What effect does a change in frequency have on the power factor of a supply?
Maybe I’m missing something, but this question seems garbled. Power factor is an attribute of a load, not of a supply. 0.7 power factor means that the real and reactive components of the load are equal. A 2000 w, 240 volt load therefore corresponds to a load impedance of 28.8 + j 28.8 ohms. That load was at 50Hz. Inductive reactance is proportional to frequency – so with constant inductance in henries, the reactance will increase by 6/5 to 34.56 ohms. Therefore, the 2KW 0.7 power factor load will continue to be 2kw (the resistive component of load impedance hasn’t changed), but because the reactive component of the load impedance has increased, the power factor goes from 0.7 to 0.64.
