Generator Peak EMF
Generator Peak EMF
A coil rotating in a magnetic field generates a sinusoidal EMF whose peak is set by the coil, field and speed.
The peak EMF is e = N·B·A·ω. where N is the number of turns, B the flux density, A the coil area and ω the angular speed.
Inputs
N := 200=200
B := 0.4 T=0.4 kg/A/s^2
A := 0.02 m^2=0.02 m^2
omega := 314 rad/s=314 Hz
Multiply turns, field, area and angular speed.
emf := N·B·A·omega=502.4 V
Results
More turns, a stronger field or faster rotation all raise the output voltage. The RMS value is this peak divided by √2.
Assumptions & limitations
- Sinusoidal output.
- Uniform field over the coil.
- Peak (not RMS) value.