Quote:
Originally Posted by puddleglum
Hope you don't mind all the questions, but you are the guy that made it work.
|
Hey it's no problem at all. This thread is meant to pass on things I have learned the (hard way!) to others.
It would be awesome if you could pull off coupling both motors together. You could then series-parallel switch them and broaden your power band like crazy - with an electric "shift".
I almost bought a Kelly "sepex" controller. The " " is because it really isn't a real sepex controller. Notice that on their ordering screen you specify what field voltage you want. The controller gives the field this voltage whenever the throttle is depressed and does not vary it like a proper sepex controller. I ran my motor with a constant field voltage for the first while and believe me, it wasn't much fun. It makes for very weird throttle response - like a farm tractor where 25% throttle = 25% rpm, 50% throttle = 50% rpm, etc.
My field controller is a Kelly controller and it has proven to be very reliable so far.
The MVX-4300 has a 1 ohm field, so 50A requires 50V.
I haven't reached top speed yet. I just never bothered once the weather got cold and the batteries became "lazy". However, once it gets warm bennelson, MetroMPG and I are apparently having a "virtual drag race", whatever that means!
The fastest I have reached is 85 km/h (53 mph) in 3rd, which is 4470 rpm. It won't go as fast in 3rd now that I am giving it more field than back then, but 4th will be much stronger now, plus I have AGM batteries now, so it should do 90-95 km/h (56-59 mph) now. But I wouldn't do that for long and possibly bake my tiny motor.
One of these days I will do a proper top speed run.....