Quote:
Originally Posted by Nycteus
You're correct concerning the fact that magnetic motors have a huge benefit at 0 RPM and deteriorated benefit at higher RPM's. Here's a power and torque chart comparing a standard high output 6 cylinder vs. a magnetic motor:
This was taken from: http://www.teslamotors.com/performan...and_torque.php |
I'm an electrical engineer also. Apparently there are too many of us?!
Anyway, a series wound DC motor has infinite torque at 0 RPM, a whole lot of torque at low RPMs and then it loses torque quickly at higher RPMs. However, you don't have to use series wound motors or for that matter even DC motors either. Ford made an electric car with an inverter a few years ago that had AC motors. You can also wind a DC motor so that the torque curve is what you want it to be more or less. You can get good torque at higher RPMs if you do it right. It's sort of an art.
Regarding recharging, I envision a future where you have a little trailer attached to the back of your vehicle that holds the batteries. You stop at a little roadside (we'll call it a filling station) when you have a low charge, and you just swap out your trailer for a freshly charged one. That's just about the most practical way to do it. Will it happen in our lifetime? Probably not, but I think it's the only way to practically use a fully electric car as a replacement for the cars of today. I like fuel cells myself. Hydrogen is a great fuel if it doesn't explode on you.
