High Power Motor Control (Bidirectional, Variable Speed)

Other Hardware General Electronics
1

Hi all!
So I've got a simple shield that uses two pins out with the aim of controlling a motor.
The first pin is PWM and gives 0-255 to control the motor speed, 0 being off and 255 being max speed.
The second pin is digital and gives 0/1 to swap between clockwise and anti-clockwise.

With these I want to control a higher power motor so I know I need some "translational" electronics between.

Now, I've personally used both H-Bridges and TIP120's in separate instances to control the direction and speed respectively. However here I don't see how the two could work together.
Any advice on what I need to get and how to wire it up is greatly appreciated :slight_smile:

2

With these I want to control a higher power motor

How much voltage & current?

I assume the "higher power motor" is also a DC motor?

3

12V 11A currently, could change as required. Definitely not a "logic" level motor.

4

and very definitely not "High Voltage"

5

I was distracted when typing the heading, high power would be more accurate. Nevertheless, the issue remains. Do you have anything constructive to say?

6

A TIP120 will not handle 11A - You need much bigger devices .

Or buy a much bigger H Bridge from polulu, adafruit etc.

Allan

7

Definitely discrete MOSFET H-bridge is the way to go, such as the VNH3SP30 ones from Pololu.
When you say 11A is that running current or stall current?