My example here will be taking a motor from 12V to 18V... If you raise the voltage, current will go up, as resistance of the windings is not changing. Because current increased, so too will torque, which is proportional to current. As torque goes up, speed goes up (mechanical load on the motor is unchanged). As the speed increases, more lines of magnetic flux are cut by the windings, producing a counterelectromotive force (CEMF) that opposes the original applied (18V) voltage, reducing current to a new (higher than original, but lower than the surge from the increased voltage) value. The motor's precise speed will oscillate a little until these competing forces work themselves out. The end result is that the motor will be turning faster for the same load, at a higher than original current value. Power has gone up due to the increase in voltage and current (reflected in work done; the tank moves faster than before).
Sound reasonable? -- Clark in Georgia, Commissar of the Red Banner Southern Fleet "We will pass through the American patrols, past their sonar nets, and lay off their largest city, and listen to their rock and roll... while we conduct missile drills." --~--~---------~--~----~------------~-------~--~----~ You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] Visit the group at http://groups.google.com/group/rctankcombat -~----------~----~----~----~------~----~------~--~---
