Question on Powering a 12V DC Motor

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geronimo993

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Hello,
I am a little confused on how to control the speed and power a brushed 12V DC motor for a project. If I have a speed controller (brand: Talon) and an arduino (Uno), I can control the speed. But I would still need a way to drive the motor, right? I believe I could do this with a motor driver, or with a transistor. Is this correct?

Some guidance would be much appreciated!
 

It depends upon the the output current capability of the speed controller. You need a motor driver that can handle the current of your motor. A power transistor may be adequate for that.
 


Hi geronimo993

It depends on the required voltage and current of your motor . A mosfet or perhaps a darlington pair can suit your aim . if you need more guidance , then deliver more information .

Best Wishes
Goldsmith
 

Hello again,

More guidance would be great!
The free current for the motor is 2.7 Amps, the stall current is 133 Amps. It's voltage will be 12V DC. The free load RPM is 5300.
The speed controller can provide a continuous current of 60 Amps, and a peak current of 100 Amps. The input voltage is 6-28V DC.

Essentially for my project (I've never done anything like this before), I want to be able to set the RPM of the motor and for how long it will run.
Would the Darlington pair be ideal in this case then?
 


Hi again
Of course darlington pair doesn't seem fine in this case . i highly suggest you using mosfet . For instance using four IRFZ44 in parallel together or perhaps using a high current mosfet . IGBTs are good too .

Best Wishes
Goldsmith
 

Okay, great! Thank you very much for your help!
Would you mind telling me why the darlington pair does not seem fine in this case though? Is it because it would not provide enough current?
 

Would you mind telling me why the darlington pair does not seem fine in this case though? Is it because it would not provide enough current?
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Hi again
Because you'll need more driving current in compare with Mosfet or IGBT . and because it's dissipation is more and .... .

Best Wishes
Goldsmith
 

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