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| https://www.electricbike.com/electric-bike-law/ |
Every
one I know is either a 'nihilist' or a 'denialist'.
Most
people have no idea how bad life will be without gasoline. The USA
will be the hardest hit, just because we are so addicted to
petroleum. In other parts of the world they are gearing up to move
away from fossil fuels fast.
But
you can forget about large electric cars! They are going to be very
expensive and inefficient because the energy mongers want your money!
And when electric bikes get in the way of too many cars there will be
a crackdown.
The
laws will not change until we all understand the problems. This will
not happen by building illegal vehicles. Manufacturers of e-bikes
need to understand what it takes to build electric bicycles
correctly.
This
will involve a rear wheel, belt driven directly
from the motor, and a crank
activated power system that cannot push the vehicle faster than
the law allows. Unfortunately most people want a vehicle that moves
as fast as a car! That is a crisis of 'ignorance' (denial)!
There
would not be a problem with e-bikes if they were geared so
that they cannot be driven faster than 20 mph; regardless
of the amount of power used!!
All you have to do is take the maximum RPM the motor will
produce, and calculate
a gear ratio to keep the bike under the speed limit. This
will give you much better hill climbing ability, with less power!
Or
use a speed sensor to cut off the power when moving faster than the
correct speed. This will allow you to travel at, or below the speed
limit all day without burning out the power system. But the speed
sensor can be by passed too easily on some e-bikes.
Hub
motors are responsible for the power limitations of e-bikes, simply
because once you have that one-to-one
gear ratio
of a hub-motor, the cyclist will be able to exceed the speed-limit
with as
little as 350 watts. And
Mid-Drives
are
even worse!
The
main high tech thing to look for is a controller
that has a voltage multiplier in the slow speed output range.
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| http://commutercycling.blogspot.com/2015/02/mid-drive-power-systems.html |
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| velomobile design from the 1940's |
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