieved by a pair
of relays namely relay 1 & relay 2. While the neutral of the supply is given directly to the
common point of induction motor windings( main winding and auxiliary winding) the phase is
supplied through either relay 1 (or) relay 2 to change the direct supply situation to main winding
and auxiliary in series with capacitor. While relay 2 is off & Relay 1 is “ON” then the power to
the first winding is given directly from the supply and the power to the second winding is fed
from capacitor. While relay 2 ON and relay 1 is off the power to the main winding is fed through
the capacitor and the auxiliary windings gets direct supply. Such alternative operation of the
relay is achieved by the program from the MC output driving the relay through relay driver IC.
One infrared sensor is used to receive the coded signals from a standard T.V Remote. The output
of the IR sensor is connected to the MC. While button 1 is pressed from the T.V Remote the
logical output from driver IC are such that only one relay is switched “ON” resulting the motor
to run anti clockwise. While 3 is pressed from the remote the logic changes the other relay
operates to make the motor run clockwise. The entire ckt is powered by an inbuilt power supply.
Output video explanation:
http://www.youtube.com/watch?feature=player_embedded&v=f4zmH2IkRQ0
This project is designed to operate the motor in bidirectional rotation i.e. clockwise direction and
anti clockwise direction which is based on microcontroller. When we switch ON the device the
IR sensors will receive signal and the remote is operated through the IR sensor signal .we have
arranged the complete system in such a way that when we supply the power to the IR sensor the
LED glows. The operation of the motor is controlled by a standard T.V remote through IR
signals. When we press a particular number in the remote the motor starts to operate. Suppose we
pressed 1 on the remote the motor rotates in clockwise direction and when we press 2 then the
motor will stop rotating and if we want to rotate the motor in anti clockwise direction then we
have to press the number 3 on remote and when we press 4 on remote the motor will stop
rotating. The complete output is done by using induction motor through relays through relay
driver.
Conclusion:
The project “bidirectional rotation of an induction motor with a remote control device” has been
successfully designed and tested. This project has been developed to rotate an induction motor for
the required application in forward a well as in reverse directions using wireless technology, the
complete operation of this project is based on 8051 microcontroller. This project gave us confidence
and practical knowledge and makes us to learn about good things. This project is a low-cost,
reliable, effective and more efficient system in practice.
Future scope:
In future, it can further be enhanced by controlling the operation of induction motor using
thyristors in place of relays for noise free operation.