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PROJECT DESCRIPTION

This project is adapted to drive an induction motor for the obligatory application in forward and reverse directions using wireless technology. For an example, an exhaust fan can be used in both the directions to allow fresh air in and throw hot air out. This can be implemented in case of a conventional exhaust – a fan that rotates in one direction only.

This project demonstrates a technology to rotate a squirrel cage induction motor in both clockwise and anti-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.TSOP17 – series are miniaturized receivers for infrared remote control systems. PIN diode and preamplifier are assembled on lead frame – the epoxy package is designed as IR filter.


The demodulated output signal can directly be decoded by a microprocessor. The TSOP17.is the standard IR remote control receiver series that support all major transmission codes. Output from the TSOP, are fed to a microcontroller of 8051 family interfaced to a relay driver IC.

Thereafter, the relay switching is done in by-stable mode for any split-phase induction motor to make it rotate in forward and reverse directions.In future, it can further be enhanced by controlling the operation of induction motor using thyristors in place of relays for noise free operation.

Note: An induction motor is required to be used to observe the output of the project. Motor is not supplied along with the kit. However, it can be purchased on extra cost.

PROJECT HIGHLIGHTS
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
  • Crystal
  • IR Sensor
  • Relay Driver IC
  • Relays
  • Transformer
  • Diodes
  • Voltage Regulator
  • Capacitors
  • LED
  • Resistors
  • TV Remote
Software Requirements
  • Keil Compiler
  • Language: Embedded ā€˜Cā€™ or Assembly
Q & A
Q:  Which microcontroller is used in this project?
A:  A 40 pin microcontroller from 8051 family is used in this project.
Q:  Why bidirectional rotation of induction motor is required?
A:  Bidirectional rotation of induction motor is required to use the fan both in normal mode as well as in exhaust mode. .
Q:  How to connect the motor in this project?
A:  Operation procedure is provided with the kit,for connecting the motor.
Q:  What is the role of microcontroller?
A:  The microcontroller is programmed so as to change the direction of induction motor, with respect to the input.
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