# Power Supply to Brushless/Step Motor

I'm going to buy a brushless motor (nema 17) model 42BLF02:

And 500W Brushless Motor Controller with Hall Sensor:

According to the datasheet it works with 24v, rated current of 3.4A, but its peak current is 10.2A.

I will also have 3 step motors, model 17HS4401.

The Rated Current is 1.7A.

My question is what ideal power supply to use for all 4 motors.

Are you looking for a plug-in power supply?
Or batteries?

vinceherman:
Are you looking for a plug-in power supply?
Or batteries?

Sorry @vinceherman, I forgot to say. I need a plug-in power supply.

Thanks

I don't know anything about the brushless motor but if you need 24v DC for it then you can also use that for the stepper motor assuming you have a specialized stepper motor driver with the ability to limit the current in the step motor.

Better to have too many amps available than too few.

Robin2:
I don't know anything about the brushless motor but if you need 24v DC for it then you can also use that for the stepper motor assuming you have a specialized stepper motor driver with the ability to limit the current in the step motor.

Better to have too many amps available than too few.

The 17HS4401 motors work with 8v~20v, I plan to use a step down to use a 24v power supply.

With basic math, all 4 motors need:

3 * 1.7A = 5.1 (step motors)
3.4A (brushless)

A power supply of 10A would have left some amps. But as I have never worked with brushless motor, I do not know if I need to be prepared for the current peak (10.2A)

Vitali-M:
The 17HS4401 motors work with 8v~20v,

Where did you get that idea. Stepper motors are not governed by voltage, only by current. 24v should be no problem unless the datasheet explicitly says so - I can't see it, but it is a long document and I have not read all of it.

The stepper motors are described as 1.7amps and 1.5 ohms. That means about 1.7 * 1.7 * 1.5 = 4.3 watts per coil or about 9 watts per motor or 30 watts for 3 motors. At 24v 30 watts requires about 1.25 amps - say 2 amps to give a margin for error.

I leave the brushless motor entirely in your hands.

...R