"You need to be more specific about exactly what you're trying to do, available power from the dynamo, battery capacity, current drawn by the load. Any and all of those will directly affect any design."
Ok, so sorry this has taken so long to reply to the project took a backseat for finals and break. Answering those needs in order: the dynamo is regulated with a maximum output of 3 watts, the battery capacity will be around 2200mAh, the current draw im told will be 100mA and the voltage needed will range 4-6volts.
The idea of this is that the batteries start off uncharged and as the dynamo runs a portion of power goes to charging the batteries and a portion goes to operating the EAP. (This to me seems like a lot to ask of a 3watt output but that is how i was asked to design it and my understanding of electronics are such that im not 100% it cant be done.) Once the batteries have been fully charged i'd like the system to "realize" that the batteries have been charged and shift all the output to running the EAP. Another requirement is that when the person running the dynamo gets tired they'll be able to stop pedaling and the system will shift from running off the dynamo to running off the battiers. This in a nut shell is what i'm trying to accomplish.