# Designing a generator

I am modeling the output voltage of an AC generator and I am using/I chose the following specifics:

• Number coil turns = 300. This is 1.02 mm gauge copper wire, so knowing the density of copper, I calculated the weight of the coil being 4.39 kg.
• Magnetic strength field = 1.24 T. Here are the specs for the magnet
• Area of 0.1 m$^2$
• The rpm will be 45

I want to know if the following variables I chose make sense.

Furthermore, I plugged these numbers into the output voltage equation

$$ε = NBAωsin(ωt)$$

to get a voltage value of 525.9. Is this number reasonable??

• this site uses slash\$ for mathjax – Neil_UK Mar 29 '16 at 5:39
• $N B A \omega sin(\omega t) = 300 \cdot 1.24 \cdot 1 (2 \pi \frac {45}{60}) sin(\omega t)= 1753 sin(\omega t)$ so that part is alright. (Remember that's about 1200 V rms.) I'm having difficulty imagining the physical layout of the magnet and $1~m^2$ coil and how you maintain 1.24 T throughout. Can you expand your question to include a sketch of the physical construction? – Transistor Mar 29 '16 at 9:57
• yes sorry i had a typo, it should read 0.1 for area and maximum voltage of 525.9 – user510 Mar 29 '16 at 14:04
• And some clues regarding the layout? – Transistor Mar 29 '16 at 14:22
• yes I don't know how the layout will look like (I am not very good at this). I had to model this for a project and because I do not know how this will look like, I was not sure if the numbers made sense. That is why I asked the question. – user510 Mar 29 '16 at 14:49