Interesting engineering problem. Let's analyze the information given: Floating water wheel river turbine, connected to a 3-phase permanent magnet generator. The information about the 3-phase type, and the permanent magnet type provide no help in finding a solution. The requirement is that the generator produce 500W constant power to charge 12V battery. So, we have power and voltage, therefore we can compute current. However, having the value of current does not help us figure out dimensions of this water wheel. We have water flow speed. How did you calculate the emf constant? Is there additional information to this problem? |