OP
EastAnglian
Uksel - Just as the Nominal Voltage is oscillating then so is the Current - that's why its called "Alternating Current" as it flows in opposite directions each half cycle. It is therefore just as valid to describe the nominal voltage of the UK supply as 230V RMS as it is to refer to an alternating current of 100A RMS.
When using Ohms law to calculate an AC current flowing in a load as a result of an AC Voltage we replace "Resistance" by "Impedance". Impedance is a complex resistance which is related to how the load responds to an alternating current. The load's capacitance and inductance as well as resistance all contribute to its impedance. As capacitive and inductive reactance are related to the frequency of the alternating current/voltage then there can be a frequency dependence on the equation.
For PFC we assume that at 50Hz the impedance of the source (ie Ze) is a simple resistive value.
So Ipfc=Uo/Ze
When using Ohms law to calculate an AC current flowing in a load as a result of an AC Voltage we replace "Resistance" by "Impedance". Impedance is a complex resistance which is related to how the load responds to an alternating current. The load's capacitance and inductance as well as resistance all contribute to its impedance. As capacitive and inductive reactance are related to the frequency of the alternating current/voltage then there can be a frequency dependence on the equation.
For PFC we assume that at 50Hz the impedance of the source (ie Ze) is a simple resistive value.
So Ipfc=Uo/Ze
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