Recent content by RaySuave

You are correct the gearing indeed does not have any effect on HP, my over sight. This is exactly the reason my intent was not to convince anybody of anything because it has just been me looking at what I have done so far and I currently lack the benefits of a 2nd or 3rd person to point out...

If the alternator is spinning at around 5,000 RPM for the rated output, and what is driving it is spinning at 10,000 RPM, how would the alternator output be 7.35kW?

I agree, which is why I plan to have an alternator gear/pulley ratio of 2:1 so the car will only have to experience an extra load of 10 or 11 HP. I mention this ratio in the screen shot.

Thanks for the input but the purpose of this thread was not to convince anybody of anything or ask for advice on range extending methods, it was only to gain advice on how an additional load to the system would effect battery range and thats it. I received an answer for this then posted results...

Im just attempting to extend range. The calculator Im making is not finished as I dont have all the information I need to account for all the losses. I posted it primarily for just an example for other people who are working on range extenders. If I manage to extend range even 10%, I would be...

Range Extender Calculator The screen shots below are from a website I'm developing for a range extender design. The calculator is my attempt to account for as many factors as reasonably possible to estimate some realistic expectations of my device. (deleted screen shots, will post again once...

Your looking to match the generator speed to the motor speed, EV motors spin pretty fast, the MS has a 9.73:1 motor to drive shaft ratio. Check generator specs to see what their RPM limits are before bearings start to fail.

I dont believe you can charge a battery and discharge it to feed the vehicle motor at the same time....not yet at least. Also keep in mind, the most common generators/alternators need to spin around 2,000 to 3,000 RPMs to produce the rated power. I knew the range would take a hit when applying...

Thanks for the detailed explanation walk through....really appreciate it.

I didnt see a calculator that lets you input additional loads on the powertrain... Can you provide a link?

I've been working on a couple of ideas to increase the range of EV vehicles with a primary focus on smooth steady level freeway driving (over 55mph speeds), when increased range is needed the most. Since the Tesla Model S represents the current state of the art in EV battery technology, I'm...

It looks like the charger efficiency is around 80%, based on a few posts I have found like these where people have equipment to measure how much AC input wattage is needed for a full charge. [/FONT][/COLOR] [/FONT][/COLOR] SOURCE...

Thanks for the replies, with the efficiencies and display information, I have a much better idea of what kind of power the on-board chargers are supplying. Hopefully one day I will own one a Tesla. If I find more info on the chargers elsewhere, I will post it.

Thanks for your reply. The reason I would like to know is for some research Im doing regarding directly charging with DC instead of using AC. For the super chargers, Ive read that they pump 440V DC at 90kw into the car. So is it safe to say that the amperage would be about 205A right?

The high power wall charger is rated at 240v 80amps AC. After the AC to DC conversion by the twin on-board chargers, does anyone know what the actual DC voltage/amperage output of the on-board chargers is that is feeding into the battery? I am also looking for information regarding the...