Need Help regarding 12v DC Motor

[Samad]

HI Friends, I'm New to THis forum. I need your help , i was thinking to build a Solar Powered water pump project. I found a 12v DC Brushless Motor on aliexpress for 45$ i was thinking to replace it with existing 220v AC water pump water may be its 1Hp or .75HP not confirmed.. but you can get the idea by seeing the pictures..

Details of 12v DC Brushless Motor:
RPM = 12v 2400RPM / 24v 4800RPM
Operating Current: Without LOAD 1.5A
Torque 3.5Nm
Coil Diameter: 1.7mm
Here are the Pictures

Replace this Motor against this..

Need your suggestions before investing into it... If we Lower the RPM using Arduino or PWM of 12v DC motor to 1100/900 to something can we get more torque or not?

 

[(*steve*)]

If we Lower the RPM using Arduino or PWM of 12v DC motor to 1100/900 to something can we get more torque or not?

No.

 

[Samad]

guys need your suggestion.. will this Motor make it to PUMP water from well about 100ft Down?

 

[duke37]

No.

The maximum suction is about 30ft, 25 is much better. To do this you will need a foot valve so the pipe is always full of water.

Get a bore hole pump or bilge pump which can be lowered down into the water so that priming will not be a problem. Get one with plenty of head to spare. Use a motor to match your power supply.

 

[Minder]

Not only is the motor unsuitable for this application, they are intended to be ran at much higher rpm's than practical for a pump.
The pump example you show is probably a 3ph 4 pole or even 6 pole induction motor.
M.

 

[Samad]

means Higher the RPM will not Pump the water..??? i was just thinking to retrofit this... because as a lumpsum calculation... 3.8nm Torque or 2400rpm is good to run Pump only... and the picture i have shown is bigger because i have unable to find smaller motor pump... 2nd thing In my country.. Mostly People have retrofit Honda GX160 Gasoline Engine with this REd pump to Pump water from 150Ft below... and the Engine rpm is about 2800rpm... to 3200rpm

 

[duke37]

What is a REd pump?
If your engine runs at 3000rpm, then I suspect that it is driving an alternator to give 50Hz like the mains.

How do the pumps manage to draw from 150ft? The energy must be put in at the bottom of the well.

A centrifugal pump will probably need a power input proportional to the cube of the speed. If the speed is too high the structure could be overloaded and cavitation could occur resulting in rapid deterioration of the impeller.

 

[Minder]

REd = Re-Engineered?
M.

 

[BobK]

And, by the way, 1 HP is 745W, 12V at 1.5A is 36W. So the motor is nowhere near 3/4 HP. If it were 100% efficient it would be 1/20 HP.

Bob