|
I have built model car DC permanent magnet motors for years. Motors are designed on the basis of the current flow and the number of loops of wire or ampere-turns. At low rpm a motor will draw maximum current. Ideally to get the max power from a battery pack switching from low voltage/high current at low rpm to higher voltage/lower current for high motor rpm. Since a battery may not be able produce the initial current demand, a capacitor is designed to store a charge and dump it quickly. If you have several large batteries rather than a myriad of tiny ones, less weight will be taken up with casings and cables. The battery pack for starting a diesel tractor engine is typically four large 12v batteries in a 24v parallel/series harness. If you don't have access to heavy gage wire then using several wires in parallel will share the current load. There are a number of different motor configurations and control methods. The local industrial supply house may have a wealth of information on selecting a motor and control system.
|