My DC motor stopped turning fast

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1

Greetings!

I am working on a car like robot that has two 4.8V DC motors, one on each side (Differential drive) , the two motors were working perfectly fine but suddenly one of them stopped turning fast as it used to be. i measured the voltage across the motor and to my surprise the voltage was even higher than the other motor that is still working. I am using L298 H bridge as a motor controller.

in addition, the motor does not even start until i give it a push by hand.

any help would be really appreciable.

2

What were you using for

What were you using for power when the motor started do act funny? Is the motor attached to anything? It could be a number of things, from worn brushes, to hair wrapped up in the gearbox. Pics of the setup might help someone find your problem.

3

here comes more

here comes more informations:

i am using a toy car and for test purposes:

i used a power source of 3.3 v and recorded the current:

motor that works properly:

starting current = 324 mA

operation current = 170 mA

stalling current = 1,03 A

motor that doesn’ work properly:

operation current: 112 mA

zero starting current ( as the motor doesn’t start unill i give it a push) and also zero stalling current

4

Yeah, I’d have to go with

Yeah, I’d have to go with Max. Sounds like the internals of the motor have given up on ya.