how to limit the current in a DC motor circuit?

Thread Starter


Joined Oct 17, 2008
Hi guys!
I need to use a circuit element(current limiter) between power source and DC motor circuit which limits the current at a specific value when it increase too much. For example, when it reaches 1 A it should stay at that value even if motor sensors want more current to accelerate the motor..Under 1 A current limiter should just allow that current without any changes. Since my dc motor's resistance changes with the speed of it, my current limiter should be designed independently from the resistance value of circuit..

And my internship supervisor doesn't want me to use mechanical circuit elements (switches, relays, fuses). I was searching about solutions with semiconductor relays and fault current limiters I've found some stuff but it seemed complicated to me. Anyway i'm very new to electronics since i'm not even a sophomore..
I was wondering if you guys have any idea about what i can use to limit this current without using any mechanical parts..