a suitable DC motor driver controller? how do match?

Hi,

Thought to use a fine DC motor, details below, but I don't know how to match a suitable DC motor driver controller to it.
I need to control the speed from an ARDUINO processor, with a supply of DC 12-13V.
Checked with seller the use of one controller, but seller just said "not possible" and he/she does not have any more info! Uuch!

The general question is: How do you match a DC motor driver controller to a DC motor?

I know of several points to be considered:

  • brushless or with brushes
  • suitable voltage
  • suitable amperage
  • torque/RPM as application needs

Note: with DC (only!) the volt + amp gives you 99% estimate to the torque... so you need to select only 2 out of the last 3 points...

Any more considerations?

The DC motor that I thought to use is:
"12V DC Electric Motor 0.65HP at 3500RPM CW"
with brushes, at 13V DC it runs at 3500RPM, and gives 260 ounce/inch torque (== 18.722 kg/cm)

Controllers:
A. not good?
Adafruit DRV8871 (Adafruit DRV8871 DC Motor Driver Breakout Board - 3.6A Max : ID 3190 : $7.50 : Adafruit Industries, Unique & fun DIY electronics and kits):
From 6.5V to 45V motor power voltage + 3.6A max / peak current
B. more suitable?
"VNH5019 Motor Driver Carrier" (Pololu - VNH5019 Motor Driver Carrier)
From 5.5 to 24 V + supply continuous 12 A (30 A peak)
C. Which/What is a suitable DC motor driver control to this DC motor??

Thanks

The Adafruit one cannot handle anything like 3.6A peak, it has no heatsink and fan and
has a resistance of 0.55 ohm - do the math.

0.65HP is 500W or so, that's 40A running and likely around 300 to 500A stall...

Neither controller is anything like remotely capable of driving this motor.

Thank you MarkT!

You are very right!

And I'm a shame :frowning: I lost all sense of proportions... Sorry to trouble you all.

Many thanks