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basically what i am trying to figure out is the basic principles and equations for a regeneritive motor system

i have decided the simplest solution would be the following

engine -> generator -> batteries <-> motor

so engine to create power for the generator/alternator what have you, that charges the batteries should they become low, and the batteries power the motor to go in one direction but also acts as a generator (as i have heard this is simply a case of the magnets will force the current the opposite way??)

there are no parameters but im thinking a 48 volt system would be best as i figure it lowers the current needed,

and i would like around 40Kilowatts (KW) output from the motor (also for efficentcy reasons and longevity i am inclined to use a BrushLess DC motor) apparantly a mirco controller will be needed to do this (something i also know nothing about)

basically the things that need to be calulated are the engine power, alternator output (Amps, volts watts) (will a regulator or rectifier be needed) batteries how big will the bank off batteries i need be (amp hours, amps volts watts) i would like to do about an hour on just batteries from fully charged.and finally what sort of drive motor will i be looking at (will a BLDC motorwork the way i want and what consupmtion will it have ect)

i know this is a huge vague question but i really am intrested in learning and since my knowledge is so vague google is not being much help :'(

thanks in advance you awesome people :D