Star/Delta 3 phase motor start and protection using Arduino uno

Other Hardware Motors, Mechanics, Power and CNC
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Please help with the project, I need help with coding of Star/Delta 3 phase motor start and protection using Arduino uno. I want use Arduino to control Contractors.

2

An Arduino can control contactors, not replace.

3

My bad,meant to say that.

4

Please show a circuit diagram of your project.

How do you know when to take over?
What protection?

5

Actually I do want to use Arduino instead of contractors by program it to break star connection when time for Delta connection and vice-versa

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not contractors .... contactors

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Hi, @bruce1120
Welcome to the forum.

You will need contactors to do the star/delta switching, the Arduino will control the contactors and I gather you want to monitor motor current and contactor operation.

What voltage and current are you going to be controlling, size of the 3phase motor?

Can you please tell us your electronics, programming, arduino, hardware experience?

Is this a school/college/university project?

Thanks... Tom... :grinning: :+1: :coffee: :australia:

1 Like
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Hi

this is a university Project and i am an Electrical Power Engineering student, so my electronic experience is really that small.
What I want to do, I want to Use Arduino Uno instead of Timer to control the contactors. I want to program it to turn off star and turn on delta (and vise-versa) very fast every selected time(say 0,7s). Motor is a "1.5KW (2.0HP) THREE PHASE MOTOR 6 POLE (1000 RPM) 100 FRAME".

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Hi,
Star-Delta switching is used to get a 3phase motor started and up to speed.

What do you mean by;

How will you go getting 0.7s switching with contactors.

If you are just getting the motor up to speed, then start in Star and switch to Delta when the phase current drops to a level where when switched to Delta it doesn't rise to overload levels.

You can monitor for safety;
The 3 phases, to check for phase drop out.
Phase current to check for overloads.
Motor temperature.

Tom.. :grinning: :+1: :coffee: :australia:

1 Like
10

I think you need to spec this up a bit better .
A timer to switch the contactors is a trivial exercise , often done alternatively , with a centrifugal switch on the motor , to operate at the right speed , not time based . Not a task needing a computer !
Contactors are often used in a co ordinated system with thermal current trip and fuses to protect against faults .

What else is it to do ?

You won’t get code written for you if this is supposed to be a learning process for you , you’ll get help
With specific problems .

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