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Old 04-24-10, 02:45 PM   #1
Unknown Cyclist
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General advice on electric motors.

I've been reading through the threads and can't see the info I'm looking for.

Are people using AC or DC motors ?

How many Watts or HP ?

One of the motors I've been considering is this:

http://www.hobbyking.com/hobbyking/s...idProduct=5139

It equates to about 9hp, should I go with this or look for a DC alternative ?

What motors are people using ?

I'm in the UK and really don't know where to look for a suitable motor.

I'm interested in all opinions and advice

TIA.

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Old 04-24-10, 03:10 PM   #2
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It depends, if you`ve got a driving licence or not. Here in Austria and Germany you may drive a 250 Watt bicycle without a licence plate.
You ride 25-40 kms an hour. Some years before, they developed in the Technical University in Biel, Switzerland, a 1000 Watt bicycle,
a sportive girl rode nearly 100 kms an hour. It`s possible to buy stronger motors, but, as I told before, you`d need a driving licence
and a licence plate.

Hope this short info was helpful,

Hans
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Old 04-24-10, 03:35 PM   #3
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AFAIK the limitation here is whether or not it can exceed 15mph.

Whether there is a power or weight limit I don't know.
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Old 04-24-10, 07:18 PM   #4
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Almost all E-Assist motors are brushless DC. A few are still brushed DC.

That motor you are looking at is a hobby brushless DC motor requiring a sensorless brushless speed control. It is capable of over an order of magnitude more power than would be legal for an e-bike in most locations...
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Old 04-25-10, 05:52 PM   #5
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Has anyone got any suggestions for the following:

1) how many watts for a useful electric bike ?

2) what capacity battery ?

3) make/supplier of suitable motors in the UK ?

TIA
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