To convert a 12V alternator to 230V you can do only by 2 ways , 1st : using a converter from 12VDC to 230VAC , 2nd : change the number of wire turns in the alternator , more turns more voltage , however the wire thickness is important because it defines the current output , thinner = less current output , thicker = more current output , the dilema there is that a car alternator have a small size , so you will be limited in current output , you can get probably 4Amps at 230V , then in the middle you should have a magnetic field witch by the number of rotation you will get the frequency of the alternate voltage , this is why some alternators need a specific minimum rotation to start output electricity generation . Now , you can create an electric magnetic field in the inductor (center of generator witch rotates) , feed it with some tension to create a magnetic field , or you can place there permanent magnets witch only loose their magnetic field after 300 years , using this last option you will not need tension to inductor , all you need is to remove all the wiring in the inductor and place your magnets there aligned at same distance between them . More magnets you place in the middle in a short distance between them then less rotation you will need to achieve tension and desired frequency output 50-60Hz (cycles/second) .
hi bro, and you didn't try to press your fingers into the deck, it stays warm for a very long time, you don't need heating in winter.... after Nikola Tesla, people think about how to get electricity and it turns out that all you need is a rosette, a few magnetized ferrite rings and a rotten generator...