Can I upgrade a cheaper motor controller to handle more current? Answered
I know the answer to "Can I do [blank]?" is always "Yes!... with enough time and effort." I'm looking more for the economical breakdown of how to figure if it's worth the time and effort to do a mod, or if it's "better" to just buy off-the-shelf.
I have a 250W motor controller for a 250W motor on a small scooter. I have recently come upon a 500W motor, same voltage and also PMDC just like the 250W. Now, I'm assuming that the main difference between the two is probably the number/quality of the transistors being used to control current. So I'm thinking it's reasonable that if I were to just "double" the transistors, I could get "double" the current. (P=V*I and all)
Of course, make sure heatsink can handle dissipations, might run into current limiting if there's some current sensing happening, etc... but in short, is my train of thought correct or at least headed in the right direction? I find there's a bit of a gap between "Introduction to PWM/ESCs 101!" and "DIY Motor Controllers from SCRATCH!" that isn't very well documented. I think I'm fitting in right there.