http://electronics.howstuffworks.com/motor.htm - about motors
submitted by uncleD
http://science.howstuffworks.com/electricity5.htm - DC vs. AC
Posted - 01/03/2009 : 15:19:04
here is some more information by polyscient
Motors rated for a lower voltage have thicker windings inside to allow current to pass thru more easily. High voltage motors gain tremendous efficiency by having very thin windings since they can take advantage of the high electrical potential (think high pressure pumping water thru tiny tubes). By allowing very little current (relatively) in the many thin wires, high voltage motors conserve energy to be more efficient.
However, if you run a higher voltage through a motor made for a lower voltage, the thicker windings inside will allow a huge amount of current to flow through the motor, giving an amazing increase in power and battery consumption. On some performance 24V motors, increasing from 24V to 36V can almost double their power output.
posted by 1000WattZappyClassic
If you run a 24 volt motor on 36 volts, you are increasing the voltage around 50%. a 48 volt motor on 60 volts is only a 25% increase. If they are both 500 watts before the increase in voltage, the 24 volt motor will have a higher wattage output after the voltage increase. It would also rev higher but you can gear it lower to have the same top speed as before the increase in voltage and it will all turn into a pure tourqe increase.
submitted by storm
This site shows various motors in a simplified form with some links to more advanced designs, highly recomended reading for anyone wanting to understand how the magic happens.
http://www.animations.physics.unsw.edu. ... otors.html
Speed, Distance, Torque... Pick any 2