Greetings All: I hope I'm in the right place to be asking for suggestions or insight on how to best setup the project I'm about to describe. I'm not in search of "Free-Energy." I mention this becasue I know how easy it is for inquiries like mine to go off on various tangents and completely miss the purpose of the original questions.
I'm a self-taught fabricator of sorts. Some might call me a chronic tinkerer. I have no problems fabricating out of metal or wood as I have in my home shop a CNC metal mill, a metal lathe among other equipmrnt, but when it comes to anything having to do with electicity or electornics I'm completely out of my element.
My present project involves building a light weight Cross-Country E-Bike trailer for long distance fighing and hunting trips. Building the trailer is easy enough but I want to incorportate a removable onboard charging pod onto this bike trailer in order to be able to run off the bike's primary battery while simaltaneously charging my secondary or spare batter as I ride.
As I stated above, I'm not looking for free energy or any other pie in the sky technology. What I had in mind was to use automobile alternator who's input shaft will be spun by the trailer wheels. Here's my dilema.
In my mind's eye I already know how it will fit into my trailer but What I DON'T KNOW is how to wire it up. My only point of reference is my home made two-panel solar charger which goes from my solar panles to the charge-controller I have mounted on the wall of my shop; then from there to the 12 volt battery. From the 12 volt battery to a small power inverter with two electrical plugs into which I connect my radio or my fan or other small electical appliances.
With this bike trailer Charging Pod I was wanting to use the spining tires of my trailer as the input power to spin the alternator. I'm sure I could figure out how to do this through trial and error but I'm also sure it would be less costly if I just ask someone with the experience in electrical work to help me along or at least give me a clue on how to go about this.
The hub motor on my E-Bike is rated at 500 watts and the battery that powers it is a 48 watt 16 amp output. (if I read my manual correctly) The charger that came with this E-Bike plugs into a standard wall plug. The specs on that charger states the following:
Input: 120 volts-3.0 Amps 60 Hz
Output 54.6 volts 3.0 Amps Also, I should state that the symol for alternating currect. Solid line above with short ------ below the solid line is shown on this Output line.
I've calculated the RPMs on the twenty inch trailer tires I'll be using as they spin a two inch diameter pully on the input shaft of the alternator and I believe that it will produce sufficient RPMs at an average of 15 miles per hour. I can maintain that average rate of speed while riding my E-Bike for quite a long ride.
I'm aware that there is most likely some critical information that I may be leaving out here so if you can tell me what that might be I'll be happy to find that info and get back to you with it. For now I'd like to ask any of you who might be inclined give an elctronically-challenged novice what components I would need to connect together to be able to build this E-Bike Charging Pod; and what sequence of components would you go about using?
I have not selected the alternator as of yet but I do want to utilize the charger that came with this E-Bike. Any help you would be willing to share would be appreciated.