safe
Zone Moderator
Registered: 09/25/09
Posts: 119
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| | 10/02/09 at 11:30 AM | Reply with quote | #1 |
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Electric Bikes Need A Good Motor
As it is now the most common motor for ebikes is the brushed or brushless DC permanent magnet motor.
In order to get such a motor to work well within a power constraint (1000 watts) you are forced to do all kinds of things involving geardowns and multispeed gearing.
The thing I've been working on is an AC Induction motor that would be customized for the ebike and be able to deliver a wider powerband at lower rpm thus making a single speed ebike be able to deliver the maximum allowable power across the widest rpm range needed.
It's this sort of "base machine" that is lacking right now... anything with permanent magnets is going to need complex components and that drives up costs. Unless the sport is going to develop at a high cost level the need for low cost "appropriate" power is what is really lacking these days.
Before EBRR can become a sport it needs the machine to make it happen... and it's "not there yet" as they say...
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safe
Zone Moderator
Registered: 09/25/09
Posts: 119
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| | 10/05/09 at 05:46 PM | Reply with quote | #2 |
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http://www.chorusmotors.gi
Email Response From Chorus
Safe writes:
Chorus Motors,
Has your company ever considered creating a small lightweight
AC Induction motor/controller using Chorus technology built
specifically for the ebike market?
Permanent magnets have a narrow usable powerband, but the
AC Induction motor is being used in the more advanced electric
motorcycles (like the races at the Isle of Mann) and electric
cars. Your technology is superior to all the older designs.
In America the law limits ebikes to precisely 750 watts (1 hp) as
output from the motor and so what is needed is a high performance
light weight ebike motor that delivers a flat powerband from the
bottom to the top speed. It needs to operate at low voltage (48
volts at most) because you can't build machines for young kids that
are high voltage.
I'm not a company, just a hobbiest, so I have no business to do
with you directly, but if you could at least pass this idea on and
get people to consider the idea I would be grateful.
Thanks
Chorus responds:
We have thought about this for a while. I guess we will think some more.
Thanks!!!!
...which is very non-committal, but at least shows they are aware of the potential.
Maybe we will be talking about tricked out Chorus Motors in the coming years? 
(I hope so)
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safe
Zone Moderator
Registered: 09/25/09
Posts: 119
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| | 11/27/09 at 10:44 AM | Reply with quote | #3 |
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Halbach Disc Motor Go to the electric bike area... there is a thread for this...
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