Recent content by zuq

Thanks Pkurse and xxChrisxx @xxChrisxx My background is in electrical, so bare with me please. This is for a kart where say 50Newtons of drag force is opposing the karts movement. In terms of torque at wheels, for a radius of 0.5m say it becomes 25Nm. Now if the motor is directly coupled to...

hi guys Lets say I have a wheel that is driven by a shaft connected straight to a motor. Wheel raidus is 0.0762m while shaft raidus is 8mm. If I know the torque acting on the wheel, say 20Nm , what would be the torque on the shaft? Thanks

Thanks oldengr63. Please see the link below for simulation results. I have uploaded a picture of it on imageshack http://img515.imageshack.us/img515/3706/dcmotorr.jpg First graph shows armature current superimposed on my reference current. Second is the speed of shaft in rads/s and third is...

Thanks oldenr63, my question still remains, why is the motor accelerating so quickly even loaded so heavily?

Hi guys..Thanks for your responses oldengr36.. Yes you are right.I do have the complete mechanical plus electrical model. And I thought about my wording of question a bit later, yes the speed would be negative. I was trying to simplify the scenario to ask if J (inertia) changed with speed...

Hi guys, I have built a simulation model for a permanent magnet DC motor, but I am having trouble accepting the results. dynamic equation states. machine accelerates as long as there is torque imbalance between elctrical and load torque, below. dw/dt = (1/J)*(Telectrical - Tload - Tfriction)...