Re: Team Update #11
Due to the nature of the circuit there is a continuous switching in it, which has a DC transient characteristic repeating every time the brushes leave one rotor coil and get to the next one. The 3.9 µH adds to the rotor inductance and limits the transient current running through the motor. It also limits the current through the motor considering its resistance gets in series with the rotor's resistance. The presence of the capacitor in parallel with the rotor limits the noise due to the switching.
Replacing the inductor with a simple piece of wire , or an inductor with less than 3.9 µH, will allow a higher current through the rotor, which will increase the torque providing an advantage over competitors running with motors which have not been modified at all.
The motor expected life will be reduced with smaller inductors, or without inductor at all.
Hugo J. Salom, P.E.
Engineering Lead Mentor - Team 3337
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