Hi! I have a powerful motor that draws a lot of current at full load. I also have a power supply that can output enough current and a driver that may be able to handle it, but its current rating is a bit lower than what I think the current draw will be.
So the driver I am using is the IBT-2 / BTS7960 with a max current rating of 43A. My power supply can output ~62A and the motor will be drawing at most 60A and I don't think the motor driver is going to like it.
My idea is to use two drivers, so that each one "controls" one of the two wires of the motor, but the Arduino will control them as if they are one (the logic inputs will be tied together).
So far I have come up with two ways of doing this (please forgive the ugly mspaint "schematics").
Here, you can ignore the connections from the "enable" pins of the driver to the Arduino, in method #2 I just tie them permanently high.
(From now on, I will refer to the first driver's pins as "pin(1)" and the second driver's as "pin(2)")
The RPWM(1), RPWM(2) and LPWM(1), LPWM(2) are tied together, so the motor must have one wire connected to R(1) and R(2) and the other wire to L(1) and L(2) ('R' and 'L' being the outputs of the driver, as noted in the picture).
Now, the enable pins are tied high to avoid clutter, as I will not disable outputs in my code.
Both RPWM and LPWM pins of each driver are tied together and are controlled by a single Arduino pin each, and the outputs R(1), L(1) and R(2), L(2) are connected to each other.
This means that one wire of the motor goes to R(1) and L(1) and the other wire to R(2) and L(2).
In both methods, the downsides and possible risks I can see are that if some wire which was tying the logic inputs together somehow disconnects, one of the shorted-together outputs can become high and the other low, resulting in short circuit / bad day.
That aside, is there any other downside or risk in any of the methods? Personally, I want to go with method #2 because it looks tidier.
The main question, after this wall of text, is whether or not this helps with my initial problem.
Does connecting them like this boost the maximum output current from 43A to 86A?