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electric bike

blackrecon117

Hi all,

 

I have recently started a placement year in industry which means MONEY!! and my dream for the last two years at uni has been to make an electric motor bike , I don't mean like a full on hit the motor way 70 mph (100km ph) kind of thing and nor do i mean an electric bicycle i mean a pocket bike style thing that has maybe a max range of 10 miles or more and a make speed of like 10mph being a robotics student I have a good idea on electronics but i am never good at researching parts or any kind of mechanical engineering and am struggling with calculations and values for different lipo cells i.e what difference will voltage make to the controller and so the motor ? or what does the mAh of a battery tell me and how long will it last ?

I have come to these forums asking for help from the engineering community , anything that would help or any resources , i know there is a DIY thing bit i didnt find it super helpful at explaining in details aspects of the pocket bike. thank you very much to this great community. 

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  • Hi

     

    So after doing some research I have decided on a 48V-36V set up i think 48V will be better just for power , I have also learnt a few other things about motors Firstly that voltage somewhat correlated to velocity and current and torque are related but more current doesn't equal more torque due to back EMF's and stuff, secondly i have learnt that a brushless motor that is an out run motor would be ideal for this project mainly as low speed high torques are way more effiencient that low tourqe high speed. brushless just because they last longer and are generally considered better choices my next step is to find just the right motor and also a controller for the motor I am becoming more and more keen to make my own one but i dont know how complicated that is for a brushless motor (brush being super easy) my next question would be to buy or not to buy a controller ?

     

    p.s is this a good place to document any kind or research i find ?

  • in reply to blackrecon117

    Hi Andrew,

    We are interested in your project so post away. If someone sees something that will cause you trouble you will get a reply.

    John

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