If i am using a permanent magnet dc motor as generator then how should i calculate how much electricity the motor will produce ? or lets say i want to produce 1kw power with permanent magnet dc motor then how much hp motor i shd choose
I'm not an expert on this, but I'll give it my best guess. To try to point you in the right direction. First, you need to know the torque of this magnet. 1 horse power 0.74569 kilowatts So to get a 1 kilowatts, you need 1.35962 horsepower. The motor will have a certain efficiency. I do not know if this is factored in to the motors power rating, however if the efficiency is, say, 90%. Then you will need to divide the horse power by 0.9 to get the correct horse power rating. Is this a motor part of a diesel / fuel generator, or is it part of a wind turbine / water turbine?
