How i can use power generator on the wheels Then this power

How i can use power generator on the wheels?? Then this power should be store on the some device ???? and what are the components , if I want to implemented to my small electronic wheelchair?

by connecting a dynamo to wheel chair we get enogh current to charge a battery of around 12 v.So this dynamo converts mechanical energy to electrical energy . Dynamo is connected to battery through some filters for storage of DC power.