Good afternoon, can anyone recommend a low cost motor driver for larger 12v DC motors. I don't think the usual L298N is powerful enough.
How large?
I think the 60hp, 12 volt starter motor for my Dodge diesel pickup truck would be considered large. Sure looks large from underneath!
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Pololu has the best selection.
Be sure to determine the stall current for the motor, and use that as a guide. The motor driver must be able to safely handle it.
2x 33gb 520 motors
Google comes with a city dump of nonsens. Is there a datasheet available?
This is the most I can find.
Rated Voltage: DC12V
No-load Current: 100mA
Working voltage range: 6-12V
No-load speed : 170-350r/min
Total length: 50mm, diameter: 33mm
Weight: 100g
If you own the motor, use your multimeter to measure the winding resistance. Rotate the shaft very slowly by hand, and take the lowest value that you get.
start/stall current in Amperes = (motor power supply voltage)/(winding resistance in Ohms)
Thank you, I'll take a look when I get a chance.
The stall current should be listed on the motor data sheet. If not, one can estimate the stall current. Measure the motor winding resistance. Short the meter leads and measure the lead resistance so that you can subtract lead resistance from the final reading. Take several measurements rotating the motor a bit between readings. Use the lowest reading in the calculation. The estimated stall current is the motor supply voltage divided by the measured resistance (after subtracting lead resistance).
Some motor drivers have current limiting (regulation) circuits.
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