Home Made Hybrid Electric and Pedal-assisted Bicyle

My husband, Ben,s home made electric and pedal assisted hybrid bicycle

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Autos & Vehicles

Tags:

• Bicycle
• electric
• hybrid
• home
• made
• pedal
• assisted
• ben
• burrow
• fantastic
• engineering
• Bike
• Ride
• Biking
• battery
• Cycling
• Mountain
• bike
• incredible

[MrAfroSheen]

No freewheel? You are forced to always pedal? And no controller? Just an on/off switch? I like the belt drive but just an on/off switch and no controller is bad design. The idea of an electric bike for commuting to work like you are doing is to not arrive sweaty at work.

[NicolaBurrow]

Thanks for your comment. You're right that a freewheel would be advantageos and I was considering it, but as I managed perfectly well without it I didnt bother.Regarding a speed controller,by keeping the correct cadence while pedalling the motor always works at its most efficient rpm so one is not necessary.I am not forced to pedal.Yes my legs alwways move but how hard you push is up to the rider.However I do tend to cycle as hard as I would on an ordinary bicycle but I just get there faster.

[NicolaBurrow]

I should just add that it is far from perfect but does suit my needs .The biggest drawbacks are the heavy batterries and cheap steel frame.This bike is no longer operational since the batteries have since died .They didnt last as long as I'd hoped but thats another story.I was looking at replacing them with a lithium battery , but whilst looking I came across an e bike with lithium battery for not much more cost than just a batterry so I bought the bike instead.

[DeltaWound]

Nice. How many amps are you running through that motor? Bet it's got pretty good torque with a reduction like that.

[NicolaBurrow]

The motor is rated at 14 amps and 2500 rpm.But im not entirely sure what this means exactly, as the motor actually turns at about 5000 rpm. I think it would mean that any more than 14 amps would over load the motor therefore it must be kept turning at a minimum of 2500 rpm. Does this therefore mean that at full speed the motor would use about 7 amps.Input from an expert would be appreciated on this point.

[myzt1qu3]

really nice work...

I am also thinking of going green!!!

^^

[NicolaBurrow]

Thanks for your comment. I have now upgraded the motor to one of 350 watts, so watch this space for an updated video.

[johnnnyreb51]

@MrAfroSheen If the stock rear wheel is used, you can free wheel by turning the motor off.

[sbrust1]

nice work;)

[7188181]

You are making the wrong assumptions. You should have left well enough alone. You were very lucky to get 28+ miles with one charge. By using a larger voltage motor and reducing your battery size, you will most likely reduce your range. You had a very good setup but people always fix things that aren't broken.

[DeltaWound]

The 14A thing is supposed to be what it can handle continuously (can handle more), and 2500RPM is how fast it's supposed to spin (loaded) on 24V according to its voltage constant. Odd it spins so fast.

I wasn't paying attention to the whole setup the first time; more to just the reduction. I see it's running just on a switch, rather than a controller, so the peak amps is going to be dictated by it's internal resistance. Probably somewhere between 20 and 50A max on 24V. So, yes, crazy torque. ;)