John in CR wrote:
neptronix wrote:...Golden motor couldn't give me an answer about the kV on their motors, nor could their dealers! That was an issue i wasn't willing to look past....
I guess they weren't willing to look past the fact that Kv and a whole lot more motor performance information is included in their motor test reports listed right on the website with the motors. Hell, on the big motor they even include the phase resistance and inductance for the different winds.
They actually don't make sense to me. Like for the 104v motor in the 'curve', they say no load is 51xx RPM, but in their testing, they list 200A x 200v = 6000rpm = 20,000w for a 5000w motor.... what?
So i saw the no load rpm, but the figures on the top left me a bit confused and i wanted clarification. I called the dealer in Canada, he said they hadn't told him squat about the motor and that he couldn't get any answers from them, but if i find out, let him know
Then i got ahold of the Chinese sales dude on Skype.
Now, I worked customer service jobs for about 9 years of my life and answering stupid questions with a straight face is part of the job. When your main sales person in China is rude and keeps putting you on hold, making a 3 simple question conversation into a 30 minute conversation, ya tend to want to look elsewhere.
He didn't even have an answer for me. So i told him maybe i'd get the 104v model and run it at lower voltage.. then he said that running the slowest rpm/v motor on low volts would have overheated it, on a bike... and that it was a bad idea to do so.
And that is the story on how i ended up not buying the golden motor 5kW motor.
Now when i called motenergy, the person that picked up the phone was actually one of the engineers/design guys, and knew the rpm/v right off the top of the head, then started rattling off all sorts of info as soon as he heard i was hooking the motor up to an eBike.
BTW nechaus, which motor did you buy, the one for 48, 72, or 104v ( sometimes they call it a 96v.. )?