Transformer Turns Ratio
Transformer Turns Ratio
A transformer steps voltage up or down in proportion to its turns ratio — the device that makes AC power distribution practical.
For an ideal transformer V_s = V_p·N_s/N_p. where V_p is the primary voltage and N_p, N_s the primary and secondary turns.
Inputs
V_p := 240 V=240 V
N_p := 800=800
N_s := 80=80
Secondary voltage scales with the turns ratio.
V_s := V_p·N_s/N_p=24 V
Results
Stepping voltage down steps current up by the same ratio (power is conserved). Real transformers lose a few percent to core and copper losses.
Assumptions & limitations
- Ideal, loss-free transformer.
- No load regulation effects.
- Sinusoidal steady state.