I have a board atm with a single 6374 190kv TB motor on it. I’m running a 12S3P battery pack with 30Q cells.
I’m thinking of adding a second motor to it, but… Right now I have to limit my ESC at 60A from the battery as the pack can’t handle more current. If I add a second motor I will have to limit the ESC’s at 30A each. Right?
Do you think I will notice a difference or will it be the same apart from the added traction? I want some extra power for the steepest hills
I know I should upgrade the battery pack also, but right now I’m on a tight budget as I’m studying for another year.
Right now you are using 60A on the motor and the battery
With two motors you will set 30A on each VESC but you can and should set 60A on each motor, this way you have 120A in the motor total, meaning you will have double the torque
Now to the catch, to limit the battery current to 30A, the VESC wont go above 50% duty cycle, what that means? In the hill that will require each motor to keep at 60A you will climb at half of your top speed for a given battery voltage
If you can’t climb some hill at 60A motor and battery, you will be able to climb it with dual motor
If you can climb a given hill right now, you won’t climb it faster by going dual motor
In the first case you would be torque limited, it doesn’t matter at what speed, your motor at 60A simply doesn’t have enough torque
In the second case you are power limited, and what constrains it is the battery max
Dual motors will give you more stability on full acceleration, you will feel safer and might ride with more confidence, braking two wheels is way more effective than a full brake on one wheel. Acceleration will be more powerful as you are already increasing efficiency on motors by reducing the current and accumulating less heat.
Go for it and report back with your findings, thank us latter