ELEC1310 Lecture 15: ELEC1310 Week 8.15

• School: University of Newcastle
• Department: Electrical Engineering
• Course: ELEC1310
• Professor: Colin Coates

Document Summary

The flow of energy in ac circuits can be described as: Resulting power in an ac circuit can be graphed as: Average power: max power depending on cos component, referred to as power factor. Separate the denominator: divide the peak by 2. The general formula for any periodic voltage. The effective voltage and current are therefore. Implying that 240v will have an approx 340v peak. Defined as: an asterisk next to the current variable means that it is the complex conjugate. Can be written as the following to separate the real and reactive power. Complex power in a circuit (real and reactive) must be conserved. In an inductive load, i lags v: load absorbs reactive power. In a capacitive load, i leads v: load supplies reactive power. Power in a complex circuit has units va (watts is retained for real circuits)