Re: (ET) E20 motor at 48V

[SteveS <stevesgroups verizon net>]

I thought the E20 was about 4-5 Hp with peak HP of 20 (hence the E-20 as 
in equal to a ICE with 20 HP). I don't think the 1 hour continuous 
rating would be a problem, I should be so lucky to be able to run a hour 
on the batteries I'll be able to carry!

Good discussion though. It's much cheaper to learn from mistakes on paper!

- SteveS


subscriptions aeolusdevelopment com wrote:
> SteveS Wrote
>   
> > Whoa. I thought it was more like 4 or 5. That changes things.
> >
> > Hmm - I guess the torque curves for the  motor does look like it says 
> > 1.2HP (the graph paper made it look like 4.2). But it shows about 10 
> > ft-lbs at 2250 RPM. Isn't HP :
> >     
>
> Remember electric motors have considerable peak torque above their
> nameplate rating.  That's likely what you are looking at (available
> torque).  It's not available for continuous use, only for short burst.  And
> as Walter says watch for continuous vs intermittent use.  Current is all
> important for long term ratings.  Too much current and it overheats (and
> you can get too much current at much lower than the motors rated voltage,
> just sit the motor is stall or only let it move slowly).
>
> Robert
>
>
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