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I am participating in a competition today. I am running each side of the bot(3 motors) with a separate smps. Still if one motor gets stalled, the other 2 barely move. Moreover the stall torque is a fraction of what the motors really deliver.
There's no way the stall torque is a fraction of what the motors can deliver - stall torque is, by definition, the maximum torque the motor can provide (or to be accurate, the torque to be applied to the motor shaft to keep it from turning).
I have six motors on my battle bot, each of which draw 7A when stalled
and a wiper motor of 8A.
I tried to power my bot using two pc smpss(450w) but it does not seem to be enough.
Moreover the motors seem to run at a lower speed. So I am thinking of purchasing a motorcycle battery(14Ah). Would that be enough and is there any cheaper alternative?
200 rpm dc geared motors: 12V Average:3A Stall:7-8A No load:.7AWiper motor: 12VStalled: 8ANo load: 1~2AThey(PSUs) can each supply about 10A at 12V.
A battery won't have that sort of protection, but it's advisable to arrange some, just with a higher trigger point.A circuit to pause eg. 10..50ms when changing direction of rotation will help reducing stall currents as well.
Not using motor drivers:P I control the motors manually.
I bet that he's using an ATX that gets power from a 12V source, like the ones for portable PC's and such...
Sorry. I have been a little busy.. Power source is off board. The bot is controlled by two DPDT(reversing) switches, which get power from three smpss which i took out from junked PCs.