High current DC motor RPM controller circuit.

Thread Starter

transforman

Joined Sep 23, 2018
35
I would like to built a circuit as the tittle says. The motor is going to be a windshield wipers car motor driving from a pc power supply at 12v. It going to be used as a homemade ball mill motor and is going to operate more than 4 days continiously. Any thoughts ?
 
Last edited:

Colin55

Joined Aug 27, 2015
519
You have to know the current at 12v when the motor is not loaded and when it is heavily loaded.
Here is the circuit to add:Over-current DetectorCct.gif
One turn will be about 5 amps. You will have to calibrate the circuit or simply use the 10 amp range on a DMM.
 

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Norfindel

Joined Mar 6, 2008
326
Look for a PWM DC motor controller that can supply the current you need. Those winshield motors tipically use a lot of current.
 

MaxHeadRoom

Joined Jul 18, 2013
19,202
What RPM switching rate are you using?
Normally not a problem for motor control, the FET is voltage operated, unlike Bipolar which is a current operated device.
Essentially a transconductance device.
Max.
 
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