Does Torque Affect Acceleration in Motors?

[xier]

I am wondering how the torque related to its acceleration in a motor! If I am not mistaken, by book, the angular acceleration increases proportional to the torque. But, I have done on an experiment, when i add torque to the motor, its RPM decreased...Please tell me why! Thank in Adv.

 

[Lsos]

Can you describe what kind of experiment you did?

 

[xier]

Can you describe what kind of experiment you did?

Experiment of Squirrel Cage Motor...experiment on the relationship between load torque with the motor speed...

 

[Lsos]

Wait, so the more load you apply to the engine the more it slows down? I don't know much about squirrel cage motors but that makes perfect sense to me.

There's torque that tries to speed the motor up (driving torque) and torque that tries to slow it down (load). Increasing the driving torque, as you say, increases the angluar acceleration. Howerver, the load works against the driving torque. Increasing the load effectively DECREASES the driving torque...and thus the angular acceleration/ speed.

If I'm talking about something completely outside of what you had in mind, please correct me...