Hello guys!
So i am trying to build something for my thesis project as an electronic engineer but i am struggling to find a way to control a single phase motor (water pump) with an arduino.
Do you guys have a tips or a solution to this problem?
I assume you just wish to switch the motor on/off in response to some control signal
the typical Arduino relay is rated at 10amp resistive load so for an inductive load would be 2 or 3 amps
if you motor was larger than this the relay could drive a contactor of a suitable rating, e.g. recently switching 2.2kW pumps used a contactor with an AC-3 rating of 12amps
what controls the switching on/off of the motor?
My tip is to use google and settle in
arduino single phase motor control
turns up many plausible sites. If using these fora isn't cheating, neither would be the use of google. 
a7
And have a look at pump performance with rpm and pressure head .
Performance of motors rpm/torque , starting properties .
Then work out how to control it - either off /on or speed control or mechanical throttle .
If this is your thesis you need to do the proper research , you can’t do your report just saying “ well I asked someone what to do “, you won’t get many marks .
You have not identified the actual problem you have. Unless your motor is a series wound, or universal AC/DC motor, there is NO speed control possible, only on and off.
Hello mate!
Sorry for not being specific i want to control the speed of the motor so i can control the pressure of the water coming out of the pump as well.
Hello mate!
Sorry for not being specific i am looking to control the speed of the motor using an arduino.
And the type of motor you have is what?
Are you looking for something like a Variable Frequency Drive (VFD) driven by an Arduino?
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