Thyristor Controlled Power for Induction Motor

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  • Thyristor Controlled Power for Induction Motor

Thyristor Controlled Power for Induction Motor

Product Description

The project is designed to control AC power to a load by using firing angle control of thyristor. Efficiency of such power control is very high compared to any other method.

The project uses zero crossing point of the waveform which is detected by a comparator whose output is then fed to the microcontroller. The microcontroller provides required delayed triggering control to a pair of SCRs through opto isolator interface.

Finally the power is applied to the load through the SCRs in series. This project uses a microcontroller from 8051 family which is interfaced through a push button switch for increasing or decreasing the AC power to the load.

A lamp is used in place of an induction motor whose varying intensity demonstrates the varying power to the motor. The varying power results in variation in speed of the motor.

The project can be further enhanced by using direct 230 volt supply instead of 12 volt AC to the bridge rectifier for achieving higher voltage control for charging number of batteries in series.

Project Highlights

  • Easy to use, Self-explanatory kit.
  • All-inclusive solution kit.
  • Extensive audio-visuals available.
  • Branding-free material.
  • Pre-programmed Microcontroller.
  • Load Switch @ Zero Voltage.
  • Call/mail for Tech Support from 10 am - 7 pm.
  • Can be Customized for Arduino, Raspberry Pi, PIC

Block Diagram

Hardware Requirements

  • 8051 series Microcontroller
  • LM358
  • Opto isolators
  • SCRs
  • Push Button
  • Transformer
  • Diodes
  • Voltage Regulator
  • Resistors
  • Capacitors
  • Crystal
  • Lamp

Software Requirements

  • Keil Complier
  • Languages: Embedded C or Assembly

User Reviews

electronicshub

"I live in Hyderabad, a place that is known for engineering colleges. Went with frnd and bought a set from Ameerpet(tht hs rdymade stuff like this) and it failed just b4 viva. Thats when we got this thx to a senior who is sorta like a geek.. and let me tell u.. Its one reason why me and my frnds got thru the final sem. Works great and is useful too later.. "

Ravi Teja
Order No: HYF1290
electronicshub

"A must-buy. It helped me practice in real time and learn how to make a project by looking at an actual workable unit. (fyi - you get a fully built unit and another full set of components to build another by yourself) so it was great value for us. We shared the costs by 3 (our team for the project) but i got to keep my unit as the other two kept the original. Showed it for my on-campus and got thru too becuase it not just looked neat and profesionally bt worked great later. (still have it in my room, now working with GE in Bangalore) "

Anusha
Order No: BLR2933
electronicshub

"We have used it for our institution - it is available in lab and has been good for explaining various models in live during class. Strongly suggest every college dept to have it for labs as it is working well - even with regular use at lab for more than 1 year. Note:We got the unit complementarity before launch in 2014 and have later purchased few batches. The team behind it is professional and know what electronics students need and i am writing this review on their request on 13/05/2016"

Mr. Ramesh Kumar Jha
Order No: BQF3698

Q&A

Q:  Which microcontroller is used in this project?

A:  A 40 pin 8051 microcontroller is used in this project.

Q:  What is thyristor AC power control?

A:  By using push button provided, we can control the power to the load. This can also be done with Bluetooth.

Q:  Can I place motor instead of lamp?

A:  Yes motor with rating, up to ¼HP 230V AC, can be placed instead on lamp.

Q:  How is the bulb intensity varied?

A:  The bulb intensity can be varied by delaying the firing angle of Thyristor, so as to control its triggering.

Q:  What are the thyristors used?

A:  2 back to back connected SCRs are used as thyristors.

Q:  Why SCRs are preferred instead of relays?

A:  SCRs are accurate timing devices compared to relays.

Q:  What is the formula for calculating smoothing capacitor value?

A:  There is some approximated formula .Peak to peak ripple voltage = Load current in amps / (2*line frequency in hertz *capacitance in farads). But as rule of thumb for 1 A current 1000uF is best. Thus it is load dependent.

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