Hi Paul,
It takes a certain amount of power to push your bike through the air and
over the road at 50mph. In your case 100 amps at around 40 volts or roughly
4 HP. Changing your gear ratio will not change how much power it takes to
move the bike at 50 mph unless you are running the motor in a very
inefficient range in which case you may pick up a little efficiency. You
will not be able to drop down to a 40 amp draw unless you either
dramatically reduce your aero and rolling loses, or increase your pack
voltage.
BTW - Your numbers are already a little bit better than mine.
damon
From: paul wiley <[EMAIL PROTECTED]>
Reply-To: ElectricMotorcycles <[email protected]>
To: ElectricMotorcycles <[email protected]>
Subject: Re: [ElectricMotorcycles] Planetary Gear Reduction with Belt drive
Date: Wed, 24 May 2006 07:34:17 -0700 (PDT)
Hi Andrew,
I have a single Etek, 48 volts (pc1200 hawkers), 400 amp Alltrax
controller. I am running a chain drive direct.. At 50 mph i have a 100 amp
draw (way to much!!) the ratio is 14f and 43 rear. I just thru the
sprockets on that i had and now i have to get them closer to the 40 amps
that i want at 50 mph. The best part is that the etek a common shaft for
industrial stuff, and the honda rear i can get a whole bunch of sprockets
I chose the chain instead of a shaft bike due to loss. Chain drives are
still the most efficient way to transfere power. I dont have the experience
putting motors together so i cant help you there. good luck, GAME ON!
Paul.
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