how to calculate the required torque in a electrical generator? for ex: Portable generator?

Question

i am having a electrical paper in my semester. I want to know about the design of a electrical generator

Answer 1

Torque is not the right question to ask in this problem!
First define the generator output in terms of watts.
Assume an efficiency of 0.8 for the generator and define the Input of the generator (In = Out / 0.8).
This is the output of your motor (assuming some diesel/petrol).
Torque is expressed as N/m (force x radius) and is part of the electric generator specs. See there to get the equivalence.
Usually, the motor power is also 0.8 efficient, so the motor power should be W / (0.8*0.8) and that will give you the right ratio.

Answer 2

i've got confidence it particularly is fullyyt based on the generator. It relies upon on the exchange in cutting-edge going throughout the time of the generator, the ability of the magnetic field, and the size of the coils. i think of yet another common thank you to do it would be to idealize the engine. Its skill output is x watts, so assuming consistent torque (huge assumption) it would be something like torque * rotational velocity of the engine = x (skill). it particularly is why electric powered autos have huge quantities of torque at low speeds.

Answer 3

You could use a physics-type of view that the energy supplied by the input is going to be equal to the output and an efficiency factor for your generator. Then, given the RPM of your motor, you can determine the torque because you will know the horsepower required to generate your wattage.