Hi, I am using 2 motors 19:1 Metal Gearmotor 37Dx52L mm with 64 CPR Encoder for my balancing robot.
I recently noticed that 1 of my Mosfets IRFZ46N (part of a h bridge which feeds both motors connected in parallel to it) recently began to heat very quickly after mostors started working.
So i feed each motor independently and realized that one of the motors was causing the overheating. In fact after realizing this I noticed that this motor presents a considerable resistance to movement. unlike the other.
I tried oiling the shaft, but nothing. I have to add that it seems this was a problem which gradually increased in time (even if connected in parallel they didnt exactly behave the same).
I am out of ideas, any suggestion you could provide me will be more than welcome.